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>] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [--depth <n>] [-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-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 "$GIT_DIR/REMOTE_HEAD"
67}
68quiet=
70local=no
71use_local=no
72local_shared=no
73unset template
74no_checkout=
75upload_pack=
76bare=
77reference=
78origin=
79origin_override=
80use_separate_remote=t
81depth=
82while
83 case "$#,$1" in
84 0,*) break ;;
85 *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
86 *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
87 no_checkout=yes ;;
88 *,--na|*,--nak|*,--nake|*,--naked|\
89 *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
90 *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
91 *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
92 local_shared=yes; use_local=yes ;;
93 1,--template) usage ;;
94 *,--template)
95 shift; template="--template=$1" ;;
96 *,--template=*)
97 template="$1" ;;
98 *,-q|*,--quiet) quiet=-q ;;
99 *,--use-separate-remote) ;;
100 *,--no-separate-remote)
101 die "clones are always made with separate-remote layout" ;;
102 1,--reference) usage ;;
103 *,--reference)
104 shift; reference="$1" ;;
105 *,--reference=*)
106 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
107 *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
108 case "$2" in
109 '')
110 usage ;;
111 */*)
112 die "'$2' is not suitable for an origin name"
113 esac
114 git-check-ref-format "heads/$2" ||
115 die "'$2' is not suitable for a branch name"
116 test -z "$origin_override" ||
117 die "Do not give more than one --origin options."
118 origin_override=yes
119 origin="$2"; shift
120 ;;
121 1,-u|1,--upload-pack) usage ;;
122 *,-u|*,--upload-pack)
123 shift
124 upload_pack="--upload-pack=$1" ;;
125 *,--upload-pack=*)
126 upload_pack=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
127 1,--depth) usage;;
128 *,--depth)
129 shift
130 depth="--depth=$1";;
131 *,-*) usage ;;
132 *) break ;;
133 esac
134do
135 shift
136done
137repo="$1"
139test -n "$repo" ||
140 die 'you must specify a repository to clone.'
141# --bare implies --no-checkout and --no-separate-remote
143if test yes = "$bare"
144then
145 if test yes = "$origin_override"
146 then
147 die '--bare and --origin $origin options are incompatible.'
148 fi
149 no_checkout=yes
150 use_separate_remote=
151fi
152if test -z "$origin"
154then
155 origin=origin
156fi
157# Turn the source into an absolute path if
159# it is local
160if base=$(get_repo_base "$repo"); then
161 repo="$base"
162 local=yes
163fi
164dir="$2"
166# Try using "humanish" part of source repo if user didn't specify one
167[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
168[ -e "$dir" ] && die "destination directory '$dir' already exists."
169mkdir -p "$dir" &&
170D=$(cd "$dir" && pwd) &&
171trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
172case "$bare" in
173yes)
174 GIT_DIR="$D" ;;
175*)
176 GIT_DIR="$D/.git" ;;
177esac && export GIT_DIR && git-init ${template+"$template"} || usage
178if test -n "$reference"
180then
181 if test -d "$reference"
182 then
183 if test -d "$reference/.git/objects"
184 then
185 reference="$reference/.git"
186 fi
187 reference=$(cd "$reference" && pwd)
188 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
189 (cd "$reference" && tar cf - refs) |
190 (cd "$GIT_DIR/refs" &&
191 mkdir reference-tmp &&
192 cd reference-tmp &&
193 tar xf - &&
194 find refs ! -type d -print |
195 while read ref
196 do
197 if test -h "$ref"
198 then
199 # Old-style symbolic link ref. Not likely
200 # to appear under refs/ but we might as well
201 # deal with them.
202 :
203 elif test -f "$ref"
204 then
205 point=$(cat "$ref") &&
206 case "$point" in
207 'ref: '*) ;;
208 *) continue ;;
209 esac
210 fi
211 # The above makes true ref to 'continue' and
212 # we will come here when we are looking at
213 # symbolic link ref or a textual symref (or
214 # garbage, like fifo).
215 # The true ref pointed at by it is enough to
216 # ensure that we do not fetch objects reachable
217 # from it.
218 rm -f "$ref"
219 done
220 )
221 else
222 die "reference repository '$reference' is not a local directory."
223 fi
224fi
225rm -f "$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 "$repo/objects" ) ||
232 die "-l flag seen but repository '$repo' is not local."
233 case "$local_shared" in
235 no)
236 # See if we can hardlink and drop "l" if not.
237 sample_file=$(cd "$repo" && \
238 find objects -type f -print | sed -e 1q)
239 # objects directory should not be empty since we are cloning!
