feat(version): show installed pkgmgr version when no repo is selected

- Add installed version detection for Python environments and Nix profiles
- Display pkgmgr’s own installed version when run outside a repository
- Improve version command output to include installed vs source versions
- Prefer editable venv setup as default in Makefile setup target

https://chatgpt.com/share/693e9f02-9b34-800f-8eeb-c7c776b3faa7

Makefile

@@ -44,7 +44,7 @@ install:
 # ------------------------------------------------------------
 
 # Default: keep current auto-detection behavior
-setup: setup-nix setup-venv
+setup: setup-venv
 
 # Explicit: developer setup (Python venv + shell RC + install)
 setup-venv: setup-nix

src/pkgmgr/cli/commands/version.py

@@ -9,8 +9,13 @@ from pkgmgr.core.repository.dir import get_repo_dir
 from pkgmgr.core.repository.identifier import get_repo_identifier
 from pkgmgr.core.git import get_tags
 from pkgmgr.core.version.semver import SemVer, find_latest_version
+from pkgmgr.core.version.installed import (
+    get_installed_python_version,
+    get_installed_nix_profile_version,
+)
 from pkgmgr.core.version.source import (
     read_pyproject_version,
+    read_pyproject_project_name,
     read_flake_version,
     read_pkgbuild_version,
     read_debian_changelog_version,
@@ -18,10 +23,54 @@ from pkgmgr.core.version.source import (
     read_ansible_galaxy_version,
 )
 
-
 Repository = Dict[str, Any]
 
 
+def _print_pkgmgr_self_version() -> None:
+    """
+    Print version information for pkgmgr itself (installed env + nix profile),
+    used when no repository is selected (e.g. user is not inside a repo).
+    """
+    print("pkgmgr version info")
+    print("====================")
+    print("\nRepository: <pkgmgr self>")
+    print("----------------------------------------")
+
+    # Common distribution/module naming variants.
+    python_candidates = [
+        "package-manager",   # PyPI dist name in your project
+        "package_manager",   # module-ish variant
+        "pkgmgr",            # console/alias-ish
+    ]
+    nix_candidates = [
+        "pkgmgr",
+        "package-manager",
+    ]
+
+    installed_python = get_installed_python_version(*python_candidates)
+    installed_nix = get_installed_nix_profile_version(*nix_candidates)
+
+    if installed_python:
+        print(
+            f"Installed (Python env):  {installed_python.version} "
+            f"(dist: {installed_python.name})"
+        )
+    else:
+        print("Installed (Python env):  <not installed>")
+
+    if installed_nix:
+        print(
+            f"Installed (Nix profile): {installed_nix.version} "
+            f"(match: {installed_nix.name})"
+        )
+    else:
+        print("Installed (Nix profile): <not installed>")
+
+    # Helpful context for debugging "why do versions differ?"
+    print(f"Python executable:       {sys.executable}")
+    print(f"Python prefix:           {sys.prefix}")
+
+
 def handle_version(
     args,
     ctx: CLIContext,
@@ -30,20 +79,39 @@ def handle_version(
     """
     Handle the 'version' command.
 
-    Shows version information from various sources (git tags, pyproject,
-    flake.nix, PKGBUILD, debian, spec, Ansible Galaxy).
-    """
+    Shows version information from:
+      - Git tags
+      - packaging metadata
+      - installed Python environment
+      - installed Nix profile
 
-    repo_list = selected
-    if not repo_list:
-        print("No repositories selected for version.")
-        sys.exit(1)
+    Special case:
+      - If no repositories are selected (e.g. not in a repo and no identifiers),
+        print pkgmgr's own installed versions instead of exiting with an error.
+    """
+    if not selected:
+        _print_pkgmgr_self_version()
+        return
 
     print("pkgmgr version info")
     print("====================")
 
