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>] [-o <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,-o) usage;;
125 1,--reference) usage ;;
126 *,--reference)
127 shift; reference="$1" ;;
128 *,--reference=*)
129 reference=`expr "$1" : '--reference=\(.*\)'` ;;
130 *,-o)
131 case "$2" in
132 */*)
133 echo >&2 "'$2' is not suitable for an origin name"
134 exit 1
135 esac
136 git-check-ref-format "heads/$2" || {
137 echo >&2 "'$2' is not suitable for a branch name"
138 exit 1
139 }
140 test -z "$origin_override" || {
141 echo >&2 "Do not give more than one -o options."
142 exit 1
143 }
144 origin_override=yes
145 origin="$2"; shift
146 ;;
147 1,-u|1,--upload-pack) usage ;;
148 *,-u|*,--upload-pack)
149 shift
150 upload_pack="--exec=$1" ;;
151 *,-*) usage ;;
152 *) break ;;
153 esac
154do
155 shift
156done
157# --bare implies --no-checkout
159if test yes = "$bare"
160then
161 if test yes = "$origin_override"
162 then
163 echo >&2 '--bare and -o $origin options are incompatible.'
164 exit 1
165 fi
166 if test t = "$use_separate_remote"
167 then
168 echo >&2 '--bare and --use-separate-remote options are incompatible.'
169 exit 1
170 fi
171 no_checkout=yes
172fi
173if test -z "$origin"
175then
176 origin=origin
177fi
178# Turn the source into an absolute path if
180# it is local
181repo="$1"
182local=no
183if base=$(get_repo_base "$repo"); then
184 repo="$base"
185 local=yes
186fi
187dir="$2"
189# Try using "humanish" part of source repo if user didn't specify one
190[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
191[ -e "$dir" ] && echo "$dir already exists." && usage
192mkdir -p "$dir" &&
193D=$(cd "$dir" && pwd) &&
194trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
195case "$bare" in
196yes) GIT_DIR="$D" ;;
197*) GIT_DIR="$D/.git" ;;
198esac && export GIT_DIR && git-init-db || usage
199case "$bare" in
200yes)
201 GIT_DIR="$D" ;;
202*)
203 GIT_DIR="$D/.git" ;;
204esac
205if test -n "$reference"
207then
208 if test -d "$reference"
209 then
210 if test -d "$reference/.git/objects"
211 then
212 reference="$reference/.git"
213 fi
214 reference=$(cd "$reference" && pwd)
215 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
216 (cd "$reference" && tar cf - refs) |
217 (cd "$GIT_DIR/refs" &&
218 mkdir reference-tmp &&
219 cd reference-tmp &&
220 tar xf -)
221 else
222 echo >&2 "$reference: not a local directory." && usage
223 fi
224fi
225rm -f "$GIT_DIR/CLONE_HEAD"
227# We do local magic only when the user tells us to.
229case "$local,$use_local" in
230yes,yes)
231 ( cd "$repo/objects" ) || {
232 echo >&2 "-l flag seen but $repo is not local."
233 exit 1
234 }
235 case "$local_shared" in
237 no)
238 # See if we can hardlink and drop "l" if not.
239 sample_file=$(cd "$repo" && \
240 find objects -type f -print | sed -e 1q)
241 # objects directory should not be empty since we are cloning!
243 test -f "$repo/$sample_file" || exit
244 l=
246 if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
247 then
248 l=l
249 fi &&
250 rm -f "$GIT_DIR/objects/sample" &&
251 cd "$repo" &&
252 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
253 ;;
254 yes)
255 mkdir -p "$GIT_DIR/objects/info"
256 {
257 test -f "$repo/objects/info/alternates" &&
258 cat "$repo/objects/info/alternates";
259 echo "$repo/objects"
260 } >"$GIT_DIR/objects/info/alternates"
261 ;;
262 esac
263 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
264 ;;
265*)
266 case "$repo" in
267 rsync://*)
268 rsync $quiet -av --ignore-existing \
269 --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
270 exit
271 # Look at objects/info/alternates for rsync -- http will
272 # support it natively and git native ones will do it on the
273 # remote end. Not having that file is not a crime.
