feat: expose GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT

.github/workflows/build.yml

@@ -50,6 +50,7 @@ jobs:
           echo $GITHUB_BASE_REF_SLUG_URL
           echo $GITHUB_EVENT_REF_SLUG_URL
           echo $GITHUB_SHA_SHORT
+          echo $GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT
 
   test-win:
     runs-on: windows-latest
@@ -68,3 +69,4 @@ jobs:
           echo $env:GITHUB_BASE_REF_SLUG_URL
           echo $env:GITHUB_EVENT_REF_SLUG_URL
           echo $env:GITHUB_SHA_SHORT
+          echo $env:GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT

README.md

@@ -41,6 +41,7 @@ Others `Slug`-ish commands are available:
     echo "   repository          : ${{ env.GITHUB_REPOSITORY_SLUG_URL }}"
     echo "Short SHA variables"
     echo "   sha                 : ${{ env.GITHUB_SHA_SHORT }}"
+    echo "   pull request sha    : ${{ env.GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT }}"
 ```
 
 Read [default environment variables][3] page for more information.
@@ -98,6 +99,15 @@ The commit SHA that triggered the workflow
 | ---------------------------------------- | ---------------- |
 | ffac537e6cbbf934b08745a378932722df287a53 | ffac537e         |
 
+### GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT
+
+Short the value of `github.event.pull_request.head.sha` that represents the last commit
+used for triggering an action for a pull request.
+
+| github.event.pull_request.head.sha       | GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT |
+| ---------------------------------------- | ---------------------------------------- |
+| ffac537e6cbbf934b08745a378932722df287a53 | ffac537e                                 |
+
 ### Use slug variable in an URL
 
 In an URL, use `<GITHUB_VARIABLE>_SLUG_URL` instead of **<GITHUB_VARIABLE>\_SLUG** as subdomain to be compliant.

dist/index.js

@@ -116,6 +116,7 @@ const GITHUB_BASE_REF_SLUG_URL = 'GITHUB_BASE_REF_SLUG_URL';
 const GITHUB_SHA_SHORT = 'GITHUB_SHA_SHORT';
 const GITHUB_EVENT_REF_SLUG = 'GITHUB_EVENT_REF_SLUG';
 const GITHUB_EVENT_REF_SLUG_URL = 'GITHUB_EVENT_REF_SLUG_URL';
+const GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT = 'GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT';
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
@@ -126,6 +127,9 @@ function run() {
                     core.exportVariable(GITHUB_EVENT_REF_SLUG, slug_1.slugref(eventData.ref));
                     core.exportVariable(GITHUB_EVENT_REF_SLUG_URL, slug_1.slugurlref(eventData.ref));
                 }
+                else if (eventData.hasOwnProperty('pull_request')) {
+                    core.exportVariable(GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT, slug_1.shortsha(eventData.pull_request.head.sha));
+                }
             }
             exportSlug(GITHUB_REPOSITORY, GITHUB_REPOSITORY_SLUG);
             exportSlugUrl(GITHUB_REPOSITORY, GITHUB_REPOSITORY_SLUG_URL);

package-lock.json

@@ -3625,7 +3625,8 @@
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/growly/-/growly-1.3.0.tgz",
       "integrity": "sha1-8QdIy+dq+WS3yWyTxrzCivEgwIE=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "handlebars": {
       "version": "4.7.6",
@@ -4210,6 +4211,7 @@
       "resolved": "https://registry.npmjs.org/is-wsl/-/is-wsl-2.2.0.tgz",
       "integrity": "sha512-fKzAra0rGJUUBwGBgNkHZuToZcn+TtXHpeCgmkMJMMYx1sQDYaCSyjJBSCa2nH1DGm7s3n1oBnohoVTBaN7Lww==",
       "dev": true,
+      "optional": true,
       "requires": {
         "is-docker": "^2.0.0"
       }
@@ -5589,6 +5591,7 @@
       "resolved": "https://registry.npmjs.org/node-notifier/-/node-notifier-8.0.1.tgz",
       "integrity": "sha512-BvEXF+UmsnAfYfoapKM9nGxnP+Wn7P91YfXmrKnfcYCx6VBeoN5Ez5Ogck6I8Bi5k4RlpqRYaw75pAwzX9OphA==",
       "dev": true,
+      "optional": true,
       "requires": {
         "growly": "^1.3.0",
         "is-wsl": "^2.2.0",
@@ -10396,7 +10399,8 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/shellwords/-/shellwords-0.1.1.tgz",
       "integrity": "sha512-vFwSUfQvqybiICwZY5+DAWIPLKsWO31Q91JSKl3UYv+K5c2QRPzn0qzec6QPu1Qc9eHYItiP3NdJqNVqetYAww==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "signal-exit": {
       "version": "3.0.3",
@@ -11461,7 +11465,8 @@
       "version": "8.3.1",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.1.tgz",
       "integrity": "sha512-FOmRr+FmWEIG8uhZv6C2bTgEVXsHk08kE7mPlrBbEe+c3r9pjceVPgupIfNIhc4yx55H69OXANrUaSuu9eInKg==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "v8-compile-cache": {
       "version": "2.1.1",

src/main.ts

@@ -26,6 +26,8 @@ const GITHUB_BASE_REF_SLUG_URL = 'GITHUB_BASE_REF_SLUG_URL'
 const GITHUB_SHA_SHORT = 'GITHUB_SHA_SHORT'
 const GITHUB_EVENT_REF_SLUG = 'GITHUB_EVENT_REF_SLUG'
 const GITHUB_EVENT_REF_SLUG_URL = 'GITHUB_EVENT_REF_SLUG_URL'
+const GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT =
+  'GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT'
 
 async function run(): Promise<void> {
   try {
@@ -38,6 +40,11 @@ async function run(): Promise<void> {
           GITHUB_EVENT_REF_SLUG_URL,
           slugurlref(eventData.ref)
         )
+      } else if (eventData.hasOwnProperty('pull_request')) {
+        core.exportVariable(
+          GITHUB_EVENT_PULL_REQUEST_HEAD_SHA_SHORT,
+          shortsha(eventData.pull_request.head.sha)
+        )
       }
     }