Refactor pkgmgr into modular installer pipeline with Nix flake support, PKGBUILD build workflow, local Nix cache, and full test suite restructuring.

See conversation: https://chatgpt.com/share/69332519-7ff4-800f-bc21-7fcd24a66c10

.dockerignore

@@ -0,0 +1,26 @@
+# Docker build context cleanup
+
+# Nix local store/cache
+.nix/
+
+# Git internals
+.git
+.gitignore
+
+# Python
+__pycache__/
+*.py[cod]
+*.egg-info/
+dist/
+build/
+
+# venvs
+.venv/
+venv/
+.venvs/
+
+# Editor/OS noise
+.vscode/
+.idea/
+.DS_Store
+Thumbs.db

.gitignore

@@ -25,3 +25,6 @@ build/
 # OS noise
 .DS_Store
 Thumbs.db
+
+# Nix Cache to speed up tests
+.nix/

Dockerfile

@@ -1,40 +1,31 @@
 FROM archlinux:latest
 
-# Update system and install core tooling
+# 1) System basis + Nix
 RUN pacman -Syu --noconfirm \
     && pacman -S --noconfirm --needed \
+        base-devel \
         git \
-        make \
-        sudo \
-        python \
-        python-pip \
-        python-virtualenv \
-        python-setuptools \
-        python-wheel \
+        nix \
     && pacman -Scc --noconfirm
 
-# Ensure local bin is in PATH (for pkgmgr links)
-ENV PATH="/root/.local/bin:$PATH"
+ENV NIX_CONFIG="experimental-features = nix-command flakes"
 
-# Create virtual environment
-ENV VIRTUAL_ENV=/root/.venvs/pkgmgr
-RUN python -m venv $VIRTUAL_ENV
-ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+# 2) Unprivileged user for building Arch packages
+RUN useradd -m builder
+WORKDIR /build
 
-# Working directory for the package-manager project
-WORKDIR /root/Repositories/github.com/kevinveenbirkenbach/package-manager
+# 3) Only PKGBUILD rein, um dein Wrapper-Paket zu bauen
+COPY PKGBUILD .
 
-# Copy local package-manager source into container
-COPY . .
-
-# Install Python dependencies and register pkgmgr inside the venv
-RUN pip install --upgrade pip \
-    && pip install PyYAML \
-    && chmod +x main.py \
-    && python main.py install package-manager --quiet --clone-mode shallow --no-verification
-
-# Copy again to allow rebuild-based code changes
+RUN chown -R builder:builder /build \
+    && su builder -c "makepkg -s --noconfirm --clean" \
+    && pacman -U --noconfirm package-manager-*.pkg.tar.* \
+    && rm -rf /build
+
+# 4) Projekt-Quellen für Tests in den Container kopieren
+WORKDIR /src
 COPY . .
 
+# pkgmgr (Arch-Package) ist installiert und ruft nix run auf.
 ENTRYPOINT ["pkgmgr"]
 CMD ["--help"]

Makefile

@@ -1,31 +1,53 @@
-.PHONY: install setup uninstall aur_builder_setup
+.PHONY: install setup uninstall aur_builder_setup test
+
+# Local Nix cache directories in the repo
+NIX_STORE_DIR := .nix/store
+NIX_CACHE_DIR := .nix/cache
 
 setup: install
-	@python3 main.py install
+	@echo "Running pkgmgr setup via main.py..."
+	@if [ -x "$$HOME/.venvs/pkgmgr/bin/python" ]; then \
+		echo "Using virtualenv Python at $$HOME/.venvs/pkgmgr/bin/python"; \
+		"$$HOME/.venvs/pkgmgr/bin/python" main.py install; \
+	else \
+		echo "Virtualenv not found, falling back to system python3"; \
+		python3 main.py install; \
+	fi
 
 test:
+	@echo "Ensuring local Nix cache directories exist..."
+	@mkdir -p "$(NIX_STORE_DIR)" "$(NIX_CACHE_DIR)"
+	@echo "Building test image 'package-manager-test'..."
 	docker build -t package-manager-test .
-	docker run --rm --entrypoint python package-manager-test -m unittest discover -s tests -p "test_*.py"
+	@echo "Running tests inside Nix devShell with local cache..."
+	docker run --rm \
+		-v "$$(pwd)/$(NIX_STORE_DIR):/nix" \
+		-v "$$(pwd)/$(NIX_CACHE_DIR):/root/.cache/nix" \
+		--workdir /src \
+		--entrypoint nix \
+		package-manager-test \
+		develop .#default --no-write-lock-file -c \
+			python -m unittest discover -s tests -p "test_*.py"
 
 install:
 	@echo "Making 'main.py' executable..."
 	@chmod +x main.py
 	@echo "Checking if global user virtual environment exists..."
-	@mkdir -p ~/.venvs
-	@if [ ! -d ~/.venvs/pkgmgr ]; then \
-		echo "Creating global venv at ~/.venvs/pkgmgr..."; \
-		python3 -m venv ~/.venvs/pkgmgr; \
+	@mkdir -p "$$HOME/.venvs"
+	@if [ ! -d "$$HOME/.venvs/pkgmgr" ]; then \
+		echo "Creating global venv at $$HOME/.venvs/pkgmgr..."; \
+		python3 -m venv "$$HOME/.venvs/pkgmgr"; \
 	fi
-	@echo "Installing required Python packages into ~/.venvs/pkgmgr..."
-	@~/.venvs/pkgmgr/bin/python -m ensurepip --upgrade
-	@~/.venvs/pkgmgr/bin/pip install --upgrade pip setuptools wheel
-	@~/.venvs/pkgmgr/bin/pip install -r requirements.txt
-	@echo "Ensuring ~/.bashrc and ~/.zshrc exist..."
-	@touch ~/.bashrc ~/.zshrc
-	@echo "Ensuring automatic activation of ~/.venvs/pkgmgr for this user..."
-	@for rc in ~/.bashrc ~/.zshrc; do \
-		rc_line='if [ -d "$${HOME}/.venvs/pkgmgr" ]; then . "$${HOME}/.venvs/pkgmgr/bin/activate"; echo "Global Python virtual environment '\''~/.venvs/pkgmgr'\'' activated."; fi'; \
-		grep -qxF "$${rc_line}" $$rc || echo "$${rc_line}" >> $$rc; \
+	@echo "Installing required Python packages into $$HOME/.venvs/pkgmgr..."
+	@$$HOME/.venvs/pkgmgr/bin/python -m ensurepip --upgrade
+	@$$HOME/.venvs/pkgmgr/bin/pip install --upgrade pip setuptools wheel
+	@$$HOME/.venvs/pkgmgr/bin/pip install -r requirements.txt
+	@echo "Ensuring $$HOME/.bashrc and $$HOME/.zshrc exist..."
+	@touch "$$HOME/.bashrc" "$$HOME/.zshrc"
+	@echo "Ensuring automatic activation of $$HOME/.venvs/pkgmgr for this user..."
+	@for rc in "$$HOME/.bashrc" "$$HOME/.zshrc"; do \
+		rc_line='if [ -d "$${HOME}/.venvs/pkgmgr" ]; then . "$${HOME}/.venvs/pkgmgr/bin/activate"; if [ -n "$${PS1:-}" ]; then echo "Global Python virtual environment '\''~/.venvs/pkgmgr'\'' activated."; fi; fi'; \
+		grep -qxF "$${rc_line}" "$$rc" || echo "$${rc_line}" >> "$$rc"; \
 	done
 	@echo "Arch/Manjaro detection and optional AUR setup..."
 	@if command -v pacman >/dev/null 2>&1; then \
@@ -56,9 +78,9 @@ aur_builder_setup:
 
 uninstall:
 	@echo "Removing global user virtual environment if it exists..."
-	@rm -rf ~/.venvs/pkgmgr
-	@echo "Cleaning up ~/.bashrc and ~/.zshrc entries..."
-	@for rc in ~/.bashrc ~/.zshrc; do \
-		sed -i '/\.venvs\/pkgmgr\/bin\/activate"; echo "Global Python virtual environment '\''~\/\.venvs\/pkgmgr'\'' activated."; fi/d' $$rc; \
+	@rm -rf "$$HOME/.venvs/pkgmgr"
+	@echo "Cleaning up $$HOME/.bashrc and $$HOME/.zshrc entries..."
+	@for rc in "$$HOME/.bashrc" "$$HOME/.zshrc"; do \
+		sed -i '/\.venvs\/pkgmgr\/bin\/activate"; if \[ -n "\$${PS1:-}" \]; then echo "Global Python virtual environment '\''~\/\.venvs\/pkgmgr'\'' activated."; fi; fi/d' "$$rc"; \
 	done
 	@echo "Uninstallation complete. Please restart your shell (or 'exec bash' or 'exec zsh') for the changes to fully apply."

