.github: add workflow to open downstream PR

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

Author: flouthoc

.github/workflows/opendownstream-pr.yml

@@ -0,0 +1,171 @@
+name: 'Open downstream PRs'
+
+on:
+  pull_request_target:
+    branches:
+      - 'main'
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Self'
+        uses: actions/checkout@v5
+        # 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 ${{ github.repository }} --json files --jq '.files[].path')
+          
+          # Filter for relevant Go files that should trigger downstream sync
+          # Include: .go files (excluding test files and vendor directory)
+          # Exclude: *_test.go files, vendor/ directory files
+          RELEVANT_GO_FILES=$(echo "$CHANGED_FILES" | grep -E '\.go$' | grep -v '_test\.go$' | grep -v '^vendor/' || echo "")
+          
+          if [ -n "$RELEVANT_GO_FILES" ]; then
+            echo "Relevant Go files changed (excluding tests and vendor):"
+            echo "should_run=true" >> $GITHUB_OUTPUT
+            echo "go_changes=true" >> $GITHUB_ENV
+          else
+            echo "No relevant Go files were changed in this PR."
+            echo "Only test files, vendor files, or non-Go files were modified - skipping downstream sync."
+            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@v6
+        with:
+          go-version: 'stable'
+
+      - name: 'Checkout forked buildah'
+        if: steps.check_go_changes.outputs.should_run == 'true'
+        uses: actions/checkout@v5
+        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
+          
+          # Function to update module and verify
+          update_module() {
+            local module=$1
+            echo "Updating module: $module"
+            go mod edit -replace ${module}=github.com/${{ github.event.pull_request.head.repo.full_name }}/${module#go.podman.io/}@${COMMIT_SHA}
+            GOWORK=off go mod tidy
+          }
+          
+          # Update all required modules
+          update_module "go.podman.io/common"
+          update_module "go.podman.io/storage" 
+          update_module "go.podman.io/image/v5"
+          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 $BRANCH_NAME
+          
+          git add .
+          git commit -m "dnd: Vendor changes from containers/container-libs#${{ 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 \
+              --draft \
+              --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 }}**"
+            gh pr comment ${{ env.SELF_REPO_PR_NUMBER }} \
+              --repo ${{ github.repository }} \
+              --body "$COMMENT_BODY"
+          fi
+
+      - name: 'Skip workflow - No relevant Go files changed'
+        if: steps.check_go_changes.outputs.should_run == 'false'
+        run: |
+          echo "✅ Workflow completed successfully - No relevant Go files were changed in this PR."
+          echo "The downstream sync workflow was skipped as it only runs when non-test .go files (excluding vendor/) are modified."

go.work.sum

@@ -22,6 +22,7 @@ github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.26.0
 github.com/Microsoft/cosesign1go v1.4.0/go.mod h1:1La/HcGw19rRLhPW0S6u55K6LKfti+GQSgGCtrfhVe8=
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 github.com/Microsoft/go-winio v0.4.21/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
+github.com/Microsoft/hcsshim v0.12.9/go.mod h1:fJ0gkFAna6ukt0bLdKB8djt4XIJhF/vEPuoIWYVvZ8Y=
 github.com/Microsoft/hcsshim v0.13.0/go.mod h1:9KWJ/8DgU+QzYGupX4tzMhRQE8h6w90lH6HAaclpEok=
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@@ -33,6 +34,7 @@ github.com/akavel/rsrc v0.10.2/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxk
 github.com/alecthomas/kingpin/v2 v2.4.0/go.mod h1:0gyi0zQnjuFk8xrkNKamJoyUo382HRL7ATRpFZCw6tE=
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 github.com/alexflint/go-filemutex v1.3.0/go.mod h1:U0+VA/i30mGBlLCrFPGtTe9y6wGQfNAWPBTekHQ+c8A=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
 github.com/aws/aws-sdk-go v1.55.5/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
 github.com/aws/aws-sdk-go-v2 v1.32.8/go.mod h1:P5WJBrYqqbWVaOxgH0X/FYYD47/nooaPOZPlQdmiN2U=
@@ -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/common-nighthawk/go-figure v0.0.0-20210622060536-734e95fb86be/go.mod h1:mk5IQ+Y0ZeO87b858TlA645sVcEcbiX6YqP98kt+7+w=
+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
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
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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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+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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@@ -180,6 +188,7 @@ github.com/proglottis/gpgme v0.1.4/go.mod h1:5LoXMgpE4bttgwwdv9bLs/vwqv3qV7F4glE
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+github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
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@@ -282,6 +291,8 @@ google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
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+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
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