Protect publishes with env gate

.github/CODEOWNERS

@@ -1 +1,5 @@
-* @Andarist @emmatown
+/.github/workflows/** @Andarist @emmatown
+/action.yml @Andarist @emmatown
+/scripts/bump.ts @Andarist @emmatown
+/scripts/release.ts @Andarist @emmatown
+/scripts/release-pr.ts @Andarist @emmatown

.github/workflows/publish.yml

@@ -0,0 +1,62 @@
+name: Publish
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+
+permissions: {} # each job should define its own permission explicitly
+
+jobs:
+  version:
+    name: Version
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    outputs:
+      hasChangesets: ${{ steps.changesets.outputs.hasChangesets }}
+    permissions:
+      contents: write # to create release (changesets/action)
+      issues: write # to post issue comments (changesets/action)
+      pull-requests: write # to create pull request (changesets/action)
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: ./.github/actions/ci-setup
+
+      - name: Build
+        run: yarn build
+
+      - name: Create or update release pull request
+        id: changesets
+        uses: ./
+        with:
+          version: yarn bump
+
+  publish:
+    name: Publish
+    if: needs.version.outputs.hasChangesets == 'false'
+    needs: version
+    runs-on: ubuntu-latest
+    environment: marketplace
+    timeout-minutes: 20
+    steps:
+      - uses: actions/create-github-app-token@1b10c78c7865c340bc4f6099eb2f838309f1e8c3 # v3.1.1
+        id: app-token
+        with:
+          client-id: ${{ vars.APP_CLIENT_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          token: ${{ steps.app-token.outputs.token }}
+
+      - uses: ./.github/actions/ci-setup
+
+      - name: Build
+        run: yarn build
+
+      - name: Publish to marketplace
+        uses: ./
+        with:
+          publish: yarn release

.github/workflows/release-pr.yml

@@ -4,17 +4,35 @@ on:
   issue_comment:
     types: [created]
 
+permissions: {}
+
 jobs:
   release_check:
     if: github.repository == 'changesets/action' && github.event.issue.pull_request && startsWith(github.event.comment.body, '/release-pr')
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      issues: write
+      pull-requests: read
     steps:
       - id: report_in_progress
         run: |
           echo "in_progress_reaction_id=$(gh api /repos/${{github.repository}}/issues/comments/${{github.event.comment.id}}/reactions -f content='eyes' --jq '.id')" >> "$GITHUB_OUTPUT"
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+      - id: parse_command
+        run: |
+          if [[ "$COMMENT_BODY" =~ ^/release-pr[[:space:]]+([0-9a-fA-F]{7,40})[[:space:]]*$ ]]
+          then
+            echo "requested_sha=${BASH_REMATCH[1]}" >> "$GITHUB_OUTPUT"
+          else
+            echo "Expected '/release-pr <sha>' where <sha> is a 7-40 character commit SHA."
+            exit 1
+          fi
+        env:
+          COMMENT_BODY: ${{ github.event.comment.body }}
+
       - id: check_authorization
         run: |
           if [[ $AUTHOR_ASSOCIATION == 'MEMBER' || $AUTHOR_ASSOCIATION == 'OWNER' || $AUTHOR_ASSOCIATION == 'COLLABORATOR' ]]
@@ -27,22 +45,80 @@ jobs:
         env:
           AUTHOR_ASSOCIATION: ${{ github.event.comment.author_association }}
 