PKGBUILD

@@ -3,37 +3,38 @@
 pkgname=package-manager
 pkgver=0.1.0
 pkgrel=1
-pkgdesc="A configurable Python tool to manage multiple repositories via Bash and automate common Git operations."
+pkgdesc="Wrapper that runs Kevin's package-manager via Nix flake."
 arch=('any')
 url="https://github.com/kevinveenbirkenbach/package-manager"
 license=('MIT')
 
-depends=(
-  'python'
-  'python-yaml'
-  'git'
-  'bash'
-)
+# Nix is the only runtime dependency.
+depends=('nix')
 
-makedepends=(
-  'python-build'
-  'python-installer'
-  'python-wheel'
-  'python-setuptools'
-)
+makedepends=()
 
-source=("$pkgname-$pkgver.tar.gz::$url/archive/refs/tags/v$pkgver.tar.gz")
-sha256sums=('SKIP')
+source=()
+sha256sums=()
 
 build() {
-  cd "$srcdir/$pkgname-$pkgver"
-  python -m build --wheel --no-isolation
+  :
 }
 
 package() {
-  cd "$srcdir/$pkgname-$pkgver"
-  python -m installer --destdir="$pkgdir" dist/*.whl
+  install -d "$pkgdir/usr/bin"
 
-  # Optional: add pkgmgr executable symlink
-  install -Dm755 main.py "$pkgdir/usr/bin/pkgmgr"
+  cat > "$pkgdir/usr/bin/pkgmgr" << 'EOF'
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Enable flakes if not already configured.
+if [[ -z "${NIX_CONFIG:-}" ]]; then
+  export NIX_CONFIG="experimental-features = nix-command flakes"
+fi
+
+# Run package-manager via Nix flake
+exec nix run "github:kevinveenbirkenbach/package-manager#pkgmgr" -- "$@"
+EOF
+
+  chmod 755 "$pkgdir/usr/bin/pkgmgr"
 }

flake.nix

@@ -1,7 +1,3 @@
-# flake.nix
-# This file defines a Nix flake providing a reproducible development environment
-# and optional installation package for the package-manager tool.
-
 {
   description = "Nix flake for Kevin's package-manager tool";
 
@@ -11,30 +7,75 @@
 
   outputs = { self, nixpkgs }:
     let
-      pkgs = nixpkgs.legacyPackages.x86_64-linux;
+      systems = [ "x86_64-linux" "aarch64-linux" ];
+
+      # Small helper: build an attrset for all systems
+      forAllSystems = f:
+        builtins.listToAttrs (map (system: {
+          name = system;
+          value = f system;
+        }) systems);
     in {
+      # Dev shells: nix develop .#default (on both architectures)
+      devShells = forAllSystems (system:
+        let
+          pkgs   = nixpkgs.legacyPackages.${system};
+          python = pkgs.python311;
+          pypkgs = pkgs.python311Packages;
 
-      # Development environment used via: nix develop
-      devShells.default = pkgs.mkShell {
-        # System packages for development
-        buildInputs = [
-          pkgs.python311
-          pkgs.python311Packages.pyyaml
-          pkgs.git
-        ];
+          # Be robust: ansible-core if available, otherwise ansible.
+          ansiblePkg =
+            if pkgs ? ansible-core then pkgs.ansible-core
+            else pkgs.ansible;
+        in {
+          default = pkgs.mkShell {
+            buildInputs = [
+              python
+              pypkgs.pyyaml
+              pkgs.git
+              ansiblePkg
+            ];
+            shellHook = ''
+              echo "Entered pkgmgr development environment for ${system}";
+            '';
+          };
+        }
+      );
 
-        # Message shown on environment entry
-        shellHook = ''
-          echo "Entered pkgmgr development environment";
-        '';
-      };
+      # Packages: nix build .#pkgmgr / .#default
+      packages = forAllSystems (system:
+        let
+          pkgs   = nixpkgs.legacyPackages.${system};
+          python = pkgs.python311;
+          pypkgs = pkgs.python311Packages;
 
-      # Optional installable package for "nix profile install"
-      packages.pkgmgr = pkgs.python311Packages.buildPythonApplication {
-        pname = "package-manager";
-        version = "0.1.0";
-        src = ./.;
-        propagatedBuildInputs = [ pkgs.python311Packages.pyyaml ];
-      };
+          pkgmgrPkg = pypkgs.buildPythonApplication {
+            pname = "package-manager";
+            version = "0.1.0";
+            src = ./.;
+
+            propagatedBuildInputs = [
+              pypkgs.pyyaml
+              # add further dependencies here
+            ];
+          };
+        in {
+          pkgmgr  = pkgmgrPkg;
+          default = pkgmgrPkg;
+        }
+      );
+
+      # Apps: nix run .#pkgmgr / .#default
+      apps = forAllSystems (system:
+        let
+          pkgmgrPkg = self.packages.${system}.pkgmgr;
+        in {
+          pkgmgr = {
+            type = "app";
+            program = "${pkgmgrPkg}/bin/pkgmgr";
+          };
+          default = self.apps.${system}.pkgmgr;
+        }
+      );
     };
 }

pkgmgr/context.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Shared context object for repository installation steps.
+
+This data class bundles all information needed by installer components so
+they do not depend on global state or long parameter lists.
+"""
+
+from dataclasses import dataclass
+from typing import Any, Dict, List
+
+
+@dataclass
+class RepoContext:
+    """Container for all repository-related data used during installation."""
+
+    repo: Dict[str, Any]
+    identifier: str
+    repo_dir: str
+    repositories_base_dir: str
+    bin_dir: str
+    all_repos: List[Dict[str, Any]]
+
+    no_verification: bool
+    preview: bool
+    quiet: bool
+    clone_mode: str
+    update_dependencies: bool

pkgmgr/install_repos.py

@@ -1,243 +1,203 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Repository installation pipeline for pkgmgr.
+
+This module orchestrates the installation of repositories by:
+
+  1. Ensuring the repository directory exists (cloning if necessary).
+  2. Verifying the repository according to the configured policies.
+  3. Creating executable links using create_ink().
+  4. Running a sequence of modular installer components that handle
+     specific technologies or manifests (pkgmgr.yml, PKGBUILD, Nix,
+     Ansible requirements, Python, Makefile).
+
+The goal is to keep this file thin and delegate most logic to small,
+focused installer classes.
+"""
+
 import os
-import subprocess
-import sys
-import tempfile
-import shutil
-import yaml
+from typing import List, Dict, Any, Tuple
 
 from pkgmgr.get_repo_identifier import get_repo_identifier
 from pkgmgr.get_repo_dir import get_repo_dir
 from pkgmgr.create_ink import create_ink
-from pkgmgr.run_command import run_command
 from pkgmgr.verify import verify_repository
 from pkgmgr.clone_repos import clone_repos
 
+from pkgmgr.context import RepoContext
 
-def _extract_pkgbuild_array(repo_dir: str, var_name: str) -> list:
-    """
-    Extract a Bash array (depends/makedepends) from PKGBUILD using bash itself.
-    Returns a list of package names or an empty list on error.
-    """
-    pkgbuild_path = os.path.join(repo_dir, "PKGBUILD")
-    if not os.path.exists(pkgbuild_path):
-        return []
+# Installer implementations
+from pkgmgr.installers.pkgmgr_manifest import PkgmgrManifestInstaller
+from pkgmgr.installers.pkgbuild import PkgbuildInstaller
+from pkgmgr.installers.nix_flake import NixFlakeInstaller
+from pkgmgr.installers.ansible_requirements import AnsibleRequirementsInstaller
+from pkgmgr.installers.python import PythonInstaller
+from pkgmgr.installers.makefile import MakefileInstaller
+from pkgmgr.installers.aur import AurInstaller
 
-    script = f'source PKGBUILD >/dev/null 2>&1; printf "%s\\n" "${{{var_name}[@]}}"'
-    try:
-        output = subprocess.check_output(
-            ["bash", "-lc", script],
-            cwd=repo_dir,
-            text=True,
+
+# Ordered list of installers to apply to each repository
+INSTALLERS = [
+    PkgmgrManifestInstaller(),
+    PkgbuildInstaller(),
+    NixFlakeInstaller(),
+    AnsibleRequirementsInstaller(),
+    PythonInstaller(),
+    MakefileInstaller(),
+    AurInstaller(),
+]
+
+
+def _ensure_repo_dir(
+    repo: Dict[str, Any],
+    repositories_base_dir: str,
+    all_repos: List[Dict[str, Any]],
+    preview: bool,
+    no_verification: bool,
+    clone_mode: str,
+    identifier: str,
+) -> str:
+    """
+    Ensure the repository directory exists. If not, attempt to clone it.
+
+    Returns the repository directory path or an empty string if cloning failed.
+    """
+    repo_dir = get_repo_dir(repositories_base_dir, repo)
+
+    if not os.path.exists(repo_dir):
+        print(f"Repository directory '{repo_dir}' does not exist. Cloning it now...")
+        clone_repos(
+            [repo],
+            repositories_base_dir,
+            all_repos,
+            preview,
+            no_verification,
+            clone_mode,
         )
-    except Exception:
-        return []
+        if not os.path.exists(repo_dir):
+            print(f"Cloning failed for repository {identifier}. Skipping installation.")
+            return ""
 
-    return [line.strip() for line in output.splitlines() if line.strip()]
+    return repo_dir
 