-    for repo in repo_list:
-        # Resolve repository directory
+    for repo in selected:
+        identifier = get_repo_identifier(repo, ctx.all_repositories)
+
+        python_candidates: list[str] = []
+        nix_candidates: list[str] = [identifier]
+
+        for key in ("pypi", "pip", "python_package", "distribution", "package"):
+            val = repo.get(key)
+            if isinstance(val, str) and val.strip():
+                python_candidates.append(val.strip())
+
+        python_candidates.append(identifier)
+
+        installed_python = get_installed_python_version(*python_candidates)
+        installed_nix = get_installed_nix_profile_version(*nix_candidates)
+
         repo_dir = repo.get("directory")
         if not repo_dir:
             try:
@@ -51,51 +119,79 @@ def handle_version(
             except Exception:
                 repo_dir = None
 
-        # If no local clone exists, skip gracefully with info message
         if not repo_dir or not os.path.isdir(repo_dir):
-            identifier = get_repo_identifier(repo, ctx.all_repositories)
             print(f"\nRepository: {identifier}")
             print("----------------------------------------")
             print(
-                "[INFO] Skipped: repository directory does not exist "
-                "locally, version detection is not possible."
+                "[INFO] Skipped: repository directory does not exist locally, "
+                "version detection is not possible."
             )
+
+            if installed_python:
+                print(
+                    f"Installed (Python env):  {installed_python.version} "
+                    f"(dist: {installed_python.name})"
+                )
+            else:
+                print("Installed (Python env):  <not installed>")
+
+            if installed_nix:
+                print(
+                    f"Installed (Nix profile): {installed_nix.version} "
+                    f"(match: {installed_nix.name})"
+                )
+            else:
+                print("Installed (Nix profile): <not installed>")
+
             continue
 
         print(f"\nRepository: {repo_dir}")
         print("----------------------------------------")
 
-        # 1) Git tags (SemVer)
         try:
             tags = get_tags(cwd=repo_dir)
         except Exception as exc:
             print(f"[ERROR] Could not read git tags: {exc}")
             tags = []
 
-        latest_tag_info: Optional[Tuple[str, SemVer]]
-        latest_tag_info = find_latest_version(tags) if tags else None
+        latest_tag_info: Optional[Tuple[str, SemVer]] = (
+            find_latest_version(tags) if tags else None
+        )
 
-        if latest_tag_info is None:
-            latest_tag_str = None
-            latest_ver = None
+        if latest_tag_info:
+            tag, ver = latest_tag_info
+            print(f"Git (latest SemVer tag): {tag} (parsed: {ver})")
         else:
-            latest_tag_str, latest_ver = latest_tag_info
+            print("Git (latest SemVer tag): <none found>")
 
-        # 2) Packaging / metadata sources
         pyproject_version = read_pyproject_version(repo_dir)
+        pyproject_name = read_pyproject_project_name(repo_dir)
         flake_version = read_flake_version(repo_dir)
         pkgbuild_version = read_pkgbuild_version(repo_dir)
         debian_version = read_debian_changelog_version(repo_dir)
         spec_version = read_spec_version(repo_dir)
         ansible_version = read_ansible_galaxy_version(repo_dir)
 
-        # 3) Print version summary
-        if latest_ver is not None:
+        if pyproject_name:
+            installed_python = get_installed_python_version(
+                pyproject_name, *python_candidates
+            )
+
+        if installed_python:
             print(
-                f"Git (latest SemVer tag): {latest_tag_str} (parsed: {latest_ver})"
+                f"Installed (Python env):  {installed_python.version} "
+                f"(dist: {installed_python.name})"
             )
         else:
-            print("Git (latest SemVer tag): <none found>")
+            print("Installed (Python env):  <not installed>")
+
+        if installed_nix:
+            print(
+                f"Installed (Nix profile): {installed_nix.version} "
+                f"(match: {installed_nix.name})"
+            )
+        else:
+            print("Installed (Nix profile): <not installed>")
 
         print(f"pyproject.toml:         {pyproject_version or '<not found>'}")
         print(f"flake.nix:              {flake_version or '<not found>'}")
@@ -104,15 +200,16 @@ def handle_version(
         print(f"package-manager.spec:   {spec_version or '<not found>'}")
         print(f"Ansible Galaxy meta:    {ansible_version or '<not found>'}")
 
