mirror of
https://github.com/coder/coder.git
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david-fraley
106 lines
3.7 KiB
YAML
106 lines
3.7 KiB
YAML
# This workflow posts a docs preview link as a PR comment whenever a
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# pull request that touches files under docs/ is opened. The preview
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# is served by coder.com's branch-preview feature at /docs/@<branch>.
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#
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# The link deep-links to the first added/modified/renamed Markdown file
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# under docs/ so reviewers land on the page that actually changed.
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# Branch names are URL-encoded so that names containing slashes or
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# other special characters produce working links.
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#
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# If the PR only deletes Markdown files (or only changes non-Markdown
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# files such as images or manifest.json), no comment is posted.
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name: docs-preview
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on:
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pull_request:
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types:
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- opened
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paths:
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- "docs/**"
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permissions:
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contents: read
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jobs:
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docs-preview:
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runs-on: ubuntu-latest
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permissions:
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pull-requests: write # needed for commenting on PRs
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steps:
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- name: Post docs preview comment
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env:
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GH_TOKEN: ${{ github.token }}
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BRANCH: ${{ github.event.pull_request.head.ref }}
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PR_NUMBER: ${{ github.event.pull_request.number }}
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REPO: ${{ github.repository }}
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run: |
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# Fetch the list of non-deleted files from the PR. This is
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# intentionally not piped into grep so that a gh-api failure
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# (network, auth, rate-limit) propagates immediately instead
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# of being swallowed by `|| true`.
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all_files=$(gh api --paginate \
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"repos/${REPO}/pulls/${PR_NUMBER}/files" \
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--jq '.[] | select(.status != "removed") | .filename')
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# Pick the first Markdown file under docs/. `|| true` keeps
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# the pipeline from failing when grep finds no matches or
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# head triggers SIGPIPE under `set -o pipefail`.
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first_doc=$(printf '%s\n' "$all_files" \
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| grep -E '^docs/.*\.md$' \
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| head -n 1) || true
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if [ -z "$first_doc" ]; then
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echo "No added/modified Markdown files under docs/, skipping preview comment."
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exit 0
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fi
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# Map the repo path to the docs site URL path.
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# docs/README.md -> "" (docs root)
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# docs/<dir>/index.md -> "<dir>" (directory index)
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# docs/<dir>/README.md -> "<dir>" (directory index)
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# docs/<dir>/<file>.md -> "<dir>/<file>"
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rel="${first_doc#docs/}"
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case "$rel" in
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README.md)
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page_path=""
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;;
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*)
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base="$(basename "$rel")"
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dir="$(dirname "$rel")"
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if [ "$dir" = "." ]; then
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dir=""
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fi
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case "$base" in
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index.md|README.md)
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page_path="$dir"
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;;
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*)
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stripped="${base%.md}"
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if [ -z "$dir" ]; then
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page_path="$stripped"
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else
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page_path="${dir}/${stripped}"
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fi
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;;
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esac
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;;
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esac
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# URL-encode the branch name so slashes and special
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# characters don't break the preview URL. The page path is
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# left as-is because its components are simple ASCII path
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# segments and the slashes between them must be preserved.
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encoded_branch=$(jq -rn --arg b "$BRANCH" '$b | @uri')
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url="https://coder.com/docs/@${encoded_branch}"
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if [ -n "$page_path" ]; then
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url="${url}/${page_path}"
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fi
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gh pr comment "${PR_NUMBER}" \
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--repo "${REPO}" \
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--body "## Docs preview
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[:book: View docs preview](${url}) for \`${first_doc}\`
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<!-- docs-preview -->"
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