 
-def _install_arch_dependencies_from_pkgbuild(repo_dir: str, preview: bool) -> None:
-    """
-    If PKGBUILD exists and pacman is available, install depends + makedepends
-    via pacman.
-    """
-    if shutil.which("pacman") is None:
-        return
-
-    pkgbuild_path = os.path.join(repo_dir, "PKGBUILD")
-    if not os.path.exists(pkgbuild_path):
-        return
-
-    depends = _extract_pkgbuild_array(repo_dir, "depends")
-    makedepends = _extract_pkgbuild_array(repo_dir, "makedepends")
-    all_pkgs = depends + makedepends
-
-    if not all_pkgs:
-        return
-
-    cmd = "sudo pacman -S --noconfirm " + " ".join(all_pkgs)
-    run_command(cmd, preview=preview)
-
-
-def _install_nix_flake_profile(repo_dir: str, preview: bool) -> None:
-    """
-    If flake.nix exists and 'nix' is available, try to install a profile
-    from the flake. Convention: try .#pkgmgr, then .#default.
-    """
-    flake_path = os.path.join(repo_dir, "flake.nix")
-    if not os.path.exists(flake_path):
-        return
-    if shutil.which("nix") is None:
-        print("Warning: flake.nix found but 'nix' command not available. Skipping flake setup.")
-        return
-
-    print("Nix flake detected, attempting to install profile output...")
-    for output in ("pkgmgr", "default"):
-        cmd = f"nix profile install {repo_dir}#{output}"
-        try:
-            run_command(cmd, preview=preview)
-            print(f"Nix flake output '{output}' successfully installed.")
-            break
-        except SystemExit as e:
-            print(f"[Warning] Failed to install Nix flake output '{output}': {e}")
-
-
-def _install_pkgmgr_dependencies_from_manifest(
+def _verify_repo(
+    repo: Dict[str, Any],
     repo_dir: str,
     no_verification: bool,
-    update_dependencies: bool,
-    clone_mode: str,
+    identifier: str,
+) -> bool:
+    """
+    Verify the repository using verify_repository().
+
+    Returns True if installation should proceed, False if it should be skipped.
+    """
+    verified_info = repo.get("verified")
+    verified_ok, errors, commit_hash, signing_key = verify_repository(
+        repo,
+        repo_dir,
+        mode="local",
+        no_verification=no_verification,
+    )
+
+    if not no_verification and verified_info and not verified_ok:
+        print(f"Warning: Verification failed for {identifier}:")
+        for err in errors:
+            print(f"  - {err}")
+        choice = input("Proceed with installation? (y/N): ").strip().lower()
+        if choice != "y":
+            print(f"Skipping installation for {identifier}.")
+            return False
+
+    return True
+
+
+def _create_context(
+    repo: Dict[str, Any],
+    identifier: str,
+    repo_dir: str,
+    repositories_base_dir: str,
+    bin_dir: str,
+    all_repos: List[Dict[str, Any]],
+    no_verification: bool,
     preview: bool,
-) -> None:
+    quiet: bool,
+    clone_mode: str,
+    update_dependencies: bool,
+) -> RepoContext:
     """
-    Read pkgmgr.yml (if present) and install referenced pkgmgr repository
-    dependencies.
-
-    Expected format:
-
-    version: 1
-    author: "..."
-    url: "..."
-    description: "..."
-    dependencies:
-      - repository: github:user/repo
-        version: main
-        reason: "Optional description"
+    Build a RepoContext for the given repository and parameters.
     """
-    manifest_path = os.path.join(repo_dir, "pkgmgr.yml")
-    if not os.path.exists(manifest_path):
-        return
-
-    try:
-        with open(manifest_path, "r", encoding="utf-8") as f:
-            manifest = yaml.safe_load(f) or {}
-    except Exception as e:
-        print(f"Error loading pkgmgr.yml in '{repo_dir}': {e}")
-        return
-
-    dependencies = manifest.get("dependencies", []) or []
-    if not isinstance(dependencies, list) or not dependencies:
-        return
-
-    # Optional: show basic metadata (author/url/description) if present
-    author = manifest.get("author")
-    url = manifest.get("url")
-    description = manifest.get("description")
-
-    if not preview:
-        print("pkgmgr manifest detected:")
-        if author:
-            print(f"  author: {author}")
-        if url:
-            print(f"  url: {url}")
-        if description:
-            print(f"  description: {description}")
-
-    dep_repo_ids = []
-    for dep in dependencies:
-        if not isinstance(dep, dict):
-            continue
-        repo_id = dep.get("repository")
-        if repo_id:
-            dep_repo_ids.append(str(repo_id))
-
-    # Optionally: update (pull) dependencies before installing
-    if update_dependencies and dep_repo_ids:
-        cmd_pull = "pkgmgr pull " + " ".join(dep_repo_ids)
-        try:
-            run_command(cmd_pull, preview=preview)
-        except SystemExit as e:
-            print(f"Warning: 'pkgmgr pull' for dependencies failed (exit code {e}).")
-
-    # Install dependencies one by one
-    for dep in dependencies:
-        if not isinstance(dep, dict):
-            continue
-
-        repo_id = dep.get("repository")
-        if not repo_id:
-            continue
-
-        version = dep.get("version")
-        reason = dep.get("reason")
-
-        if reason and not preview:
-            print(f"Installing dependency {repo_id}: {reason}")
-        else:
-            print(f"Installing dependency {repo_id}...")
-
-        cmd = f"pkgmgr install {repo_id}"
-
-        if version:
-            cmd += f" --version {version}"
-
-        if no_verification:
-            cmd += " --no-verification"
-
-        if update_dependencies:
-            cmd += " --dependencies"
-
-        if clone_mode:
-            cmd += f" --clone-mode {clone_mode}"
-
-        try:
-            run_command(cmd, preview=preview)
-        except SystemExit as e:
-            print(f"[Warning] Failed to install dependency '{repo_id}': {e}")
+    return RepoContext(
+        repo=repo,
+        identifier=identifier,
+        repo_dir=repo_dir,
+        repositories_base_dir=repositories_base_dir,
+        bin_dir=bin_dir,
+        all_repos=all_repos,
+        no_verification=no_verification,
+        preview=preview,
+        quiet=quiet,
+        clone_mode=clone_mode,
+        update_dependencies=update_dependencies,
+    )
 
 
 def install_repos(
-    selected_repos,
-    repositories_base_dir,
-    bin_dir,
-    all_repos,
-    no_verification,
-    preview,
-    quiet,
+    selected_repos: List[Dict[str, Any]],
+    repositories_base_dir: str,
+    bin_dir: str,
+    all_repos: List[Dict[str, Any]],
+    no_verification: bool,
+    preview: bool,
+    quiet: bool,
     clone_mode: str,
     update_dependencies: bool,
-):
+) -> None:
     """
     Install repositories by creating symbolic links and processing standard
     manifest files (pkgmgr.yml, PKGBUILD, flake.nix, Ansible requirements,
-    Python manifests, Makefile).
+    Python manifests, Makefile) via dedicated installer components.
     """
     for repo in selected_repos:
-        repo_identifier = get_repo_identifier(repo, all_repos)
-        repo_dir = get_repo_dir(repositories_base_dir, repo)
-
-        if not os.path.exists(repo_dir):
-            print(f"Repository directory '{repo_dir}' does not exist. Cloning it now...")
-            # Pass the clone_mode parameter to clone_repos
-            clone_repos(
-                [repo],
-                repositories_base_dir,
-                all_repos,
-                preview,
-                no_verification,
-                clone_mode,
-            )
-            if not os.path.exists(repo_dir):
-                print(f"Cloning failed for repository {repo_identifier}. Skipping installation.")
-                continue
-
-        verified_info = repo.get("verified")
-        verified_ok, errors, commit_hash, signing_key = verify_repository(
-            repo,
-            repo_dir,
-            mode="local",
+        identifier = get_repo_identifier(repo, all_repos)
+        repo_dir = _ensure_repo_dir(
+            repo=repo,
+            repositories_base_dir=repositories_base_dir,
+            all_repos=all_repos,
+            preview=preview,
             no_verification=no_verification,
+            clone_mode=clone_mode,
+            identifier=identifier,
+        )
+        if not repo_dir:
+            continue
+
+        if not _verify_repo(
+            repo=repo,
+            repo_dir=repo_dir,
+            no_verification=no_verification,
+            identifier=identifier,
+        ):
+            continue
+
+        ctx = _create_context(
+            repo=repo,
+            identifier=identifier,
+            repo_dir=repo_dir,
+            repositories_base_dir=repositories_base_dir,
+            bin_dir=bin_dir,
+            all_repos=all_repos,
+            no_verification=no_verification,
+            preview=preview,
+            quiet=quiet,
+            clone_mode=clone_mode,
+            update_dependencies=update_dependencies,
         )
 
-        if not no_verification and verified_info and not verified_ok:
-            print(f"Warning: Verification failed for {repo_identifier}:")
-            for err in errors:
-                print(f"  - {err}")
-            choice = input("Proceed with installation? (y/N): ").strip().lower()
-            if choice != "y":
-                print(f"Skipping installation for {repo_identifier}.")
-                continue
-
-        # Create the symlink using create_ink.
+        # Create the symlink using create_ink before running installers.
         create_ink(
             repo,
             repositories_base_dir,
@@ -247,77 +207,7 @@ def install_repos(
             preview=preview,
         )
 
-        # 1) pkgmgr.yml (pkgmgr-internal manifest for other repositories)
-        _install_pkgmgr_dependencies_from_manifest(
-            repo_dir=repo_dir,
-            no_verification=no_verification,
-            update_dependencies=update_dependencies,
-            clone_mode=clone_mode,
-            preview=preview,
-        )
-
-        # 2) Arch: PKGBUILD (depends/makedepends)
-        _install_arch_dependencies_from_pkgbuild(repo_dir, preview=preview)
-
-        # 3) Nix: flake.nix
-        _install_nix_flake_profile(repo_dir, preview=preview)
-
-        # 4) Ansible: requirements.yml (only collections/roles)
-        req_file = os.path.join(repo_dir, "requirements.yml")
-        if os.path.exists(req_file):
-            try:
-                with open(req_file, "r", encoding="utf-8") as f:
-                    requirements = yaml.safe_load(f) or {}
-            except Exception as e:
-                print(f"Error loading requirements.yml in {repo_identifier}: {e}")
-                requirements = None
-
-            if requirements and isinstance(requirements, dict):
-                if "collections" in requirements or "roles" in requirements:
-                    print(f"Ansible dependencies found in {repo_identifier}, installing...")
-
-                    ansible_requirements = {}
-                    if "collections" in requirements:
-                        ansible_requirements["collections"] = requirements["collections"]
-                    if "roles" in requirements:
-                        ansible_requirements["roles"] = requirements["roles"]
-
-                    with tempfile.NamedTemporaryFile(
-                        mode="w",
-                        suffix=".yml",
-                        delete=False,
-                    ) as tmp:
-                        yaml.dump(ansible_requirements, tmp, default_flow_style=False)
-                        tmp_filename = tmp.name
-
-                    if "collections" in ansible_requirements:
-                        print(f"Ansible collections found in {repo_identifier}, installing...")
-                        cmd = f"ansible-galaxy collection install -r {tmp_filename}"
-                        run_command(cmd, cwd=repo_dir, preview=preview)
-
-                    if "roles" in ansible_requirements:
-                        print(f"Ansible roles found in {repo_identifier}, installing...")
-                        cmd = f"ansible-galaxy role install -r {tmp_filename}"
-                        run_command(cmd, cwd=repo_dir, preview=preview)
-
-        # 5) Python: pyproject.toml (modern) / requirements.txt (classic)
-        pyproject_path = os.path.join(repo_dir, "pyproject.toml")
-        if os.path.exists(pyproject_path):
-            print(f"pyproject.toml found in {repo_identifier}, installing Python project...")
-            cmd = "~/.venvs/pkgmgr/bin/pip install ."
-            run_command(cmd, cwd=repo_dir, preview=preview)
-
-        req_txt_file = os.path.join(repo_dir, "requirements.txt")
-        if os.path.exists(req_txt_file):
-            print(f"requirements.txt found in {repo_identifier}, installing Python dependencies...")
-            cmd = "~/.venvs/pkgmgr/bin/pip install -r requirements.txt"
-            run_command(cmd, cwd=repo_dir, preview=preview)
-
-        # 6) Makefile: make install (if present)
-        makefile_path = os.path.join(repo_dir, "Makefile")
-        if os.path.exists(makefile_path):
-            cmd = "make install"
-            try:
-                run_command(cmd, cwd=repo_dir, preview=preview)
-            except SystemExit as e:
-                print(f"[Warning] Failed to run '{cmd}' for {repo_identifier}: {e}")
+        # Run all installers that support this repository.
+        for installer in INSTALLERS:
+            if installer.supports(ctx):
+                installer.run(ctx)

