git-core-foo -> git-foo, except the core package
[git] / git-clone.sh
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
8 # See git-sh-setup why.
9 unset CDPATH
10
11 usage() {
12         echo >&2 "* git clone [-l [-s]] [-q] [-u <upload-pack>] [-n] <repo> [<dir>]"
13         exit 1
14 }
15
16 get_repo_base() {
17         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
18 }
19
20 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
21     curl_extra_args="-k"
22 fi
23
24 http_fetch () {
25         # $1 = Remote, $2 = Local
26         curl -nsfL $curl_extra_args "$1" >"$2"
27 }
28
29 clone_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.
37 Perhaps git-update-server-info needs to be run there?"
38                 exit 1;
39         }
40         while read type name
41         do
42                 case "$type" in
43                 P) ;;
44                 *) continue ;;
45                 esac &&
46
47                 idx=`expr "$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 <"$clone_tmp/packs"
52
53         while read sha1 refname
54         do
55                 name=`expr "$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 "$clone_tmp"
63 }
64
65 quiet=
66 use_local=no
67 local_shared=no
68 no_checkout=
69 upload_pack=
70 while
71         case "$#,$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 ;;
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
85 do
86         shift
87 done
88
89 # Turn the source into an absolute path if
90 # it is local
91 repo="$1"
92 local=no
93 if base=$(get_repo_base "$repo"); then
94         repo="$base"
95         local=yes
96 fi
97
98 dir="$2"
99 # Try using "humanish" part of source repo if user didn't specify one
100 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*/||g')
101 [ -e "$dir" ] && echo "$dir already exists." && usage
102 mkdir -p "$dir" &&
103 D=$(
104         (cd "$dir" && git-init-db && pwd)
105 ) &&
106 test -d "$D" || usage
107
108 # We do local magic only when the user tells us to.
109 case "$local,$use_local" in
110 yes,yes)
111         ( cd "$repo/objects" ) || {
112                 echo >&2 "-l flag seen but $repo is not local."
113                 exit 1
114         }
115
116         case "$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
122             # objects directory should not be empty since we are cloning!
123             test -f "$repo/$sample_file" || exit
124
125             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
144         # 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/" "$D/.git/refs/" || exit
160
161                 # Look at objects/info/alternates for rsync -- http will
162                 # support it natively and git native ones will do it on the
163                 # remote end.  Not having that file is not a crime.
164                 rsync -q "$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" "$repo" ;;
191                 esac
192                 ;;
193         esac
194         ;;
195 esac
196
197 cd "$D" || exit
198
199 if test -f ".git/HEAD"
200 then
201         head_points_at=`git-symbolic-ref HEAD`
202         case "$head_points_at" in
203         refs/heads/*)
204                 head_points_at=`expr "$head_points_at" : 'refs/heads/\(.*\)'`
205                 mkdir -p .git/remotes &&
206                 echo >.git/remotes/origin \
207                 "URL: $repo
208 Pull: $head_points_at:origin" &&
209                 cp ".git/refs/heads/$head_points_at" .git/refs/heads/origin &&
210                 find .git/refs/heads -type f -print |
211                 while read ref
212                 do
213                         head=`expr "$ref" : '.git/refs/heads/\(.*\)'` &&
214                         test "$head_points_at" = "$head" ||
215                         test "origin" = "$head" ||
216                         echo "Pull: ${head}:${head}"
217                 done >>.git/remotes/origin
218         esac
219
220         case "$no_checkout" in
221         '')
222                 git checkout
223         esac
224 fi