Merge pull request #91 from crazy-max/pr_target_event

Handle `pull_request_target` event

.github/workflows/ci.yml

@@ -165,6 +165,30 @@ jobs:
             org.opencontainers.image.description=Another description
             org.opencontainers.image.vendor=MyCompany
 
+  json:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Docker meta
+        id: meta
+        uses: ./
+        with:
+          images: |
+            ${{ env.DOCKER_IMAGE }}
+            ghcr.io/name/app
+          labels: |
+            maintainer=CrazyMax
+      -
+        name: JSON output
+        run: |
+          echo "maintainer=${{ fromJSON(steps.meta.outputs.json).labels['maintainer'] }}"
+          echo "version=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}"
+          echo "revision=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.revision'] }}"
+          echo "created=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}"
+
   docker-push:
     runs-on: ubuntu-latest
     services:

README.md

@@ -32,6 +32,7 @@ ___
   * [Latest tag](#latest-tag)
   * [Global expressions](#global-expressions)
   * [Major version zero](#major-version-zero)
+  * [JSON output object](#json-output-object)
   * [Overwrite labels](#overwrite-labels)
 * [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
 
@@ -274,6 +275,7 @@ Following outputs are available
 | `version`     | String  | Docker image version |
 | `tags`        | String  | Docker tags |
 | `labels`      | String  | Docker labels |
+| `json`        | String  | JSON output of tags and labels |
 | `bake-file`   | File    | [Bake definition file](https://github.com/docker/buildx#file-definition) path |
 
 ## `flavor` input
@@ -524,17 +526,19 @@ tags: |
 
 ```yaml
 tags: |
-  # minimal
+  # minimal (short sha)
   type=sha
+  # full length sha
+  type=sha,format=long
 ```
 
-Output Git short commit as Docker tag like `sha-ad132f5`.
+Output Git short commit (or long if specified) as Docker tag like `sha-ad132f5`.
 
 Extended attributes and default values:
 
 ```yaml
 tags: |
-  type=sha,enable=true,priority=100,prefix=sha-,suffix=
+  type=sha,enable=true,priority=100,prefix=sha-,suffix=,format=short
 ```
 
 ## Notes
@@ -584,6 +588,30 @@ tags: |
   type=semver,pattern={{major}},enable=${{ !startsWith(github.ref, 'refs/tags/v0.') }}
 ```
 
+### JSON output object
+
+The `json` output is a JSON object composed of the generated tags and labels so that you can reuse them further in your
+workflow using the [`fromJSON` function](https://docs.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#fromjson):
+
+```yaml
+      -
+        name: Docker meta
+        uses: docker/metadata-action@v3
+        id: meta
+        with:
+          images: name/app
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            BUILDTIME=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}
+            VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
+            REVISION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.revision'] }}
+```
+
 ### Overwrite labels
 
 If some of the [OCI Image Format Specification](https://github.com/opencontainers/image-spec/blob/master/annotations.md)
@@ -592,7 +620,7 @@ labels generated are not suitable, you can overwrite them like this:
 ```yaml
       -
         name: Docker meta
-        id: docker_meta
+        id: meta
         uses: docker/metadata-action@v3
         with:
           images: name/app

__tests__/fixtures/event_pull_request_target.env

@@ -0,0 +1,25 @@
+GITHUB_ACTION=crazy-maxghaction-dump-context
+GITHUB_ACTIONS=true
+GITHUB_ACTION_PATH=/home/runner/work/_actions/crazy-max/ghaction-dump-context/v1
+GITHUB_ACTION_REF=
+GITHUB_ACTION_REPOSITORY=
+GITHUB_ACTOR=crazy-max
+GITHUB_API_URL=https://api.github.com
+GITHUB_BASE_REF=master
+GITHUB_ENV=/home/runner/work/_temp/_runner_file_commands/set_env_cc4da131-0660-4771-8663-0f96c0fc944f
+GITHUB_EVENT_NAME=pull_request_target
+GITHUB_EVENT_PATH=./__tests__/fixtures/event_pull_request_target.json
+GITHUB_GRAPHQL_URL=https://api.github.com/graphql
+GITHUB_HEAD_REF=test-pr-target
+GITHUB_JOB=build
+GITHUB_PATH=/home/runner/work/_temp/_runner_file_commands/add_path_cc4da131-0660-4771-8663-0f96c0fc944f
+GITHUB_REF=refs/heads/master
+GITHUB_REPOSITORY=crazy-max/test-docker-action
+GITHUB_REPOSITORY_OWNER=crazy-max
+GITHUB_RETENTION_DAYS=90
+GITHUB_RUN_ID=867725119
+GITHUB_RUN_NUMBER=12
+GITHUB_SERVER_URL=https://github.com
+GITHUB_SHA=f24900bfcfee76d8055c8421a164c7e57ad20e68
+GITHUB_WORKFLOW=push-ghcr
+GITHUB_WORKSPACE=/home/runner/work/test-docker-action/test-docker-action