-        # 4) Consistency hint (Git tag vs. pyproject)
-        if latest_ver is not None and pyproject_version is not None:
+        if latest_tag_info and pyproject_version:
             try:
                 file_ver = SemVer.parse(pyproject_version)
-                if file_ver != latest_ver:
+                if file_ver != latest_tag_info[1]:
                     print(
-                        f"[WARN] Version mismatch: Git={latest_ver}, pyproject={file_ver}"
+                        f"[WARN] Version mismatch: "
+                        f"Git={latest_tag_info[1]}, pyproject={file_ver}"
                     )
             except ValueError:
                 print(
-                    f"[WARN] pyproject version {pyproject_version!r} is not valid SemVer."
+                    f"[WARN] pyproject version {pyproject_version!r} "
+                    f"is not valid SemVer."
                 )

src/pkgmgr/core/version/installed.py

@@ -0,0 +1,168 @@
+from __future__ import annotations
+
+import json
+import re
+import shutil
+import subprocess
+from dataclasses import dataclass
+from typing import Iterable, Optional, Tuple
+
+
+@dataclass(frozen=True)
+class InstalledVersion:
+    """
+    Represents a resolved installed version and the matched name.
+    """
+    name: str
+    version: str
+
+
+def _normalize(name: str) -> str:
+    return re.sub(r"[-_.]+", "-", (name or "").strip()).lower()
+
+
+def _unique_candidates(names: Iterable[str]) -> list[str]:
+    seen: set[str] = set()
+    out: list[str] = []
+    for n in names:
+        if not n:
+            continue
+        key = _normalize(n)
+        if key in seen:
+            continue
+        seen.add(key)
+        out.append(n)
+    return out
+
+
+def get_installed_python_version(*candidates: str) -> Optional[InstalledVersion]:
+    """
+    Detect installed Python package version in the CURRENT Python environment.
+
+    Strategy:
+      1) Exact normalized match using importlib.metadata.version()
+      2) Substring fallback by scanning installed distributions
+    """
+    try:
+        from importlib import metadata as importlib_metadata
+    except Exception:
+        return None
+
+    candidates = _unique_candidates(candidates)
+
+    expanded: list[str] = []
+    for c in candidates:
+        n = _normalize(c)
+        expanded.extend([c, n, n.replace("-", "_"), n.replace("-", ".")])
+    expanded = _unique_candidates(expanded)
+
+    # 1) Direct queries first (fast path)
+    for name in expanded:
+        try:
+            version = importlib_metadata.version(name)
+            return InstalledVersion(name=name, version=version)
+        except Exception:
+            continue
+
+    # 2) Fallback: scan distributions (last resort)
+    try:
+        dists = importlib_metadata.distributions()
+    except Exception:
+        return None
+
+    norm_candidates = {_normalize(c) for c in candidates}
+
+    for dist in dists:
+        dist_name = dist.metadata.get("Name", "") or ""
+        norm_dist = _normalize(dist_name)
+        for c in norm_candidates:
+            if c and (c in norm_dist or norm_dist in c):
+                ver = getattr(dist, "version", None)
+                if ver:
+                    return InstalledVersion(name=dist_name, version=ver)
+
+    return None
+
+
+def _run_nix(args: list[str]) -> Tuple[int, str, str]:
+    p = subprocess.run(
+        args,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        text=True,
+        check=False,
+    )
+    return p.returncode, p.stdout or "", p.stderr or ""
+
+
+def _extract_version_from_store_path(path: str) -> Optional[str]:
+    if not path:
+        return None
+    base = path.rstrip("/").split("/")[-1]
+    if "-" not in base:
+        return None
+    tail = base.split("-")[-1]
+    if re.match(r"\d+(\.\d+){0,3}([a-z0-9+._-]*)?$", tail, re.I):
+        return tail
+    return None
+
+
+def get_installed_nix_profile_version(*candidates: str) -> Optional[InstalledVersion]:
+    """
+    Detect installed version from the current Nix profile.
+
+    Strategy:
+      1) JSON output (exact normalized match)
+      2) Text fallback (substring)
+    """
+    if shutil.which("nix") is None:
+        return None
+
+    candidates = _unique_candidates(candidates)
+    if not candidates:
+        return None
+
+    norm_candidates = {_normalize(c) for c in candidates}
+
+    # Preferred: JSON output
+    rc, out, _ = _run_nix(["nix", "profile", "list", "--json"])
+    if rc == 0 and out.strip():
+        try:
+            data = json.loads(out)
+            elements = data.get("elements") or data.get("items") or {}
+            if isinstance(elements, dict):
+                for elem in elements.values():
+                    if not isinstance(elem, dict):
+                        continue
+                    name = (elem.get("name") or elem.get("pname") or "").strip()
+                    version = (elem.get("version") or "").strip()
+                    norm_name = _normalize(name)
+
+                    if norm_name in norm_candidates:
+                        if version:
+                            return InstalledVersion(name=name, version=version)
+                        for sp in elem.get("storePaths", []) or []:
+                            guess = _extract_version_from_store_path(sp)
+                            if guess:
+                                return InstalledVersion(name=name, version=guess)
+        except Exception:
+            pass
+
+    # Fallback: text mode
+    rc, out, _ = _run_nix(["nix", "profile", "list"])
+    if rc != 0:
+        return None
+
+    for line in out.splitlines():
+        norm_line = _normalize(line)
+        for c in norm_candidates:
+            if c in norm_line:
+                m = re.search(r"\b\d+(\.\d+){0,3}[a-z0-9+._-]*\b", line, re.I)
+                if m:
+                    return InstalledVersion(name=c, version=m.group(0))
+                if "/nix/store/" in line:
+                    guess = _extract_version_from_store_path(line.split()[-1])
+                    if guess:
+                        return InstalledVersion(name=c, version=guess)
+
+    return None

