Initial commit

.github/workflows/fast-forward.yml

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+name: fast-forward
+on:
+  issue_comment:
+    types: [created, edited]
+jobs:
+  fast-forward:
+    # Only run if the comment contains the /fast-forward command.
+    if: ${{ contains(github.event.comment.body, '/fast-forward')
+            && github.event.issue.pull_request }}
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: write
+
+    steps:
+      - name: Fast forwarding
+        uses:  sequoia-pgp/fast-forward@2aaf32801d370b721365d2740b5d4f9cb1715a25
+        with:
+          merge: true
+          # To reduce the workflow's verbosity, use 'on-error'
+          # to only post a comment when an error occurs, or 'never' to
+          # never post a comment.  (In all cases the information is
+          # still available in the step's summary.)
+          comment: always
+

.github/workflows/pull_request.yml

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+name: pull-request
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+jobs:
+  check-fast-forward:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      # We appear to need write permission for both pull-requests and
+      # issues in order to post a comment to a pull request.
+      pull-requests: write
+      issues: write
+
+    steps:
+      - name: Checking if fast forwarding is possible
+        uses:  sequoia-pgp/fast-forward@2aaf32801d370b721365d2740b5d4f9cb1715a25
+        with:
+          merge: false
+          # To reduce the workflow's verbosity, use 'on-error'
+          # to only post a comment when an error occurs, or 'never' to
+          # never post a comment.  (In all cases the information is
+          # still available in the step's summary.)
+          comment: always

README.md

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+```text
+# Commit that we are testing
+GITHUB_REPOSITORY=sequoia-pgp/fast-forward
+GITHUB_HEAD_REF=2aaf32801d370b721365d2740b5d4f9cb1715a25
+# Unit test repository:
+OWNER=sequoia-pgp
+REPO=fast-forward-unit-tests
+DEFAULT_BRANCH=fast-forward-test-014366
+
+GITHUB_ACTOR=nwalfield
+```