Merge branch 'maint'
[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 die() {
12         echo >&2 "$@"
13         exit 1
14 }
15
16 usage() {
17         die "Usage: $0 [--template=<template_directory>] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [--depth <n>] [-n] <repo> [<dir>]"
18 }
19
20 get_repo_base() {
21         (
22                 cd "`/bin/pwd`" &&
23                 cd "$1" || cd "$1.git" &&
24                 {
25                         cd .git
26                         pwd
27                 }
28         ) 2>/dev/null
29 }
30
31 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
32     curl_extra_args="-k"
33 fi
34
35 http_fetch () {
36         # $1 = Remote, $2 = Local
37         curl -nsfL $curl_extra_args "$1" >"$2"
38 }
39
40 clone_dumb_http () {
41         # $1 - remote, $2 - local
42         cd "$2" &&
43         clone_tmp="$GIT_DIR/clone-tmp" &&
44         mkdir -p "$clone_tmp" || exit 1
45         if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
46                 "`git-config --bool http.noEPSV`" = true ]; then
47                 curl_extra_args="${curl_extra_args} --disable-epsv"
48         fi
49         http_fetch "$1/info/refs" "$clone_tmp/refs" ||
50                 die "Cannot get remote repository information.
51 Perhaps git-update-server-info needs to be run there?"
52         test "z$quiet" = z && v=-v || v=
53         while read sha1 refname
54         do
55                 name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
56                 case "$name" in
57                 *^*)    continue;;
58                 esac
59                 case "$bare,$name" in
60                 yes,* | ,heads/* | ,tags/*) ;;
61                 *)      continue ;;
62                 esac
63                 if test -n "$use_separate_remote" &&
64                    branch_name=`expr "z$name" : 'zheads/\(.*\)'`
65                 then
66                         tname="remotes/$origin/$branch_name"
67                 else
68                         tname=$name
69                 fi
70                 git-http-fetch $v -a -w "$tname" "$sha1" "$1" || exit 1
71         done <"$clone_tmp/refs"
72         rm -fr "$clone_tmp"
73         http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
74         rm -f "$GIT_DIR/REMOTE_HEAD"
75 }
76
77 quiet=
78 local=no
79 use_local=no
80 local_shared=no
81 unset template
82 no_checkout=
83 upload_pack=
84 bare=
85 reference=
86 origin=
87 origin_override=
88 use_separate_remote=t
89 depth=
90 no_progress=
91 test -t 1 || no_progress=--no-progress
92 while
93         case "$#,$1" in
94         0,*) break ;;
95         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
96         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
97           no_checkout=yes ;;
98         *,--na|*,--nak|*,--nake|*,--naked|\
99         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
100         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
101         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
102           local_shared=yes; use_local=yes ;;
103         1,--template) usage ;;
104         *,--template)
105                 shift; template="--template=$1" ;;
106         *,--template=*)
107           template="$1" ;;
108         *,-q|*,--quiet) quiet=-q ;;
109         *,--use-separate-remote) ;;
110         *,--no-separate-remote)
111                 die "clones are always made with separate-remote layout" ;;
112         1,--reference) usage ;;
113         *,--reference)
114                 shift; reference="$1" ;;
115         *,--reference=*)
116                 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
117         *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
118                 case "$2" in
119                 '')
120                     usage ;;
121                 */*)
122                     die "'$2' is not suitable for an origin name"
123                 esac
124                 git-check-ref-format "heads/$2" ||
125                     die "'$2' is not suitable for a branch name"
126                 test -z "$origin_override" ||
127                     die "Do not give more than one --origin options."
128                 origin_override=yes
129                 origin="$2"; shift
130                 ;;
131         1,-u|1,--upload-pack) usage ;;
132         *,-u|*,--upload-pack)
133                 shift
134                 upload_pack="--upload-pack=$1" ;;
135         *,--upload-pack=*)
136                 upload_pack=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
137         1,--depth) usage;;
138         *,--depth)
139                 shift
140                 depth="--depth=$1";;
141         *,-*) usage ;;
142         *) break ;;
143         esac
144 do
145         shift
146 done
147
148 repo="$1"
149 test -n "$repo" ||
150     die 'you must specify a repository to clone.'