pkgmgr/installers/__init__.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Installer package for pkgmgr.
+
+Each installer implements a small, focused step in the repository
+installation pipeline (e.g. PKGBUILD dependencies, Nix flakes, Python, etc.).
+"""

pkgmgr/installers/ansible_requirements.py

@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Installer for Ansible dependencies defined in requirements.yml.
+
+This installer installs collections and roles via ansible-galaxy when found.
+"""
+
+import os
+import tempfile
+from typing import Any, Dict
+
+import yaml
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.base import BaseInstaller
+from pkgmgr.run_command import run_command
+
+
+class AnsibleRequirementsInstaller(BaseInstaller):
+    """Install Ansible collections and roles from requirements.yml."""
+
+    REQUIREMENTS_FILE = "requirements.yml"
+
+    def supports(self, ctx: RepoContext) -> bool:
+        req_file = os.path.join(ctx.repo_dir, self.REQUIREMENTS_FILE)
+        return os.path.exists(req_file)
+
+    def _load_requirements(self, req_path: str, identifier: str) -> Dict[str, Any]:
+        try:
+            with open(req_path, "r", encoding="utf-8") as f:
+                return yaml.safe_load(f) or {}
+        except Exception as exc:
+            print(f"Error loading {self.REQUIREMENTS_FILE} in {identifier}: {exc}")
+            return {}
+
+    def run(self, ctx: RepoContext) -> None:
+        req_file = os.path.join(ctx.repo_dir, self.REQUIREMENTS_FILE)
+        requirements = self._load_requirements(req_file, ctx.identifier)
+        if not requirements or not isinstance(requirements, dict):
+            return
+
+        if "collections" not in requirements and "roles" not in requirements:
+            return
+
+        print(f"Ansible dependencies found in {ctx.identifier}, installing...")
+
+        ansible_requirements: Dict[str, Any] = {}
+        if "collections" in requirements:
+            ansible_requirements["collections"] = requirements["collections"]
+        if "roles" in requirements:
+            ansible_requirements["roles"] = requirements["roles"]
+
+        with tempfile.NamedTemporaryFile(
+            mode="w",
+            suffix=".yml",
+            delete=False,
+        ) as tmp:
+            yaml.dump(ansible_requirements, tmp, default_flow_style=False)
+            tmp_filename = tmp.name
+
+        if "collections" in ansible_requirements:
+            print(f"Ansible collections found in {ctx.identifier}, installing...")
+            cmd = f"ansible-galaxy collection install -r {tmp_filename}"
+            run_command(cmd, cwd=ctx.repo_dir, preview=ctx.preview)
+
+        if "roles" in ansible_requirements:
+            print(f"Ansible roles found in {ctx.identifier}, installing...")
+            cmd = f"ansible-galaxy role install -r {tmp_filename}"
+            run_command(cmd, cwd=ctx.repo_dir, preview=ctx.preview)

pkgmgr/installers/aur.py

@@ -0,0 +1,131 @@
+# pkgmgr/installers/aur.py
+
+import os
+import shutil
+import yaml
+from typing import List
+
+from pkgmgr.installers.base import BaseInstaller
+from pkgmgr.context import RepoContext
+from pkgmgr.run_command import run_command
+
+
+AUR_CONFIG_FILENAME = "aur.yml"
+
+
+class AurInstaller(BaseInstaller):
+    """
+    Installer for Arch AUR dependencies declared in an `aur.yml` file.
+
+    This installer is:
+      - Arch-only (requires `pacman`)
+      - optional helper-driven (yay/paru/..)
+      - safe to ignore on non-Arch systems
+    """
+
+    def _is_arch_like(self) -> bool:
+        return shutil.which("pacman") is not None
+
+    def _config_path(self, ctx: RepoContext) -> str:
+        return os.path.join(ctx.repo_dir, AUR_CONFIG_FILENAME)
+
+    def _load_config(self, ctx: RepoContext) -> dict:
+        path = self._config_path(ctx)
+        if not os.path.exists(path):
+            return {}
+
+        try:
+            with open(path, "r", encoding="utf-8") as f:
+                data = yaml.safe_load(f) or {}
+        except Exception as exc:
+            print(f"[Warning] Failed to load AUR config from '{path}': {exc}")
+            return {}
+
+        if not isinstance(data, dict):
+            print(f"[Warning] AUR config '{path}' is not a mapping. Ignoring.")
+            return {}
+
+        return data
+
+    def _get_helper(self, cfg: dict) -> str:
+        # Priority: config.helper > $AUR_HELPER > "yay"
+        helper = cfg.get("helper")
+        if isinstance(helper, str) and helper.strip():
+            return helper.strip()
+
+        env_helper = os.environ.get("AUR_HELPER")
+        if env_helper:
+            return env_helper.strip()
+
+        return "yay"
+
+    def _get_packages(self, cfg: dict) -> List[str]:
+        raw = cfg.get("packages", [])
+        if not isinstance(raw, list):
+            return []
+
+        names: List[str] = []
+        for entry in raw:
+            if isinstance(entry, str):
+                name = entry.strip()
+                if name:
+                    names.append(name)
+            elif isinstance(entry, dict):
+                name = str(entry.get("name", "")).strip()
+                if name:
+                    names.append(name)
+
+        return names
+
+    # --- BaseInstaller API -------------------------------------------------
+
+    def supports(self, ctx: RepoContext) -> bool:
+        """
+        This installer is supported if:
+          - We are on an Arch-like system (pacman available),
+          - An aur.yml exists,
+          - That aur.yml declares at least one package.
+        """
+        if not self._is_arch_like():
+            return False
+
+        cfg = self._load_config(ctx)
+        if not cfg:
+            return False
+
+        packages = self._get_packages(cfg)
+        return len(packages) > 0
+
+    def run(self, ctx: RepoContext) -> None:
+        """
+        Install AUR packages using the configured helper (default: yay).
+        """
+        if not self._is_arch_like():
+            print("AUR installer skipped: not an Arch-like system.")
+            return
+
+        cfg = self._load_config(ctx)
+        if not cfg:
+            print("AUR installer: no valid aur.yml found; skipping.")
+            return
+
+        packages = self._get_packages(cfg)
+        if not packages:
+            print("AUR installer: no AUR packages defined; skipping.")
+            return
+
+        helper = self._get_helper(cfg)
+        if shutil.which(helper) is None:
+            print(
+                f"[Warning] AUR helper '{helper}' is not available on PATH. "
+                f"Please install it (e.g. via your aur_builder setup). "
+                f"Skipping AUR installation."
+            )
+            return
+
+        pkg_list_str = " ".join(packages)
+        print(f"Installing AUR packages via '{helper}': {pkg_list_str}")
+
+        cmd = f"{helper} -S --noconfirm {pkg_list_str}"
+        # We respect preview mode to allow dry runs.
+        run_command(cmd, preview=ctx.preview)

pkgmgr/installers/base.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Base interface for all installer components in the pkgmgr installation pipeline.
+"""
+
+from abc import ABC, abstractmethod
+from pkgmgr.context import RepoContext
+
+
+class BaseInstaller(ABC):
+    """
+    A single step in the installation pipeline for a repository.
+
+    Implementations should be small and focused on one technology or manifest
+    type (e.g. PKGBUILD, Nix, Python, Ansible).
+    """
+
+    @abstractmethod
+    def supports(self, ctx: RepoContext) -> bool:
+        """
+        Return True if this installer should run for the given repository
+        context. This is typically based on file existence or platform checks.
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    def run(self, ctx: RepoContext) -> None:
+        """
+        Execute the installer logic for the given repository context.
+        Implementations may raise SystemExit via run_command() on errors.
+        """
+        raise NotImplementedError

pkgmgr/installers/makefile.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Installer that triggers `make install` if a Makefile is present.
+
+This is useful for repositories that expose a standard Makefile-based
+installation step.
+"""
+
+import os
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.base import BaseInstaller
+from pkgmgr.run_command import run_command
+
+
+class MakefileInstaller(BaseInstaller):
+    """Run `make install` if a Makefile exists in the repository."""
+
+    MAKEFILE_NAME = "Makefile"
+
+    def supports(self, ctx: RepoContext) -> bool:
+        makefile_path = os.path.join(ctx.repo_dir, self.MAKEFILE_NAME)
+        return os.path.exists(makefile_path)
+
+    def run(self, ctx: RepoContext) -> None:
+        cmd = "make install"
+        try:
+            run_command(cmd, cwd=ctx.repo_dir, preview=ctx.preview)
+        except SystemExit as exc:
+            print(f"[Warning] Failed to run '{cmd}' for {ctx.identifier}: {exc}")