__tests__/fixtures/event_pull_request_target.json

@@ -0,0 +1,476 @@
+{
+  "action": "synchronize",
+  "after": "57a8fb29acfb3c1e27c66226a8993fb4ef722e26",
+  "before": "18c4c149d695bdeba42643ef8343a6b8e466970c",
+  "number": 8,
+  "pull_request": {
+    "_links": {
+      "comments": {
+        "href": "https://api.github.com/repos/crazy-max/test-docker-action/issues/8/comments"
+      },
+      "commits": {
+        "href": "https://api.github.com/repos/crazy-max/test-docker-action/pulls/8/commits"
+      },
+      "html": {
+        "href": "https://github.com/crazy-max/test-docker-action/pull/8"
+      },
+      "issue": {
+        "href": "https://api.github.com/repos/crazy-max/test-docker-action/issues/8"
+      },
+      "review_comment": {
+        "href": "https://api.github.com/repos/crazy-max/test-docker-action/pulls/comments{/number}"
+      },
+      "review_comments": {
+        "href": "https://api.github.com/repos/crazy-max/test-docker-action/pulls/8/comments"
+      },
+      "self": {
+        "href": "https://api.github.com/repos/crazy-max/test-docker-action/pulls/8"
+      },
+      "statuses": {
+        "href": "https://api.github.com/repos/crazy-max/test-docker-action/statuses/57a8fb29acfb3c1e27c66226a8993fb4ef722e26"
+      }
+    },
+    "active_lock_reason": null,
+    "additions": 1,
+    "assignee": null,
+    "assignees": [],
+    "author_association": "OWNER",
+    "auto_merge": null,
+    "base": {
+      "label": "crazy-max:master",
+      "ref": "master",
+      "repo": {
+        "allow_merge_commit": true,
+        "allow_rebase_merge": true,
+        "allow_squash_merge": true,
+        "archive_url": "https://api.github.com/repos/crazy-max/test-docker-action/{archive_format}{/ref}",
+        "archived": false,
+        "assignees_url": "https://api.github.com/repos/crazy-max/test-docker-action/assignees{/user}",
+        "blobs_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/blobs{/sha}",
+        "branches_url": "https://api.github.com/repos/crazy-max/test-docker-action/branches{/branch}",
+        "clone_url": "https://github.com/crazy-max/test-docker-action.git",
+        "collaborators_url": "https://api.github.com/repos/crazy-max/test-docker-action/collaborators{/collaborator}",
+        "comments_url": "https://api.github.com/repos/crazy-max/test-docker-action/comments{/number}",
+        "commits_url": "https://api.github.com/repos/crazy-max/test-docker-action/commits{/sha}",
+        "compare_url": "https://api.github.com/repos/crazy-max/test-docker-action/compare/{base}...{head}",
+        "contents_url": "https://api.github.com/repos/crazy-max/test-docker-action/contents/{+path}",
+        "contributors_url": "https://api.github.com/repos/crazy-max/test-docker-action/contributors",
+        "created_at": "2020-08-07T09:23:00Z",
+        "default_branch": "master",
+        "delete_branch_on_merge": false,
+        "deployments_url": "https://api.github.com/repos/crazy-max/test-docker-action/deployments",
+        "description": "Test \"Docker\" Actions",
+        "disabled": false,
+        "downloads_url": "https://api.github.com/repos/crazy-max/test-docker-action/downloads",
+        "events_url": "https://api.github.com/repos/crazy-max/test-docker-action/events",
+        "fork": false,
+        "forks": 4,
+        "forks_count": 4,
+        "forks_url": "https://api.github.com/repos/crazy-max/test-docker-action/forks",
+        "full_name": "crazy-max/test-docker-action",
+        "git_commits_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/commits{/sha}",
+        "git_refs_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/refs{/sha}",
+        "git_tags_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/tags{/sha}",
+        "git_url": "git://github.com/crazy-max/test-docker-action.git",
+        "has_downloads": true,
+        "has_issues": false,
+        "has_pages": false,
+        "has_projects": false,
+        "has_wiki": false,
+        "homepage": "",
+        "hooks_url": "https://api.github.com/repos/crazy-max/test-docker-action/hooks",
+        "html_url": "https://github.com/crazy-max/test-docker-action",
+        "id": 285789493,
+        "issue_comment_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues/comments{/number}",
+        "issue_events_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues/events{/number}",
+        "issues_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues{/number}",
+        "keys_url": "https://api.github.com/repos/crazy-max/test-docker-action/keys{/key_id}",
+        "labels_url": "https://api.github.com/repos/crazy-max/test-docker-action/labels{/name}",
+        "language": "Dockerfile",
+        "languages_url": "https://api.github.com/repos/crazy-max/test-docker-action/languages",
+        "license": {
+          "key": "mit",
+          "name": "MIT License",
+          "node_id": "MDc6TGljZW5zZTEz",
+          "spdx_id": "MIT",
+          "url": "https://api.github.com/licenses/mit"
+        },
+        "merges_url": "https://api.github.com/repos/crazy-max/test-docker-action/merges",
+        "milestones_url": "https://api.github.com/repos/crazy-max/test-docker-action/milestones{/number}",
+        "mirror_url": null,
+        "name": "test-docker-action",
+        "node_id": "MDEwOlJlcG9zaXRvcnkyODU3ODk0OTM=",
+        "notifications_url": "https://api.github.com/repos/crazy-max/test-docker-action/notifications{?since,all,participating}",
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+          "events_url": "https://api.github.com/users/crazy-max/events{/privacy}",
+          "followers_url": "https://api.github.com/users/crazy-max/followers",
+          "following_url": "https://api.github.com/users/crazy-max/following{/other_user}",
+          "gists_url": "https://api.github.com/users/crazy-max/gists{/gist_id}",
+          "gravatar_id": "",
+          "html_url": "https://github.com/crazy-max",
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+          "login": "crazy-max",
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+          "organizations_url": "https://api.github.com/users/crazy-max/orgs",
+          "received_events_url": "https://api.github.com/users/crazy-max/received_events",
+          "repos_url": "https://api.github.com/users/crazy-max/repos",
+          "site_admin": false,
+          "starred_url": "https://api.github.com/users/crazy-max/starred{/owner}{/repo}",
+          "subscriptions_url": "https://api.github.com/users/crazy-max/subscriptions",
+          "type": "User",
+          "url": "https://api.github.com/users/crazy-max"
+        },
+        "private": false,
+        "pulls_url": "https://api.github.com/repos/crazy-max/test-docker-action/pulls{/number}",
+        "pushed_at": "2021-05-23T01:38:41Z",
+        "releases_url": "https://api.github.com/repos/crazy-max/test-docker-action/releases{/id}",
+        "size": 137,
+        "ssh_url": "git@github.com:crazy-max/test-docker-action.git",
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+        "stargazers_url": "https://api.github.com/repos/crazy-max/test-docker-action/stargazers",
+        "statuses_url": "https://api.github.com/repos/crazy-max/test-docker-action/statuses/{sha}",
+        "subscribers_url": "https://api.github.com/repos/crazy-max/test-docker-action/subscribers",
+        "subscription_url": "https://api.github.com/repos/crazy-max/test-docker-action/subscription",
+        "svn_url": "https://github.com/crazy-max/test-docker-action",
+        "tags_url": "https://api.github.com/repos/crazy-max/test-docker-action/tags",
+        "teams_url": "https://api.github.com/repos/crazy-max/test-docker-action/teams",
+        "trees_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/trees{/sha}",
+        "updated_at": "2021-05-23T01:37:33Z",
+        "url": "https://api.github.com/repos/crazy-max/test-docker-action",
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+        "events_url": "https://api.github.com/users/crazy-max/events{/privacy}",
+        "followers_url": "https://api.github.com/users/crazy-max/followers",
+        "following_url": "https://api.github.com/users/crazy-max/following{/other_user}",
+        "gists_url": "https://api.github.com/users/crazy-max/gists{/gist_id}",
+        "gravatar_id": "",
+        "html_url": "https://github.com/crazy-max",
+        "id": 1951866,
+        "login": "crazy-max",
+        "node_id": "MDQ6VXNlcjE5NTE4NjY=",
