autoassign-prs.yml

name: PR autoassignment

on:
  pull_request_target:
    types: [opened]

jobs:
  assign-new-issue:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - uses: actions/github-script@v7
        with:
          script: |
            // each user has a chance of (p - (previousP ?? 0)) to be assigned
            const potentialAssignees = [
              ["kanej", 1.0]
            ];

            let assignee;
            const r = Math.random();
            console.log("r:", r);
            for (const [username, p] of potentialAssignees) {
              if (r < p) {
                assignee = username;
                break;
              }
            }

            if (assignee === undefined) {
              throw new Error("An assignee should've been set");
            }

            // Within the Github API PRs are issue objects
            const pr = await github.rest.issues.get({
              owner: context.issue.owner,
              repo: context.issue.repo,
              issue_number: context.issue.number
            });

            const isCollaborator = ["OWNER", "MEMBER", "COLLABORATOR"].includes(pr.data.author_association)

            // we only assign PRs from external users
            if (!isCollaborator) {
              await github.rest.issues.addAssignees({
                owner: context.issue.owner,
                repo: context.issue.repo,
                issue_number: context.issue.number,
                assignees: [assignee],
              });
            }