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 [--template=<template_directory>] [--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_DIR/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 "z$refname" : 'zrefs/\(.*\)'` &&
42 case "$name" in
43 *^*) continue;;
44 esac
45 if test -n "$use_separate_remote" &&
46 branch_name=`expr "z$name" : 'zheads/\(.*\)'`
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 rm -f "$GIT_DIR/REMOTE_HEAD"
57}
58# Read git-fetch-pack -k output and store the remote branches.
60copy_refs='
61use File::Path qw(mkpath);
62use File::Basename qw(dirname);
63my $git_dir = $ARGV[0];
64my $use_separate_remote = $ARGV[1];
65my $origin = $ARGV[2];
66my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
68my $tag_top = "tags";
69sub store {
71 my ($sha1, $name, $top) = @_;
72 $name = "$git_dir/refs/$top/$name";
73 mkpath(dirname($name));
74 open O, ">", "$name";
75 print O "$sha1\n";
76 close O;
77}
78open FH, "<", "$git_dir/CLONE_HEAD";
80while (<FH>) {
81 my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
82 next if ($name =~ /\^\173/);
83 if ($name eq "HEAD") {
84 open O, ">", "$git_dir/REMOTE_HEAD";
85 print O "$sha1\n";
86 close O;
87 next;
88 }
89 if ($name =~ s/^refs\/heads\///) {
90 store($sha1, $name, $branch_top);
91 next;
92 }
93 if ($name =~ s/^refs\/tags\///) {
94 store($sha1, $name, $tag_top);
95 next;
96 }
97}
98close FH;
99'
100quiet=
102local=no
103use_local=no
104local_shared=no
105unset template
106no_checkout=
107upload_pack=
108bare=
109reference=
110origin=
111origin_override=
112use_separate_remote=
113while
114 case "$#,$1" in
115 0,*) break ;;
116 *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
117 *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
118 no_checkout=yes ;;
119 *,--na|*,--nak|*,--nake|*,--naked|\
120 *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
121 *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
122 *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
123 local_shared=yes; use_local=yes ;;
124 1,--template) usage ;;
125 *,--template)
126 shift; template="--template=$1" ;;
127 *,--template=*)
128 template="$1" ;;
129 *,-q|*,--quiet) quiet=-q ;;
130 *,--use-separate-remote)
131 use_separate_remote=t ;;
132 1,--reference) usage ;;
133 *,--reference)
134 shift; reference="$1" ;;
135 *,--reference=*)
136 reference=`expr "$1" : '--reference=\(.*\)'` ;;
137 *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
138 case "$2" in
139 '')
140 usage ;;
141 */*)
142 echo >&2 "'$2' is not suitable for an origin name"
143 exit 1
144 esac
145 git-check-ref-format "heads/$2" || {
146 echo >&2 "'$2' is not suitable for a branch name"
147 exit 1
148 }
149 test -z "$origin_override" || {
150 echo >&2 "Do not give more than one --origin options."
151 exit 1
152 }
153 origin_override=yes
154 origin="$2"; shift
155 ;;
156 1,-u|1,--upload-pack) usage ;;
157 *,-u|*,--upload-pack)
158 shift
159 upload_pack="--exec=$1" ;;
160 *,-*) usage ;;
161 *) break ;;
162 esac
163do
164 shift
165done
166repo="$1"
168if test -z "$repo"
169then
170 echo >&2 'you must specify a repository to clone.'
171 exit 1
172fi
173# --bare implies --no-checkout
175if test yes = "$bare"
176then
177 if test yes = "$origin_override"
178 then
179 echo >&2 '--bare and --origin $origin options are incompatible.'
180 exit 1
181 fi
182 if test t = "$use_separate_remote"
183 then
184 echo >&2 '--bare and --use-separate-remote options are incompatible.'
185 exit 1
186 fi
187 no_checkout=yes
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 "$dir" ] && echo "$dir already exists." && usage
206mkdir -p "$dir" &&
207D=$(cd "$dir" && pwd) &&
208trap 'err=$?; cd ..; rm -r "$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 echo >&2 "$reference: not a local directory." && usage
233 fi
234fi
235rm -f "$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 echo >&2 "-l flag seen but $repo is not local."
243 exit 1
244 }
245 case "$local_shared" in
247 no)
248 # See if we can hardlink and drop "l" if not.
249 sample_file=$(cd "$repo" && \
250 find objects -type f -print | sed -e 1q)
251 # objects directory should not be empty since we are cloning!
