self_assign.yml

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# this work for additional information regarding copyright ownership.
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name: Assign or close an issue
on:
  issue_comment:

jobs:
  assign:
    permissions:
      issues: write
    name: Take or close an issue
    if: ${{ !github.event.issue.pull_request }}
    runs-on: ubuntu-latest
    steps:
      - name: Get project milestones
        id: milestones
        uses: actions/github-script@v7
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            const list = await github.rest.issues.listMilestones({
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'open',
              sort: 'due_on',
              direction: 'asc'
            })
            for( const milestone of list.data) {
              if ( milestone.due_on !== null ) { 
                console.log(milestone)
                return milestone.number
                break; 
              }
            }
            return null
      - uses: actions/github-script@v7
        with:
          script: |
            const body = context.payload.comment.body.replace( /\r\n/g, " " ).replace( /\n/g, " " ).split(' ');
            console.log(body);
            for (let i = 0; i < body.length; i++) {
              const bodyString = body[i].toLowerCase();
              if (bodyString == '.take-issue') {
                console.log(`Assigining issue to ${context.payload.comment.user.login}`);
                github.rest.issues.addAssignees({
                  issue_number: context.issue.number,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  assignees: [context.payload.comment.user.login]
                });
                github.rest.issues.removeLabel({
                  issue_number: context.issue.number,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  name: 'awaiting triage'
                });
                github.rest.issues.update({
                  issue_number: context.issue.number,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  milestone: ${{ steps.milestones.outputs.result }}
                });
              } else if (bodyString == '.close-issue') {
                console.log('Closing issue');
                if (i + 1 < body.length && body[i+1].toLowerCase() == 'not_planned') {
                  github.rest.issues.update({
                    issue_number: context.issue.number,
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    state: 'closed',
                    state_reason: 'not_planned'
                  });
                } else {
                  github.rest.issues.update({
                    issue_number: context.issue.number,
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    state: 'closed'
                  });
                }
              } else if (bodyString == '.reopen-issue') {
                  console.log('Reopening issue');
                  github.rest.issues.update({
                    issue_number: context.issue.number,
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    state: 'open'
                  });
              } else if (bodyString == '.set-labels' || bodyString == '.add-labels' || bodyString == '.remove-labels') {
                console.log('Updating labels');
                if (i + 1 >= body.length) {
                  console.log(`Invalid input ${body}`);
                  github.rest.issues.createComment({
                    issue_number: context.issue.number,
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    body: '.<update>-labels command detected, but no labels provided.'
                  });
                  return;
                } else {
                  const labelsInRepo = (await github.paginate(github.rest.issues.listLabelsForRepo, {
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                  })).map(l => l.name);
                  let j = i+1;
                  let partsToConsider = body[j];
                  while ((partsToConsider.match(/'/g) || []).length % 2 == 1) {
                    j++;
                    if (j >= body.length) {
                      console.log(`Invalid input ${body}`);
                      github.rest.issues.createComment({
                        issue_number: context.issue.number,
                        owner: context.repo.owner,
                        repo: context.repo.repo,
                        body: '.<update>-labels command detected with mismatched set of \' quotes'
                      });
                      return;
                    }
                    partsToConsider += ' ' + body[j];
                  }
                  const labelsToActionOn = partsToConsider.split(',').map(l => l.replaceAll('\'', ''));
                  for (label of labelsToActionOn) {
                    if (labelsInRepo.indexOf(label) < 0) {
                      console.log(`Invalid label ${body}`);
                      github.rest.issues.createComment({
                        issue_number: context.issue.number,
                        owner: context.repo.owner,
                        repo: context.repo.repo,
                        body: `Label ${label} cannot be managed because it does not exist in the repo. Please check your spelling.`
                      });
                      return;
                    }
                  }
            
                  if (bodyString == '.set-labels') {
                    console.log(`Setting labels to ${labelsToActionOn}`);
                    github.rest.issues.setLabels({
                      issue_number: context.issue.number,
                      owner: context.repo.owner,
                      repo: context.repo.repo,
                      labels: labelsToActionOn
                    });
                  } else if (bodyString == '.add-labels') {
                    console.log(`Adding labels ${labelsToActionOn}`);
                    github.rest.issues.addLabels({
                      issue_number: context.issue.number,
                      owner: context.repo.owner,
                      repo: context.repo.repo,
                      labels: labelsToActionOn
                    });
                  } else if (bodyString == '.remove-labels') {
                    console.log(`Removing labels ${labelsToActionOn}`);
                    // There's no true removeLabels command, we'll remove them one by one
                    for (const label of labelsToActionOn) {
                      github.rest.issues.removeLabel({
                        issue_number: context.issue.number,
                        owner: context.repo.owner,
                        repo: context.repo.repo,
                        name: label
                      });
                    }
                  }
                }
              }
            }