151
152 # --bare implies --no-checkout and --no-separate-remote
153 if test yes = "$bare"
154 then
155         if test yes = "$origin_override"
156         then
157                 die '--bare and --origin $origin options are incompatible.'
158         fi
159         no_checkout=yes
160         use_separate_remote=
161 fi
162
163 if test -z "$origin"
164 then
165         origin=origin
166 fi
167
168 # Turn the source into an absolute path if
169 # it is local
170 if base=$(get_repo_base "$repo"); then
171         repo="$base"
172         local=yes
173 fi
174
175 dir="$2"
176 # Try using "humanish" part of source repo if user didn't specify one
177 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
178 [ -e "$dir" ] && die "destination directory '$dir' already exists."
179 mkdir -p "$dir" &&
180 D=$(cd "$dir" && pwd) &&
181 trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
182 case "$bare" in
183 yes)
184         GIT_DIR="$D" ;;
185 *)
186         GIT_DIR="$D/.git" ;;
187 esac && export GIT_DIR && git-init ${template+"$template"} || usage
188
189 if test -n "$reference"
190 then
191         ref_git=
192         if test -d "$reference"
193         then
194                 if test -d "$reference/.git/objects"
195                 then
196                         ref_git="$reference/.git"
197                 elif test -d "$reference/objects"
198                 then
199                         ref_git="$reference"
200                 fi
201         fi
202         if test -n "$ref_git"
203         then
204                 ref_git=$(cd "$ref_git" && pwd)
205                 echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
206                 (
207                         GIT_DIR="$ref_git" git for-each-ref \
208                                 --format='%(objectname) %(*objectname)'
209                 ) |
210                 while read a b
211                 do
212                         test -z "$a" ||
213                         git update-ref "refs/reference-tmp/$a" "$a"
214                         test -z "$b" ||
215                         git update-ref "refs/reference-tmp/$b" "$b"
216                 done
217         else
218                 die "reference repository '$reference' is not a local directory."
219         fi
220 fi
221
222 rm -f "$GIT_DIR/CLONE_HEAD"
223
224 # We do local magic only when the user tells us to.
225 case "$local,$use_local" in
226 yes,yes)
227         ( cd "$repo/objects" ) ||
228                 die "-l flag seen but repository '$repo' is not local."
229
230         case "$local_shared" in
231         no)
232             # See if we can hardlink and drop "l" if not.
233             sample_file=$(cd "$repo" && \
234                           find objects -type f -print | sed -e 1q)
235
236             # objects directory should not be empty since we are cloning!
237             test -f "$repo/$sample_file" || exit
238
239             l=
240             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
241             then
242                     l=l
243             fi &&
244             rm -f "$GIT_DIR/objects/sample" &&
245             cd "$repo" &&
246             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
247             ;;
248         yes)
249             mkdir -p "$GIT_DIR/objects/info"
250             echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
251             ;;
252         esac
253         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
254         ;;
255 *)
256         case "$repo" in
257         rsync://*)
258                 case "$depth" in
259                 "") ;;
260                 *) die "shallow over rsync not supported" ;;
261                 esac
262                 rsync $quiet -av --ignore-existing  \
263                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
264                 exit
265                 # Look at objects/info/alternates for rsync -- http will
266                 # support it natively and git native ones will do it on the
267                 # remote end.  Not having that file is not a crime.
268                 rsync -q "$repo/objects/info/alternates" \
269                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
270                         rm -f "$GIT_DIR/TMP_ALT"
271                 if test -f "$GIT_DIR/TMP_ALT"
272                 then
273                     ( cd "$D" &&
274                       . git-parse-remote &&
275                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
276                     while read alt
277                     do
278                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
279                         case "$quiet" in
280                         '')     echo >&2 "Getting alternate: $alt" ;;
281                         esac
282                         rsync $quiet -av --ignore-existing  \
283                             --exclude info "$alt" "$GIT_DIR/objects" || exit
284                     done
285                     rm -f "$GIT_DIR/TMP_ALT"
286                 fi
287                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
288                 ;;
289         https://*|http://*|ftp://*)
290                 case "$depth" in
291                 "") ;;
292                 *) die "shallow over http or ftp not supported" ;;
293                 esac
294                 if test -z "@@NO_CURL@@"
295                 then
296                         clone_dumb_http "$repo" "$D"
297                 else
298                         die "http transport not supported, rebuild Git with curl support"
299                 fi
300                 ;;
301         *)
302                 case "$upload_pack" in
303                 '') git-fetch-pack --all -k $quiet $depth $no_progress "$repo";;
304                 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth $no_progress "$repo" ;;
305                 esac >"$GIT_DIR/CLONE_HEAD" ||
306                         die "fetch-pack from '$repo' failed."