pkgmgr/installers/nix_flake.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Installer for Nix flakes.
+
+If a repository contains flake.nix and the 'nix' command is available, this
+installer will try to install a profile output from the flake.
+"""
+
+import os
+import shutil
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.base import BaseInstaller
+from pkgmgr.run_command import run_command
+
+
+class NixFlakeInstaller(BaseInstaller):
+    """Install Nix flake profiles for repositories that define flake.nix."""
+
+    FLAKE_FILE = "flake.nix"
+
+    def supports(self, ctx: RepoContext) -> bool:
+        if shutil.which("nix") is None:
+            return False
+        flake_path = os.path.join(ctx.repo_dir, self.FLAKE_FILE)
+        return os.path.exists(flake_path)
+
+    def run(self, ctx: RepoContext) -> None:
+        flake_path = os.path.join(ctx.repo_dir, self.FLAKE_FILE)
+        if not os.path.exists(flake_path):
+            return
+
+        if shutil.which("nix") is None:
+            print("Warning: flake.nix found but 'nix' command not available. Skipping flake setup.")
+            return
+
+        print("Nix flake detected, attempting to install profile output...")
+        for output in ("pkgmgr", "default"):
+            cmd = f"nix profile install {ctx.repo_dir}#{output}"
+            try:
+                run_command(cmd, cwd=ctx.repo_dir, preview=ctx.preview)
+                print(f"Nix flake output '{output}' successfully installed.")
+            except SystemExit as e:
+                print(f"[Warning] Failed to install Nix flake output '{output}': {e}")
+

pkgmgr/installers/pkgbuild.py

@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Installer for Arch Linux dependencies defined in PKGBUILD files.
+
+This installer extracts depends/makedepends from PKGBUILD and installs them
+via pacman on Arch-based systems.
+"""
+
+import os
+import shutil
+import subprocess
+from typing import List
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.base import BaseInstaller
+from pkgmgr.run_command import run_command
+
+
+class PkgbuildInstaller(BaseInstaller):
+    """Install Arch dependencies (depends/makedepends) from PKGBUILD."""
+
+    PKGBUILD_NAME = "PKGBUILD"
+
+    def supports(self, ctx: RepoContext) -> bool:
+        if shutil.which("pacman") is None:
+            return False
+        pkgbuild_path = os.path.join(ctx.repo_dir, self.PKGBUILD_NAME)
+        return os.path.exists(pkgbuild_path)
+
+    def _extract_pkgbuild_array(self, ctx: RepoContext, var_name: str) -> List[str]:
+        """
+        Extract a Bash array (depends/makedepends) from PKGBUILD using bash itself.
+        Returns a list of package names or an empty list on error.
+
+        Uses a minimal shell environment (no profile/rc) to avoid noise from MOTD
+        or interactive shell banners polluting the output.
+        """
+        pkgbuild_path = os.path.join(ctx.repo_dir, self.PKGBUILD_NAME)
+        if not os.path.exists(pkgbuild_path):
+            return []
+
+        script = f'source {self.PKGBUILD_NAME} >/dev/null 2>&1; printf "%s\\n" "${{{var_name}[@]}}"'
+        try:
+            output = subprocess.check_output(
+                ["bash", "--noprofile", "--norc", "-c", script],
+                cwd=ctx.repo_dir,
+                text=True,
+            )
+        except Exception:
+            return []
+
+        packages: List[str] = []
+        for line in output.splitlines():
+            line = line.strip()
+            if not line:
+                continue
+            packages.append(line)
+        return packages
+
+    def run(self, ctx: RepoContext) -> None:
+        depends = self._extract_pkgbuild_array(ctx, "depends")
+        makedepends = self._extract_pkgbuild_array(ctx, "makedepends")
+        all_pkgs = depends + makedepends
+
+        if not all_pkgs:
+            return
+
+        cmd = "sudo pacman -S --noconfirm " + " ".join(all_pkgs)
+        run_command(cmd, preview=ctx.preview)

pkgmgr/installers/pkgmgr_manifest.py

@@ -0,0 +1,114 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Installer for pkgmgr.yml manifest dependencies.
+
+This installer reads pkgmgr.yml (if present) and installs referenced pkgmgr
+repository dependencies via pkgmgr itself.
+"""
+
+import os
+from typing import Any, Dict, List
+
+import yaml
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.base import BaseInstaller
+from pkgmgr.run_command import run_command
+
+
+class PkgmgrManifestInstaller(BaseInstaller):
+    """Install pkgmgr-defined repository dependencies from pkgmgr.yml."""
+
+    MANIFEST_NAME = "pkgmgr.yml"
+
+    def supports(self, ctx: RepoContext) -> bool:
+        manifest_path = os.path.join(ctx.repo_dir, self.MANIFEST_NAME)
+        return os.path.exists(manifest_path)
+
+    def _load_manifest(self, manifest_path: str) -> Dict[str, Any]:
+        try:
+            with open(manifest_path, "r", encoding="utf-8") as f:
+                return yaml.safe_load(f) or {}
+        except Exception as exc:
+            print(f"Error loading {self.MANIFEST_NAME} in '{manifest_path}': {exc}")
+            return {}
+
+    def _collect_dependency_ids(self, dependencies: List[Dict[str, Any]]) -> List[str]:
+        ids: List[str] = []
+        for dep in dependencies:
+            if not isinstance(dep, dict):
+                continue
+            repo_id = dep.get("repository")
+            if repo_id:
+                ids.append(str(repo_id))
+        return ids
+
+    def run(self, ctx: RepoContext) -> None:
+        manifest_path = os.path.join(ctx.repo_dir, self.MANIFEST_NAME)
+        manifest = self._load_manifest(manifest_path)
+        if not manifest:
+            return
+
+        dependencies = manifest.get("dependencies", []) or []
+        if not isinstance(dependencies, list) or not dependencies:
+            return
+
+        author = manifest.get("author")
+        url = manifest.get("url")
+        description = manifest.get("description")
+
+        if not ctx.preview:
+            print("pkgmgr manifest detected:")
+            if author:
+                print(f"  author: {author}")
+            if url:
+                print(f"  url: {url}")
+            if description:
+                print(f"  description: {description}")
+
+        dep_repo_ids = self._collect_dependency_ids(dependencies)
+
+        if ctx.update_dependencies and dep_repo_ids:
+            cmd_pull = "pkgmgr pull " + " ".join(dep_repo_ids)
+            try:
+                run_command(cmd_pull, preview=ctx.preview)
+            except SystemExit as exc:
+                print(f"Warning: 'pkgmgr pull' for dependencies failed (exit code {exc}).")
+
+        # Install dependencies one by one
+        for dep in dependencies:
+            if not isinstance(dep, dict):
+                continue
+
+            repo_id = dep.get("repository")
+            if not repo_id:
+                continue
+
+            version = dep.get("version")
+            reason = dep.get("reason")
+
+            if reason and not ctx.preview:
+                print(f"Installing dependency {repo_id}: {reason}")
+            else:
+                print(f"Installing dependency {repo_id}...")
+
+            cmd = f"pkgmgr install {repo_id}"
+
+            if version:
+                cmd += f" --version {version}"
+
+            if ctx.no_verification:
+                cmd += " --no-verification"
+
+            if ctx.update_dependencies:
+                cmd += " --dependencies"
+
+            if ctx.clone_mode:
+                cmd += f" --clone-mode {ctx.clone_mode}"
+
+            try:
+                run_command(cmd, preview=ctx.preview)
+            except SystemExit as exc:
+                print(f"[Warning] Failed to install dependency '{repo_id}': {exc}")

pkgmgr/installers/python.py

@@ -0,0 +1,89 @@
+import os
+import sys
+
+from .base import BaseInstaller
+from pkgmgr.run_command import run_command
+
+
+class PythonInstaller(BaseInstaller):
+    """
+    Install Python projects based on pyproject.toml and/or requirements.txt.
+
+    Strategy:
+      - Determine a pip command in this order:
+          1. $PKGMGR_PIP (explicit override, e.g. ~/.venvs/pkgmgr/bin/pip)
+          2. sys.executable -m pip (current interpreter)
+          3. "pip" from PATH as last resort
+      - If pyproject.toml exists: pip install .
+      - If requirements.txt exists: pip install -r requirements.txt
+    """
+
+    name = "python"
+
+    def supports(self, ctx) -> bool:
+        """
+        Return True if this installer should handle the given repository.
+
+        ctx must provide:
+          - repo_dir: filesystem path to the repository
+        """
+        repo_dir = ctx.repo_dir
+        return (
+            os.path.exists(os.path.join(repo_dir, "pyproject.toml"))
+            or os.path.exists(os.path.join(repo_dir, "requirements.txt"))
+        )
+
+    def _pip_cmd(self) -> str:
+        """
+        Resolve the pip command to use.
+        """
+        # 1) Explicit override via environment variable
+        explicit = os.environ.get("PKGMGR_PIP", "").strip()
+        if explicit:
+            return explicit
+
+        # 2) Current Python interpreter (works well in Nix/dev shells)
+        if sys.executable:
+            return f"{sys.executable} -m pip"
+
+        # 3) Fallback to plain pip
+        return "pip"
+
+    def run(self, ctx) -> None:
+        """
+        ctx must provide:
+          - repo_dir: path to repository
+          - identifier: human readable name
+          - preview: bool
+        """
+        pip_cmd = self._pip_cmd()
+
+        pyproject = os.path.join(ctx.repo_dir, "pyproject.toml")
+        if os.path.exists(pyproject):
+            print(
+                f"pyproject.toml found in {ctx.identifier}, "
+                f"installing Python project..."
+            )
+            cmd = f"{pip_cmd} install ."
+            try:
+                run_command(cmd, cwd=ctx.repo_dir, preview=ctx.preview)
+            except SystemExit as exc:
+                print(
+                    f"[Warning] Failed to install Python project in {ctx.identifier}: {exc}"
+                )
+
+        req_txt = os.path.join(ctx.repo_dir, "requirements.txt")
+        if os.path.exists(req_txt):
+            print(
+                f"requirements.txt found in {ctx.identifier}, "
+                f"installing Python dependencies..."
+            )
+            cmd = f"{pip_cmd} install -r requirements.txt"
+            try:
+                run_command(cmd, cwd=ctx.repo_dir, preview=ctx.preview)
+            except SystemExit as exc:
+                print(
+                    f"[Warning] Failed to install Python dependencies in {ctx.identifier}: {exc}"
+                )
+
+

tests/integration/deactivated_test_integration_install_all_shallow.py

@@ -1,4 +1,3 @@
-# tests/test_integration_install_all_shallow.py
 """
 Integration test: install all configured repositories using
 --clone-mode shallow (HTTPS shallow clone) and --no-verification.