src/pkgmgr/core/version/source.py

@@ -1,21 +1,3 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-
-"""
-Helpers to extract version information from various packaging files.
-
-All functions take a repository directory and return either a version
-string or None if the corresponding file or version field is missing.
-
-Supported sources:
-- pyproject.toml   (PEP 621, [project].version)
-- flake.nix        (version = "X.Y.Z";)
-- PKGBUILD         (pkgver / pkgrel)
-- debian/changelog (first entry line: package (version) ...)
-- RPM spec file    (package-manager.spec: Version / Release)
-- Ansible Galaxy   (galaxy.yml or meta/main.yml)
-"""
-
 from __future__ import annotations
 
 import os
@@ -30,46 +12,61 @@ def read_pyproject_version(repo_dir: str) -> Optional[str]:
     Read the version from pyproject.toml in repo_dir, if present.
 
     Expects a PEP 621-style [project] table with a 'version' field.
-    Returns the version string or None.
     """
     path = os.path.join(repo_dir, "pyproject.toml")
-    if not os.path.exists(path):
+    if not os.path.isfile(path):
         return None
 
     try:
-        try:
-            import tomllib  # Python 3.11+
-        except ModuleNotFoundError:  # pragma: no cover
-            tomllib = None
-
-        if tomllib is None:
-            return None
+        import tomllib  # Python 3.11+
+    except Exception:
+        import tomli as tomllib  # type: ignore
 
+    try:
         with open(path, "rb") as f:
             data = tomllib.load(f)
-
-        project = data.get("project", {})
-        if isinstance(project, dict):
-            version = project.get("version")
-            if isinstance(version, str):
-                return version.strip() or None
+        project = data.get("project") or {}
+        version = project.get("version")
+        return str(version).strip() if version else None
     except Exception:
-        # Intentionally swallow errors and fall back to None.
         return None
 
