Refactor CI distro handling and container build scripts

- Introduce a GitHub Actions matrix for `test-container` and `test-e2e`
  to run against arch, debian, ubuntu, fedora, and centos
- Run unit and integration tests only in the Arch container by passing
  `distro="arch"` via make in the corresponding workflows
- Replace the global DISTROS loop with a single `distro` variable in
  the Makefile, defaulting to `arch`, and export it for all scripts
- Update build scripts (build-image, build-image-no-cache, build-image-missing)
  to build images for the selected distro only
- Simplify test-container script to validate a single distro image using
  the `distro` environment variable
- Simplify E2E, unit, and integration test scripts to run against a
  single distro container instead of iterating over all distros

https://chatgpt.com/share/693acbba-9e30-800f-94fb-fea4489e9078

.github/workflows/test-container.yml

@@ -7,6 +7,10 @@ jobs:
   test-container:
     runs-on: ubuntu-latest
     timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        distro: [arch, debian, ubuntu, fedora, centos]
 
     steps:
       - name: Checkout repository
@@ -15,5 +19,7 @@ jobs:
       - name: Show Docker version
         run: docker version
 
-      - name: Run container tests
-        run: make test-container
+      - name: Run container tests (${{ matrix.distro }})
+        run: |
+          set -euo pipefail
+          distro="${{ matrix.distro }}" make test-container

.github/workflows/test-e2e.yml

@@ -6,7 +6,11 @@ on:
 jobs:
   test-e2e:
     runs-on: ubuntu-latest
-    timeout-minutes: 60  # E2E + all distros can be heavier
+    timeout-minutes: 60  # E2E can be heavier
+    strategy:
+      fail-fast: false
+      matrix:
+        distro: [arch, debian, ubuntu, fedora, centos]
 
     steps:
       - name: Checkout repository
@@ -15,5 +19,7 @@ jobs:
       - name: Show Docker version
         run: docker version
 
-      - name: Run E2E tests via make (all distros)
-        run: make test-e2e
+      - name: Run E2E tests via make (${{ matrix.distro }})
+        run: |
+          set -euo pipefail
+          distro="${{ matrix.distro }}" make test-e2e

.github/workflows/test-integration.yml

@@ -16,4 +16,4 @@ jobs:
         run: docker version
 
       - name: Run integration tests via make (Arch container)
-        run: make test-integration DISTROS="arch"
+        run: make test-integration distro="arch"

.github/workflows/test-unit.yml

@@ -16,4 +16,4 @@ jobs:
         run: docker version
 
       - name: Run unit tests via make (Arch container)
-        run: make test-unit DISTROS="arch"
+        run: make test-unit distro="arch"

Makefile

@@ -2,11 +2,15 @@
         test build build-no-cache test-unit test-e2e test-integration \
         test-container
 
+# Distro
+# Options: arch debian ubuntu fedora centos
+distro ?= arch
+export distro
+
 # ------------------------------------------------------------
-# Distro list and base images
+# Base images
 # (kept for documentation/reference; actual build logic is in scripts/build)
 # ------------------------------------------------------------
-DISTROS 		  := arch debian ubuntu fedora centos
 BASE_IMAGE_ARCH   := archlinux:latest
 BASE_IMAGE_DEBIAN := debian:stable-slim
 BASE_IMAGE_UBUNTU := ubuntu:latest
@@ -14,7 +18,6 @@ BASE_IMAGE_FEDORA := fedora:latest
 BASE_IMAGE_CENTOS := quay.io/centos/centos:stream9
 
 # Make them available in scripts
-export DISTROS
 export BASE_IMAGE_ARCH  
 export BASE_IMAGE_DEBIAN
 export BASE_IMAGE_UBUNTU

scripts/build/build-image-missing.sh

@@ -4,17 +4,12 @@ set -euo pipefail
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 source "${SCRIPT_DIR}/resolve-base-image.sh"
 
-echo "============================================================"
-echo ">>> Building ONLY missing container images"
-echo "============================================================"
-
-for distro in $DISTROS; do
 IMAGE="package-manager-test-$distro"
 BASE_IMAGE="$(resolve_base_image "$distro")"
 
 if docker image inspect "$IMAGE" >/dev/null 2>&1; then
     echo "[build-missing] Image already exists: $IMAGE (skipping)"
-        continue
+    exit 0
 fi
 
 echo
@@ -27,9 +22,3 @@ for distro in $DISTROS; do
     --build-arg BASE_IMAGE="$BASE_IMAGE" \
     -t "$IMAGE" \
     .
-done
-
-echo
-echo "============================================================"
-echo ">>> build-missing: Done"
-echo "============================================================"

scripts/build/build-image-no-cache.sh

@@ -4,7 +4,6 @@ set -euo pipefail
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 source "${SCRIPT_DIR}/resolve-base-image.sh"
 
-for distro in $DISTROS; do
 base_image="$(resolve_base_image "$distro")"
 
 echo ">>> Building test image for distro '$distro' with NO CACHE (BASE_IMAGE=$base_image)..."
@@ -14,4 +13,3 @@ for distro in $DISTROS; do
   --build-arg BASE_IMAGE="$base_image" \
   -t "package-manager-test-$distro" \
   .
-done

scripts/build/build-image.sh

@@ -4,7 +4,6 @@ set -euo pipefail
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 source "${SCRIPT_DIR}/resolve-base-image.sh"
 
-for distro in $DISTROS; do
 base_image="$(resolve_base_image "$distro")"
 
 echo ">>> Building test image for distro '$distro' (BASE_IMAGE=$base_image)..."
@@ -13,4 +12,3 @@ for distro in $DISTROS; do
   --build-arg BASE_IMAGE="$base_image" \
   -t "package-manager-test-$distro" \
   .
-done

scripts/test/test-container.sh

@@ -1,11 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-echo "============================================================"
-echo ">>> Running sanity test: verifying test containers start"
-echo "============================================================"
-
-for distro in $DISTROS; do
 IMAGE="package-manager-test-$distro"
 
 echo
@@ -33,9 +28,3 @@ for distro in $DISTROS; do
     echo "[test-container] ERROR: $IMAGE failed to run 'pkgmgr --help'"
     exit 1
 fi
-done
-
-echo
-echo "============================================================"
-echo ">>> All containers passed the sanity check"
-echo "============================================================"

scripts/test/test-e2e.sh

@@ -1,9 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-echo ">>> Running E2E tests in all distros: $DISTROS"
-
-for distro in $DISTROS; do
 echo "============================================================"
 echo ">>> Running E2E tests: $distro"
 echo "============================================================"
@@ -61,4 +58,3 @@ for distro in $DISTROS; do
         -s /src/tests/e2e \
         -p "$TEST_PATTERN"
   '
-done

scripts/test/test-integration.sh

@@ -1,8 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-: "${distro:=arch}"
-
 echo "============================================================"
 echo ">>> Running INTEGRATION tests in ${distro} container"
 echo "============================================================"

scripts/test/test-unit.sh

@@ -1,8 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-: "${distro:=arch}"
-
 echo "============================================================"
 echo ">>> Running UNIT tests in ${distro} container"
 echo "============================================================"