tests/test_install_repos.py

@@ -1,129 +0,0 @@
-# tests/test_install_repos.py
-import os
-import unittest
-from unittest.mock import patch, MagicMock, mock_open
-
-from pkgmgr.install_repos import install_repos
-
-
-class TestInstallRepos(unittest.TestCase):
-    def setUp(self):
-        self.repo = {
-            "provider": "github.com",
-            "account": "user",
-            "repository": "repo",
-        }
-        self.selected = [self.repo]
-        self.base_dir = "/tmp/repos"
-        self.bin_dir = "/tmp/bin"
-        self.all_repos = self.selected
-
-    @patch("pkgmgr.install_repos.clone_repos")
-    @patch("pkgmgr.install_repos.os.path.exists")
-    @patch("pkgmgr.install_repos.get_repo_dir")
-    @patch("pkgmgr.install_repos.get_repo_identifier")
-    def test_calls_clone_repos_with_clone_mode(
-        self,
-        mock_get_repo_identifier,
-        mock_get_repo_dir,
-        mock_exists,
-        mock_clone_repos,
-    ):
-        mock_get_repo_identifier.return_value = "github.com/user/repo"
-        mock_get_repo_dir.return_value = "/tmp/repos/user/repo"
-        # Repo-Verzeichnis existiert nicht -> soll geklont werden
-        mock_exists.return_value = False
-
-        install_repos(
-            self.selected,
-            self.base_dir,
-            self.bin_dir,
-            self.all_repos,
-            no_verification=True,
-            preview=False,
-            quiet=True,
-            clone_mode="shallow",
-            update_dependencies=False,
-        )
-
-        mock_clone_repos.assert_called_once()
-        args, kwargs = mock_clone_repos.call_args
-        # clone_mode ist letztes Argument
-        self.assertEqual(args[-1], "shallow")
-
-    @patch("pkgmgr.install_repos.run_command")
-    @patch("pkgmgr.install_repos.open", new_callable=mock_open, create=True)
-    @patch("pkgmgr.install_repos.yaml.safe_load")
-    @patch("pkgmgr.install_repos.os.path.exists")
-    @patch("pkgmgr.install_repos.create_ink")
-    @patch("pkgmgr.install_repos.verify_repository")
-    @patch("pkgmgr.install_repos.get_repo_dir")
-    @patch("pkgmgr.install_repos.get_repo_identifier")
-    def test_pkgmgr_requirements_propagate_clone_mode(
-        self,
-        mock_get_repo_identifier,
-        mock_get_repo_dir,
-        mock_verify,
-        mock_create_ink,
-        mock_exists,
-        mock_safe_load,
-        mock_open_file,
-        mock_run_command,
-    ):
-        mock_get_repo_identifier.return_value = "github.com/user/repo"
-        repo_dir = "/tmp/repos/user/repo"
-        mock_get_repo_dir.return_value = repo_dir
-
-        # exists() muss True für repo_dir & requirements.yml liefern,
-        # sonst werden die Anforderungen nie verarbeitet.
-        def exists_side_effect(path):
-            if path == repo_dir:
-                return True
-            if path == os.path.join(repo_dir, "requirements.yml"):
-                return True
-            # requirements.txt und Makefile sollen "nicht existieren"
-            return False
-
-        mock_exists.side_effect = exists_side_effect
-
-        mock_verify.return_value = (True, [], "hash", "key")
-
-        # requirements.yml enthält pkgmgr-Dependencies
-        mock_safe_load.return_value = {
-            "pkgmgr": ["github.com/other/account/dep"],
-        }
-
-        commands = []
-
-        def run_command_side_effect(cmd, cwd=None, preview=False):
-            commands.append((cmd, cwd, preview))
-
-        mock_run_command.side_effect = run_command_side_effect
-
-        install_repos(
-            self.selected,
-            self.base_dir,
-            self.bin_dir,
-            self.all_repos,
-            no_verification=False,
-            preview=False,
-            quiet=True,
-            clone_mode="shallow",
-            update_dependencies=False,
-        )
-
-        # Prüfen, dass ein pkgmgr install Befehl mit --clone-mode shallow gebaut wurde
-        pkgmgr_install_cmds = [
-            c for (c, cwd, preview) in commands if "pkgmgr install" in c
-        ]
-        self.assertTrue(
-            pkgmgr_install_cmds,
-            f"No pkgmgr install command was executed. Commands seen: {commands}",
-        )
-
-        cmd = pkgmgr_install_cmds[0]
-        self.assertIn("--clone-mode shallow", cmd)
-
-
-if __name__ == "__main__":
-    unittest.main()

tests/test_main.py

@@ -1,19 +0,0 @@
-# tests/test_main.py
-import unittest
-import main
-
-
-class TestMainModule(unittest.TestCase):
-    def test_proxy_commands_defined(self):
-        """
-        Basic sanity check: main.py should define PROXY_COMMANDS
-        with git/docker/docker compose entries.
-        """
-        self.assertTrue(hasattr(main, "PROXY_COMMANDS"))
-        self.assertIn("git", main.PROXY_COMMANDS)
-        self.assertIn("docker", main.PROXY_COMMANDS)
-        self.assertIn("docker compose", main.PROXY_COMMANDS)
-
-
-if __name__ == "__main__":
-    unittest.main()

tests/unit/pkgmgr/installers/test_ansible_requirements.py

@@ -0,0 +1,71 @@
+# tests/unit/pkgmgr/installers/test_ansible_requirements.py
+
+import os
+import unittest
+from unittest.mock import patch, mock_open
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.ansible_requirements import AnsibleRequirementsInstaller
+
+
+class TestAnsibleRequirementsInstaller(unittest.TestCase):
+    def setUp(self):
+        self.repo = {"name": "test-repo"}
+        self.ctx = RepoContext(
+            repo=self.repo,
+            identifier="test-id",
+            repo_dir="/tmp/repo",
+            repositories_base_dir="/tmp",
+            bin_dir="/bin",
+            all_repos=[self.repo],
+            no_verification=False,
+            preview=False,
+            quiet=False,
+            clone_mode="ssh",
+            update_dependencies=False,
+        )
+        self.installer = AnsibleRequirementsInstaller()
+
+    @patch("os.path.exists", return_value=True)
+    def test_supports_true_when_requirements_exist(self, mock_exists):
+        self.assertTrue(self.installer.supports(self.ctx))
+        mock_exists.assert_called_with(os.path.join(self.ctx.repo_dir, "requirements.yml"))
+
+    @patch("os.path.exists", return_value=False)
+    def test_supports_false_when_requirements_missing(self, mock_exists):
+        self.assertFalse(self.installer.supports(self.ctx))
+
+    @patch("pkgmgr.installers.ansible_requirements.run_command")
+    @patch("tempfile.NamedTemporaryFile")
+    @patch(
+        "builtins.open",
+        new_callable=mock_open,
+        read_data="""
+collections:
+  - name: community.docker
+roles:
+  - src: geerlingguy.docker
+""",
+    )
+    @patch("os.path.exists", return_value=True)
+    def test_run_installs_collections_and_roles(
+        self, mock_exists, mock_file, mock_tmp, mock_run_command
+    ):
+        # Fake temp file name
+        mock_tmp().__enter__().name = "/tmp/req.yml"
+
+        self.installer.run(self.ctx)
+
+        cmds = [call[0][0] for call in mock_run_command.call_args_list]
+        self.assertIn(
+            "ansible-galaxy collection install -r /tmp/req.yml",
+            cmds,
+        )
+        self.assertIn(
+            "ansible-galaxy role install -r /tmp/req.yml",
+            cmds,
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/installers/test_aur.py

@@ -0,0 +1,97 @@
+# tests/unit/pkgmgr/installers/test_aur.py
+
+import os
+import unittest
+from unittest.mock import patch, mock_open
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.aur import AurInstaller, AUR_CONFIG_FILENAME
+
+
+class TestAurInstaller(unittest.TestCase):
+    def setUp(self):
+        self.repo = {"name": "test-repo"}
+        self.ctx = RepoContext(
+            repo=self.repo,
+            identifier="test-id",
+            repo_dir="/tmp/repo",
+            repositories_base_dir="/tmp",
+            bin_dir="/bin",
+            all_repos=[self.repo],
+            no_verification=False,
+            preview=False,
+            quiet=False,
+            clone_mode="ssh",
+            update_dependencies=False,
+        )
+        self.installer = AurInstaller()
+
+    @patch("shutil.which", return_value="/usr/bin/pacman")
+    @patch("os.path.exists", return_value=True)
+    @patch(
+        "builtins.open",
+        new_callable=mock_open,
+        read_data="""
+helper: yay
+packages:
+  - aurutils
+  - name: some-aur-only-tool
+    reason: "Test tool"
+""",
+    )
+    def test_supports_true_when_arch_and_aur_config_present(
+        self, mock_file, mock_exists, mock_which
+    ):
+        self.assertTrue(self.installer.supports(self.ctx))
+        mock_which.assert_called_with("pacman")
+        mock_exists.assert_called_with(os.path.join(self.ctx.repo_dir, AUR_CONFIG_FILENAME))
+
+    @patch("shutil.which", return_value=None)
+    def test_supports_false_when_not_arch(self, mock_which):
+        self.assertFalse(self.installer.supports(self.ctx))
+
+    @patch("shutil.which", return_value="/usr/bin/pacman")
+    @patch("os.path.exists", return_value=False)
+    def test_supports_false_when_no_config(self, mock_exists, mock_which):
+        self.assertFalse(self.installer.supports(self.ctx))
+
+    @patch("shutil.which", side_effect=lambda name: "/usr/bin/pacman" if name == "pacman" else "/usr/bin/yay")
+    @patch("pkgmgr.installers.aur.run_command")
+    @patch(
+        "builtins.open",
+        new_callable=mock_open,
+        read_data="""
+helper: yay
+packages:
+  - aurutils
+  - some-aur-only-tool
+""",
+    )
+    @patch("os.path.exists", return_value=True)
+    def test_run_installs_packages_with_helper(
+        self, mock_exists, mock_file, mock_run_command, mock_which
+    ):
+        self.installer.run(self.ctx)
+
+        cmd = mock_run_command.call_args[0][0]
+        self.assertTrue(cmd.startswith("yay -S --noconfirm "))
+        self.assertIn("aurutils", cmd)
+        self.assertIn("some-aur-only-tool", cmd)
+
+    @patch("shutil.which", return_value="/usr/bin/pacman")
+    @patch(
+        "builtins.open",
+        new_callable=mock_open,
+        read_data="packages: []",
+    )
+    @patch("os.path.exists", return_value=True)
+    def test_run_skips_when_no_packages(
+        self, mock_exists, mock_file, mock_which
+    ):
+        with patch("pkgmgr.installers.aur.run_command") as mock_run_command:
+            self.installer.run(self.ctx)
+            mock_run_command.assert_not_called()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/installers/test_base.py

