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name: Lib Dependencies Check
on:
pull_request_target:
types: [opened, synchronize, reopened]
paths:
- "Lib/**"
concurrency:
group: lib-deps-${{ github.event.pull_request.number }}
cancel-in-progress: true
env:
PYTHON_VERSION: "3.14.3"
jobs:
check_deps:
permissions:
pull-requests: write
runs-on: ubuntu-latest
timeout-minutes: 10
steps:
- name: Checkout base branch
uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
with:
# Use base branch for scripts (security: don't run PR code with elevated permissions)
ref: ${{ github.event.pull_request.base.ref }}
fetch-depth: 0
persist-credentials: false
- name: Fetch PR head
run: |
git fetch origin ${{ github.event.pull_request.head.sha }}
- name: Checkout PR Lib files
run: |
# Checkout only Lib/ directory from PR head for accurate comparison
git checkout ${{ github.event.pull_request.head.sha }} -- Lib/
- name: Checkout CPython
run: |
git clone --depth 1 --branch "v${{ env.PYTHON_VERSION }}" https://github.com/python/cpython.git cpython
- name: Get changed Lib files
id: changed-files
run: |
# Get the list of changed files under Lib/
changed=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }} -- 'Lib/*.py' 'Lib/**/*.py' | head -50)
echo "Changed files:"
echo "$changed"
# Extract unique module names
modules=""
for file in $changed; do
if [[ "$file" == Lib/test/* ]]; then
# Test files: Lib/test/test_pydoc.py -> test_pydoc, Lib/test/test_pydoc/foo.py -> test_pydoc
module=$(echo "$file" | sed -E 's|^Lib/test/||; s|\.py$||; s|/.*||')
# Skip non-test files in test/ (e.g., support.py, __init__.py)
if [[ ! "$module" == test_* ]]; then
continue
fi
else
# Lib files: Lib/foo.py -> foo, Lib/foo/__init__.py -> foo
module=$(echo "$file" | sed -E 's|^Lib/||; s|/__init__\.py$||; s|\.py$||; s|/.*||')
fi
if [[ -n "$module" && ! " $modules " =~ " $module " ]]; then
modules="$modules $module"
fi
done
modules=$(echo "$modules" | xargs) # trim whitespace
echo "Detected modules: $modules"
echo "modules=$modules" >> $GITHUB_OUTPUT
- name: Setup Python
if: steps.changed-files.outputs.modules != ''
uses: actions/setup-python@v6.2.0
with:
python-version: "${{ env.PYTHON_VERSION }}"
- name: Run deps check
if: steps.changed-files.outputs.modules != ''
id: deps-check
run: |
# Run deps for all modules at once
python scripts/update_lib deps ${{ steps.changed-files.outputs.modules }} --depth 2 > /tmp/deps_output.txt 2>&1 || true
# Read output for GitHub Actions
echo "deps_output<<EOF" >> $GITHUB_OUTPUT
cat /tmp/deps_output.txt >> $GITHUB_OUTPUT
echo "EOF" >> $GITHUB_OUTPUT
# Check if there's any meaningful output
if [ -s /tmp/deps_output.txt ]; then
echo "has_output=true" >> $GITHUB_OUTPUT
else
echo "has_output=false" >> $GITHUB_OUTPUT
fi
- name: Post comment
if: steps.deps-check.outputs.has_output == 'true'
uses: marocchino/sticky-pull-request-comment@v3
with:
header: lib-deps-check
number: ${{ github.event.pull_request.number }}
message: |
## 📦 Library Dependencies
The following Lib/ modules were modified. Here are their dependencies:
${{ steps.deps-check.outputs.deps_output }}
**Legend:**
- `[+]` path exists in CPython
- `[x]` up-to-date, `[ ]` outdated
- name: Remove comment if no Lib changes
if: steps.changed-files.outputs.modules == ''
uses: marocchino/sticky-pull-request-comment@v3
with:
header: lib-deps-check
number: ${{ github.event.pull_request.number }}
delete: true