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
10die() {
12 echo >&2 "$@"
13 exit 1
14}
15usage() {
17 die "Usage: $0 [--template=<template_directory>] [--no-separate-remote] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [-n] <repo> [<dir>]"
18}
19get_repo_base() {
21 (cd "$1" && (cd .git ; pwd)) 2> /dev/null
22}
23if [ -n "$GIT_SSL_NO_VERIFY" ]; then
25 curl_extra_args="-k"
26fi
27http_fetch () {
29 # $1 = Remote, $2 = Local
30 curl -nsfL $curl_extra_args "$1" >"$2"
31}
32clone_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-repo-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.
44Perhaps 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# Read git-fetch-pack -k output and store the remote branches.
70copy_refs='
71use File::Path qw(mkpath);
72use File::Basename qw(dirname);
73my $git_dir = $ARGV[0];
74my $use_separate_remote = $ARGV[1];
75my $origin = $ARGV[2];
76my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
78my $tag_top = "tags";
79sub store {
81 my ($sha1, $name, $top) = @_;
82 $name = "$git_dir/refs/$top/$name";
83 mkpath(dirname($name));
84 open O, ">", "$name";
85 print O "$sha1\n";
86 close O;
87}
88open FH, "<", "$git_dir/CLONE_HEAD";
90while (<FH>) {
91 my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
92 next if ($name =~ /\^\173/);
93 if ($name eq "HEAD") {
94 open O, ">", "$git_dir/REMOTE_HEAD";
95 print O "$sha1\n";
96 close O;
97 next;
98 }
99 if ($name =~ s/^refs\/heads\///) {
100 store($sha1, $name, $branch_top);
101 next;
102 }
103 if ($name =~ s/^refs\/tags\///) {
104 store($sha1, $name, $tag_top);
105 next;
106 }
107}
108close FH;
109'
110quiet=
112local=no
113use_local=no
114local_shared=no
115unset template
116no_checkout=
117upload_pack=
118bare=
119reference=
120origin=
121origin_override=
122use_separate_remote=t
123while
124 case "$#,$1" in
125 0,*) break ;;
126 *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
127 *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
128 no_checkout=yes ;;
129 *,--na|*,--nak|*,--nake|*,--naked|\
130 *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
131 *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
132 *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
133 local_shared=yes; use_local=yes ;;
134 1,--template) usage ;;
135 *,--template)
136 shift; template="--template=$1" ;;
137 *,--template=*)
138 template="$1" ;;
139 *,-q|*,--quiet) quiet=-q ;;
140 *,--use-separate-remote)
141 # default
142 use_separate_remote=t ;;
143 *,--no-separate-remote)
144 use_separate_remote= ;;
145 1,--reference) usage ;;
146 *,--reference)
147 shift; reference="$1" ;;
148 *,--reference=*)
149 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
150 *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
151 case "$2" in
152 '')
153 usage ;;
154 */*)
155 die "'$2' is not suitable for an origin name"
156 esac
157 git-check-ref-format "heads/$2" ||
158 die "'$2' is not suitable for a branch name"
159 test -z "$origin_override" ||
160 die "Do not give more than one --origin options."
161 origin_override=yes
162 origin="$2"; shift
163 ;;
164 1,-u|1,--upload-pack) usage ;;
165 *,-u|*,--upload-pack)
166 shift
167 upload_pack="--exec=$1" ;;
168 *,-*) usage ;;
169 *) break ;;
170 esac
171do
172 shift
173done
174repo="$1"
176test -n "$repo" ||
177 die 'you must specify a repository to clone.'
178# --bare implies --no-checkout and --no-separate-remote
180if test yes = "$bare"
181then
182 if test yes = "$origin_override"
183 then
184 die '--bare and --origin $origin options are incompatible.'
185 fi
186 no_checkout=yes
187 use_separate_remote=
188fi
189if test -z "$origin"
191then
192 origin=origin
193fi
194# Turn the source into an absolute path if
196# it is local
197if base=$(get_repo_base "$repo"); then
198 repo="$base"
199 local=yes
200fi
201dir="$2"
203# Try using "humanish" part of source repo if user didn't specify one
204[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
205[ -e "$dir" ] && die "destination directory '$dir' already exists."
206mkdir -p "$dir" &&
207D=$(cd "$dir" && pwd) &&
208trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
209case "$bare" in
210yes)
211 GIT_DIR="$D" ;;
212*)
213 GIT_DIR="$D/.git" ;;
214esac && export GIT_DIR && git-init-db ${template+"$template"} || usage
215if test -n "$reference"
217then
218 if test -d "$reference"
219 then
220 if test -d "$reference/.git/objects"
221 then
222 reference="$reference/.git"
223 fi
224 reference=$(cd "$reference" && pwd)
225 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
226 (cd "$reference" && tar cf - refs) |
227 (cd "$GIT_DIR/refs" &&
228 mkdir reference-tmp &&
229 cd reference-tmp &&
230 tar xf -)
231 else
232 die "reference repository '$reference' is not a local directory."
233 fi
234fi
235rm -f "$GIT_DIR/CLONE_HEAD"
237# We do local magic only when the user tells us to.
239case "$local,$use_local" in
240yes,yes)
241 ( cd "$repo/objects" ) ||
242 die "-l flag seen but repository '$repo' is not local."