+        "organizations_url": "https://api.github.com/users/crazy-max/orgs",
+        "received_events_url": "https://api.github.com/users/crazy-max/received_events",
+        "repos_url": "https://api.github.com/users/crazy-max/repos",
+        "site_admin": false,
+        "starred_url": "https://api.github.com/users/crazy-max/starred{/owner}{/repo}",
+        "subscriptions_url": "https://api.github.com/users/crazy-max/subscriptions",
+        "type": "User",
+        "url": "https://api.github.com/users/crazy-max"
+      }
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+    "changed_files": 1,
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+    "comments": 0,
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+    "deletions": 1,
+    "diff_url": "https://github.com/crazy-max/test-docker-action/pull/8.diff",
+    "draft": false,
+    "head": {
+      "label": "crazy-max:test-pr-target",
+      "ref": "test-pr-target",
+      "repo": {
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+        "allow_rebase_merge": true,
+        "allow_squash_merge": true,
+        "archive_url": "https://api.github.com/repos/crazy-max/test-docker-action/{archive_format}{/ref}",
+        "archived": false,
+        "assignees_url": "https://api.github.com/repos/crazy-max/test-docker-action/assignees{/user}",
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+        "branches_url": "https://api.github.com/repos/crazy-max/test-docker-action/branches{/branch}",
+        "clone_url": "https://github.com/crazy-max/test-docker-action.git",
+        "collaborators_url": "https://api.github.com/repos/crazy-max/test-docker-action/collaborators{/collaborator}",
+        "comments_url": "https://api.github.com/repos/crazy-max/test-docker-action/comments{/number}",
+        "commits_url": "https://api.github.com/repos/crazy-max/test-docker-action/commits{/sha}",
+        "compare_url": "https://api.github.com/repos/crazy-max/test-docker-action/compare/{base}...{head}",
+        "contents_url": "https://api.github.com/repos/crazy-max/test-docker-action/contents/{+path}",
+        "contributors_url": "https://api.github.com/repos/crazy-max/test-docker-action/contributors",
+        "created_at": "2020-08-07T09:23:00Z",
+        "default_branch": "master",
+        "delete_branch_on_merge": false,
+        "deployments_url": "https://api.github.com/repos/crazy-max/test-docker-action/deployments",
+        "description": "Test \"Docker\" Actions",
+        "disabled": false,
+        "downloads_url": "https://api.github.com/repos/crazy-max/test-docker-action/downloads",
+        "events_url": "https://api.github.com/repos/crazy-max/test-docker-action/events",
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+        "git_url": "git://github.com/crazy-max/test-docker-action.git",
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+        "has_wiki": false,
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+        "hooks_url": "https://api.github.com/repos/crazy-max/test-docker-action/hooks",
+        "html_url": "https://github.com/crazy-max/test-docker-action",
+        "id": 285789493,
+        "issue_comment_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues/comments{/number}",
+        "issue_events_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues/events{/number}",
+        "issues_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues{/number}",
+        "keys_url": "https://api.github.com/repos/crazy-max/test-docker-action/keys{/key_id}",
+        "labels_url": "https://api.github.com/repos/crazy-max/test-docker-action/labels{/name}",
+        "language": "Dockerfile",
+        "languages_url": "https://api.github.com/repos/crazy-max/test-docker-action/languages",
+        "license": {
+          "key": "mit",
+          "name": "MIT License",
+          "node_id": "MDc6TGljZW5zZTEz",
+          "spdx_id": "MIT",
+          "url": "https://api.github.com/licenses/mit"
+        },
+        "merges_url": "https://api.github.com/repos/crazy-max/test-docker-action/merges",
+        "milestones_url": "https://api.github.com/repos/crazy-max/test-docker-action/milestones{/number}",
+        "mirror_url": null,
+        "name": "test-docker-action",
+        "node_id": "MDEwOlJlcG9zaXRvcnkyODU3ODk0OTM=",
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+        "open_issues_count": 4,
+        "owner": {
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+          "organizations_url": "https://api.github.com/users/crazy-max/orgs",
+          "received_events_url": "https://api.github.com/users/crazy-max/received_events",
+          "repos_url": "https://api.github.com/users/crazy-max/repos",
+          "site_admin": false,
+          "starred_url": "https://api.github.com/users/crazy-max/starred{/owner}{/repo}",
+          "subscriptions_url": "https://api.github.com/users/crazy-max/subscriptions",
+          "type": "User",
+          "url": "https://api.github.com/users/crazy-max"
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+        "pulls_url": "https://api.github.com/repos/crazy-max/test-docker-action/pulls{/number}",
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+        "releases_url": "https://api.github.com/repos/crazy-max/test-docker-action/releases{/id}",
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+        "ssh_url": "git@github.com:crazy-max/test-docker-action.git",
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+        "stargazers_url": "https://api.github.com/repos/crazy-max/test-docker-action/stargazers",
+        "statuses_url": "https://api.github.com/repos/crazy-max/test-docker-action/statuses/{sha}",
+        "subscribers_url": "https://api.github.com/repos/crazy-max/test-docker-action/subscribers",
+        "subscription_url": "https://api.github.com/repos/crazy-max/test-docker-action/subscription",
+        "svn_url": "https://github.com/crazy-max/test-docker-action",
+        "tags_url": "https://api.github.com/repos/crazy-max/test-docker-action/tags",
+        "teams_url": "https://api.github.com/repos/crazy-max/test-docker-action/teams",
+        "trees_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/trees{/sha}",
+        "updated_at": "2021-05-23T01:37:33Z",
+        "url": "https://api.github.com/repos/crazy-max/test-docker-action",
+        "watchers": 3,
+        "watchers_count": 3
+      },
+      "sha": "57a8fb29acfb3c1e27c66226a8993fb4ef722e26",
+      "user": {
+        "avatar_url": "https://avatars.githubusercontent.com/u/1951866?v=4",
+        "events_url": "https://api.github.com/users/crazy-max/events{/privacy}",
+        "followers_url": "https://api.github.com/users/crazy-max/followers",
+        "following_url": "https://api.github.com/users/crazy-max/following{/other_user}",
+        "gists_url": "https://api.github.com/users/crazy-max/gists{/gist_id}",
+        "gravatar_id": "",
+        "html_url": "https://github.com/crazy-max",
+        "id": 1951866,
+        "login": "crazy-max",
+        "node_id": "MDQ6VXNlcjE5NTE4NjY=",
+        "organizations_url": "https://api.github.com/users/crazy-max/orgs",
+        "received_events_url": "https://api.github.com/users/crazy-max/received_events",
+        "repos_url": "https://api.github.com/users/crazy-max/repos",
+        "site_admin": false,
+        "starred_url": "https://api.github.com/users/crazy-max/starred{/owner}{/repo}",
+        "subscriptions_url": "https://api.github.com/users/crazy-max/subscriptions",
+        "type": "User",
+        "url": "https://api.github.com/users/crazy-max"
+      }
+    },
+    "html_url": "https://github.com/crazy-max/test-docker-action/pull/8",
+    "id": 650710002,
+    "issue_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues/8",
+    "labels": [],
+    "locked": false,
+    "maintainer_can_modify": false,
+    "merge_commit_sha": "823b99c3c3cf5421e6ff0514b13a44bf21c7a4f0",
+    "mergeable": null,
+    "mergeable_state": "unknown",
+    "merged": false,
+    "merged_at": null,
+    "merged_by": null,
+    "milestone": null,
+    "node_id": "MDExOlB1bGxSZXF1ZXN0NjUwNzEwMDAy",
+    "number": 8,
+    "patch_url": "https://github.com/crazy-max/test-docker-action/pull/8.patch",
+    "rebaseable": null,
+    "requested_reviewers": [],
+    "requested_teams": [],
+    "review_comment_url": "https://api.github.com/repos/crazy-max/test-docker-action/pulls/comments{/number}",
+    "review_comments": 0,