307                 ;;
308         esac
309         ;;
310 esac
311 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
312
313 if test -f "$GIT_DIR/CLONE_HEAD"
314 then
315         # Read git-fetch-pack -k output and store the remote branches.
316         if [ -n "$use_separate_remote" ]
317         then
318                 branch_top="remotes/$origin"
319         else
320                 branch_top="heads"
321         fi
322         tag_top="tags"
323         while read sha1 name
324         do
325                 case "$name" in
326                 *'^{}')
327                         continue ;;
328                 HEAD)
329                         destname="REMOTE_HEAD" ;;
330                 refs/heads/*)
331                         destname="refs/$branch_top/${name#refs/heads/}" ;;
332                 refs/tags/*)
333                         destname="refs/$tag_top/${name#refs/tags/}" ;;
334                 *)
335                         continue ;;
336                 esac
337                 git-update-ref -m "clone: from $repo" "$destname" "$sha1" ""
338         done < "$GIT_DIR/CLONE_HEAD"
339 fi
340
341 cd "$D" || exit
342
343 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
344 then
345         # a non-bare repository is always in separate-remote layout
346         remote_top="refs/remotes/$origin"
347         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
348         case "$head_sha1" in
349         'ref: refs/'*)
350                 # Uh-oh, the remote told us (http transport done against
351                 # new style repository with a symref HEAD).
352                 # Ideally we should skip the guesswork but for now
353                 # opt for minimum change.
354                 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
355                 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
356                 ;;
357         esac
358
359         # The name under $remote_top the remote HEAD seems to point at.
360         head_points_at=$(
361                 (
362                         test -f "$GIT_DIR/$remote_top/master" && echo "master"
363                         cd "$GIT_DIR/$remote_top" &&
364                         find . -type f -print | sed -e 's/^\.\///'
365                 ) | (
366                 done=f
367                 while read name
368                 do
369                         test t = $done && continue
370                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
371                         if test "$head_sha1" = "$branch_tip"
372                         then
373                                 echo "$name"
374                                 done=t
375                         fi
376                 done
377                 )
378         )
379
380         # Upstream URL
381         git-config remote."$origin".url "$repo" &&
382
383         # Set up the mappings to track the remote branches.
384         git-config remote."$origin".fetch \
385                 "+refs/heads/*:$remote_top/*" '^$' &&
386
387         # Write out remote.$origin config, and update our "$head_points_at".
388         case "$head_points_at" in
389         ?*)
390                 # Local default branch
391                 git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
392
393                 # Tracking branch for the primary branch at the remote.
394                 git-update-ref HEAD "$head_sha1" &&
395
396                 rm -f "refs/remotes/$origin/HEAD"
397                 git-symbolic-ref "refs/remotes/$origin/HEAD" \
398                         "refs/remotes/$origin/$head_points_at" &&
399
400                 git-config branch."$head_points_at".remote "$origin" &&
401                 git-config branch."$head_points_at".merge "refs/heads/$head_points_at"
402                 ;;
403         '')
404                 # Source had detached HEAD pointing nowhere
405                 git-update-ref --no-deref HEAD "$head_sha1" &&
406                 rm -f "refs/remotes/$origin/HEAD"
407                 ;;
408         esac
409
410         case "$no_checkout" in
411         '')
412                 test "z$quiet" = z -a "z$no_progress" = z && v=-v || v=
413                 git-read-tree -m -u $v HEAD HEAD
414         esac
415 fi
416 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
417
418 trap - 0