243 case "$local_shared" in
245 no)
246 # See if we can hardlink and drop "l" if not.
247 sample_file=$(cd "$repo" && \
248 find objects -type f -print | sed -e 1q)
249 # objects directory should not be empty since we are cloning!
251 test -f "$repo/$sample_file" || exit
252 l=
254 if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
255 then
256 l=l
257 fi &&
258 rm -f "$GIT_DIR/objects/sample" &&
259 cd "$repo" &&
260 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
261 ;;
262 yes)
263 mkdir -p "$GIT_DIR/objects/info"
264 echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
265 ;;
266 esac
267 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
268 ;;
269*)
270 case "$repo" in
271 rsync://*)
272 rsync $quiet -av --ignore-existing \
273 --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
274 exit
275 # Look at objects/info/alternates for rsync -- http will
276 # support it natively and git native ones will do it on the
277 # remote end. Not having that file is not a crime.
278 rsync -q "$repo/objects/info/alternates" \
279 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
280 rm -f "$GIT_DIR/TMP_ALT"
281 if test -f "$GIT_DIR/TMP_ALT"
282 then
283 ( cd "$D" &&
284 . git-parse-remote &&
285 resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
286 while read alt
287 do
288 case "$alt" in 'bad alternate: '*) die "$alt";; esac
289 case "$quiet" in
290 '') echo >&2 "Getting alternate: $alt" ;;
291 esac
292 rsync $quiet -av --ignore-existing \
293 --exclude info "$alt" "$GIT_DIR/objects" || exit
294 done
295 rm -f "$GIT_DIR/TMP_ALT"
296 fi
297 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
298 ;;
299 https://*|http://*|ftp://*)
300 if test -z "@@NO_CURL@@"
301 then
302 clone_dumb_http "$repo" "$D"
303 else
304 die "http transport not supported, rebuild Git with curl support"
305 fi
306 ;;
307 *)
308 case "$upload_pack" in
309 '') git-fetch-pack --all -k $quiet "$repo" ;;
310 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
311 esac >"$GIT_DIR/CLONE_HEAD" ||
312 die "fetch-pack from '$repo' failed."
313 ;;
314 esac
315 ;;
316esac
317test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
318if test -f "$GIT_DIR/CLONE_HEAD"
320then
321 # Read git-fetch-pack -k output and store the remote branches.
322 @@PERL@@ -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin" ||
323 exit
324fi
325cd "$D" || exit
327if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
329then
330 # Figure out which remote branch HEAD points at.
331 case "$use_separate_remote" in
332 '') remote_top=refs/heads ;;
333 *) remote_top="refs/remotes/$origin" ;;
334 esac
335 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
337 case "$head_sha1" in
338 'ref: refs/'*)
339 # Uh-oh, the remote told us (http transport done against
340 # new style repository with a symref HEAD).
341 # Ideally we should skip the guesswork but for now
342 # opt for minimum change.
343 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
344 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
345 ;;
346 esac
347 # The name under $remote_top the remote HEAD seems to point at.
349 head_points_at=$(
350 (
351 echo "master"
352 cd "$GIT_DIR/$remote_top" &&
353 find . -type f -print | sed -e 's/^\.\///'
354 ) | (
355 done=f
356 while read name
357 do
358 test t = $done && continue
359 branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
360 if test "$head_sha1" = "$branch_tip"
361 then
362 echo "$name"
363 done=t
364 fi
365 done
366 )
367 )
368 # Write out remotes/$origin file, and update our "$head_points_at".
370 case "$head_points_at" in
371 ?*)
372 mkdir -p "$GIT_DIR/remotes" &&
373 git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
374 case "$use_separate_remote" in
375 t) origin_track="$remote_top/$head_points_at"
376 git-update-ref HEAD "$head_sha1" ;;
377 *) origin_track="$remote_top/$origin"
378 git-update-ref "refs/heads/$origin" "$head_sha1" ;;
379 esac &&
380 git-repo-config remote."$origin".url "$repo" &&
381 git-repo-config remote."$origin".fetch \
382 "refs/heads/$head_points_at:$origin_track" &&
383 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
384 while read dotslref
385 do
386 name=`expr "$dotslref" : './\(.*\)'`
387 if test "z$head_points_at" = "z$name"
388 then
389 continue
390 fi
391 if test "$use_separate_remote" = '' &&
392 test "z$origin" = "z$name"
393 then
394 continue
395 fi
396 git-repo-config remote."$origin".fetch "refs/heads/${name}:$remote_top/${name}" '^$'
397 done &&
398 case "$use_separate_remote" in
399 t)
400 rm -f "refs/remotes/$origin/HEAD"
401 git-symbolic-ref "refs/remotes/$origin/HEAD" \
402 "refs/remotes/$origin/$head_points_at"
403 esac &&
404 git-repo-config branch."$head_points_at".remote "$origin" &&
405 git-repo-config branch."$head_points_at".merge "refs/heads/$head_points_at"
406 esac
407 case "$no_checkout" in
409 '')
410 test "z$quiet" = z && v=-v || v=
411 git-read-tree -m -u $v HEAD HEAD
412 esac
413fi
414rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
415trap - 0
417