+      - id: resolve_requested_sha
+        run: |
+          requested_sha=$(echo "$REQUESTED_SHA" | tr '[:upper:]' '[:lower:]')
+
+          mapfile -t matches < <(
+            gh api /repos/${{ github.repository }}/pulls/${{ github.event.issue.number }}/commits --paginate --jq '.[].sha' |
+              awk -v sha="$requested_sha" 'index(tolower($0), sha) == 1 { print $0 }'
+          )
+
+          if [[ ${#matches[@]} -eq 0 ]]
+          then
+            echo "Requested SHA $REQUESTED_SHA is not part of this pull request."
+            exit 1
+          fi
+
+          if [[ ${#matches[@]} -gt 1 ]]
+          then
+            echo "Requested SHA $REQUESTED_SHA is ambiguous for this pull request."
+            exit 1
+          fi
+
+          resolved_sha="${matches[0]}"
+          pr_head_sha=$(gh pr view ${{ github.event.issue.number }} --json headRefOid --jq '.headRefOid')
+
+          if [[ "$resolved_sha" != "$pr_head_sha" ]]
+          then
+            echo "Requested SHA $resolved_sha is not the current PR head $pr_head_sha."
+            exit 1
+          fi
+
+          echo "resolved_sha=$resolved_sha" >> "$GITHUB_OUTPUT"
+          echo "pr_head_sha=$pr_head_sha" >> "$GITHUB_OUTPUT"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REQUESTED_SHA: ${{ steps.parse_command.outputs.requested_sha }}
+
+      - id: get_pr_head_repository
+        run: |
+          echo "head_repository=$(gh pr view ${{ github.event.issue.number }} --json headRepositoryOwner,headRepository --jq '.headRepositoryOwner.login + "/" + .headRepository.name')" >> "$GITHUB_OUTPUT"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
     outputs:
       in_progress_reaction_id: ${{ steps.report_in_progress.outputs.in_progress_reaction_id }}
+      requested_sha: ${{ steps.parse_command.outputs.requested_sha }}
+      resolved_sha: ${{ steps.resolve_requested_sha.outputs.resolved_sha }}
+      pr_head_sha: ${{ steps.resolve_requested_sha.outputs.pr_head_sha }}
+      head_repository: ${{ steps.get_pr_head_repository.outputs.head_repository }}
 
   release:
     if: github.repository == 'changesets/action'
     timeout-minutes: 20
     runs-on: ubuntu-latest
     needs: release_check
+    permissions:
+      contents: write
+      issues: write
+      pull-requests: write
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ./.github/actions/ci-setup
 
-      - name: Checkout pull request
-        run: gh pr checkout ${{ github.event.issue.number }}
+      - name: Fetch validated commit from pull request head repository
+        run: |
+          git remote add pr-head https://github.com/$HEAD_REPOSITORY.git
+          git fetch --no-tags pr-head $RESOLVED_SHA
         env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          HEAD_REPOSITORY: ${{ needs.release_check.outputs.head_repository }}
+          RESOLVED_SHA: ${{ needs.release_check.outputs.resolved_sha }}
+
+      - name: Checkout validated commit
+        run: git checkout --detach $RESOLVED_SHA
+        env:
+          RESOLVED_SHA: ${{ needs.release_check.outputs.resolved_sha }}
 
       - name: Check if Version Packages PR
         id: check_version_packages
@@ -78,7 +154,8 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-      - run: gh pr comment ${{ github.event.issue.number }} --body "The [${{ github.repository }}@$(git rev-parse HEAD)](https://github.com/${{ github.repository }}/commit/$(git rev-parse HEAD)) release triggered by [this comment](${{ github.event.comment.url }}) has [succeeded](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})."
+      - run: |
+          gh pr comment ${{ github.event.issue.number }} --body "The release for \`${{ needs.release_check.outputs.resolved_sha }}\` triggered by [this comment](${{ github.event.comment.url }}) has [succeeded](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}). Published commit: [${{ github.repository }}@$(git rev-parse HEAD)](https://github.com/${{ github.repository }}/commit/$(git rev-parse HEAD))."
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
@@ -87,6 +164,9 @@ jobs:
     timeout-minutes: 2
     runs-on: ubuntu-latest
     if: failure() && github.repository == 'changesets/action' && (needs.release_check.result == 'failure' || needs.release.result == 'failure')
+    permissions:
+      issues: write
+      pull-requests: write
     steps:
       - run: gh api /repos/${{ github.repository }}/issues/comments/${{ github.event.comment.id }}/reactions -f content='-1'
         env:
@@ -96,7 +176,8 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-      - run: gh pr comment ${{ github.event.issue.number }} --body "The release triggered by [this comment](${{ github.event.comment.url }}) has [failed](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})."
+      - run: |
+          gh pr comment ${{ github.event.issue.number }} --body "The release for \`${{ needs.release_check.outputs.requested_sha }}\` triggered by [this comment](${{ github.event.comment.url }}) has [failed](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})."
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GH_REPO: ${{ github.repository }}