+    "review_comments_url": "https://api.github.com/repos/crazy-max/test-docker-action/pulls/8/comments",
+    "state": "open",
+    "statuses_url": "https://api.github.com/repos/crazy-max/test-docker-action/statuses/57a8fb29acfb3c1e27c66226a8993fb4ef722e26",
+    "title": "Test PR target",
+    "updated_at": "2021-05-23T01:38:42Z",
+    "url": "https://api.github.com/repos/crazy-max/test-docker-action/pulls/8",
+    "user": {
+      "avatar_url": "https://avatars.githubusercontent.com/u/1951866?v=4",
+      "events_url": "https://api.github.com/users/crazy-max/events{/privacy}",
+      "followers_url": "https://api.github.com/users/crazy-max/followers",
+      "following_url": "https://api.github.com/users/crazy-max/following{/other_user}",
+      "gists_url": "https://api.github.com/users/crazy-max/gists{/gist_id}",
+      "gravatar_id": "",
+      "html_url": "https://github.com/crazy-max",
+      "id": 1951866,
+      "login": "crazy-max",
+      "node_id": "MDQ6VXNlcjE5NTE4NjY=",
+      "organizations_url": "https://api.github.com/users/crazy-max/orgs",
+      "received_events_url": "https://api.github.com/users/crazy-max/received_events",
+      "repos_url": "https://api.github.com/users/crazy-max/repos",
+      "site_admin": false,
+      "starred_url": "https://api.github.com/users/crazy-max/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/crazy-max/subscriptions",
+      "type": "User",
+      "url": "https://api.github.com/users/crazy-max"
+    }
+  },
+  "repository": {
+    "archive_url": "https://api.github.com/repos/crazy-max/test-docker-action/{archive_format}{/ref}",
+    "archived": false,
+    "assignees_url": "https://api.github.com/repos/crazy-max/test-docker-action/assignees{/user}",
+    "blobs_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/blobs{/sha}",
+    "branches_url": "https://api.github.com/repos/crazy-max/test-docker-action/branches{/branch}",
+    "clone_url": "https://github.com/crazy-max/test-docker-action.git",
+    "collaborators_url": "https://api.github.com/repos/crazy-max/test-docker-action/collaborators{/collaborator}",
+    "comments_url": "https://api.github.com/repos/crazy-max/test-docker-action/comments{/number}",
+    "commits_url": "https://api.github.com/repos/crazy-max/test-docker-action/commits{/sha}",
+    "compare_url": "https://api.github.com/repos/crazy-max/test-docker-action/compare/{base}...{head}",
+    "contents_url": "https://api.github.com/repos/crazy-max/test-docker-action/contents/{+path}",
+    "contributors_url": "https://api.github.com/repos/crazy-max/test-docker-action/contributors",
+    "created_at": "2020-08-07T09:23:00Z",
+    "default_branch": "master",
+    "deployments_url": "https://api.github.com/repos/crazy-max/test-docker-action/deployments",
+    "description": "Test \"Docker\" Actions",
+    "disabled": false,
+    "downloads_url": "https://api.github.com/repos/crazy-max/test-docker-action/downloads",
+    "events_url": "https://api.github.com/repos/crazy-max/test-docker-action/events",
+    "fork": false,
+    "forks": 4,
+    "forks_count": 4,
+    "forks_url": "https://api.github.com/repos/crazy-max/test-docker-action/forks",
+    "full_name": "crazy-max/test-docker-action",
+    "git_commits_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/commits{/sha}",
+    "git_refs_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/refs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/tags{/sha}",
+    "git_url": "git://github.com/crazy-max/test-docker-action.git",
+    "has_downloads": true,
+    "has_issues": false,
+    "has_pages": false,
+    "has_projects": false,
+    "has_wiki": false,
+    "homepage": "",
+    "hooks_url": "https://api.github.com/repos/crazy-max/test-docker-action/hooks",
+    "html_url": "https://github.com/crazy-max/test-docker-action",
+    "id": 285789493,
+    "issue_comment_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues/comments{/number}",
+    "issue_events_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues/events{/number}",
+    "issues_url": "https://api.github.com/repos/crazy-max/test-docker-action/issues{/number}",
+    "keys_url": "https://api.github.com/repos/crazy-max/test-docker-action/keys{/key_id}",
+    "labels_url": "https://api.github.com/repos/crazy-max/test-docker-action/labels{/name}",
+    "language": "Dockerfile",
+    "languages_url": "https://api.github.com/repos/crazy-max/test-docker-action/languages",
+    "license": {
+      "key": "mit",
+      "name": "MIT License",
+      "node_id": "MDc6TGljZW5zZTEz",
+      "spdx_id": "MIT",
+      "url": "https://api.github.com/licenses/mit"
+    },
+    "merges_url": "https://api.github.com/repos/crazy-max/test-docker-action/merges",
+    "milestones_url": "https://api.github.com/repos/crazy-max/test-docker-action/milestones{/number}",
+    "mirror_url": null,
+    "name": "test-docker-action",
+    "node_id": "MDEwOlJlcG9zaXRvcnkyODU3ODk0OTM=",
+    "notifications_url": "https://api.github.com/repos/crazy-max/test-docker-action/notifications{?since,all,participating}",
+    "open_issues": 4,
+    "open_issues_count": 4,
+    "owner": {
+      "avatar_url": "https://avatars.githubusercontent.com/u/1951866?v=4",
+      "events_url": "https://api.github.com/users/crazy-max/events{/privacy}",
+      "followers_url": "https://api.github.com/users/crazy-max/followers",
+      "following_url": "https://api.github.com/users/crazy-max/following{/other_user}",
+      "gists_url": "https://api.github.com/users/crazy-max/gists{/gist_id}",
+      "gravatar_id": "",
+      "html_url": "https://github.com/crazy-max",
+      "id": 1951866,
+      "login": "crazy-max",
+      "node_id": "MDQ6VXNlcjE5NTE4NjY=",
+      "organizations_url": "https://api.github.com/users/crazy-max/orgs",
+      "received_events_url": "https://api.github.com/users/crazy-max/received_events",
+      "repos_url": "https://api.github.com/users/crazy-max/repos",
+      "site_admin": false,
+      "starred_url": "https://api.github.com/users/crazy-max/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/crazy-max/subscriptions",
+      "type": "User",
+      "url": "https://api.github.com/users/crazy-max"
+    },
+    "private": false,
+    "pulls_url": "https://api.github.com/repos/crazy-max/test-docker-action/pulls{/number}",
+    "pushed_at": "2021-05-23T01:38:41Z",
+    "releases_url": "https://api.github.com/repos/crazy-max/test-docker-action/releases{/id}",
+    "size": 137,
+    "ssh_url": "git@github.com:crazy-max/test-docker-action.git",
+    "stargazers_count": 3,
+    "stargazers_url": "https://api.github.com/repos/crazy-max/test-docker-action/stargazers",
+    "statuses_url": "https://api.github.com/repos/crazy-max/test-docker-action/statuses/{sha}",
+    "subscribers_url": "https://api.github.com/repos/crazy-max/test-docker-action/subscribers",
+    "subscription_url": "https://api.github.com/repos/crazy-max/test-docker-action/subscription",
+    "svn_url": "https://github.com/crazy-max/test-docker-action",
+    "tags_url": "https://api.github.com/repos/crazy-max/test-docker-action/tags",
+    "teams_url": "https://api.github.com/repos/crazy-max/test-docker-action/teams",
+    "trees_url": "https://api.github.com/repos/crazy-max/test-docker-action/git/trees{/sha}",
+    "updated_at": "2021-05-23T01:37:33Z",
+    "url": "https://api.github.com/repos/crazy-max/test-docker-action",
+    "watchers": 3,
+    "watchers_count": 3
+  },
+  "sender": {
+    "avatar_url": "https://avatars.githubusercontent.com/u/1951866?v=4",
+    "events_url": "https://api.github.com/users/crazy-max/events{/privacy}",
+    "followers_url": "https://api.github.com/users/crazy-max/followers",
+    "following_url": "https://api.github.com/users/crazy-max/following{/other_user}",
+    "gists_url": "https://api.github.com/users/crazy-max/gists{/gist_id}",
+    "gravatar_id": "",
+    "html_url": "https://github.com/crazy-max",
+    "id": 1951866,
+    "login": "crazy-max",
+    "node_id": "MDQ6VXNlcjE5NTE4NjY=",
+    "organizations_url": "https://api.github.com/users/crazy-max/orgs",
+    "received_events_url": "https://api.github.com/users/crazy-max/received_events",
+    "repos_url": "https://api.github.com/users/crazy-max/repos",
+    "site_admin": false,
+    "starred_url": "https://api.github.com/users/crazy-max/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/crazy-max/subscriptions",
+    "type": "User",
+    "url": "https://api.github.com/users/crazy-max"
+  }
+}

