0e8a57d2b499dd4f444ba8d93fb271ec88c222c7
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 [--use-separate-remote] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [-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 echo >&2 "Cannot get remote repository information.
36Perhaps git-update-server-info needs to be run there?"
37 exit 1;
38 }
39 while read sha1 refname
40 do
41 name=`expr "$refname" : 'refs/\(.*\)'` &&
42 case "$name" in
43 *^*) continue;;
44 esac
45 if test -n "$use_separate_remote" &&
46 branch_name=`expr "$name" : 'heads/\(.*\)'`
47 then
48 tname="remotes/$origin/$branch_name"
49 else
50 tname=$name
51 fi
52 git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
53 done <"$clone_tmp/refs"
54 rm -fr "$clone_tmp"
55 http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD"
56}
57# Read git-fetch-pack -k output and store the remote branches.
59copy_refs='
60use File::Path qw(mkpath);
61use File::Basename qw(dirname);
62my $git_dir = $ARGV[0];
63my $use_separate_remote = $ARGV[1];
64my $origin = $ARGV[2];
65my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
67my $tag_top = "tags";
68sub store {
70 my ($sha1, $name, $top) = @_;
71 $name = "$git_dir/refs/$top/$name";
72 mkpath(dirname($name));
73 open O, ">", "$name";
74 print O "$sha1\n";
75 close O;
76}
77open FH, "<", "$git_dir/CLONE_HEAD";
79while (<FH>) {
80 my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
81 next if ($name =~ /\^\173/);
82 if ($name eq "HEAD") {
83 open O, ">", "$git_dir/REMOTE_HEAD";
84 print O "$sha1\n";
85 close O;
86 next;
87 }
88 if ($name =~ s/^refs\/heads\///) {
89 store($sha1, $name, $branch_top);
90 next;
91 }
92 if ($name =~ s/^refs\/tags\///) {
93 store($sha1, $name, $tag_top);
94 next;
95 }
96}
97close FH;
98'
99quiet=
101use_local=no
102local_shared=no
103no_checkout=
104upload_pack=
105bare=
106reference=
107origin=
108origin_override=
109use_separate_remote=
110while
111 case "$#,$1" in
112 0,*) break ;;
113 *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
114 *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
115 no_checkout=yes ;;
116 *,--na|*,--nak|*,--nake|*,--naked|\
117 *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
118 *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
119 *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
120 local_shared=yes; use_local=yes ;;
121 *,-q|*,--quiet) quiet=-q ;;
122 *,--use-separate-remote)
123 use_separate_remote=t ;;
124 1,--reference) usage ;;
125 *,--reference)
126 shift; reference="$1" ;;
127 *,--reference=*)
128 reference=`expr "$1" : '--reference=\(.*\)'` ;;
129 *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
130 case "$2" in
131 '')
132 usage ;;
133 */*)
134 echo >&2 "'$2' is not suitable for an origin name"
135 exit 1
136 esac
137 git-check-ref-format "heads/$2" || {
138 echo >&2 "'$2' is not suitable for a branch name"
139 exit 1
140 }
141 test -z "$origin_override" || {
142 echo >&2 "Do not give more than one --origin options."
143 exit 1
144 }
145 origin_override=yes
146 origin="$2"; shift
147 ;;
148 1,-u|1,--upload-pack) usage ;;
149 *,-u|*,--upload-pack)
150 shift
151 upload_pack="--exec=$1" ;;
152 *,-*) usage ;;
153 *) break ;;
154 esac
155do
156 shift
157done
158# --bare implies --no-checkout
160if test yes = "$bare"
161then
162 if test yes = "$origin_override"
163 then
164 echo >&2 '--bare and --origin $origin options are incompatible.'
165 exit 1
166 fi
167 if test t = "$use_separate_remote"
168 then
169 echo >&2 '--bare and --use-separate-remote options are incompatible.'
170 exit 1
171 fi
172 no_checkout=yes
173fi
174if test -z "$origin"
176then
177 origin=origin
178fi
179# Turn the source into an absolute path if
181# it is local
182repo="$1"
183local=no
184if base=$(get_repo_base "$repo"); then
185 repo="$base"
186 local=yes
187fi
188dir="$2"
190# Try using "humanish" part of source repo if user didn't specify one
191[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
192[ -e "$dir" ] && echo "$dir already exists." && usage
193mkdir -p "$dir" &&
194D=$(cd "$dir" && pwd) &&
195trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
196case "$bare" in
197yes) GIT_DIR="$D" ;;
198*) GIT_DIR="$D/.git" ;;
199esac && export GIT_DIR && git-init-db || usage
200case "$bare" in
201yes)
202 GIT_DIR="$D" ;;
203*)
204 GIT_DIR="$D/.git" ;;
205esac
206if test -n "$reference"
208then
209 if test -d "$reference"
210 then
211 if test -d "$reference/.git/objects"
212 then
213 reference="$reference/.git"
214 fi
215 reference=$(cd "$reference" && pwd)
216 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
217 (cd "$reference" && tar cf - refs) |
218 (cd "$GIT_DIR/refs" &&
219 mkdir reference-tmp &&
220 cd reference-tmp &&
221 tar xf -)
222 else
223 echo >&2 "$reference: not a local directory." && usage
224 fi
225fi
226rm -f "$GIT_DIR/CLONE_HEAD"
228# We do local magic only when the user tells us to.