274 rsync -q "$repo/objects/info/alternates" \
275 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
276 rm -f "$GIT_DIR/TMP_ALT"
277 if test -f "$GIT_DIR/TMP_ALT"
278 then
279 ( cd "$D" &&
280 . git-parse-remote &&
281 resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
282 while read alt
283 do
284 case "$alt" in 'bad alternate: '*) die "$alt";; esac
285 case "$quiet" in
286 '') echo >&2 "Getting alternate: $alt" ;;
287 esac
288 rsync $quiet -av --ignore-existing \
289 --exclude info "$alt" "$GIT_DIR/objects" || exit
290 done
291 rm -f "$GIT_DIR/TMP_ALT"
292 fi
293 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
294 ;;
295 http://*)
296 if test -z "@@NO_CURL@@"
297 then
298 clone_dumb_http "$repo" "$D"
299 else
300 echo >&2 "http transport not supported, rebuild Git with curl support"
301 exit 1
302 fi
303 ;;
304 *)
305 cd "$D" && case "$upload_pack" in
306 '') git-fetch-pack --all -k $quiet "$repo" ;;
307 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
308 esac >"$GIT_DIR/CLONE_HEAD" || {
309 echo >&2 "fetch-pack from '$repo' failed."
310 exit 1
311 }
312 ;;
313 esac
314 ;;
315esac
316test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
317if test -f "$GIT_DIR/CLONE_HEAD"
319then
320 # Figure out where the remote HEAD points at.
321 perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
322fi
323cd "$D" || exit
325if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
327then
328 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
329 # Figure out which remote branch HEAD points at.
330 case "$use_separate_remote" in
331 '') remote_top=refs/heads ;;
332 *) remote_top="refs/remotes/$origin" ;;
333 esac
334 # What to use to track the remote primary branch
336 if test -n "$use_separate_remote"
337 then
338 origin_tracking="remotes/$origin/master"
339 else
340 origin_tracking="heads/$origin"
341 fi
342 # The name under $remote_top the remote HEAD seems to point at
344 head_points_at=$(
345 (
346 echo "master"
347 cd "$GIT_DIR/$remote_top" &&
348 find . -type f -print | sed -e 's/^\.\///'
349 ) | (
350 done=f
351 while read name
352 do
353 test t = $done && continue
354 branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
355 if test "$head_sha1" = "$branch_tip"
356 then
357 echo "$name"
358 done=t
359 fi
360 done
361 )
362 )
363 # Write out remotes/$origin file.
365 case "$head_points_at" in
366 ?*)
367 mkdir -p "$GIT_DIR/remotes" &&
368 echo >"$GIT_DIR/remotes/$origin" \
369 "URL: $repo
370Pull: refs/heads/$head_points_at:refs/$origin_tracking" &&
371 case "$use_separate_remote" in
372 t) git-update-ref HEAD "$head_sha1" ;;
373 *) git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) ;;
374 esac &&
375 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
376 while read dotslref
377 do
378 name=`expr "$dotslref" : './\(.*\)'` &&
379 test "$head_points_at" = "$name" ||
380 test "$origin" = "$name" ||
381 echo "Pull: refs/heads/${name}:$remote_top/${name}"
382 done >>"$GIT_DIR/remotes/$origin" &&
383 case "$use_separate_remote" in
384 t)
385 rm -f "refs/remotes/$origin/HEAD"
386 git-symbolic-ref "refs/remotes/$origin/HEAD" \
387 "refs/remotes/$origin/$head_points_at"
388 esac
389 esac
390 case "$no_checkout" in
392 '')
393 git-read-tree -m -u -v HEAD HEAD
394 esac
395fi
396rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
397trap - exit
399