@@ -0,0 +1,43 @@
+# tests/unit/pkgmgr/installers/test_base.py
+
+import unittest
+from pkgmgr.installers.base import BaseInstaller
+from pkgmgr.context import RepoContext
+
+
+class DummyInstaller(BaseInstaller):
+    def __init__(self, supports_value: bool = True):
+        self._supports_value = supports_value
+        self.ran_with = None
+
+    def supports(self, ctx: RepoContext) -> bool:
+        return self._supports_value
+
+    def run(self, ctx: RepoContext) -> None:
+        self.ran_with = ctx
+
+
+class TestBaseInstaller(unittest.TestCase):
+    def test_dummy_installer_supports_and_run(self):
+        ctx = RepoContext(
+            repo={},
+            identifier="id",
+            repo_dir="/tmp/repo",
+            repositories_base_dir="/tmp",
+            bin_dir="/bin",
+            all_repos=[],
+            no_verification=False,
+            preview=False,
+            quiet=False,
+            clone_mode="ssh",
+            update_dependencies=False,
+        )
+        inst = DummyInstaller(supports_value=True)
+        self.assertTrue(inst.supports(ctx))
+        self.assertIsNone(inst.ran_with)
+        inst.run(ctx)
+        self.assertIs(inst.ran_with, ctx)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/installers/test_makefile_installer.py

@@ -0,0 +1,51 @@
+# tests/unit/pkgmgr/installers/test_makefile_installer.py
+
+import os
+import unittest
+from unittest.mock import patch
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.makefile import MakefileInstaller
+
+
+class TestMakefileInstaller(unittest.TestCase):
+    def setUp(self):
+        self.repo = {"name": "test-repo"}
+        self.ctx = RepoContext(
+            repo=self.repo,
+            identifier="test-id",
+            repo_dir="/tmp/repo",
+            repositories_base_dir="/tmp",
+            bin_dir="/bin",
+            all_repos=[self.repo],
+            no_verification=False,
+            preview=False,
+            quiet=False,
+            clone_mode="ssh",
+            update_dependencies=False,
+        )
+        self.installer = MakefileInstaller()
+
+    @patch("os.path.exists", return_value=True)
+    def test_supports_true_when_makefile_exists(self, mock_exists):
+        self.assertTrue(self.installer.supports(self.ctx))
+        mock_exists.assert_called_with(os.path.join(self.ctx.repo_dir, "Makefile"))
+
+    @patch("os.path.exists", return_value=False)
+    def test_supports_false_when_makefile_missing(self, mock_exists):
+        self.assertFalse(self.installer.supports(self.ctx))
+
+    @patch("pkgmgr.installers.makefile.run_command")
+    @patch("os.path.exists", return_value=True)
+    def test_run_executes_make_install(self, mock_exists, mock_run_command):
+        self.installer.run(self.ctx)
+        cmd = mock_run_command.call_args[0][0]
+        self.assertEqual(cmd, "make install")
+        self.assertEqual(
+            mock_run_command.call_args[1].get("cwd"),
+            self.ctx.repo_dir,
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/installers/test_nix_flake.py

@@ -0,0 +1,64 @@
+import os
+import unittest
+from unittest import mock
+from unittest.mock import patch
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.nix_flake import NixFlakeInstaller
+
+
+class TestNixFlakeInstaller(unittest.TestCase):
+    def setUp(self):
+        self.repo = {"name": "test-repo"}
+        self.ctx = RepoContext(
+            repo=self.repo,
+            identifier="test-id",
+            repo_dir="/tmp/repo",
+            repositories_base_dir="/tmp",
+            bin_dir="/bin",
+            all_repos=[self.repo],
+            no_verification=False,
+            preview=False,
+            quiet=False,
+            clone_mode="ssh",
+            update_dependencies=False,
+        )
+        self.installer = NixFlakeInstaller()
+
+    @patch("shutil.which", return_value="/usr/bin/nix")
+    @patch("os.path.exists", return_value=True)
+    def test_supports_true_when_nix_and_flake_exist(self, mock_exists, mock_which):
+        self.assertTrue(self.installer.supports(self.ctx))
+        mock_which.assert_called_with("nix")
+        mock_exists.assert_called_with(os.path.join(self.ctx.repo_dir, "flake.nix"))
+
+    @patch("shutil.which", return_value=None)
+    @patch("os.path.exists", return_value=True)
+    def test_supports_false_when_nix_missing(self, mock_exists, mock_which):
+        self.assertFalse(self.installer.supports(self.ctx))
+
+    @patch("os.path.exists", return_value=True)
+    @patch("shutil.which", return_value="/usr/bin/nix")
+    @mock.patch("pkgmgr.installers.nix_flake.run_command")
+    def test_run_tries_pkgmgr_then_default(self, mock_run_command, mock_which, mock_exists):
+        cmds = []
+
+        def side_effect(cmd, cwd=None, preview=False, *args, **kwargs):
+            cmds.append(cmd)
+            return None
+
+        mock_run_command.side_effect = side_effect
+
+        self.installer.run(self.ctx)
+
+        self.assertIn(
+            f"nix profile install {self.ctx.repo_dir}#pkgmgr",
+            cmds,
+        )
+        self.assertIn(
+            f"nix profile install {self.ctx.repo_dir}#default",
+            cmds,
+        )
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/installers/test_pkgbuild.py

@@ -0,0 +1,65 @@
+# tests/unit/pkgmgr/installers/test_pkgbuild.py
+
+import os
+import unittest
+from unittest.mock import patch
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.pkgbuild import PkgbuildInstaller
+
+
+class TestPkgbuildInstaller(unittest.TestCase):
+    def setUp(self):
+        self.repo = {"name": "test-repo"}
+        self.ctx = RepoContext(
+            repo=self.repo,
+            identifier="test-id",
+            repo_dir="/tmp/repo",
+            repositories_base_dir="/tmp",
+            bin_dir="/bin",
+            all_repos=[self.repo],
+            no_verification=False,
+            preview=False,
+            quiet=False,
+            clone_mode="ssh",
+            update_dependencies=False,
+        )
+        self.installer = PkgbuildInstaller()
+
+    @patch("os.path.exists", return_value=True)
+    @patch("shutil.which", return_value="/usr/bin/pacman")
+    def test_supports_true_when_pacman_and_pkgbuild_exist(self, mock_which, mock_exists):
+        self.assertTrue(self.installer.supports(self.ctx))
+        mock_which.assert_called_with("pacman")
+        mock_exists.assert_called_with(os.path.join(self.ctx.repo_dir, "PKGBUILD"))
+
+    @patch("os.path.exists", return_value=False)
+    @patch("shutil.which", return_value="/usr/bin/pacman")
+    def test_supports_false_when_pkgbuild_missing(self, mock_which, mock_exists):
+        self.assertFalse(self.installer.supports(self.ctx))
+
+    @patch("pkgmgr.installers.pkgbuild.run_command")
+    @patch("subprocess.check_output", return_value="python\ngit\n")
+    @patch("os.path.exists", return_value=True)
+    @patch("shutil.which", return_value="/usr/bin/pacman")
+    def test_run_installs_all_packages_and_uses_clean_bash(
+        self, mock_which, mock_exists, mock_check_output, mock_run_command
+    ):
+        self.installer.run(self.ctx)
+
+        # Check subprocess.check_output arguments (clean shell)
+        args, kwargs = mock_check_output.call_args
+        cmd_list = args[0]
+        self.assertEqual(cmd_list[0], "bash")
+        self.assertIn("--noprofile", cmd_list)
+        self.assertIn("--norc", cmd_list)
+
+        # Check that pacman is called with the extracted packages
+        cmd = mock_run_command.call_args[0][0]
+        self.assertTrue(cmd.startswith("sudo pacman -S --noconfirm "))
+        self.assertIn("python", cmd)
+        self.assertIn("git", cmd)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/installers/test_pkgmgr_manifest.py