230case "$local,$use_local" in
231yes,yes)
232 ( cd "$repo/objects" ) || {
233 echo >&2 "-l flag seen but $repo is not local."
234 exit 1
235 }
236 case "$local_shared" in
238 no)
239 # See if we can hardlink and drop "l" if not.
240 sample_file=$(cd "$repo" && \
241 find objects -type f -print | sed -e 1q)
242 # objects directory should not be empty since we are cloning!
244 test -f "$repo/$sample_file" || exit
245 l=
247 if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
248 then
249 l=l
250 fi &&
251 rm -f "$GIT_DIR/objects/sample" &&
252 cd "$repo" &&
253 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
254 ;;
255 yes)
256 mkdir -p "$GIT_DIR/objects/info"
257 {
258 test -f "$repo/objects/info/alternates" &&
259 cat "$repo/objects/info/alternates";
260 echo "$repo/objects"
261 } >"$GIT_DIR/objects/info/alternates"
262 ;;
263 esac
264 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
265 ;;
266*)
267 case "$repo" in
268 rsync://*)
269 rsync $quiet -av --ignore-existing \
270 --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
271 exit
272 # Look at objects/info/alternates for rsync -- http will
273 # support it natively and git native ones will do it on the
274 # remote end. Not having that file is not a crime.
275 rsync -q "$repo/objects/info/alternates" \
276 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
277 rm -f "$GIT_DIR/TMP_ALT"
278 if test -f "$GIT_DIR/TMP_ALT"
279 then
280 ( cd "$D" &&
281 . git-parse-remote &&
282 resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
283 while read alt
284 do
285 case "$alt" in 'bad alternate: '*) die "$alt";; esac
286 case "$quiet" in
287 '') echo >&2 "Getting alternate: $alt" ;;
288 esac
289 rsync $quiet -av --ignore-existing \
290 --exclude info "$alt" "$GIT_DIR/objects" || exit
291 done
292 rm -f "$GIT_DIR/TMP_ALT"
293 fi
294 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
295 ;;
296 http://*)
297 if test -z "@@NO_CURL@@"
298 then
299 clone_dumb_http "$repo" "$D"
300 else
301 echo >&2 "http transport not supported, rebuild Git with curl support"
302 exit 1
303 fi
304 ;;
305 *)
306 cd "$D" && case "$upload_pack" in
307 '') git-fetch-pack --all -k $quiet "$repo" ;;
308 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
309 esac >"$GIT_DIR/CLONE_HEAD" || {
310 echo >&2 "fetch-pack from '$repo' failed."
311 exit 1
312 }
313 ;;
314 esac
315 ;;
316esac
317test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
318if test -f "$GIT_DIR/CLONE_HEAD"
320then
321 # Figure out where the remote HEAD points at.
322 perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
323fi
324cd "$D" || exit
326if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
328then
329 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
330 # Figure out which remote branch HEAD points at.
331 case "$use_separate_remote" in
332 '') remote_top=refs/heads ;;
333 *) remote_top="refs/remotes/$origin" ;;
334 esac
335 # What to use to track the remote primary branch
337 if test -n "$use_separate_remote"
338 then
339 origin_tracking="remotes/$origin/master"
340 else
341 origin_tracking="heads/$origin"
342 fi
343 # The name under $remote_top the remote HEAD seems to point at
345 head_points_at=$(
346 (
347 echo "master"
348 cd "$GIT_DIR/$remote_top" &&
349 find . -type f -print | sed -e 's/^\.\///'
350 ) | (
351 done=f
352 while read name
353 do
354 test t = $done && continue
355 branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
356 if test "$head_sha1" = "$branch_tip"
357 then
358 echo "$name"
359 done=t
360 fi
361 done
362 )
363 )
364 # Write out remotes/$origin file.
366 case "$head_points_at" in
367 ?*)
368 mkdir -p "$GIT_DIR/remotes" &&
369 echo >"$GIT_DIR/remotes/$origin" \
370 "URL: $repo
371Pull: refs/heads/$head_points_at:refs/$origin_tracking" &&
372 case "$use_separate_remote" in
373 t) git-update-ref HEAD "$head_sha1" ;;
374 *) git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) ;;
375 esac &&
376 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
377 while read dotslref
378 do
379 name=`expr "$dotslref" : './\(.*\)'` &&
380 test "$head_points_at" = "$name" ||
381 test "$origin" = "$name" ||
382 echo "Pull: refs/heads/${name}:$remote_top/${name}"
383 done >>"$GIT_DIR/remotes/$origin" &&
384 case "$use_separate_remote" in
385 t)
386 rm -f "refs/remotes/$origin/HEAD"
387 git-symbolic-ref "refs/remotes/$origin/HEAD" \
388 "refs/remotes/$origin/$head_points_at"
389 esac
390 esac
391 case "$no_checkout" in
393 '')
394 git-read-tree -m -u -v HEAD HEAD
395 esac
396fi
397rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
398trap - exit
400