sync: no garbage collection by default

Adds --auto-gc and --no-auto-gc (default) options to control sync's
behavior around calling `git gc`.

Bug: b/184882274
Change-Id: I4d6ca3b233d79566f27e876ab2d79f238ebc12a9
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/344535
Reviewed-by: Xin Li <delphij@google.com>
Tested-by: LaMont Jones <lamontjones@google.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/man/repo-sync.1 b/man/repo-sync.1
index 9cc528dd..f006c03d 100644
--- a/man/repo-sync.1
+++ b/man/repo-sync.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
-.TH REPO "1" "August 2022" "repo sync" "Repo Manual"
+.TH REPO "1" "November 2022" "repo sync" "Repo Manual"
 .SH NAME
 repo \- repo sync - manual page for repo sync
 .SH SYNOPSIS
@@ -106,6 +106,13 @@ delete refs that no longer exist on the remote
 \fB\-\-no\-prune\fR
 do not delete refs that no longer exist on the remote
 .TP
+\fB\-\-auto\-gc\fR
+run garbage collection on all synced projects
+.TP
+\fB\-\-no\-auto\-gc\fR
+do not run garbage collection on any projects
+(default)
+.TP
 \fB\-s\fR, \fB\-\-smart\-sync\fR
 smart sync using manifest from the latest known good
 build
@@ -200,6 +207,9 @@ to a sha1 revision if the sha1 revision does not already exist locally.
 The \fB\-\-prune\fR option can be used to remove any refs that no longer exist on the
 remote.
 .PP
+The \fB\-\-auto\-gc\fR option can be used to trigger garbage collection on all projects.
+By default, repo does not run garbage collection.
+.PP
 SSH Connections
 .PP
 If at least one project remote URL uses an SSH connection (ssh://, git+ssh://,