From e95ab1edf38a0747832330cfa66763c25af9ad62 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <junkio@cox.net>
Date: Wed, 6 Jul 2005 13:04:21 -0700
Subject: [PATCH] [PATCH] Short-circuit git-clone-pack while cloning locally
(take 2).
When we are cloning a repository on a local filesystem, it is
faster to just create a hard linkfarm of .git/object hierarchy
and copy the .git/refs files. By default, the script uses the
clone-pack method, but it can be told with the -l flag to do the
hard linkfarm (falling back on recursive file copy) to replicate
the .git/object hierarchy.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
git-clone-script | 68 +++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 67 insertions(+), 1 deletion(-)
diff --git a/git-clone-script b/git-clone-script
index 28a9321269..4f80ade21c 100755
--- a/git-clone-script
+++ b/git-clone-script
@@ -1,4 +1,70 @@
#!/bin/sh
+#
+# Copyright (c) 2005, Linus Torvalds
+# Copyright (c) 2005, Junio C Hamano
+#
+# Clone a repository into a different directory that does not yet exist.
+
+usage() {
+ echo >&2 "* git clone [-l] <repo> <dir>"
+ exit 1
+}
+
+use_local=no
+while
+ case "$#,$1" in
+ 0,*) break ;;
+ *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
+ *,-*) usage ;;
+ *) break ;;
+ esac
+do
+ shift
+done
+
repo="$1"
dir="$2"
-mkdir "$dir" && cd "$dir" && git-init-db && git-clone-pack "$repo"
+mkdir "$dir" &&
+D=$(
+ (cd "$dir" && git-init-db && pwd)
+) &&
+test -d "$D" || usage
+
+# We do local magic only when the user tells us to.
+case "$use_local" in
+yes)
+ ( cd "$repo/objects" ) || {
+ repo="$repo/.git"
+ ( cd "$repo/objects" ) || {
+ echo >&2 "-l flag seen but $repo is not local."
+ exit 1
+ }
+ }
+
+ # See if we can hardlink and drop "l" if not.
+ sample_file=$(cd "$repo" && \
+ find objects -type f -print | sed -e 1q)
+
+ # objects directory should not be empty since we are cloning!
+ test -f "$repo/$sample_file" || exit
+
+ l=
+ if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
+ then
+ l=l
+ fi &&
+ rm -f "$D/.git/objects/sample" &&
+ cp -r$l "$repo/objects" "$D/.git/" || exit 1
+
+ # Make a duplicate of refs and HEAD pointer
+ HEAD=
+ if test -f "$repo/HEAD"
+ then
+ HEAD=HEAD
+ fi
+ tar Ccf "$repo" - refs $HEAD | tar Cxf "$D/.git" - || exit 1
+ exit 0
+ ;;
+esac
+
+cd "$D" && git clone-pack "$repo"
--
2.48.1