.github: add workflow to open downstream PR

Signed-off-by: flouthoc <[email protected]>

Author: flouthoc

.github/workflows/opendownstream-pr.yml

@@ -0,0 +1,169 @@
+name: 'Open downstream PRs'
+
+on:
+  pull_request_target
+  #pull_request:
+  #  types: [opened, synchronize] # Triggers on PR creation and on new commits to the PR
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Self'
+        uses: actions/checkout@v4
+        # This checks out the code from the PR branch itself
+
+      - name: 'Check for Go file changes'
+        id: check_go_changes
+        run: |
+          # Get the list of changed files in the PR
+          CHANGED_FILES=$(gh pr view ${{ github.event.pull_request.number }} --repo ${{ github.repository }} --json files --jq '.files[].path')
+          echo "Changed files in PR:"
+          echo "$CHANGED_FILES"
+          
+          # Check if any .go files were changed
+          GO_FILES_CHANGED=$(echo "$CHANGED_FILES" | grep -E '\.go$' || echo "")
+          
+          if [ -n "$GO_FILES_CHANGED" ]; then
+            echo "Go files were changed:"
+            echo "$GO_FILES_CHANGED"
+            echo "should_run=true" >> $GITHUB_OUTPUT
+            echo "go_changes=true" >> $GITHUB_ENV
+          else
+            echo "No Go files were changed in this PR."
+            echo "should_run=false" >> $GITHUB_OUTPUT
+            echo "go_changes=false" >> $GITHUB_ENV
+          fi
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: 'Setup Go'
+        if: steps.check_go_changes.outputs.should_run == 'true'
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
+
+      - name: 'Checkout forked buildah'
+        if: steps.check_go_changes.outputs.should_run == 'true'
+        uses: actions/checkout@v4
+        with:
+          repository: 'flouthoc/buildah' # The target repository
+          path: 'buildah'                 # Checkout into a sub-directory
+          token: ${{ secrets.VENDOR_TOKEN_PODMANBOT }}
+
+      - name: 'Vendor Code from this repo to buildah'
+        if: steps.check_go_changes.outputs.should_run == 'true'
+        run: |
+          # Get the current commit SHA from the PR
+          COMMIT_SHA="${{ github.event.pull_request.head.sha }}"
+          echo "Using commit SHA: $COMMIT_SHA"
+          
+          cd buildah
+          # Create a unique branch name based on the container-libs PR number
+          BRANCH_NAME="sync/container-libs-${{ github.event.pull_request.number }}"
+          git switch -c $BRANCH_NAME
+          git remote add upstream https://github.com/containers/buildah.git
+          git fetch upstream
+          git rebase upstream/main
+          
+          
+          echo "Current go.mod before update:"
+          cat go.mod
+          
+          # Update the go.mod file to use the specific commit
+          go mod edit -replace go.podman.io/common=github.com/flouthoc/container-libs/common@${COMMIT_SHA}
+
+          echo "After go mod edit"
+          cat go.mod
+          
+          # Download and verify the module
+          GOWORK=off go mod tidy
+          GOWORK=off go mod vendor
+          GOWORK=off go mod verify
+          
+          echo "Updated go.mod:"
+          cat go.mod
+          
+      - name: 'Commit and Push to buildah'
+        if: steps.check_go_changes.outputs.should_run == 'true'
+        run: |
+          cd buildah
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          
+          BRANCH_NAME="sync/container-libs-${{ github.event.pull_request.number }}"
+          git switch $BRANCH_NAME
+          
+          git add .
+          git commit -m "feat: Vendor changes from podmanbot/container-libs#${{ github.event.pull_request.number }}"
+          
+          # Force push to update the branch if the action re-runs on 'synchronize'
+          git push origin $BRANCH_NAME --force
+          
+          echo "BRANCH_NAME=$BRANCH_NAME" >> $GITHUB_ENV
+
+      - name: 'Create or Update Pull Request in Buildah'
+        if: steps.check_go_changes.outputs.should_run == 'true'
+        id: create_pr
+        env:
+          GH_TOKEN: ${{ secrets.VENDOR_TOKEN_PODMANBOT }}
+          SELF_REPO_PR_NUMBER: ${{ github.event.pull_request.number }}
+          SELF_REPO_PR_URL: ${{ github.event.pull_request.html_url }}
+          SELF_REPO_PR_TITLE: ${{ github.event.pull_request.title }}
+        run: |
+          cd buildah
+          
+          BRANCH_NAME="sync/container-libs-${{ github.event.pull_request.number }}"
+          PR_TITLE="Sync: ${{ env.SELF_REPO_PR_TITLE }}"
+          PR_BODY="This PR automatically vendors changes from [repo-A#${{ env.SELF_REPO_PR_NUMBER }}](${{ env.SELF_REPO_PR_URL }})."
+          
+          # Check if PR already exists for this branch
+          echo "Searching for existing PR with branch: $BRANCH_NAME"
+          
+          EXISTING_PR_URL=$(gh pr list --repo flouthoc/buildah --head "$BRANCH_NAME" --json url --jq '.[0].url // empty' 2>/dev/null || echo "")
+          
+          if [ -n "$EXISTING_PR_URL" ]; then
+            echo "Found existing PR: $EXISTING_PR_URL"
+            # Update existing PR title and body
+            gh pr edit $EXISTING_PR_URL \
+              --title "$PR_TITLE" \
+              --body "$PR_BODY"
+            echo "Updated existing PR: $EXISTING_PR_URL"
+            echo "pr_url=$EXISTING_PR_URL" >> $GITHUB_OUTPUT
+            echo "pr_action=updated" >> $GITHUB_OUTPUT
+          else
+            # Create new PR
+            NEW_PR_URL=$(gh pr create \
+              --repo flouthoc/buildah \
+              --base main \
+              --head "$BRANCH_NAME" \
+              --title "$PR_TITLE" \
+              --body "$PR_BODY")
+            echo "Created new PR: $NEW_PR_URL"
+            echo "pr_url=$NEW_PR_URL" >> $GITHUB_OUTPUT
+            echo "pr_action=created" >> $GITHUB_OUTPUT
+          fi
+
+      - name: 'Comment on container-libs PR with the link to buildah PR'
+        if: steps.check_go_changes.outputs.should_run == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.VENDOR_TOKEN_PODMANBOT }}
+          SELF_REPO_PR_NUMBER: ${{ github.event.pull_request.number }}
+          TARGET_REPO_PR_URL: ${{ steps.create_pr.outputs.pr_url }}
+          PR_ACTION: ${{ steps.create_pr.outputs.pr_action }}
+        run: |
+          if [ "${{ env.PR_ACTION }}" = "created" ]; then
+            COMMENT_BODY="✅ A new PR has been created in buildah to vendor these changes: **${{ env.TARGET_REPO_PR_URL }}**"
+          else
+            COMMENT_BODY="✅ The existing PR in buildah has been updated with these changes: **${{ env.TARGET_REPO_PR_URL }}**"
+          fi
+          
+          gh pr comment ${{ env.SELF_REPO_PR_NUMBER }} \
+            --repo ${{ github.repository }} \
+            --body "$COMMENT_BODY"
+
+      - name: 'Skip workflow - No Go files changed'
+        if: steps.check_go_changes.outputs.should_run == 'false'
+        run: |
+          echo "✅ Workflow completed successfully - No Go files were changed in this PR."
+          echo "The downstream sync workflow was skipped as it only runs when .go files are modified."

