chore(ci): compare registry PRs from fork point

.github/actions/registry-diff/action.yml

@@ -5,6 +5,9 @@ inputs:
   base_sha:
     description: "The base commit SHA to compare against"
     required: true
+  head_sha:
+    description: "The head commit SHA to compare against"
+    required: true
 outputs:
   modified_tools:
     description: "Space-separated list of all modified tools"
@@ -18,15 +21,18 @@ runs:
   steps:
     - id: diff
       shell: bash
+      env:
+        BASE_SHA: ${{ inputs.base_sha }}
+        HEAD_SHA: ${{ inputs.head_sha }}
       run: |
-        # Get added/modified registry files and extract tool names
+        # Get added/copied/modified/renamed registry files and extract tool names
         # (deleted files are excluded — they can't be tested)
-        modified=$(git diff --name-only --diff-filter=AM ${{ inputs.base_sha }} HEAD -- 'registry/*.toml' \
+        modified=$(git diff --name-only --diff-filter=ACMR "$BASE_SHA" "$HEAD_SHA" -- 'registry/*.toml' \
           | xargs -I{} basename {} .toml \
           | tr '\n' ' ')
 
         # Get newly added registry files
-        new=$(git diff --name-only --diff-filter=A ${{ inputs.base_sha }} HEAD -- 'registry/*.toml' \
+        new=$(git diff --name-only --diff-filter=A "$BASE_SHA" "$HEAD_SHA" -- 'registry/*.toml' \
           | xargs -I{} basename {} .toml \
           | tr '\n' ' ')
 

.github/workflows/registry.yml

@@ -26,18 +26,24 @@ jobs:
     timeout-minutes: 5
     outputs:
       registry-changed: ${{ steps.check.outputs.registry-changed }}
+      diff-base-sha: ${{ steps.check.outputs.diff-base-sha }}
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
           fetch-depth: 0
       - id: check
+        env:
+          PR_BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
         run: |
           if [ "${{ github.event_name }}" == "workflow_dispatch" ] || [ "${{ github.event_name }}" == "push" ]; then
             echo "registry-changed=true" >> "$GITHUB_OUTPUT"
             exit 0
           fi
+          diff_base_sha="$(git merge-base "$PR_BASE_SHA" "$PR_HEAD_SHA")"
+          echo "diff-base-sha=$diff_base_sha" >> "$GITHUB_OUTPUT"
           # Check if relevant files changed
-          if git diff --name-only ${{ github.event.pull_request.base.sha }} HEAD | grep -qE '^(registry/.*\.toml|\.github/workflows/registry\.yml|src/cli/test_tool\.rs)$'; then
+          if git diff --name-only "$diff_base_sha" "$PR_HEAD_SHA" | grep -qE '^(registry/.*\.toml|\.github/workflows/registry\.yml|src/cli/test_tool\.rs)$'; then
             echo "registry-changed=true" >> "$GITHUB_OUTPUT"
           else
             echo "registry-changed=false" >> "$GITHUB_OUTPUT"
@@ -95,15 +101,19 @@ jobs:
         with:
           fetch-depth: 0
       - id: workflow-check
+        env:
+          DIFF_BASE_SHA: ${{ needs.check-changes.outputs.diff-base-sha }}
+          PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
         run: |
-          if git diff --name-only ${{ github.event.pull_request.base.sha }} HEAD | grep -q ".github/workflows/registry.yml"; then
+          if git diff --name-only "$DIFF_BASE_SHA" "$PR_HEAD_SHA" | grep -q ".github/workflows/registry.yml"; then
             echo "modified=true" >> "$GITHUB_OUTPUT"
           fi
       - uses: ./.github/actions/registry-diff
         id: registry-diff
         if: steps.workflow-check.outputs.modified != 'true'
         with:
-          base_sha: ${{ github.event.pull_request.base.sha }}
+          base_sha: ${{ needs.check-changes.outputs.diff-base-sha }}
+          head_sha: ${{ github.event.pull_request.head.sha }}
       - id: determine-tools
         run: |
           if [ "${{ steps.workflow-check.outputs.modified }}" == "true" ]; then