Merge 02ade5d400 into 09d2acae67

When checking out a repository with full history, a full clone is done
and then the ref is finally updated to point to the commit that caused
the workflow to be run.  Normally, this is a good protection against
someone pushing to the repository twice in short succession, but it
causes problems with annotated tags.

Specifically, because the entry in refs/tags is set to the commit hash,
if an annotated tag was used, the tag is turned merely into a
lightweight one, which breaks `git describe`.  Every other tag in the
repository will continue to remain a valid annotated tag except the one
for which the workflow was invoked, which is not what the user expected.

Let's work around this by not performing a fetch if what we're fetching
is a tag.  Technically, annotated tags can be anywhere in the hierarchy
at any ref, but this should work as a suitable heuristic for now.

Note that the proper solution would be to expose the revision of the
actual object and check against that instead of the commit, but it
doesn't presently appear that that information is exposed.  Also, we
explicitly do not case-fold since Git refs are case sensitive.

README.md

@@ -10,6 +10,24 @@ The auth token is persisted in the local git config. This enables your scripts t
 
 When Git 2.18 or higher is not in your PATH, falls back to the REST API to download the files.
 
+### Note
+
+Thank you for your interest in this GitHub action, however, right now we are not taking contributions. 
+
+We continue to focus our resources on strategic areas that help our customers be successful while making developers' lives easier. While GitHub Actions remains a key part of this vision, we are allocating resources towards other areas of Actions and are not taking contributions to this repository at this time. The GitHub public roadmap is the best place to follow along for any updates on features we’re working on and what stage they’re in.
+
+We are taking the following steps to better direct requests related to GitHub Actions, including:
+
+1. We will be directing questions and support requests to our [Community Discussions area](https://github.com/orgs/community/discussions/categories/actions)
+
+2. High Priority bugs can be reported through Community Discussions or you can report these to our support team https://support.github.com/contact/bug-report.
+
+3. Security Issues should be handled as per our [security.md](security.md)
+
+We will still provide security updates for this project and fix major breaking changes during this time.
+
+You are welcome to still raise bugs in this repo.
+
 # What's new
 
 Please refer to the [release page](https://github.com/actions/checkout/releases/latest) for the latest release notes.

src/git-source-provider.ts

@@ -179,7 +179,7 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
 
       // When all history is fetched, the ref we're interested in may have moved to a different
       // commit (push or force push). If so, fetch again with a targeted refspec.
-      if (!(await refHelper.testRef(git, settings.ref, settings.commit))) {
+      if (!settings.refs.startsWith("refs/tags") && !(await refHelper.testRef(git, settings.ref, settings.commit))) {
         refSpec = refHelper.getRefSpec(settings.ref, settings.commit)
         await git.fetch(refSpec, fetchOptions)
       }