Initial commit

.github/workflows/pr.yml

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+name: Pull Request
+
+on:
+  pull_request:
+    types: [created]
+
+jobs:
+  auto-approve:
+    name: Label PRs
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v1
+    - name: PR Labeler
+      uses: ./
+      with:
+        token: "${{ secrets.GITHUB_TOKEN }}"
+        fix: 'Fix'
+        feature: 'Feature'
+        pref: 'Performance Improvement'
+        preformance: 'Performance Improvement'

action.yml

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+name: 'PR Labels'
+description: 'Automatically label PRs based on the branch prefix'
+inputs:
+  token:
+    description: 'GitHub Token for the user to perform label additions. Use `secrets.GITHUB_TOKEN` for the actions bot'
+    required: true
+runs:
+  using: 'node12'
+  main: 'index.js'

index.js

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+const core = require('@actions/core'),
+  github = require('@actions/github');
+
+async function run() {
+  try {
+    const token = core.getInput('token');
+    const labels = Object.keys(process.env).filter(e => e !== 'INPUT_TOKEN' && e.startsWith('INPUT_')).map(e => e.replace('INPUT_', '').toLowerCase());
+    console.log(`Checking for labels: ` + labels.join(', '));
+
+    const prNumber = getPrNumber();
+    if (!prNumber) {
+      console.log('Could not get pull request number from context, exiting');
+      return;
+    }
+
+    const client = github.getOctokit(token);
+
+    const repo = github.context.payload.repository;
+
+    const data = await client.pulls.get({
+      owner: repo.owner.login,
+      repo: repo.name,
+      pull_number: prNumber,
+    });
+
+    const branch = data.data.head.ref;
+
+    for (let prefix of labels) {
+      let tmp = prefix;
+      if (!prefix.endsWith('/'))
+        prefix += '/';
+
+      console.log(`If ${branch} startsWith ${prefix}`)
+      if (branch.startsWith(prefix)) {
+        const label = process.env['INPUT_' + tmp.toUpperCase()];
+        console.log(`Adding ${label} to #${prNumber}`);
+        await addLabels(client, prNumber, [label]);
+      }
+    }
+  } catch (error) {
+    console.error(error);
+    core.setFailed(error.message);
+  }
+}
+
+async function addLabels(client, prNumber, labels) {
+  await client.issues.addLabels({
+    owner: github.context.repo.owner,
+    repo: github.context.repo.repo,
+    issue_number: prNumber,
+    labels: labels
+  });
+}
+
+function getPrNumber() {
+  const pullRequest = github.context.payload.pull_request;
+  if (!pullRequest) {
+    return undefined;
+  }
+
+  return pullRequest.number;
+}
+
+run();