From b6849436894e144dbce29d7d7fda2ae3bf9d8365 Mon Sep 17 00:00:00 2001
From: Luca Comellini <luca.com@gmail.com>
Date: Thu, 5 Sep 2024 08:57:13 -0700
Subject: [PATCH] Add Ref and Commit outputs (#1180)

Signed-off-by: Luca Comellini <luca.com@gmail.com>
---
 .github/workflows/test.yml | 34 ++++++++++++++++++++++++++++++++++
 action.yml                 |  5 +++++
 dist/index.js              |  4 +++-
 src/git-source-provider.ts |  3 ++-
 src/main.ts                |  1 +
 5 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1ef3c313e..cde9f060e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -295,3 +295,37 @@ jobs:
         uses: actions/checkout@v4.1.6
         with:
           path: localClone
+
+  test-output:
+    runs-on: ubuntu-latest
+    steps:
+      # Clone this repo
+      - name: Checkout
+        uses: actions/checkout@v4.1.6
+
+      # Basic checkout using git
+      - name: Checkout basic
+        id: checkout
+        uses: ./
+        with:
+          ref: test-data/v2/basic
+
+      # Verify output
+      - name: Verify output
+        run: |
+          echo "Commit: ${{ steps.checkout.outputs.commit }}"
+          echo "Ref: ${{ steps.checkout.outputs.ref }}"
+
+          if [ "${{ steps.checkout.outputs.ref }}" != "test-data/v2/basic" ]; then
+            echo "Expected ref to be test-data/v2/basic"
+            exit 1
+          fi
+
+          if [ "${{ steps.checkout.outputs.commit }}" != "82f71901cf8c021332310dcc8cdba84c4193ff5d" ]; then
+            echo "Expected commit to be 82f71901cf8c021332310dcc8cdba84c4193ff5d"
+            exit 1
+          fi
+
+      # needed to make checkout post cleanup succeed
+      - name: Fix Checkout
+        uses: actions/checkout@v4.1.6
diff --git a/action.yml b/action.yml
index 75d5ae2d8..6842eb843 100644
--- a/action.yml
+++ b/action.yml
@@ -98,6 +98,11 @@ inputs:
   github-server-url:
     description: The base URL for the GitHub instance that you are trying to clone from, will use environment defaults to fetch from the same instance that the workflow is running from unless specified. Example URLs are https://github.com or https://my-ghes-server.example.com
     required: false
+outputs:
+  ref:
+    description: 'The branch, tag or SHA that was checked out'
+  commit:
+    description: 'The commit SHA that was checked out'
 runs:
   using: node20
   main: dist/index.js
diff --git a/dist/index.js b/dist/index.js
index 9d959a9ee..ae427a425 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1355,7 +1355,8 @@ function getSource(settings) {
             // Get commit information
             const commitInfo = yield git.log1();
             // Log commit sha
-            yield git.log1("--format='%H'");
+            const commitSHA = yield git.log1('--format=%H');
+            core.setOutput('commit', commitSHA.trim());
             // Check for incorrect pull request merge commit
             yield refHelper.checkCommitInfo(settings.authToken, commitInfo, settings.repositoryOwner, settings.repositoryName, settings.ref, settings.commit, settings.githubServerUrl);
         }
@@ -1897,6 +1898,7 @@ function run() {
                 coreCommand.issueCommand('add-matcher', {}, path.join(__dirname, 'problem-matcher.json'));
                 // Get sources
                 yield gitSourceProvider.getSource(sourceSettings);
+                core.setOutput('ref', sourceSettings.ref);
             }
             finally {
                 // Unregister problem matcher
diff --git a/src/git-source-provider.ts b/src/git-source-provider.ts
index f723d94f4..2d3513897 100644
--- a/src/git-source-provider.ts
+++ b/src/git-source-provider.ts
@@ -261,7 +261,8 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
     const commitInfo = await git.log1()
 
     // Log commit sha
-    await git.log1("--format='%H'")
+    const commitSHA = await git.log1('--format=%H')
+    core.setOutput('commit', commitSHA.trim())
 
     // Check for incorrect pull request merge commit
     await refHelper.checkCommitInfo(
diff --git a/src/main.ts b/src/main.ts
index 97a27af0a..0684c6f5e 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -19,6 +19,7 @@ async function run(): Promise<void> {
 
       // Get sources
       await gitSourceProvider.getSource(sourceSettings)
+      core.setOutput('ref', sourceSettings.ref)
     } finally {
       // Unregister problem matcher
       coreCommand.issueCommand('remove-matcher', {owner: 'checkout-git'}, '')