revision: simplify argument parsing.
[alt-git.git] / git-clone.sh
blob823c74b9139d4a77eb5430674bf0237fb573c14c
1 #!/bin/sh
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.
8 # See git-sh-setup why.
9 unset CDPATH
11 usage() {
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
16 get_repo_base() {
17 (cd "$1" && (cd .git ; pwd)) 2> /dev/null
20 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
21 curl_extra_args="-k"
24 http_fetch () {
25 # $1 = Remote, $2 = Local
26 curl -nsfL $curl_extra_args "$1" >"$2"
29 clone_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.
36 Perhaps git-update-server-info needs to be run there?"
37 exit 1;
39 while read sha1 refname
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=$name
52 git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
53 done <"$clone_tmp/refs"
54 rm -fr "$clone_tmp"
55 http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD"
58 # Read git-fetch-pack -k output and store the remote branches.
59 copy_refs='
60 use File::Path qw(mkpath);
61 use File::Basename qw(dirname);
62 my $git_dir = $ARGV[0];
63 my $use_separate_remote = $ARGV[1];
64 my $origin = $ARGV[2];
66 my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
67 my $tag_top = "tags";
69 sub store {
70 my ($sha1, $name, $top) = @_;
71 $name = "$git_dir/refs/$top/$name";
72 mkpath(dirname($name));
73 open O, ">", "$name";
74 print O "$sha1\n";
75 close O;
78 open FH, "<", "$git_dir/CLONE_HEAD";
79 while (<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;
88 if ($name =~ s/^refs\/heads\///) {
89 store($sha1, $name, $branch_top);
90 next;
92 if ($name =~ s/^refs\/tags\///) {
93 store($sha1, $name, $tag_top);
94 next;
97 close FH;
100 quiet=
101 local=no
102 use_local=no
103 local_shared=no
104 no_checkout=
105 upload_pack=
106 bare=
107 reference=
108 origin=
109 origin_override=
110 use_separate_remote=
111 while
112 case "$#,$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
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 "'$2' is not suitable for a branch name"
140 exit 1
142 test -z "$origin_override" || {
143 echo >&2 "Do not give more than one --origin options."
144 exit 1
146 origin_override=yes
147 origin="$2"; shift
149 1,-u|1,--upload-pack) usage ;;
150 *,-u|*,--upload-pack)
151 shift
152 upload_pack="--exec=$1" ;;
153 *,-*) usage ;;
154 *) break ;;
155 esac
157 shift
158 done
160 repo="$1"
161 if test -z "$repo"
162 then
163 echo >&2 'you must specify a repository to clone.'
164 exit 1
167 # --bare implies --no-checkout
168 if test yes = "$bare"
169 then
170 if test yes = "$origin_override"
171 then
172 echo >&2 '--bare and --origin $origin options are incompatible.'
173 exit 1
175 if test t = "$use_separate_remote"
176 then
177 echo >&2 '--bare and --use-separate-remote options are incompatible.'
178 exit 1
180 no_checkout=yes
183 if test -z "$origin"
184 then
185 origin=origin
188 # Turn the source into an absolute path if
189 # it is local
190 if base=$(get_repo_base "$repo"); then
191 repo="$base"
192 local=yes
195 dir="$2"
196 # Try using "humanish" part of source repo if user didn't specify one
197 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
198 [ -e "$dir" ] && echo "$dir already exists." && usage
199 mkdir -p "$dir" &&
200 D=$(cd "$dir" && pwd) &&
201 trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
202 case "$bare" in
203 yes) GIT_DIR="$D" ;;
204 *) GIT_DIR="$D/.git" ;;
205 esac && export GIT_DIR && git-init-db || usage
206 case "$bare" in
207 yes)
208 GIT_DIR="$D" ;;
210 GIT_DIR="$D/.git" ;;
211 esac
213 if test -n "$reference"
214 then
215 if test -d "$reference"
216 then
217 if test -d "$reference/.git/objects"
218 then
219 reference="$reference/.git"
221 reference=$(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
233 rm -f "$GIT_DIR/CLONE_HEAD"
235 # We do local magic only when the user tells us to.
236 case "$local,$use_local" in
237 yes,yes)
238 ( cd "$repo/objects" ) || {
239 echo >&2 "-l flag seen but $repo is not local."
240 exit 1
243 case "$local_shared" in
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)
249 # objects directory should not be empty since we are cloning!
250 test -f "$repo/$sample_file" || exit
253 if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
254 then
256 fi &&
257 rm -f "$GIT_DIR/objects/sample" &&
258 cd "$repo" &&
259 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
261 yes)
262 mkdir -p "$GIT_DIR/objects/info"
264 test -f "$repo/objects/info/alternates" &&
265 cat "$repo/objects/info/alternates";
266 echo "$repo/objects"
267 } >"$GIT_DIR/objects/info/alternates"
269 esac
270 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
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
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"
300 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
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
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 '$repo' failed."
317 exit 1
320 esac
322 esac
323 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
325 if test -f "$GIT_DIR/CLONE_HEAD"
326 then
327 # Figure out where the remote HEAD points at.
328 perl -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin"
331 cd "$D" || exit
333 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
334 then
335 head_sha1=`cat "$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
342 # 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"
350 # The name under $remote_top the remote HEAD seems to point at
351 head_points_at=$(
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
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 "$name"
365 done=t
367 done
371 # Write out remotes/$origin file.
372 case "$head_points_at" in
374 mkdir -p "$GIT_DIR/remotes" &&
375 echo >"$GIT_DIR/remotes/$origin" \
376 "URL: $repo
377 Pull: refs/heads/$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/$remote_top" && find . -type f -print) |
383 while read dotslref
385 name=`expr "$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
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
398 case "$no_checkout" in
400 git-read-tree -m -u -v HEAD HEAD
401 esac
403 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
405 trap - exit