__tests__/meta.test.ts

@@ -617,7 +617,39 @@ describe('push', () => {
         "org.opencontainers.image.revision=90dd6032fac8bda1b6c4436a2e65de27961ed071",
         "org.opencontainers.image.licenses=MIT"
       ]
-    ]
+    ],
+    [
+      'push18',
+        'event_push.env',
+        {
+          images: ['org/app', 'ghcr.io/user/app'],
+          tags: [
+            `type=ref,event=branch`,
+            `type=sha,format=long`
+          ],
+        } as Inputs,
+        {
+          main: 'dev',
+          partial: ['sha-90dd6032fac8bda1b6c4436a2e65de27961ed071'],
+          latest: false
+        } as Version,
+        [
+          'org/app:dev',
+          'org/app:sha-90dd6032fac8bda1b6c4436a2e65de27961ed071',
+          'ghcr.io/user/app:dev',
+          'ghcr.io/user/app:sha-90dd6032fac8bda1b6c4436a2e65de27961ed071'
+        ],
+        [
+          "org.opencontainers.image.title=Hello-World",
+          "org.opencontainers.image.description=This your first repo!",
+          "org.opencontainers.image.url=https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source=https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.version=dev",
+          "org.opencontainers.image.created=2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision=90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses=MIT"
+        ]
+      ],
   ])('given %p with %p event', tagsLabelsTest);
 });
 
@@ -1744,6 +1776,71 @@ describe('pr', () => {
         "org.opencontainers.image.revision=1e9249f05bfc090e0688b8fb9c1b347586add504",
         "org.opencontainers.image.licenses=MIT"
       ]
+    ],
+    [
+      'pr07',
+      'event_pull_request_target.env',
+      {
+        images: ['org/app', 'ghcr.io/user/app'],
+        tags: [
+          `type=sha,priority=2000`,
+          `type=ref,event=pr`
+        ]
+      } as Inputs,
+      {
+        main: 'sha-f24900b',
+        partial: ['pr-8'],
+        latest: false
+      } as Version,
+      [
+        'org/app:sha-f24900b',
+        'org/app:pr-8',
+        'ghcr.io/user/app:sha-f24900b',
+        'ghcr.io/user/app:pr-8'
+      ],
+      [
+        "org.opencontainers.image.title=Hello-World",
+        "org.opencontainers.image.description=This your first repo!",
+        "org.opencontainers.image.url=https://github.com/octocat/Hello-World",
+        "org.opencontainers.image.source=https://github.com/octocat/Hello-World",
+        "org.opencontainers.image.version=sha-f24900b",
+        "org.opencontainers.image.created=2020-01-10T00:30:00.000Z",
+        "org.opencontainers.image.revision=f24900bfcfee76d8055c8421a164c7e57ad20e68",
+        "org.opencontainers.image.licenses=MIT"
+      ]
+    ],
+    [
+      'pr08',
+      'event_pull_request_target.env',
+      {
+        images: ['org/app', 'ghcr.io/user/app'],
+        tags: [
+          `type=ref,event=pr,prefix=`
+        ],
+        flavor: [
+          `prefix=glo-`,
+          `suffix=-bal`
+        ]
+      } as Inputs,
+      {
+        main: '8-bal',
+        partial: [],
+        latest: false
+      } as Version,
+      [
+        'org/app:8-bal',
+        'ghcr.io/user/app:8-bal'
+      ],
+      [
+        "org.opencontainers.image.title=Hello-World",
+        "org.opencontainers.image.description=This your first repo!",
+        "org.opencontainers.image.url=https://github.com/octocat/Hello-World",
+        "org.opencontainers.image.source=https://github.com/octocat/Hello-World",
+        "org.opencontainers.image.version=8-bal",
+        "org.opencontainers.image.created=2020-01-10T00:30:00.000Z",
+        "org.opencontainers.image.revision=f24900bfcfee76d8055c8421a164c7e57ad20e68",
+        "org.opencontainers.image.licenses=MIT"
+      ]
     ]
   ])('given %p with %p event', tagsLabelsTest);
 });
@@ -2362,6 +2459,258 @@ describe('raw', () => {
   ])('given %p wth %p event', tagsLabelsTest);
 });
 
