Add implementation

Author: nilsreichardt

.github/workflows/e2e_test.yml

@@ -0,0 +1,12 @@
+name: e2e-test
+
+on:
+  pull_request:
+
+jobs:
+  e2e-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      # Replace @main with the commit hash of the latest commit on the pull request branch
+      - uses: nilsreichardt/verify-safe-to-test-label@main

action.yml

@@ -0,0 +1,10 @@
+name: 'Remove "safe to test" label'
+description: 'Removes the "safe to test" label if the PR is a fork and the label is present'
+inputs:
+  label:
+    description: 'The name of the lable that should be removed when it is present'
+    required: false
+    default: 'safe to test'
+runs:
+  using: 'node16'
+  main: 'index.js'

index.js

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+const core = require('@actions/core');
+const github = require('@actions/github');
+
+async function run() {
+    try {
+        const context = github.context;
+
+        const allowedEvents = ['pull_request', 'pull_request_target', 'merge_group'];
+        if (allowedEvents.indexOf(context.eventName) === -1) {
+            core.setFailed(`This action only works with the following events: ${allowedEvents.join(', ')}.`);
+            return;
+        }
+
+        const headRepoFullName = context.payload.pull_request.head.repo.full_name;
+        const baseRepoFullName = context.payload.repository.full_name;
+
+        const isFork = headRepoFullName !== baseRepoFullName;
+        if (!isFork) {
+            console.log(`Pull request is not from a fork, skipping.`);
+            return;
+        }
+
+        const safeToTestLabelName = core.getInput('label');
+
+        // Check if pull request has the "safe-to-test" label
+        const labels = context.payload.pull_request.labels;
+        const hasSafeToTestLabel = labels.find(label => label.name === safeToTestLabelName);
+        if (hasSafeToTestLabel) {
+            console.log(`Pull request have the "safe-to-test" label, skipping.`);
+            return;
+        }
+
+        core.setFailed(`Pull request does not have the "safe-to-test" label. Code owners must add the "safe-to-test" label to the pull request before it can be tested.`);
+    } catch (error) {
+        core.setFailed(error.message);
+    }
+}
+
+run();