gc: Introduce new command to remove old projectsv2.50.1

When projects are removed from manifest, they are only removed from
worktree and not from .repo/projects and .repo/project-objects. Keeping
data under .repo can be desired if user expects deleted projects to be
restored (e.g. checking out a release branch).

Android has ongoing effort to remove many stale projects and this change
allows users to easily free-up their disk space.

Bug: b/344018971
Bug: 40013312
Change-Id: Id23c7524a88082ee6db908f9fd69dcd5d0c4f681
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/445921
Reviewed-by: Mike Frysinger <vapier@google.com>
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>
Reviewed-by: Gavin Mak <gavinmak@google.com>
Tested-by: Josip Sokcevic <sokcevic@chromium.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/man/repo.1 b/man/repo.1
index bda68c39..1c05dcfc 100644
--- a/man/repo.1
+++ b/man/repo.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
-.TH REPO "1" "April 2024" "repo" "Repo Manual"
+.TH REPO "1" "December 2024" "repo" "Repo Manual"
 .SH NAME
 repo \- repository management tool built on top of git
 .SH SYNOPSIS
@@ -79,6 +79,9 @@ Download and checkout a change
 forall
 Run a shell command in each project
 .TP
+gc
+Cleaning up internal repo state.
+.TP
 grep
 Print lines matching a pattern
 .TP