1#!/bin/sh
2#
3# Copyright (c) 2005, Linus Torvalds
4# Copyright (c) 2005, Junio C Hamano
5#
6# Clone a repository into a different directory that does not yet exist.
7# See git-sh-setup why.
9unset CDPATH
10usage() {
12 echo >&2 "Usage: $0 [-l [-s]] [-q] [-u <upload-pack>] [-n] <repo> [<dir>]"
13 exit 1
14}
15get_repo_base() {
17 (cd "$1" && (cd .git ; pwd)) 2> /dev/null
18}
19if [ -n "$GIT_SSL_NO_VERIFY" ]; then
21 curl_extra_args="-k"
22fi
23http_fetch () {
25 # $1 = Remote, $2 = Local
26 curl -nsfL $curl_extra_args "$1" >"$2"
27}
28clone_dumb_http () {
30 # $1 - remote, $2 - local
31 cd "$2" &&
32 clone_tmp='.git/clone-tmp' &&
33 mkdir -p "$clone_tmp" || exit 1
34 http_fetch "$1/info/refs" "$clone_tmp/refs" &&
35 http_fetch "$1/objects/info/packs" "$clone_tmp/packs" || {
36 echo >&2 "Cannot get remote repository information.
37Perhaps git-update-server-info needs to be run there?"
38 exit 1;
39 }
40 while read type name
41 do
42 case "$type" in
43 P) ;;
44 *) continue ;;
45 esac &&
46 idx=`expr "$name" : '\(.*\)\.pack'`.idx
48 http_fetch "$1/objects/pack/$name" ".git/objects/pack/$name" &&
49 http_fetch "$1/objects/pack/$idx" ".git/objects/pack/$idx" &&
50 git-verify-pack ".git/objects/pack/$idx" || exit 1
51 done <"$clone_tmp/packs"
52 while read sha1 refname
54 do
55 name=`expr "$refname" : 'refs/\(.*\)'` &&
56 case "$name" in
57 *^*) ;;
58 *)
59 git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
60 esac
61 done <"$clone_tmp/refs"
62 rm -fr "$clone_tmp"
63}
64quiet=
66use_local=no
67local_shared=no
68no_checkout=
69upload_pack=
70while
71 case "$#,$1" in
72 0,*) break ;;
73 *,-n) no_checkout=yes ;;
74 *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
75 *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
76 local_shared=yes; use_local=yes ;;
77 *,-q|*,--quiet) quiet=-q ;;
78 1,-u|1,--upload-pack) usage ;;
79 *,-u|*,--upload-pack)
80 shift
81 upload_pack="--exec=$1" ;;
82 *,-*) usage ;;
83 *) break ;;
84 esac
85do
86 shift
87done
88# Turn the source into an absolute path if
90# it is local
91repo="$1"
92local=no
93if base=$(get_repo_base "$repo"); then
94 repo="$base"
95 local=yes
96fi
97dir="$2"
99# Try using "humanish" part of source repo if user didn't specify one
100[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*/||g')
101[ -e "$dir" ] && echo "$dir already exists." && usage
102mkdir -p "$dir" &&
103D=$(
104 (cd "$dir" && git-init-db && pwd)
105) &&
106test -d "$D" || usage
107# We do local magic only when the user tells us to.
109case "$local,$use_local" in
110yes,yes)
111 ( cd "$repo/objects" ) || {
112 echo >&2 "-l flag seen but $repo is not local."
113 exit 1
114 }
115 case "$local_shared" in
117 no)
118 # See if we can hardlink and drop "l" if not.
119 sample_file=$(cd "$repo" && \
120 find objects -type f -print | sed -e 1q)
121 # objects directory should not be empty since we are cloning!
123 test -f "$repo/$sample_file" || exit
124 l=
126 if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
127 then
128 l=l
129 fi &&
130 rm -f "$D/.git/objects/sample" &&
131 cd "$repo" &&
132 find objects -depth -print | cpio -puamd$l "$D/.git/" || exit 1
133 ;;
134 yes)
135 mkdir -p "$D/.git/objects/info"
136 {
137 test -f "$repo/objects/info/alternates" &&
138 cat "$repo/objects/info/alternates";
139 echo "$repo/objects"
140 } >"$D/.git/objects/info/alternates"
141 ;;
142 esac
143 # Make a duplicate of refs and HEAD pointer
145 HEAD=
146 if test -f "$repo/HEAD"
147 then
148 HEAD=HEAD
149 fi
150 (cd "$repo" && tar cf - refs $HEAD) |
151 (cd "$D/.git" && tar xf -) || exit 1
152 ;;
153*)
154 case "$repo" in
155 rsync://*)
156 rsync $quiet -av --ignore-existing \
157 --exclude info "$repo/objects/" "$D/.git/objects/" &&
158 rsync $quiet -av --ignore-existing \
159 --exclude info "$repo/refs/" "$D/.git/refs/" || exit
160 # Look at objects/info/alternates for rsync -- http will
162 # support it natively and git native ones will do it on the
163 # remote end. Not having that file is not a crime.
164 rsync -q "$repo/objects/info/alternates" \
165 "$D/.git/TMP_ALT" 2>/dev/null ||
166 rm -f "$D/.git/TMP_ALT"
167 if test -f "$D/.git/TMP_ALT"
168 then
169 ( cd "$D" &&
170 . git-parse-remote &&
171 resolve_alternates "$repo" <"./.git/TMP_ALT" ) |
172 while read alt
173 do
174 case "$alt" in 'bad alternate: '*) die "$alt";; esac
175 case "$quiet" in
176 '') echo >&2 "Getting alternate: $alt" ;;
177 esac
178 rsync $quiet -av --ignore-existing \
179 --exclude info "$alt" "$D/.git/objects" || exit
180 done
181 rm -f "$D/.git/TMP_ALT"
182 fi
183 ;;
184 http://*)
185 clone_dumb_http "$repo" "$D"
186 ;;
187 *)
188 cd "$D" && case "$upload_pack" in
189 '') git-clone-pack $quiet "$repo" ;;
190 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
191 esac || {
192 echo >&2 "clone-pack from '$repo' failed."
193 exit 1
194 }
195 ;;
196 esac
197 ;;
198esac
199cd "$D" || exit
201if test -f ".git/HEAD"
203then
204 head_points_at=`git-symbolic-ref HEAD`
205 case "$head_points_at" in
206 refs/heads/*)
207 head_points_at=`expr "$head_points_at" : 'refs/heads/\(.*\)'`
208 mkdir -p .git/remotes &&
209 echo >.git/remotes/origin \
210 "URL: $repo
211Pull: $head_points_at:origin" &&
212 cp ".git/refs/heads/$head_points_at" .git/refs/heads/origin &&
213 find .git/refs/heads -type f -print |
214 while read ref
215 do
216 head=`expr "$ref" : '.git/refs/heads/\(.*\)'` &&
217 test "$head_points_at" = "$head" ||
218 test "origin" = "$head" ||
219 echo "Pull: ${head}:${head}"
220 done >>.git/remotes/origin
221 esac
222 case "$no_checkout" in
224 '')
225 git checkout
226 esac
227fi