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, $tag_top);
94 next;
95 }
96}
97close FH;
98'
99quiet=
101local=no
102use_local=no
103local_shared=no
104no_checkout=
105upload_pack=
106bare=
107reference=
108origin=
109origin_override=
110use_separate_remote=
111while
112 case "$#,$1" in
113 0,*) break ;;
114 *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
115 *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
116 no_checkout=yes ;;
117 *,--na|*,--nak|*,--nake|*,--naked|\
118 *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
119 *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
120 *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
121 local_shared=yes; use_local=yes ;;
122 *,-q|*,--quiet) quiet=-q ;;
123 *,--use-separate-remote)
124 use_separate_remote=t ;;
125 1,--reference) usage ;;
126 *,--reference)
127 shift; reference="$1" ;;
128 *,--reference=*)
129 reference=`expr "$1" : '--reference=\(.*\)'` ;;
130 *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
131 case "$2" in
132 '')
133 usage ;;
134 */*)
135 echo >&2 "'$2' is not suitable for an origin name"
136 exit 1
137 esac
138 git-check-ref-format "heads/$2" || {
139 echo >&2 "'$2' is not suitable for a branch name"
140 exit 1
141 }
142 test -z "$origin_override" || {
143 echo >&2 "Do not give more than one --origin options."
144 exit 1
145 }
146 origin_override=yes
147 origin="$2"; shift
148 ;;
149 1,-u|1,--upload-pack) usage ;;
150 *,-u|*,--upload-pack)
151 shift
152 upload_pack="--exec=$1" ;;
153 *,-*) usage ;;
154 *) break ;;
155 esac
156do
157 shift
158done
159repo="$1"
161if test -z "$repo"
162then
163 echo >&2 'you must specify a repository to clone.'
164 exit 1
165fi
166# --bare implies --no-checkout
168if test yes = "$bare"
169then
170 if test yes = "$origin_override"
171 then
172 echo >&2 '--bare and --origin $origin options are incompatible.'
173 exit 1
174 fi
175 if test t = "$use_separate_remote"
176 then
177 echo >&2 '--bare and --use-separate-remote options are incompatible.'
178 exit 1
179 fi
180 no_checkout=yes
181fi
182if test -z "$origin"
184then
185 origin=origin
186fi
187# Turn the source into an absolute path if
189# it is local
190if base=$(get_repo_base "$repo"); then
191 repo="$base"
192 local=yes
193fi
194dir="$2"
196# Try using "humanish" part of source repo if user didn't specify one
197[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
198[ -e "$dir" ] && echo "$dir already exists." && usage
199mkdir -p "$dir" &&
200D=$(cd "$dir" && pwd) &&
201trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
202case "$bare" in
203yes) GIT_DIR="$D" ;;
204*) GIT_DIR="$D/.git" ;;
205esac && export GIT_DIR && git-init-db || usage
206case "$bare" in
207yes)
208 GIT_DIR="$D" ;;
209*)
210 GIT_DIR="$D/.git" ;;
211esac
212if test -n "$reference"
214then
215 if test -d "$reference"
216 then
217 if test -d "$reference/.git/objects"
218 then
219 reference="$reference/.git"
220 fi
221 reference=$(cd "$reference" && pwd)
222 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
223 (cd "$reference" && tar cf - refs) |
224 (cd "$GIT_DIR/refs" &&
225 mkdir reference-tmp &&
226 cd reference-tmp &&
227 tar xf -)
228 else
229 echo >&2 "$reference: not a local directory." && usage
230 fi
231fi
232rm -f "$GIT_DIR/CLONE_HEAD"
234# We do local magic only when the user tells us to.
236case "$local,$use_local" in
237yes,yes)
238 ( cd "$repo/objects" ) || {
239 echo >&2 "-l flag seen but $repo is not local."
240 exit 1
241 }
242 case "$local_shared" in
244 no)
245 # See if we can hardlink and drop "l" if not.
246 sample_file=$(cd "$repo" && \
247 find objects -type f -print | sed -e 1q)
248 # objects directory should not be empty since we are cloning!