+describe('json', () => {
+  // prettier-ignore
+  test.each([
+    [
+      'json01',
+      'event_push.env',
+      {
+        images: ['user/app'],
+        tags: [
+          `type=ref,event=branch`,
+          `type=raw,my`,
+          `type=raw,custom`,
+          `type=raw,tags`
+        ],
+        labels: [
+          "invalid"
+        ]
+      } as Inputs,
+      {
+        "tags": [
+          "user/app:dev",
+          "user/app:my",
+          "user/app:custom",
+          "user/app:tags"
+        ],
+        "labels": {
+          "org.opencontainers.image.title": "Hello-World",
+          "org.opencontainers.image.description": "This your first repo!",
+          "org.opencontainers.image.url": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.version": "dev",
+          "org.opencontainers.image.created": "2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision": "90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses": "MIT"
+        }
+      }
+    ],
+    [
+      'json02',
+      'event_push.env',
+      {
+        images: ['user/app'],
+        tags: [
+          `type=ref,event=branch`,
+          `type=raw,my`
+        ]
+      } as Inputs,
+      {
+        "tags": [
+          "user/app:dev",
+          "user/app:my",
+        ],
+        "labels": {
+          "org.opencontainers.image.title": "Hello-World",
+          "org.opencontainers.image.description": "This your first repo!",
+          "org.opencontainers.image.url": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.version": "dev",
+          "org.opencontainers.image.created": "2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision": "90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses": "MIT"
+        }
+      }
+    ],
+    [
+      'json03',
+      'event_tag_release1.env',
+      {
+        images: ['user/app'],
+        tags: [
+          `type=ref,event=tag`,
+          `type=raw,my`,
+          `type=raw,custom`,
+          `type=raw,tags`
+        ],
+        bakeTarget: "meta"
+      } as Inputs,
+      {
+        "tags": [
+          "user/app:release1",
+          "user/app:my",
+          "user/app:custom",
+          "user/app:tags",
+          "user/app:latest"
+        ],
+        "labels": {
+          "org.opencontainers.image.title": "Hello-World",
+          "org.opencontainers.image.description": "This your first repo!",
+          "org.opencontainers.image.url": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.version": "release1",
+          "org.opencontainers.image.created": "2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision": "90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses": "MIT"
+        }
+      }
+    ],
+    [
+      'json04',
+      'event_tag_20200110-RC2.env',
+      {
+        images: ['user/app'],
+        tags: [
+          `type=match,pattern=\\d{8}`,
+          `type=raw,my`,
+          `type=raw,custom`,
+          `type=raw,tags`
+        ],
+        flavor: [
+          `latest=false`
+        ]
+      } as Inputs,
+      {
+        "tags": [
+          "user/app:20200110",
+          "user/app:my",
+          "user/app:custom",
+          "user/app:tags"
+        ],
+        "labels": {
+          "org.opencontainers.image.title": "Hello-World",
+          "org.opencontainers.image.description": "This your first repo!",
+          "org.opencontainers.image.url": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.version": "20200110",
+          "org.opencontainers.image.created": "2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision": "90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses": "MIT"
+        }
+      }
+    ],
+    [
+      'json05',
+      'event_tag_v1.1.1.env',
+      {
+        images: ['org/app', 'ghcr.io/user/app'],
+        tags: [
+          `type=semver,pattern={{version}}`,
+          `type=semver,pattern={{major}}.{{minor}}`,
+          `type=semver,pattern={{major}}`,
+          `type=raw,my`,
+          `type=raw,custom`,
+          `type=raw,tags`
+        ]
+      } as Inputs,
+      {
+        "tags": [
+          "org/app:1.1.1",
+          "org/app:1.1",
+          "org/app:1",
+          "org/app:my",
+          "org/app:custom",
+          "org/app:tags",
+          "org/app:latest",
+          "ghcr.io/user/app:1.1.1",
+          "ghcr.io/user/app:1.1",
+          "ghcr.io/user/app:1",
+          "ghcr.io/user/app:my",
+          "ghcr.io/user/app:custom",
+          "ghcr.io/user/app:tags",
+          "ghcr.io/user/app:latest"
+        ],
+        "labels": {
+          "org.opencontainers.image.title": "Hello-World",
+          "org.opencontainers.image.description": "This your first repo!",
+          "org.opencontainers.image.url": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.version": "1.1.1",
+          "org.opencontainers.image.created": "2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision": "90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses": "MIT"
+        }
+      }
+    ],
+    [
+      'json06',
+      'event_tag_v1.1.1.env',
+      {
+        images: ['org/app', 'ghcr.io/user/app'],
+        tags: [
+          `type=raw,my`,
+          `type=raw,custom`,
+          `type=raw,tags`
+        ]
+      } as Inputs,
+      {
+        "tags": [
+          "org/app:my",
+          "org/app:custom",
+          "org/app:tags",
+          "ghcr.io/user/app:my",
+          "ghcr.io/user/app:custom",
+          "ghcr.io/user/app:tags"
+        ],
+        "labels": {
+          "org.opencontainers.image.title": "Hello-World",
+          "org.opencontainers.image.description": "This your first repo!",
+          "org.opencontainers.image.url": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.version": "my",
+          "org.opencontainers.image.created": "2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision": "90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses": "MIT"
+        }
+      }
+    ],
+    [
+      'json07',
+      'event_tag_v1.1.1.env',
+      {
+        images: ['org/app'],
+        labels: [
+          "foo",
+          "maintainer=CrazyMax",
+          "org.opencontainers.image.title=MyCustom=Title",
+          "org.opencontainers.image.description=Another description",
+          "org.opencontainers.image.vendor=MyCompany",
+        ],
+      } as Inputs,
+      {
+        "tags": [
+          "org/app:v1.1.1",
+          "org/app:latest"
+        ],
+        "labels": {
+          "maintainer": "CrazyMax",
+          "org.opencontainers.image.title": "MyCustom=Title",
+          "org.opencontainers.image.description": "Another description",
+          "org.opencontainers.image.url": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source": "https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.vendor": "MyCompany",
+          "org.opencontainers.image.version": "v1.1.1",
+          "org.opencontainers.image.created": "2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision": "90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses": "MIT"
+        }
+      }
+    ]
+  ])('given %p with %p event', async (name: string, envFile: string, inputs: Inputs, exJSON: {}) => {
+    process.env = dotenv.parse(fs.readFileSync(path.join(__dirname, 'fixtures', envFile)));
+    const context = github.context();
+    console.log(process.env, context);
+
+    const repo = await github.repo(process.env.GITHUB_TOKEN || '');
+    const meta = new Meta({...getInputs(), ...inputs}, context, repo);
+
+    const jsonOutput = meta.getJSON();
+    console.log('json', jsonOutput);
+    expect(jsonOutput).toEqual(exJSON);
+  });
+});
+
 describe('bake', () => {
   // prettier-ignore
   test.each([

