Test for broken links in Markdown files #10
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| # @file markdown-link-tester.yml | |
| # @brief GitHub Actions workflow to check the README file for broken links | |
| # @author Mike Hucka <mhucka@caltech.edu> | |
| # @license Please see the file named LICENSE in the repository | |
| # @repo https://github.com/caltechlibrary/iga | |
| # | |
| # This workflow checks the URL destinations of in links found inside .md | |
| # files in the repository where this workflow is installed. If any URLs | |
| # are invalid, this opens an issue in the repository, with the issue | |
| # body containing a list of files and URLs that have errors in them. | |
| # Only URLs using the scheme https or http are tested. | |
| # | |
| # It is not advisable to run this workflow on every push, because during | |
| # intense sessions of writing and testing, it often results in opening | |
| # multiple issues for the same file(s) and URLs before one realizes what's | |
| # happened. Instead, this workflow is configured to run: | |
| # - once a day | |
| # - when pull requests are made on files ending in .md | |
| # - when this workflow file itself is edited (markdown-link-tester.yml) | |
| # It can also be invoked manually when needed from the GitHub Actions tab. | |
| # | |
| # This workflow includes a configuration variable for listing URLs that | |
| # should be ignored when encountered. This is useful when some of your files | |
| # contain fake URLs used as examples in documentation. The URLs must be | |
| # listed one per line. They can be written as regular expresions; e.g., | |
| # https://example\.(com|org) | |
| # | |
| # This workflow assigns a label to the GitHub issue it creates. The default | |
| # label is "bug"; this can be adjusted by setting the value in the "env" | |
| # section below. | |
| # ╭────────────────────────────────────────────────────────────────╮ | |
| # │ Set the following variables to suit your repository and needs. │ | |
| # ╰────────────────────────────────────────────────────────────────╯ | |
| env: | |
| # Markdown files examined by the workflow. Can be a comma-separated list. | |
| files: '*.md' | |
| # File containing a list of URLs to ignore, one per line. | |
| # Path is relative to the root of the repository. | |
| ignore_list: '.github/workflows/ignored-urls.txt' | |
| # Label assigned to issues created by this workflow. | |
| labels: 'bug' | |
| # ╭────────────────────────────────────────────────────────────────╮ | |
| # │ The rest of this file should not need modification. │ | |
| # ╰────────────────────────────────────────────────────────────────╯ | |
| # Implementation notes: | |
| # - This purposefully doesn't use lychee's caching facility, because turning | |
| # on that feature results in lychee not reporting the original error | |
| # when a cached URL is encountered. This is very unhelpful in this context. | |
| # | |
| # - More information about optional settings for the lychee-action GHA can | |
| # be found at https://github.com/lycheeverse/lychee-action | |
| name: Test links in Markdown files | |
| run-name: Test for broken links in Markdown files | |
| on: | |
| schedule: | |
| - cron: "00 11 * * *" | |
| pull_request: | |
| paths: | |
| - '**.md' | |
| push: | |
| paths: | |
| - .github/workflows/markdown-link-tester.yml | |
| workflow_dispatch: | |
| jobs: | |
| check-files-changed: | |
| name: Check if files changed | |
| runs-on: ubuntu-latest | |
| outputs: | |
| changed: ${{steps.test-files-changed.outputs.changed}} | |
| steps: | |
| - name: Check out source repository | |
| uses: actions/checkout@v3 | |
| with: | |
| fetch-depth: 10 | |
| - name: Check if the files were changed in latest commit | |
| uses: MarceloPrado/has-changed-path@v1.0.1 | |
| id: test-files-changed | |
| with: | |
| paths: ${{env.files}} | |
| - name: Report whether files needed to be tested | |
| if: steps.test-files-changed.outputs.changed != 'true' && github.event_name != 'workflow_dispatch' | |
| run: | | |
| echo "Link testing **skipped** because the latest commit did not change the relevant files." >> $GITHUB_STEP_SUMMARY | |
| echo "The files tested were the following: <code>${{env.files}}</code>" >> $GITHUB_STEP_SUMMARY | |
| test-links: | |
| name: Check links in Markdown files | |
| if: needs.check-files-changed.outputs.changed == 'true' || github.event_name == 'workflow_dispatch' | |
| runs-on: ubuntu-latest | |
| needs: check-files-changed | |
| steps: | |
| - name: Check out source repository | |
| uses: actions/checkout@v3 | |
| - name: Configure link checker | |
| run: | | |
| if [ -e ${{env.ignore_list}} ]; then | |
| cp -f ${{env.ignore_list}} .lycheeignore | |
| fi | |
| - name: Test URLs found inside Markdown files | |
| uses: lycheeverse/lychee-action@v1.8.0 | |
| with: | |
| args: --no-progress --scheme https --scheme http --exclude-mail --exclude-loopback --include-verbatim ${{env.files}} | |
| debug: false | |
| format: markdown | |
| jobSummary: false | |
| - name: Post-process the output | |
| if: env.lychee_exit_code != 0 | |
| # Edit lychee's output to remove needless bits and improve formatting. | |
| run: | | |
| sed -e 's/^## Summary//' \ | |
| -e 's/^|.*//g' \ | |
| -e 's/^## Errors per input//' \ | |
| -e 's/{.*$//g' \ | |
| -e 's/| Failed:/– Failed:/g' \ | |
| -e 's/| Timeout:/– Timeout:/g' \ | |
| -e 's/^\[Full Github Actions output\(.*\)/\nThis content was produced by a [Github Action\1./' \ | |
| -e 's/\(.*\)\[\(.*\)\]\(.*\)/\1[`\2`]\3/' \ | |
| < lychee/out.md > lychee/report.md | |
| - name: Open a new issue/ticket to report the problems | |
| if: env.lychee_exit_code != 0 | |
| id: create-issue | |
| uses: peter-evans/create-issue-from-file@v4 | |
| with: | |
| token: ${{secrets.GITHUB_TOKEN}} | |
| title: Invalid URLs in Markdown files | |
| content-filepath: ./lychee/report.md | |
| labels: ${{env.labels}} | |
| - name: Put a link to the issue in the workflow output | |
| if: env.lychee_exit_code != 0 | |
| env: | |
| issue-number: ${{steps.create-issue.outputs.issue-number}} | |
| run: | | |
| echo "## Invalid URLs found" >> $GITHUB_STEP_SUMMARY | |
| echo "" >> $GITHUB_STEP_SUMMARY | |
| echo "Ticket [#${{env.issue-number}}](https://github.com/${{github.repository}}/issues/${{env.issue-number}}) has been created." >> $GITHUB_STEP_SUMMARY |