public-api.yml

name: Cargo-public-api comment

on:
  workflow_run:
    workflows: [Tests]
    types:
      - completed

# taken from https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#using-data-from-the-triggering-workflow
jobs:
  comment:
    runs-on: ubuntu-latest
    steps:
      - name: 'Download artifact'
        id: da
        uses: actions/github-script@v6
        with:
          script: |
            if (context.payload.workflow_run === undefined) {
                core.setFailed("No workflow run found");
            }
            const allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: context.payload.workflow_run.id,
            });
            
            const theArtifact = allArtifacts.data.artifacts.find((artifact) => {
               return artifact.name == "public-api"
            });
            if (theArtifact !== undefined) {
               core.info("Found pr-number artifact id: " + theArtifact.id); 
               let download = await github.rest.actions.downloadArtifact({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  artifact_id: theArtifact.id,
                  archive_format: 'zip',
               });
               let fs = require('fs');
               fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/public_api.zip`, Buffer.from(download.data));
            } else {
               core.setFailed("Artifact public-api was not found");
            }

      - name: 'Unzip artifact'
        run: unzip public_api.zip

      - name: 'Read artifact'
        id: ra
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            let fs = require('fs');
            let issue_number_text = fs.readFileSync('./pr_number', 'uft8');
            core.info("Found pr number \"" + issue_number_text + "\"");
            core.setOutput("pr-number", issue_number_text === "" ? "" : Number(issue_number_text));
            
            let diff = fs.readFileSync('./diff', 'uft8');
            core.setOutput("diff", diff);

      - name: Find Comment
        uses: peter-evans/find-comment@v1
        id: fc
        with:
          issue-number: ${{ steps.ra.outputs.pr-number  }}
          comment-author: "github-actions[bot]"
          body-includes: Removed items from the public API

      - name: Create comment
        if: steps.fc.outputs.comment-id == ''
        uses: peter-evans/create-or-update-comment@v1
        with:
          issue-number: ${{ steps.ra.outputs.pr-number  }}
          body: |
            ${{ steps.ra.outputs.diff }}

      - name: Update comment
        if: steps.fc.outputs.comment-id != ''
        uses: peter-evans/create-or-update-comment@v1
        with:
          comment-id: ${{ steps.fc.outputs.comment-id }}
          body: |
            ${{ steps.ra.outputs.diff }}