@@ -0,0 +1,87 @@
+# tests/unit/pkgmgr/installers/test_pkgmgr_manifest.py
+
+import os
+import unittest
+from unittest.mock import patch, mock_open
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.pkgmgr_manifest import PkgmgrManifestInstaller
+
+
+class TestPkgmgrManifestInstaller(unittest.TestCase):
+    def setUp(self):
+        self.repo = {"name": "test-repo"}
+        self.ctx = RepoContext(
+            repo=self.repo,
+            identifier="test-id",
+            repo_dir="/tmp/repo",
+            repositories_base_dir="/tmp",
+            bin_dir="/bin",
+            all_repos=[self.repo],
+            no_verification=False,
+            preview=False,
+            quiet=False,
+            clone_mode="ssh",
+            update_dependencies=True,
+        )
+        self.installer = PkgmgrManifestInstaller()
+
+    @patch("os.path.exists", return_value=True)
+    def test_supports_true_when_manifest_exists(self, mock_exists):
+        self.assertTrue(self.installer.supports(self.ctx))
+        manifest_path = os.path.join(self.ctx.repo_dir, "pkgmgr.yml")
+        mock_exists.assert_called_with(manifest_path)
+
+    @patch("os.path.exists", return_value=False)
+    def test_supports_false_when_manifest_missing(self, mock_exists):
+        self.assertFalse(self.installer.supports(self.ctx))
+
+    @patch("pkgmgr.installers.pkgmgr_manifest.run_command")
+    @patch("builtins.open", new_callable=mock_open, read_data="""
+version: 1
+author: "Kevin"
+url: "https://example.com"
+description: "Test repo"
+dependencies:
+  - repository: github:user/repo1
+    version: main
+    reason: "Core dependency"
+  - repository: github:user/repo2
+""")
+    @patch("os.path.exists", return_value=True)
+    def test_run_installs_dependencies_and_pulls_when_update_enabled(
+        self, mock_exists, mock_file, mock_run_command
+    ):
+        self.installer.run(self.ctx)
+
+        # First call: pkgmgr pull github:user/repo1 github:user/repo2
+        # Then calls to pkgmgr install ...
+        cmds = [call_args[0][0] for call_args in mock_run_command.call_args_list]
+
+        self.assertIn(
+            "pkgmgr pull github:user/repo1 github:user/repo2",
+            cmds,
+        )
+        self.assertIn(
+            "pkgmgr install github:user/repo1 --version main --dependencies --clone-mode ssh",
+            cmds,
+        )
+        # For repo2: no version but dependencies + clone_mode
+        self.assertIn(
+            "pkgmgr install github:user/repo2 --dependencies --clone-mode ssh",
+            cmds,
+        )
+
+    @patch("pkgmgr.installers.pkgmgr_manifest.run_command")
+    @patch("builtins.open", new_callable=mock_open, read_data="{}")
+    @patch("os.path.exists", return_value=True)
+    def test_run_no_dependencies_no_command_called(
+        self, mock_exists, mock_file, mock_run_command
+    ):
+        self.ctx.update_dependencies = True
+        self.installer.run(self.ctx)
+        mock_run_command.assert_not_called()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/installers/test_python_installer.py

@@ -0,0 +1,71 @@
+# tests/unit/pkgmgr/installers/test_python_installer.py
+
+import os
+import unittest
+from unittest.mock import patch
+
+from pkgmgr.context import RepoContext
+from pkgmgr.installers.python import PythonInstaller
+
+
+class TestPythonInstaller(unittest.TestCase):
+    def setUp(self):
+        self.repo = {"name": "test-repo"}
+        self.ctx = RepoContext(
+            repo=self.repo,
+            identifier="test-id",
+            repo_dir="/tmp/repo",
+            repositories_base_dir="/tmp",
+            bin_dir="/bin",
+            all_repos=[self.repo],
+            no_verification=False,
+            preview=False,
+            quiet=False,
+            clone_mode="ssh",
+            update_dependencies=False,
+        )
+        self.installer = PythonInstaller()
+
+    @patch("os.path.exists", side_effect=lambda path: path.endswith("pyproject.toml"))
+    def test_supports_true_when_pyproject_exists(self, mock_exists):
+        self.assertTrue(self.installer.supports(self.ctx))
+
+    @patch("os.path.exists", side_effect=lambda path: path.endswith("requirements.txt"))
+    def test_supports_true_when_requirements_exists(self, mock_exists):
+        self.assertTrue(self.installer.supports(self.ctx))
+
+    @patch("os.path.exists", return_value=False)
+    def test_supports_false_when_no_python_files(self, mock_exists):
+        self.assertFalse(self.installer.supports(self.ctx))
+
+    @patch("pkgmgr.installers.python.run_command")
+    @patch(
+        "os.path.exists",
+        side_effect=lambda path: path.endswith("pyproject.toml")
+    )
+    def test_run_installs_project_from_pyproject(self, mock_exists, mock_run_command):
+        self.installer.run(self.ctx)
+        cmd = mock_run_command.call_args[0][0]
+        self.assertIn("pip install .", cmd)
+        self.assertEqual(
+            mock_run_command.call_args[1].get("cwd"),
+            self.ctx.repo_dir,
+        )
+
+    @patch("pkgmgr.installers.python.run_command")
+    @patch(
+        "os.path.exists",
+        side_effect=lambda path: path.endswith("requirements.txt")
+    )
+    def test_run_installs_dependencies_from_requirements(self, mock_exists, mock_run_command):
+        self.installer.run(self.ctx)
+        cmd = mock_run_command.call_args[0][0]
+        self.assertIn("pip install -r requirements.txt", cmd)
+        self.assertEqual(
+            mock_run_command.call_args[1].get("cwd"),
+            self.ctx.repo_dir,
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/test_context.py

@@ -0,0 +1,36 @@
+import unittest
+from pkgmgr.context import RepoContext
+
+
+class TestRepoContext(unittest.TestCase):
+    def test_repo_context_fields_are_stored(self):
+        repo = {"name": "test-repo"}
+        ctx = RepoContext(
+            repo=repo,
+            identifier="test-id",
+            repo_dir="/tmp/test",
+            repositories_base_dir="/tmp",
+            bin_dir="/usr/local/bin",
+            all_repos=[repo],
+            no_verification=True,
+            preview=False,
+            quiet=True,
+            clone_mode="ssh",
+            update_dependencies=True,
+        )
+
+        self.assertEqual(ctx.repo, repo)
+        self.assertEqual(ctx.identifier, "test-id")
+        self.assertEqual(ctx.repo_dir, "/tmp/test")
+        self.assertEqual(ctx.repositories_base_dir, "/tmp")
+        self.assertEqual(ctx.bin_dir, "/usr/local/bin")
+        self.assertEqual(ctx.all_repos, [repo])
+        self.assertTrue(ctx.no_verification)
+        self.assertFalse(ctx.preview)
+        self.assertTrue(ctx.quiet)
+        self.assertEqual(ctx.clone_mode, "ssh")
+        self.assertTrue(ctx.update_dependencies)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/test_install_repos.py

@@ -0,0 +1,122 @@
+from pkgmgr.run_command import run_command
+import unittest
+from unittest.mock import patch, MagicMock
+
+from pkgmgr.context import RepoContext
+import pkgmgr.install_repos as install_module
+
+
+class DummyInstaller:
+    """Simple installer for testing orchestration."""
+    def __init__(self):
+        self.calls = []
+
+    def supports(self, ctx: RepoContext) -> bool:
+        # Always support to verify that the pipeline runs
+        return True
+
+    def run(self, ctx: RepoContext) -> None:
+        self.calls.append(ctx.identifier)
+
+
+class TestInstallReposOrchestration(unittest.TestCase):
+    @patch("pkgmgr.install_repos.create_ink")
+    @patch("pkgmgr.install_repos.verify_repository")
+    @patch("pkgmgr.install_repos.get_repo_dir")
+    @patch("pkgmgr.install_repos.get_repo_identifier")
+    @patch("pkgmgr.install_repos.clone_repos")
+    def test_install_repos_runs_pipeline_for_each_repo(
+        self,
+        mock_clone_repos,
+        mock_get_repo_identifier,
+        mock_get_repo_dir,
+        mock_verify_repository,
+        mock_create_ink,
+    ):
+        repo1 = {"name": "repo1"}
+        repo2 = {"name": "repo2"}
+        selected_repos = [repo1, repo2]
+        all_repos = selected_repos
+
+        # Return identifiers and directories
+        mock_get_repo_identifier.side_effect = ["id1", "id2"]
+        mock_get_repo_dir.side_effect = ["/tmp/repo1", "/tmp/repo2"]
+
+        # Simulate verification success: (ok, errors, commit, key)
+        mock_verify_repository.return_value = (True, [], "commit", "key")
+
+        # Ensure directories exist (no cloning)
+        with patch("os.path.exists", return_value=True):
+            dummy_installer = DummyInstaller()
+            # Monkeypatch INSTALLERS for this test
+            old_installers = install_module.INSTALLERS
+            install_module.INSTALLERS = [dummy_installer]
+            try:
+                install_module.install_repos(
+                    selected_repos=selected_repos,
+                    repositories_base_dir="/tmp",
+                    bin_dir="/bin",
+                    all_repos=all_repos,
+                    no_verification=False,
+                    preview=False,
+                    quiet=False,
+                    clone_mode="ssh",
+                    update_dependencies=False,
+                )
+            finally:
+                install_module.INSTALLERS = old_installers
+
+        # Check that installers ran with both identifiers
+        self.assertEqual(dummy_installer.calls, ["id1", "id2"])
+        self.assertEqual(mock_create_ink.call_count, 2)
+        self.assertEqual(mock_verify_repository.call_count, 2)
+
+    @patch("pkgmgr.install_repos.verify_repository")
+    @patch("pkgmgr.install_repos.get_repo_dir")
+    @patch("pkgmgr.install_repos.get_repo_identifier")
+    @patch("pkgmgr.install_repos.clone_repos")
+    def test_install_repos_skips_on_failed_verification(
+        self,
+        mock_clone_repos,
+        mock_get_repo_identifier,
+        mock_get_repo_dir,
+        mock_verify_repository,
+    ):
+        repo = {"name": "repo1", "verified": True}
+        selected_repos = [repo]
+        all_repos = selected_repos
+
+        mock_get_repo_identifier.return_value = "id1"
+        mock_get_repo_dir.return_value = "/tmp/repo1"
+
+        # Verification fails: ok=False, with error list
+        mock_verify_repository.return_value = (False, ["sig error"], None, None)
+
+        dummy_installer = DummyInstaller()
+        with patch("os.path.exists", return_value=True), \
+             patch("pkgmgr.install_repos.create_ink") as mock_create_ink, \
+             patch("builtins.input", return_value="n"):
+            old_installers = install_module.INSTALLERS
+            install_module.INSTALLERS = [dummy_installer]
+            try:
+                install_module.install_repos(
+                    selected_repos=selected_repos,
+                    repositories_base_dir="/tmp",
+                    bin_dir="/bin",
+                    all_repos=all_repos,
+                    no_verification=False,
+                    preview=False,
+                    quiet=False,
+                    clone_mode="ssh",
+                    update_dependencies=False,
+                )
+            finally:
+                install_module.INSTALLERS = old_installers
+
+        # No installer run and no create_ink when user declines
+        self.assertEqual(dummy_installer.calls, [])
+        mock_create_ink.assert_not_called()
+
+
+if __name__ == "__main__":
+    unittest.main()