Update build.yaml and install.sh for improved Python version handling and pip installation

Author: ipa-rwu

.github/workflows/build.yaml

@@ -7,15 +7,15 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version_ubuntu-latest: ["3.10", 3.11]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/[email protected]
 
-      - name: Set up Python ${{ matrix.python-version_ubuntu-latest }}
+      - name: Set up Python ${{ matrix.python-version }}
         uses: actions/[email protected]
         with:
-          python-version: ${{ matrix.python-version_ubuntu-latest }}
+          python-version: ${{ matrix.python-version }}
 
       - name: Install dependencies
         run: python -m pip install --upgrade pip setuptools wheel
@@ -54,7 +54,7 @@ jobs:
         run: pip install pre-commit
 
       - name: pre-commit cache
-        uses: actions/cache@v3.3.2
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pre-commit
           key: "${{ hashFiles('.pre-commit-config.yaml') }}"

install.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -euo pipefail
 
 if [ ! -d venv ]; then
     for p in "py -3.8" "py -3" "python3.8" "python3" "python"; do
@@ -10,11 +11,35 @@ if [ ! -d venv ]; then
     ${pycmd:?Could not determine python executable} -m venv venv
 fi
 
-if [ "$GIT_ACTION" = true ]; then
-    venv/*/pip install -e .
-    venv/*/pip install --find-links wheels -e .
-else
-    venv/*/pip install -e src/ros2model
+shopt -s nullglob
+pip_candidates=(venv/bin/pip venv/*/pip)
+pip_cmd=""
+for candidate in "${pip_candidates[@]}"; do
+    if [ -x "$candidate" ]; then
+        pip_cmd="$candidate"
+        break
+    fi
+done
+shopt -u nullglob
+
+if [ -z "$pip_cmd" ]; then
+    echo "Could not locate pip inside the virtual environment." >&2
+    exit 1
+fi
 
-    venv/*/pip install --find-links wheels -e src/ros2model
+extra_args=()
+if [ -d wheels ] && compgen -G "wheels/*" > /dev/null; then
+    extra_args=(--find-links wheels)
+fi
+
+if [ "${GIT_ACTION:-false}" = true ]; then
+    "$pip_cmd" install -e .
+    if [ "${#extra_args[@]}" -gt 0 ]; then
+        "$pip_cmd" install "${extra_args[@]}" -e .
+    fi
+else
+    "$pip_cmd" install -e src/ros2model
+    if [ "${#extra_args[@]}" -gt 0 ]; then
+        "$pip_cmd" install "${extra_args[@]}" -e src/ros2model
+    fi
 fi