__tests__/tag.test.ts

@@ -1,4 +1,4 @@
-import {Transform, Parse, Tag, Type, RefEvent, DefaultPriorities} from '../src/tag';
+import {Transform, Parse, Tag, Type, RefEvent, ShaFormat, DefaultPriorities} from '../src/tag';
 
 describe('transform', () => {
   // prettier-ignore
@@ -89,7 +89,8 @@ describe('transform', () => {
           attrs: {
             "priority": DefaultPriorities[Type.Sha],
             "enable": "true",
-            "prefix": "sha-"
+            "prefix": "sha-",
+            "format": ShaFormat.Short
           }
         }
       ] as Tag[],
@@ -355,7 +356,21 @@ describe('parse', () => {
         attrs: {
           "priority": DefaultPriorities[Type.Sha],
           "enable": "true",
-          "prefix": "sha-"
+          "prefix": "sha-",
+          "format": ShaFormat.Short
+        }
+      } as Tag,
+      false
+    ],
+    [
+      `type=sha,format=long`,
+      {
+        type: Type.Sha,
+        attrs: {
+          "priority": DefaultPriorities[Type.Sha],
+          "enable": "true",
+          "prefix": "sha-",
+          "format": ShaFormat.Long
         }
       } as Tag,
       false
@@ -367,7 +382,8 @@ describe('parse', () => {
         attrs: {
           "priority": DefaultPriorities[Type.Sha],
           "enable": "true",
-          "prefix": ""
+          "prefix": "",
+          "format": ShaFormat.Short
         }
       } as Tag,
       false
@@ -379,7 +395,8 @@ describe('parse', () => {
         attrs: {
           "priority": DefaultPriorities[Type.Sha],
           "enable": "false",
-          "prefix": "sha-"
+          "prefix": "sha-",
+          "format": ShaFormat.Short
         }
       } as Tag,
       false
@@ -403,6 +420,11 @@ describe('parse', () => {
       `type=sha,enable=foo`,
       {} as Tag,
       true
+    ],
+    [
+      `type=sha,format=foo`,
+      {} as Tag,
+      true
     ]
   ])('given %p event ', async (s: string, expected: Tag, invalid: boolean) => {
     try {

dist/index.js

@@ -321,6 +321,12 @@ function run() {
             }
             core.endGroup();
             context_1.setOutput('labels', labels.join(inputs.sepLabels));
+            // JSON
+            const jsonOutput = meta.getJSON();
+            core.startGroup(`JSON output`);
+            core.info(JSON.stringify(jsonOutput, null, 2));
+            core.endGroup();
+            context_1.setOutput('json', jsonOutput);
             // Bake definition file
             const bakeFile = meta.getBakeFile();
             core.startGroup(`Bake definition file`);
@@ -527,10 +533,14 @@ class Meta {
         return Meta.setVersion(version, vraw, this.flavor.latest == 'auto' ? true : this.flavor.latest == 'true');
     }
     procRefPr(version, tag) {
-        if (!/^refs\/pull\//.test(this.context.ref)) {
+        let ref = this.context.ref;
+        if (/pull_request_target/.test(this.context.eventName)) {
+            ref = `refs/pull/${this.context.payload.number}/merge`;
+        }
+        if (!/^refs\/pull\//.test(ref)) {
             return version;
         }
-        const vraw = this.setValue(this.context.ref.replace(/^refs\/pull\//g, '').replace(/\/merge$/g, ''), tag);
+        const vraw = this.setValue(ref.replace(/^refs\/pull\//g, '').replace(/\/merge$/g, ''), tag);
         return Meta.setVersion(version, vraw, this.flavor.latest == 'auto' ? false : this.flavor.latest == 'true');
     }
     procEdge(version, tag) {
@@ -555,7 +565,11 @@ class Meta {
         if (!this.context.sha) {
             return version;
         }
-        const vraw = this.setValue(this.context.sha.substr(0, 7), tag);
+        let val = this.context.sha;
+        if (tag.attrs['format'] === tcl.ShaFormat.Short) {
+            val = this.context.sha.substr(0, 7);
+        }
+        const vraw = this.setValue(val, tag);
         return Meta.setVersion(version, vraw, this.flavor.latest == 'auto' ? false : this.flavor.latest == 'true');
     }
     static setVersion(version, val, latest) {
@@ -640,21 +654,33 @@ class Meta {
         labels.push(...this.inputs.labels);
         return labels;
     }
+    getJSON() {
+        return {
+            tags: this.getTags(),
+            labels: this.getLabels().reduce((res, label) => {
+                const matches = label.match(/([^=]*)=(.*)/);
+                if (!matches) {
+                    return res;
+                }
+                res[matches[1]] = matches[2];
+                return res;
+            }, {})
+        };
+    }
     getBakeFile() {
-        let jsonLabels = {};
-        for (let label of this.getLabels()) {
-            const matches = label.match(/([^=]*)=(.*)/);
-            if (!matches) {
-                continue;
-            }
-            jsonLabels[matches[1]] = matches[2];
-        }
         const bakeFile = path.join(context_1.tmpDir(), 'docker-metadata-action-bake.json').split(path.sep).join(path.posix.sep);
         fs.writeFileSync(bakeFile, JSON.stringify({
             target: {
                 [this.inputs.bakeTarget]: {
                     tags: this.getTags(),
-                    labels: jsonLabels,
+                    labels: this.getLabels().reduce((res, label) => {
+                        const matches = label.match(/([^=]*)=(.*)/);
+                        if (!matches) {
+                            return res;
+                        }
+                        res[matches[1]] = matches[2];
+                        return res;
+                    }, {}),
                     args: {
                         DOCKER_META_IMAGES: this.inputs.images.join(','),
                         DOCKER_META_VERSION: this.version.main
@@ -698,7 +724,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.Parse = exports.Transform = exports.DefaultPriorities = exports.Tag = exports.RefEvent = exports.Type = void 0;
+exports.Parse = exports.Transform = exports.DefaultPriorities = exports.Tag = exports.ShaFormat = exports.RefEvent = exports.Type = void 0;
 const sync_1 = __importDefault(__webpack_require__(8750));
 const core = __importStar(__webpack_require__(2186));
 var Type;
@@ -717,6 +743,11 @@ var RefEvent;
     RefEvent["Tag"] = "tag";
     RefEvent["PR"] = "pr";
 })(RefEvent = exports.RefEvent || (exports.RefEvent = {}));
+var ShaFormat;
+(function (ShaFormat) {
+    ShaFormat["Short"] = "short";
+    ShaFormat["Long"] = "long";
+})(ShaFormat = exports.ShaFormat || (exports.ShaFormat = {}));
 class Tag {
     constructor() {
         this.attrs = {};
@@ -863,6 +894,14 @@ function Parse(s) {
             if (!tag.attrs.hasOwnProperty('prefix')) {
                 tag.attrs['prefix'] = 'sha-';
             }
+            if (!tag.attrs.hasOwnProperty('format')) {
+                tag.attrs['format'] = ShaFormat.Short;
+            }
+            if (!Object.keys(ShaFormat)
+                .map(k => ShaFormat[k])
+                .includes(tag.attrs['format'])) {
+                throw new Error(`Invalid format for ${s}`);
+            }
             break;
         }
     }