241 test -f "$repo/$sample_file" || exit
242 l=
244 if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
245 then
246 l=l
247 fi &&
248 rm -f "$GIT_DIR/objects/sample" &&
249 cd "$repo" &&
250 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
251 ;;
252 yes)
253 mkdir -p "$GIT_DIR/objects/info"
254 echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
255 ;;
256 esac
257 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
258 ;;
259*)
260 case "$repo" in
261 rsync://*)
262 case "$depth" in
263 "") ;;
264 *) die "shallow over rsync not supported" ;;
265 esac
266 rsync $quiet -av --ignore-existing \
267 --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
268 exit
269 # Look at objects/info/alternates for rsync -- http will
270 # support it natively and git native ones will do it on the
271 # remote end. Not having that file is not a crime.
272 rsync -q "$repo/objects/info/alternates" \
273 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
274 rm -f "$GIT_DIR/TMP_ALT"
275 if test -f "$GIT_DIR/TMP_ALT"
276 then
277 ( cd "$D" &&
278 . git-parse-remote &&
279 resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
280 while read alt
281 do
282 case "$alt" in 'bad alternate: '*) die "$alt";; esac
283 case "$quiet" in
284 '') echo >&2 "Getting alternate: $alt" ;;
285 esac
286 rsync $quiet -av --ignore-existing \
287 --exclude info "$alt" "$GIT_DIR/objects" || exit
288 done
289 rm -f "$GIT_DIR/TMP_ALT"
290 fi
291 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
292 ;;
293 https://*|http://*|ftp://*)
294 case "$depth" in
295 "") ;;
296 *) die "shallow over http or ftp not supported" ;;
297 esac
298 if test -z "@@NO_CURL@@"
299 then
300 clone_dumb_http "$repo" "$D"
301 else
302 die "http transport not supported, rebuild Git with curl support"
303 fi
304 ;;
305 *)
306 case "$upload_pack" in
307 '') git-fetch-pack --all -k $quiet $depth "$repo" ;;
308 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth "$repo" ;;
309 esac >"$GIT_DIR/CLONE_HEAD" ||
310 die "fetch-pack from '$repo' failed."
311 ;;
312 esac
313 ;;
314esac
315test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
316if test -f "$GIT_DIR/CLONE_HEAD"
318then
319 # Read git-fetch-pack -k output and store the remote branches.
320 if [ -n "$use_separate_remote" ]
321 then
322 branch_top="remotes/$origin"
323 else
324 branch_top="heads"
325 fi
326 tag_top="tags"
327 while read sha1 name
328 do
329 case "$name" in
330 *'^{}')
331 continue ;;
332 HEAD)
333 destname="REMOTE_HEAD" ;;
334 refs/heads/*)
335 destname="refs/$branch_top/${name#refs/heads/}" ;;
336 refs/tags/*)
337 destname="refs/$tag_top/${name#refs/tags/}" ;;
338 *)
339 continue ;;
340 esac
341 git-update-ref -m "clone: from $repo" "$destname" "$sha1" ""
342 done < "$GIT_DIR/CLONE_HEAD"
343fi
344cd "$D" || exit
346if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
348then
349 # a non-bare repository is always in separate-remote layout
350 remote_top="refs/remotes/$origin"
351 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
352 case "$head_sha1" in
353 'ref: refs/'*)
354 # Uh-oh, the remote told us (http transport done against
355 # new style repository with a symref HEAD).
356 # Ideally we should skip the guesswork but for now
357 # opt for minimum change.
358 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
359 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
360 ;;
361 esac
362 # The name under $remote_top the remote HEAD seems to point at.
364 head_points_at=$(
365 (
366 test -f "$GIT_DIR/$remote_top/master" && echo "master"
367 cd "$GIT_DIR/$remote_top" &&
368 find . -type f -print | sed -e 's/^\.\///'
369 ) | (
370 done=f
371 while read name
372 do
373 test t = $done && continue
374 branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
375 if test "$head_sha1" = "$branch_tip"
376 then
377 echo "$name"
378 done=t
379 fi
380 done
381 )
382 )
383 # Write out remote.$origin config, and update our "$head_points_at".
385 case "$head_points_at" in
386 ?*)
387 # Local default branch
388 git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
389 # Tracking branch for the primary branch at the remote.
391 origin_track="$remote_top/$head_points_at" &&
392 git-update-ref HEAD "$head_sha1" &&
393 # Upstream URL
395 git-config remote."$origin".url "$repo" &&
396 # Set up the mappings to track the remote branches.
398 git-config remote."$origin".fetch \
399 "+refs/heads/*:$remote_top/*" '^$' &&
400 rm -f "refs/remotes/$origin/HEAD"
401 git-symbolic-ref "refs/remotes/$origin/HEAD" \
402 "refs/remotes/$origin/$head_points_at" &&
403 git-config branch."$head_points_at".remote "$origin" &&
405 git-config branch."$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