chore: add snapshot release workflow (#70)

.github/workflows/snapshot-release.yml

@@ -0,0 +1,156 @@
+name: Snapshot Release
+
+on:
+  issue_comment:
+    types:
+      - created
+
+jobs:
+  release_next:
+    name: release:next
+    runs-on: ubuntu-latest
+    # Permissions necessary for Changesets to push a new branch and open PRs
+    # (for automated Version Packages PRs), and request the JWT for provenance.
+    # More info: https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/about-security-hardening-with-openid-connect#adding-permissions-settings
+    permissions:
+      contents: write
+      pull-requests: write
+      id-token: write
+    if: |
+      github.repository == 'apollographql/graphql-testing-library' &&
+      github.event.issue.pull_request &&
+      (
+        github.event.sender.login == 'alessbell' ||
+        github.event.sender.login == 'bignimbus' ||
+        github.event.sender.login == 'jerelmiller' ||
+        github.event.sender.login == 'phryneas'
+      ) &&
+      startsWith(github.event.comment.body, '/release:pr')
+
+    steps:
+      - uses: alessbell/[email protected]
+        id: comment-branch
+
+      - name: Get sha
+        id: parse-sha
+        continue-on-error: true
+        run: |
+          if [ "${{ steps.comment-branch.outputs.head_owner }}" == "apollographql" ]; then
+            echo "sha=${{ steps.comment-branch.outputs.head_sha }}" >> "${GITHUB_OUTPUT}"
+          else
+            sha_from_comment="$(echo $COMMENT_BODY | tr -s ' ' | cut -d ' ' -f2)"
+
+            if [ $sha_from_comment == "/release:pr" ]; then
+              exit 1
+            else
+              echo "sha=$sha_from_comment" >> "${GITHUB_OUTPUT}"
+            fi
+          fi
+        env:
+          COMMENT_BODY: ${{ github.event.comment.body }}
+
+      - name: Comment sha reminder
+        if: steps.parse-sha.outcome == 'failure'
+        uses: peter-evans/[email protected]
+        with:
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            Did you forget to add the sha? Please use `/release:pr <sha>`
+
+      - name: Fail job
+        if: steps.parse-sha.outcome == 'failure'
+        run: |
+          exit 1
+
+      - name: Checkout ref
+        uses: actions/checkout@v4
+        with:
+          ## specify the owner + repository in order to checkout the fork
+          ## for community PRs
+          repository: ${{ steps.comment-branch.outputs.head_owner }}/${{ steps.comment-branch.outputs.head_repo }}
+          ref: ${{ steps.parse-sha.outputs.sha }}
+          fetch-depth: 0
+
+      - name: Detect new changesets
+        id: added-files
+        run: |
+          delimiter="$(openssl rand -hex 8)"
+          echo "changesets<<${delimiter}" >> "${GITHUB_OUTPUT}"
+          echo "$(git diff --name-only --diff-filter=A ${{ steps.comment-branch.outputs.base_sha }} ${{ steps.parse-sha.outputs.sha }} .changeset/*.md)" >> "${GITHUB_OUTPUT}"
+          echo "${delimiter}" >> "${GITHUB_OUTPUT}"
+
+      - name: Append NPM token to .npmrc
+        run: |
+          cat << EOF > "$HOME/.npmrc"
+            provenance=true
+            //registry.npmjs.org/:_authToken=$NPM_TOKEN
+          EOF
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      - name: Setup Node.js 20.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+
+      - name: Install pnpm and dependencies
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9
+          run_install: true
+
+      - name: Check for pre.json file existence
+        id: check_files
+        uses: andstor/[email protected]
+        with:
+          files: ".changeset/pre.json"
+
+      - name: Exit pre mode if pre.json exists
+        # Changesets prevents us from generating a snapshot release
+        # if we're in prerelease mode, so we remove `pre.json` if it exists
+        # (but do not commit this change since we want the branch to remain
+        # in pre mode)
+        if: steps.check_files.outputs.files_exists == 'true'
+        run: rm .changeset/pre.json
+
+      - name: Add comment if no new changesets exist
+        if: ${{ steps.added-files.outputs.changesets == '' }}
+        uses: peter-evans/[email protected]
+        with:
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            Please add a changeset via `npx changeset` before attempting a snapshot release.
+
+      # https://github.com/atlassian/changesets/blob/master/docs/snapshot-releases.md
+      - name: Release to pr tag
+        if: ${{ steps.added-files.outputs.changesets != '' }}
+        run: |
+          npx changeset version --snapshot pr-${{ github.event.issue.number }} && pnpm i
+          pnpm run clean
+          pnpm run build
+          pnpm run prepdist:changesets
+          cd dist
+          npx changeset publish --no-git-tag --snapshot --tag pr
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      - name: Get released version
+        if: ${{ steps.added-files.outputs.changesets != '' }}
+        id: get-version
+        run: echo "version=$(node -p "require('./dist/package.json').version")" >> "$GITHUB_OUTPUT"
+
+      - name: Deprecate version
+        if: ${{ steps.added-files.outputs.changesets != '' }}
+        run: pnpm deprecate @apollo/graphql-testing-library@${{ steps.get-version.outputs.version }} "This is a snapshot release created to test @apollo/graphql-testing-library. It should not be installed in production environments."
+
+      - name: Create comment
+        if: ${{ steps.added-files.outputs.changesets != '' }}
+        uses: peter-evans/[email protected]
+        with:
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            A new release has been made for this PR. You can install it with:
+
+            ```
+            npm i @apollo/graphql-testing-library@${{ steps.get-version.outputs.version }}