src/main.ts

@@ -60,6 +60,13 @@ async function run() {
     core.endGroup();
     setOutput('labels', labels.join(inputs.sepLabels));
 
+    // JSON
+    const jsonOutput = meta.getJSON();
+    core.startGroup(`JSON output`);
+    core.info(JSON.stringify(jsonOutput, null, 2));
+    core.endGroup();
+    setOutput('json', jsonOutput);
+
     // Bake definition file
     const bakeFile: string = meta.getBakeFile();
     core.startGroup(`Bake definition file`);

src/meta.ts

@@ -191,10 +191,15 @@ export class Meta {
   }
 
   private procRefPr(version: Version, tag: tcl.Tag): Version {
-    if (!/^refs\/pull\//.test(this.context.ref)) {
+    let ref = this.context.ref;
+    if (/pull_request_target/.test(this.context.eventName)) {
+      ref = `refs/pull/${this.context.payload.number}/merge`;
+    }
+    if (!/^refs\/pull\//.test(ref)) {
       return version;
     }
-    const vraw = this.setValue(this.context.ref.replace(/^refs\/pull\//g, '').replace(/\/merge$/g, ''), tag);
+
+    const vraw = this.setValue(ref.replace(/^refs\/pull\//g, '').replace(/\/merge$/g, ''), tag);
     return Meta.setVersion(version, vraw, this.flavor.latest == 'auto' ? false : this.flavor.latest == 'true');
   }
 
@@ -224,7 +229,13 @@ export class Meta {
     if (!this.context.sha) {
       return version;
     }
-    const vraw = this.setValue(this.context.sha.substr(0, 7), tag);
+
+    let val = this.context.sha;
+    if (tag.attrs['format'] === tcl.ShaFormat.Short) {
+      val = this.context.sha.substr(0, 7);
+    }
+
+    const vraw = this.setValue(val, tag);
     return Meta.setVersion(version, vraw, this.flavor.latest == 'auto' ? false : this.flavor.latest == 'true');
   }
 
@@ -312,16 +323,21 @@ export class Meta {
     return labels;
   }
 
-  public getBakeFile(): string {
-    let jsonLabels = {};
-    for (let label of this.getLabels()) {
-      const matches = label.match(/([^=]*)=(.*)/);
-      if (!matches) {
-        continue;
-      }
-      jsonLabels[matches[1]] = matches[2];
-    }
+  public getJSON(): {} {
+    return {
+      tags: this.getTags(),
+      labels: this.getLabels().reduce((res, label) => {
+        const matches = label.match(/([^=]*)=(.*)/);
+        if (!matches) {
+          return res;
+        }
+        res[matches[1]] = matches[2];
+        return res;
+      }, {})
+    };
+  }
 
+  public getBakeFile(): string {
     const bakeFile = path.join(tmpDir(), 'docker-metadata-action-bake.json').split(path.sep).join(path.posix.sep);
     fs.writeFileSync(
       bakeFile,
@@ -330,7 +346,14 @@ export class Meta {
           target: {
             [this.inputs.bakeTarget]: {
               tags: this.getTags(),
-              labels: jsonLabels,
+              labels: this.getLabels().reduce((res, label) => {
+                const matches = label.match(/([^=]*)=(.*)/);
+                if (!matches) {
+                  return res;
+                }
+                res[matches[1]] = matches[2];
+                return res;
+              }, {}),
               args: {
                 DOCKER_META_IMAGES: this.inputs.images.join(','),
                 DOCKER_META_VERSION: this.version.main

src/tag.ts

@@ -17,6 +17,11 @@ export enum RefEvent {
   PR = 'pr'
 }
 
+export enum ShaFormat {
+  Short = 'short',
+  Long = 'long'
+}
+
 export class Tag {
   public type?: Type;
   public attrs: Record<string, string>;
@@ -175,6 +180,16 @@ export function Parse(s: string): Tag {
       if (!tag.attrs.hasOwnProperty('prefix')) {
         tag.attrs['prefix'] = 'sha-';
       }
+      if (!tag.attrs.hasOwnProperty('format')) {
+        tag.attrs['format'] = ShaFormat.Short;
+      }
+      if (
+        !Object.keys(ShaFormat)
+          .map(k => ShaFormat[k])
+          .includes(tag.attrs['format'])
+      ) {
+        throw new Error(`Invalid format for ${s}`);
+      }
       break;
     }
   }