Git: show commit amend option on detached HEAD

[Sathvik-Chowdary-Veerapaneni]

Fixes #247936

Problem

When working on a detached HEAD (e.g., git checkout HEAD~1), the commit button dropdown in the Source Control view shows no secondary commands. This means the "Commit (Amend)" option is not available, even though amending commits is a common and valid workflow on detached HEADs.

Root Cause

In actionButton.ts, getCommitActionButtonSecondaryCommands() returns an empty array when HEAD is a tag or has no branch name (detached HEAD). This was likely done to avoid showing post-commit commands like "Push" and "Sync" that don't apply without a tracking branch, but it also incorrectly hid the basic "Commit" and "Commit (Amend)" options.

Fix

Instead of returning an empty array for detached HEAD, the method now returns a command group containing the "Commit" and "Commit (Amend)" commands. Post-commit commands (push/sync from providers) are still excluded since they require a tracking branch.

The fix matches the existing patterns in getCommitActionButtonPrimaryCommand() (which already correctly shows a plain "Commit" command for detached HEAD) and postCommitCommands.ts getCommitCommands() (which already defines both commit and amend commands).

Test Plan

• Checkout a detached HEAD (git checkout HEAD~1)
• Open Source Control view
• Click the dropdown on the commit button
• Verify "Commit" and "Commit (Amend)" options are now shown
• Verify push/sync options are NOT shown (correct, since there's no tracking branch)
• Switch back to a branch and verify all options (commit, amend, push, sync) still appear normally

[vs-code-engineering]

📬 CODENOTIFY

The following users are being notified based on files changed in this PR:

@lszomoru

Matched files:

• extensions/git/src/actionButton.ts

[Sathvik-Chowdary-Veerapaneni]

@microsoft-github-policy-service agree