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-rwxr-xr-xgit-clone.sh165
1 files changed, 165 insertions, 0 deletions
diff --git a/git-clone.sh b/git-clone.sh
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index 0000000..c076292
--- /dev/null
+++ b/git-clone.sh
@@ -0,0 +1,165 @@
+#!/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 [-s]] [-q] [-u <upload-pack>] <repo> <dir>"
+ exit 1
+}
+
+get_repo_base() {
+ (cd "$1" && (cd .git ; pwd)) 2> /dev/null
+}
+
+if [ -n "$GIT_SSL_NO_VERIFY" ]; then
+ curl_extra_args="-k"
+fi
+
+http_fetch () {
+ # $1 = Remote, $2 = Local
+ curl -nsf $curl_extra_args "$1" >"$2"
+}
+
+clone_dumb_http () {
+ # $1 - remote, $2 - local
+ cd "$2" &&
+ clone_tmp='.git/clone-tmp' &&
+ mkdir -p "$clone_tmp" || exit 1
+ http_fetch "$1/info/refs" "$clone_tmp/refs" &&
+ http_fetch "$1/objects/info/packs" "$clone_tmp/packs" || {
+ echo >&2 "Cannot get remote repository information.
+Perhaps git-update-server-info needs to be run there?"
+ exit 1;
+ }
+ while read type name
+ do
+ case "$type" in
+ P) ;;
+ *) continue ;;
+ esac &&
+
+ idx=`expr "$name" : '\(.*\)\.pack'`.idx
+ http_fetch "$1/objects/pack/$name" ".git/objects/pack/$name" &&
+ http_fetch "$1/objects/pack/$idx" ".git/objects/pack/$idx" &&
+ git-verify-pack ".git/objects/pack/$idx" || exit 1
+ done <"$clone_tmp/packs"
+
+ while read sha1 refname
+ do
+ name=`expr "$refname" : 'refs/\(.*\)'` &&
+ git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
+ done <"$clone_tmp/refs"
+ rm -fr "$clone_tmp"
+}
+
+quiet=
+use_local=no
+local_shared=no
+upload_pack=
+while
+ case "$#,$1" in
+ 0,*) break ;;
+ *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
+ *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
+ local_shared=yes ;;
+ *,-q|*,--quiet) quiet=-q ;;
+ 1,-u|1,--upload-pack) usage ;;
+ *,-u|*,--upload-pack)
+ shift
+ upload_pack="--exec=$1" ;;
+ *,-*) 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" &&
+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 $repo is not local."
+ exit 1
+ }
+
+ case "$local_shared" in
+ no)
+ # 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 "$D/.git/" || exit 1
+ ;;
+ yes)
+ mkdir -p "$D/.git/objects/info"
+ {
+ test -f "$repo/objects/info/alternates" &&
+ cat "$repo/objects/info/alternates";
+ echo "$repo/objects"
+ } >"$D/.git/objects/info/alternates"
+ ;;
+ esac
+
+ # 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
+ ;;
+*)
+ case "$repo" in
+ rsync://*)
+ rsync $quiet -avz --ignore-existing "$repo/objects/" "$D/.git/objects/" &&
+ rsync $quiet -avz --ignore-existing "$repo/refs/" "$D/.git/refs/"
+ ;;
+ http://*)
+ clone_dumb_http "$repo" "$D"
+ ;;
+ *)
+ cd "$D" && case "$upload_pack" in
+ '') git-clone-pack $quiet "$repo" ;;
+ *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
+ esac
+ ;;
+ esac
+ ;;
+esac
+
+# Update origin.
+mkdir -p "$D/.git/remotes/" &&
+rm -f "$D/.git/remotes/origin" &&
+echo >"$D/.git/remotes/origin" \
+"URL: $repo
+Pull: master:origin"