253 test -f "$repo/$sample_file" || exit
254 l=
256 if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
257 then
258 l=l
259 fi &&
260 rm -f "$GIT_DIR/objects/sample" &&
261 cd "$repo" &&
262 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
263 ;;
264 yes)
265 mkdir -p "$GIT_DIR/objects/info"
266 echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
267 ;;
268 esac
269 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
270 ;;
271*)
272 case "$repo" in
273 rsync://*)
274 rsync $quiet -av --ignore-existing \
275 --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
276 exit
277 # Look at objects/info/alternates for rsync -- http will
278 # support it natively and git native ones will do it on the
279 # remote end. Not having that file is not a crime.
280 rsync -q "$repo/objects/info/alternates" \
281 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
282 rm -f "$GIT_DIR/TMP_ALT"
283 if test -f "$GIT_DIR/TMP_ALT"
284 then
285 ( cd "$D" &&
286 . git-parse-remote &&
287 resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
288 while read alt
289 do
290 case "$alt" in 'bad alternate: '*) die "$alt";; esac
291 case "$quiet" in
292 '') echo >&2 "Getting alternate: $alt" ;;
293 esac
294 rsync $quiet -av --ignore-existing \
295 --exclude info "$alt" "$GIT_DIR/objects" || exit
296 done
297 rm -f "$GIT_DIR/TMP_ALT"
298 fi
299 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
300 ;;
301 http://*)
302 if test -z "@@NO_CURL@@"
303 then
304 clone_dumb_http "$repo" "$D"
305 else
306 echo >&2 "http transport not supported, rebuild Git with curl support"
307 exit 1
308 fi
309 ;;
310 *)
311 cd "$D" && case "$upload_pack" in
312 '') git-fetch-pack --all -k $quiet "$repo" ;;
313 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
314 esac >"$GIT_DIR/CLONE_HEAD" || {
315 echo >&2 "fetch-pack from '$repo' failed."
316 exit 1
317 }
318 ;;
319 esac
320 ;;
321esac
322test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
323if test -f "$GIT_DIR/CLONE_HEAD"
325then
326 # Read git-fetch-pack -k output and store the remote branches.
327 perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
328fi
329cd "$D" || exit
331if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
333then
334 # Figure out which remote branch HEAD points at.
335 case "$use_separate_remote" in
336 '') remote_top=refs/heads ;;
337 *) remote_top="refs/remotes/$origin" ;;
338 esac
339 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
341 case "$head_sha1" in
342 'ref: refs/'*)
343 # Uh-oh, the remote told us (http transport done against
344 # new style repository with a symref HEAD).
345 # Ideally we should skip the guesswork but for now
346 # opt for minimum change.
347 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
348 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
349 ;;
350 esac
351 # The name under $remote_top the remote HEAD seems to point at.
353 head_points_at=$(
354 (
355 echo "master"
356 cd "$GIT_DIR/$remote_top" &&
357 find . -type f -print | sed -e 's/^\.\///'
358 ) | (
359 done=f
360 while read name
361 do
362 test t = $done && continue
363 branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
364 if test "$head_sha1" = "$branch_tip"
365 then
366 echo "$name"
367 done=t
368 fi
369 done
370 )
371 )
372 # Write out remotes/$origin file, and update our "$head_points_at".
374 case "$head_points_at" in
375 ?*)
376 mkdir -p "$GIT_DIR/remotes" &&
377 git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
378 case "$use_separate_remote" in
379 t) origin_track="$remote_top/$head_points_at"
380 git-update-ref HEAD "$head_sha1" ;;
381 *) origin_track="$remote_top/$origin"
382 git-update-ref "refs/heads/$origin" "$head_sha1" ;;
383 esac &&
384 echo >"$GIT_DIR/remotes/$origin" \
385 "URL: $repo
386Pull: refs/heads/$head_points_at:$origin_track" &&
387 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
388 while read dotslref
389 do
390 name=`expr "$dotslref" : './\(.*\)'`
391 if test "z$head_points_at" = "z$name"
392 then
393 continue
394 fi
395 if test "$use_separate_remote" = '' &&
396 test "z$origin" = "z$name"
397 then
398 continue
399 fi
400 echo "Pull: refs/heads/${name}:$remote_top/${name}"
401 done >>"$GIT_DIR/remotes/$origin" &&
402 case "$use_separate_remote" in
403 t)
404 rm -f "refs/remotes/$origin/HEAD"
405 git-symbolic-ref "refs/remotes/$origin/HEAD" \
406 "refs/remotes/$origin/$head_points_at"
407 esac
408 esac
409 case "$no_checkout" in
411 '')
412 git-read-tree -m -u -v HEAD HEAD
413 esac
414fi
415rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
416trap - 0
418