go.work.sum

@@ -22,6 +22,7 @@ github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.26.0
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+github.com/Microsoft/hcsshim v0.12.9/go.mod h1:fJ0gkFAna6ukt0bLdKB8djt4XIJhF/vEPuoIWYVvZ8Y=
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@@ -33,6 +34,7 @@ github.com/akavel/rsrc v0.10.2/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxk
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@@ -65,6 +67,7 @@ github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGX
 github.com/cncf/xds/go v0.0.0-20250121191232-2f005788dc42/go.mod h1:W+zGtBO5Y1IgJhy4+A9GOqVhqLpfZi+vwmdNXUehLA8=
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+github.com/containerd/cgroups/v3 v3.0.3/go.mod h1:8HBe7V3aWGLFPd/k03swSIsGjZhHI2WzJmticMgVuz0=
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@@ -75,7 +78,9 @@ github.com/containerd/go-runc v1.0.0/go.mod h1:cNU0ZbCgCQVZK4lgG3P+9tn9/PaJNmoDX
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+github.com/containerd/typeurl/v2 v2.2.0/go.mod h1:8XOOxnyatxSWuG8OfsZXVnAF4iZfedjS/8UHSPJnX4g=
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@@ -105,6 +110,7 @@ github.com/golang-jwt/jwt/v5 v5.2.1/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVI
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+github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
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@@ -114,13 +120,15 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
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+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
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@@ -180,6 +188,7 @@ github.com/proglottis/gpgme v0.1.4/go.mod h1:5LoXMgpE4bttgwwdv9bLs/vwqv3qV7F4glE
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@@ -282,6 +291,8 @@ google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
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