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#!/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.
# See git-sh-setup why.
unset CDPATH
usage() {
echo >&2 "* git clone [-l [-s]] [-q] [-u <upload-pack>] [-n] <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 -nsfL $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/\(.*\)'` &&
case "$name" in
*^*) ;;
*)
git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
esac
done <"$clone_tmp/refs"
rm -fr "$clone_tmp"
}
quiet=
use_local=no
local_shared=no
no_checkout=
upload_pack=
while
case "$#,$1" in
0,*) break ;;
*,-n) no_checkout=yes ;;
*,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
*,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
local_shared=yes; use_local=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="$2"
# Try using "humanish" part of source repo if user didn't specify one
[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*/||g')
[ -e "$dir" ] && echo "$dir already exists." && usage
mkdir -p "$dir" &&
D=$(
(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 "$repo" &&
find objects -depth -print | cpio -puamd$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 "$repo/HEAD"
then
HEAD=HEAD
fi
(cd "$repo" && tar cf - refs $HEAD) |
(cd "$D/.git" && tar xf -) || exit 1
;;
*)
case "$repo" in
rsync://*)
rsync $quiet -av --ignore-existing \
--exclude info "$repo/objects/" "$D/.git/objects/" &&
rsync $quiet -av --ignore-existing \
--exclude info "$repo/refs/" "$D/.git/refs/" || exit
# Look at objects/info/alternates for rsync -- http will
# support it natively and git native ones will do it on the
# remote end. Not having that file is not a crime.
rsync -q "$repo/objects/info/alternates" \
"$D/.git/TMP_ALT" 2>/dev/null ||
rm -f "$D/.git/TMP_ALT"
if test -f "$D/.git/TMP_ALT"
then
( cd "$D" &&
. git-parse-remote &&
resolve_alternates "$repo" <"./.git/TMP_ALT" ) |
while read alt
do
case "$alt" in 'bad alternate: '*) die "$alt";; esac
case "$quiet" in
'') echo >&2 "Getting alternate: $alt" ;;
esac
rsync $quiet -av --ignore-existing \
--exclude info "$alt" "$D/.git/objects" || exit
done
rm -f "$D/.git/TMP_ALT"
fi
;;
http://*)
clone_dumb_http "$repo" "$D"
;;
*)
cd "$D" && case "$upload_pack" in
'') git-clone-pack $quiet "$repo" ;;
*) git-clone-pack $quiet "$upload_pack" "$repo" ;;
esac
;;
esac
;;
esac
cd "$D" || exit
if test -f ".git/HEAD"
then
head_points_at=`git-symbolic-ref HEAD`
case "$head_points_at" in
refs/heads/*)
head_points_at=`expr "$head_points_at" : 'refs/heads/\(.*\)'`
mkdir -p .git/remotes &&
echo >.git/remotes/origin \
"URL: $repo
Pull: $head_points_at:origin" &&
cp ".git/refs/heads/$head_points_at" .git/refs/heads/origin &&
find .git/refs/heads -type f -print |
while read ref
do
head=`expr "$ref" : '.git/refs/heads/\(.*\)'` &&
test "$head_points_at" = "$head" ||
test "origin" = "$head" ||
echo "Pull: ${head}:${head}"
done >>.git/remotes/origin
esac
case "$no_checkout" in
'')
git checkout
esac
fi
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