-    return None
+
+def read_pyproject_project_name(repo_dir: str) -> Optional[str]:
+    """
+    Read distribution name from pyproject.toml ([project].name).
+
+    This is required to correctly resolve installed Python package
+    versions via importlib.metadata.
+    """
+    path = os.path.join(repo_dir, "pyproject.toml")
+    if not os.path.isfile(path):
+        return None
+
+    try:
+        import tomllib  # Python 3.11+
+    except Exception:
+        import tomli as tomllib  # type: ignore
+
+    try:
+        with open(path, "rb") as f:
+            data = tomllib.load(f)
+        project = data.get("project") or {}
+        name = project.get("name")
+        return str(name).strip() if name else None
+    except Exception:
+        return None
 
 
 def read_flake_version(repo_dir: str) -> Optional[str]:
     """
     Read the version from flake.nix in repo_dir, if present.
 
-    Looks for a line like:
-        version = "1.2.3";
-    and returns the string inside the quotes.
+    Looks for:
+        version = "X.Y.Z";
     """
     path = os.path.join(repo_dir, "flake.nix")
-    if not os.path.exists(path):
+    if not os.path.isfile(path):
         return None
 
     try:
@@ -81,22 +78,21 @@ def read_flake_version(repo_dir: str) -> Optional[str]:
     match = re.search(r'version\s*=\s*"([^"]+)"', text)
     if not match:
         return None
-    version = match.group(1).strip()
-    return version or None
+
+    return match.group(1).strip() or None
 
 
 def read_pkgbuild_version(repo_dir: str) -> Optional[str]:
     """
-    Read the version from PKGBUILD in repo_dir, if present.
+    Read the version from PKGBUILD in repo_dir.
 
-    Expects:
-        pkgver=1.2.3
-        pkgrel=1
-
-    Returns either "1.2.3-1" (if both are present) or just "1.2.3".
+    Combines pkgver and pkgrel if both exist:
+      pkgver=1.2.3
+      pkgrel=1
+    -> 1.2.3-1
     """
     path = os.path.join(repo_dir, "PKGBUILD")
-    if not os.path.exists(path):
+    if not os.path.isfile(path):
         return None
 
     try:
@@ -121,15 +117,13 @@ def read_pkgbuild_version(repo_dir: str) -> Optional[str]:
 
 def read_debian_changelog_version(repo_dir: str) -> Optional[str]:
     """
-    Read the latest Debian version from debian/changelog in repo_dir, if present.
+    Read the latest version from debian/changelog.
 
-    The first non-empty line typically looks like:
-        package-name (1.2.3-1) unstable; urgency=medium
-
-    We extract the text inside the first parentheses.
+    Expected format:
+      package (1.2.3-1) unstable; urgency=medium
     """
     path = os.path.join(repo_dir, "debian", "changelog")
-    if not os.path.exists(path):
+    if not os.path.isfile(path):
         return None
 
     try:
@@ -140,8 +134,7 @@ def read_debian_changelog_version(repo_dir: str) -> Optional[str]:
                     continue
                 match = re.search(r"\(([^)]+)\)", line)
                 if match:
-                    version = match.group(1).strip()
-                    return version or None
+                    return match.group(1).strip() or None
                 break
     except Exception:
         return None
@@ -151,81 +144,72 @@ def read_debian_changelog_version(repo_dir: str) -> Optional[str]:
 
 def read_spec_version(repo_dir: str) -> Optional[str]:
     """
-    Read the version from a RPM spec file.
+    Read the version from an RPM spec file.
 
