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