Convert checkout to a regular action (#70)

src/main.ts

@@ -0,0 +1,47 @@
+import * as core from '@actions/core'
+import * as coreCommand from '@actions/core/lib/command'
+import * as gitSourceProvider from './git-source-provider'
+import * as inputHelper from './input-helper'
+import * as path from 'path'
+
+const cleanupRepositoryPath = process.env['STATE_repositoryPath'] as string
+
+async function run(): Promise<void> {
+  try {
+    const sourceSettings = inputHelper.getInputs()
+
+    try {
+      // Register problem matcher
+      coreCommand.issueCommand(
+        'add-matcher',
+        {},
+        path.join(__dirname, 'problem-matcher.json')
+      )
+
+      // Get sources
+      await gitSourceProvider.getSource(sourceSettings)
+    } finally {
+      // Unregister problem matcher
+      coreCommand.issueCommand('remove-matcher', {owner: 'checkout-git'}, '')
+    }
+  } catch (error) {
+    core.setFailed(error.message)
+  }
+}
+
+async function cleanup(): Promise<void> {
+  try {
+    await gitSourceProvider.cleanup(cleanupRepositoryPath)
+  } catch (error) {
+    core.warning(error.message)
+  }
+}
+
+// Main
+if (!cleanupRepositoryPath) {
+  run()
+}
+// Post
+else {
+  cleanup()
+}