[PATCH 2/2] Run garbage collection with loose object pruning after svn dcommit

From: Steven Grimm <koreth@midwinter.com>
Date: Oct 5, 2007, 00:15 UTC
Message-ID: <20071005001528.GA13029@midwinter.com>

git-svn dcommit, by virtue of rewriting history to insert svn revision IDs, leaves old commits dangling. Since dcommit is already unsafe to run concurrently with other git commands, no additional risk is introduced by making it prune those old objects as needed.

Signed-off-by: Steven Grimm <koreth@midwinter.com>
---

This is in response to a colleague who complained that, after I installed the latest git release, he was getting lots of "too many unreachable loose objects" errors from the new "git gc --auto" run. Those objects turned out to be dangling commits from a year's worth of git-svn usage, since every git-svn commit will abandon at least one existing commit in order to rewrite it with the svn version data.

 git-svn.perl |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/git-svn.perl b/git-svn.perl
index 777e436..be62ee1 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -441,6 +441,12 @@ sub cmd_dcommit {
 			}
 			command_noisy(@finish, $gs->refname);
 			$last_rev = $cmt_rev;
+
+			# rebase will have made the just-committed revisions
+			# unreachable; over time that can build up lots of
+			# loose objects in the repo. prune is unsafe to run
+			# concurrently but so is dcommit.
+			command_noisy(qw/gc --auto --prune/);
 		}
 	}
 }

-- 
1.5.3.4.203.gcc61a