250 test -f "$repo/$sample_file" || exit
251 l=
253 if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
254 then
255 l=l
256 fi &&
257 rm -f "$GIT_DIR/objects/sample" &&
258 cd "$repo" &&
259 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
260 ;;
261 yes)
262 mkdir -p "$GIT_DIR/objects/info"
263 {
264 test -f "$repo/objects/info/alternates" &&
265 cat "$repo/objects/info/alternates";
266 echo "$repo/objects"
267 } >"$GIT_DIR/objects/info/alternates"
268 ;;
269 esac
270 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
271 ;;
272*)
273 case "$repo" in
274 rsync://*)
275 rsync $quiet -av --ignore-existing \
276 --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
277 exit
278 # Look at objects/info/alternates for rsync -- http will
279 # support it natively and git native ones will do it on the
280 # remote end. Not having that file is not a crime.
281 rsync -q "$repo/objects/info/alternates" \
282 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
283 rm -f "$GIT_DIR/TMP_ALT"
284 if test -f "$GIT_DIR/TMP_ALT"
285 then
286 ( cd "$D" &&
287 . git-parse-remote &&
288 resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
289 while read alt
290 do
291 case "$alt" in 'bad alternate: '*) die "$alt";; esac
292 case "$quiet" in
293 '') echo >&2 "Getting alternate: $alt" ;;
294 esac
295 rsync $quiet -av --ignore-existing \
296 --exclude info "$alt" "$GIT_DIR/objects" || exit
297 done
298 rm -f "$GIT_DIR/TMP_ALT"
299 fi
300 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
301 ;;
302 http://*)
303 if test -z "@@NO_CURL@@"
304 then
305 clone_dumb_http "$repo" "$D"
306 else
307 echo >&2 "http transport not supported, rebuild Git with curl support"
308 exit 1
309 fi
310 ;;
311 *)
312 cd "$D" && case "$upload_pack" in
313 '') git-fetch-pack --all -k $quiet "$repo" ;;
314 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
315 esac >"$GIT_DIR/CLONE_HEAD" || {
316 echo >&2 "fetch-pack from '$repo' failed."
317 exit 1
318 }
319 ;;
320 esac
321 ;;
322esac
323test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
324if test -f "$GIT_DIR/CLONE_HEAD"
326then
327 # Figure out where the remote HEAD points at.
328 perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
329fi
330cd "$D" || exit
332if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
334then
335 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
336 # Figure out which remote branch HEAD points at.
337 case "$use_separate_remote" in
338 '') remote_top=refs/heads ;;
339 *) remote_top="refs/remotes/$origin" ;;
340 esac
341 # What to use to track the remote primary branch
343 if test -n "$use_separate_remote"
344 then
345 origin_tracking="remotes/$origin/master"
346 else
347 origin_tracking="heads/$origin"
348 fi
349 # The name under $remote_top the remote HEAD seems to point at
351 head_points_at=$(
352 (
353 echo "master"
354 cd "$GIT_DIR/$remote_top" &&
355 find . -type f -print | sed -e 's/^\.\///'
356 ) | (
357 done=f
358 while read name
359 do
360 test t = $done && continue
361 branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
362 if test "$head_sha1" = "$branch_tip"
363 then
364 echo "$name"
365 done=t
366 fi
367 done
368 )
369 )
370 # Write out remotes/$origin file.
372 case "$head_points_at" in
373 ?*)
374 mkdir -p "$GIT_DIR/remotes" &&
375 echo >"$GIT_DIR/remotes/$origin" \
376 "URL: $repo
377Pull: refs/heads/$head_points_at:refs/$origin_tracking" &&
378 case "$use_separate_remote" in
379 t) git-update-ref HEAD "$head_sha1" ;;
380 *) git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) ;;
381 esac &&
382 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
383 while read dotslref
384 do
385 name=`expr "$dotslref" : './\(.*\)'` &&
386 test "$head_points_at" = "$name" ||
387 test "$origin" = "$name" ||
388 echo "Pull: refs/heads/${name}:$remote_top/${name}"
389 done >>"$GIT_DIR/remotes/$origin" &&
390 case "$use_separate_remote" in
391 t)
392 rm -f "refs/remotes/$origin/HEAD"
393 git-symbolic-ref "refs/remotes/$origin/HEAD" \
394 "refs/remotes/$origin/$head_points_at"
395 esac
396 esac
397 case "$no_checkout" in
399 '')
400 git-read-tree -m -u -v HEAD HEAD
401 esac
402fi
403rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
404trap - exit
406