Initial commit

Co-Authored-By: Eric Tuvesson <eric.tuvesson@gmail.com>
Co-Authored-By: mikaeltellhed <2311083+mikaeltellhed@users.noreply.github.com>
Co-Authored-By: kotte <14197736+mrtamagotchi@users.noreply.github.com>
Co-Authored-By: Anders Larsson <64838990+anders-topp@users.noreply.github.com>
Co-Authored-By: Johan  <4934465+joolsus@users.noreply.github.com>
Co-Authored-By: Tore Knudsen <18231882+torekndsn@users.noreply.github.com>
Co-Authored-By: victoratndl <99176179+victoratndl@users.noreply.github.com>

packages/noodl-git/src/core/show-ref.ts

@@ -0,0 +1,52 @@
+import { git } from './client';
+
+export async function getRefHeads(repositoryDir: string): Promise<Map<string, string>> {
+  const args = ['show-ref', '--heads', '-d'];
+
+  const tags = await git(args, repositoryDir, 'getRefHeads', {
+    successExitCodes: new Set([0, 1]) // when there are no tags, git exits with 1.
+  });
+
+  const tagsArray: Array<[string, string]> = tags.output
+    .toString()
+    .split('\n')
+    .filter((line) => line !== '')
+    .map((line) => {
+      const [commitSha, rawTagName] = line.split(' ');
+
+      // Normalize tag names by removing the leading ref/tags/ and the trailing ^{}.
+      //
+      // git show-ref returns two entries for annotated tags:
+      // deadbeef refs/tags/annotated-tag
+      // de510b99 refs/tags/annotated-tag^{}
+      //
+      // The first entry sha correspond to the blob object of the annotation, while the second
+      // entry corresponds to the actual commit where the tag was created.
+      // By normalizing the tag name we can make sure that the commit sha gets stored in the returned
+      // Map of commits (since git will always print the entry with the commit sha at the end).
+      const headName = rawTagName.replace(/^refs\/heads\//, '').replace(/\^\{\}$/, '');
+
+      return [headName, commitSha];
+    });
+
+  return new Map(tagsArray);
+}
+
+export async function getAllTags(repositoryDir: string): Promise<Map<string, string>> {
+  const args = ['show-ref', '-d'];
+
+  const tags = await git(args, repositoryDir, 'getAllTags', {
+    successExitCodes: new Set([0, 1]) // when there are no tags, git exits with 1.
+  });
+
+  const tagsArray: Array<[string, string]> = tags.output
+    .toString()
+    .split('\n')
+    .filter((line) => line !== '')
+    .map((line) => {
+      const [commitSha, rawTagName] = line.split(' ');
+      return [rawTagName, commitSha];
+    });
+
+  return new Map(tagsArray);
+}