#!/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] [-q] [-u <upload-pack>] <repo> <dir>"
+ exit 1
+}
+
+get_repo_base() {
+ (cd "$1" && (cd .git ; pwd)) 2> /dev/null
+}
+
+quiet=
+use_local=no
+upload_pack=
+while
+ case "$#,$1" in
+ 0,*) break ;;
+ *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
+ *,-q|*,--quiet) quiet=-q ;;
+ 1,-u|*,--upload-pack) usage ;;
+ *,-u|*,--upload-pack)
+ shift
+ upload_pack="--exec=$2" ;;
+ *,-*) usage ;;
+ *) break ;;
+ esac
+do
+ shift
+done
+
+# Turn the source into an absolute path if
+# it is local
repo="$1"
+local=no
+if base=$(get_repo_base "$repo"); then
+ repo="$base"
+ local=yes
+fi
+
dir="$2"
-mkdir $dir || exit 1
-cd $dir
-git-init-db
-git fetch "$repo" && ( git-rev-parse FETCH_HEAD > .git/HEAD )
+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 "$local,$use_local" in
+yes,yes)
+ ( 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 "$D/.git/objects/sample" &&
+ cd "$repo" &&
+ find objects -type f -print |
+ cpio -puamd$l "$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
+
+case "$repo" in
+rsync://*)
+ rsync $quiet -avz --ignore-existing "$repo/objects/" "$D/.git/objects/" &&
+ rsync $quiet -avz --ignore-existing "$repo/refs/" "$D/.git/refs/"
+ ;;
+http://*)
+ echo "Somebody should add http fetch" >&2
+ exit 1
+ ;;
+*)
+ cd "$D" && case "$upload_pack" in
+ '') git-clone-pack $quiet "$repo" ;;
+ *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
+ esac
+ ;;
+esac