-    For now, we assume a fixed file name 'package-manager.spec'
-    in repo_dir with lines like:
-
-        Version: 1.2.3
-        Release: 1%{?dist}
-
-    Returns either "1.2.3-1" (if Release is present) or "1.2.3".
-    Any RPM macro suffix like '%{?dist}' is stripped from the release.
+    Combines:
+      Version: 1.2.3
+      Release: 1%{?dist}
+    -> 1.2.3-1
     """
-    path = os.path.join(repo_dir, "package-manager.spec")
-    if not os.path.exists(path):
-        return None
+    for fn in os.listdir(repo_dir):
+        if not fn.endswith(".spec"):
+            continue
 
-    try:
-        with open(path, "r", encoding="utf-8") as f:
-            text = f.read()
-    except Exception:
-        return None
+        path = os.path.join(repo_dir, fn)
+        try:
+            with open(path, "r", encoding="utf-8") as f:
+                text = f.read()
+        except Exception:
+            return None
 
-    ver_match = re.search(r"^Version:\s*(.+)$", text, re.MULTILINE)
-    if not ver_match:
-        return None
-    version = ver_match.group(1).strip()
+        ver_match = re.search(r"^Version:\s*(.+)$", text, re.MULTILINE)
+        if not ver_match:
+            return None
+        version = ver_match.group(1).strip()
 
-    rel_match = re.search(r"^Release:\s*(.+)$", text, re.MULTILINE)
-    if rel_match:
-        release_raw = rel_match.group(1).strip()
-        # Strip common RPM macro suffix like %... (e.g. 1%{?dist})
-        release = release_raw.split("%", 1)[0].strip()
-        # Also strip anything after first whitespace, just in case
-        release = release.split(" ", 1)[0].strip()
-        if release:
-            return f"{version}-{release}"
+        rel_match = re.search(r"^Release:\s*(.+)$", text, re.MULTILINE)
+        if rel_match:
+            release_raw = rel_match.group(1).strip()
+            release = release_raw.split("%", 1)[0].split(" ", 1)[0].strip()
+            if release:
+                return f"{version}-{release}"
 
-    return version or None
+        return version or None
+
+    return None
 
 
 def read_ansible_galaxy_version(repo_dir: str) -> Optional[str]:
     """
-    Read the version from Ansible Galaxy metadata, if present.
+    Read the version from Ansible Galaxy metadata.
 
-    Supported locations:
-    - galaxy.yml  (preferred for modern roles/collections)
-    - meta/main.yml (legacy style roles; uses galaxy_info.version or version)
+    Supported:
+      - galaxy.yml
+      - meta/main.yml (galaxy_info.version or version)
     """
-    # 1) galaxy.yml in repo root
-    galaxy_path = os.path.join(repo_dir, "galaxy.yml")
-    if os.path.exists(galaxy_path):
+    galaxy_yml = os.path.join(repo_dir, "galaxy.yml")
+    if os.path.isfile(galaxy_yml):
         try:
-            with open(galaxy_path, "r", encoding="utf-8") as f:
+            with open(galaxy_yml, "r", encoding="utf-8") as f:
                 data = yaml.safe_load(f) or {}
             version = data.get("version")
             if isinstance(version, str) and version.strip():
                 return version.strip()
         except Exception:
-            # Ignore parse errors and fall through to meta/main.yml
             pass
 
-    # 2) meta/main.yml (classic Ansible role)
-    meta_path = os.path.join(repo_dir, "meta", "main.yml")
-    if os.path.exists(meta_path):
+    meta_yml = os.path.join(repo_dir, "meta", "main.yml")
+    if os.path.isfile(meta_yml):
         try:
-            with open(meta_path, "r", encoding="utf-8") as f:
+            with open(meta_yml, "r", encoding="utf-8") as f:
                 data = yaml.safe_load(f) or {}
 
-            # Preferred: galaxy_info.version
             galaxy_info = data.get("galaxy_info") or {}
             if isinstance(galaxy_info, dict):
                 version = galaxy_info.get("version")
                 if isinstance(version, str) and version.strip():
                     return version.strip()
 
-            # Fallback: top-level 'version'
             version = data.get("version")
             if isinstance(version, str) and version.strip():
                 return version.strip()