[PATCH] Short-circuit git-clone-pack while cloning locally.
>>>>> "LT" == Linus Torvalds <torvalds@osdl.org> writes:
LT> Anyway, as mentioned, you can certainly do a local clone a lot faster with LT> "cp -rl" (and yes, I'll apply Junio's patch if he makes it available LT> against the new version, and adds a flag to make it conditional),...
By invitation.
------------ 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 with -l and -c parameters it can be told to do the hard linkfarm and recursive file copy to replicate .git/object hierarchy.
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
git-clone-script | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 79 insertions(+), 1 deletions(-)
1eb81b1791a751ca0fd1c3e7c1d4a4baacdd042a
diff --git a/git-clone-script b/git-clone-script
--- a/git-clone-script
+++ b/git-clone-script
@@ -1,4 +1,81 @@
#!/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|-c|-p] <repo> <dir>"
+ exit 1
+}
+
+# what to do when running locally
+local_use=default
+while
+ case "$#,$1" in
+ 0,*) break ;;
+ *,-l) local_use=link ;;
+ *,-c) local_use=copy ;;
+ *,-p) local_use=pack ;;
+ *,-*) 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 "$dir" && git-init-db && pwd)
+) || exit 1
+
+# See if repo is a local directory.
+is_local=f
+if (
+ cd "$repo/objects" 2>/dev/null
+)
+then
+ is_local=t
+fi
+
+case "$local_use,$is_local" in
+default,f)
+ ;;
+*,f) echo >&2 "-l|-c|-p flag can be used only when cloning a local repo"
+ exit 1
+ ;;
+copy,t | link,t)
+ l=
+ case "$local_use" in
+ link)
+ # See if we can hardlink and drop "l" if not.
+ sample_file=$(cd "$repo" && \
+ find objects -type f -print | sed -e 1q)
+
+ # objects directory should not be empty since we are cloning!
+ test -f "$repo/$sample_file" || exit
+
+ if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
+ then
+ l=l
+ fi &&
+ rm -f "$D/.git/objects/sample"
+ ;;
+ esac &&
+ cp -r$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
+ ;;
+*)
+ cd "$D" && git clone-pack "$repo"
+ ;;
+esac
