git clone: do not issue warning while cloning locally across filesystems
[git/git.git] / git-clone.sh
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
8 # See git-sh-setup why.
9 unset CDPATH
10
11 die() {
12 echo >&2 "$@"
13 exit 1
14 }
15
16 usage() {
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 }
19
20 get_repo_base() {
21 (
22 cd "`/bin/pwd`" &&
23 cd "$1" || cd "$1.git" &&
24 {
25 cd .git
26 pwd
27 }
28 ) 2>/dev/null
29 }
30
31 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
32 curl_extra_args="-k"
33 fi
34
35 http_fetch () {
36 # $1 = Remote, $2 = Local
37 curl -nsfL $curl_extra_args "$1" >"$2"
38 }
39
40 clone_dumb_http () {
41 # $1 - remote, $2 - local
42 cd "$2" &&
43 clone_tmp="$GIT_DIR/clone-tmp" &&
44 mkdir -p "$clone_tmp" || exit 1
45 if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
46 "`git config --bool http.noEPSV`" = true ]; then
47 curl_extra_args="${curl_extra_args} --disable-epsv"
48 fi
49 http_fetch "$1/info/refs" "$clone_tmp/refs" ||
50 die "Cannot get remote repository information.
51 Perhaps git-update-server-info needs to be run there?"
52 test "z$quiet" = z && v=-v || v=
53 while read sha1 refname
54 do
55 name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
56 case "$name" in
57 *^*) continue;;
58 esac
59 case "$bare,$name" in
60 yes,* | ,heads/* | ,tags/*) ;;
61 *) continue ;;
62 esac
63 if test -n "$use_separate_remote" &&
64 branch_name=`expr "z$name" : 'zheads/\(.*\)'`
65 then
66 tname="remotes/$origin/$branch_name"
67 else
68 tname=$name
69 fi
70 git-http-fetch $v -a -w "$tname" "$sha1" "$1" || exit 1
71 done <"$clone_tmp/refs"
72 rm -fr "$clone_tmp"
73 http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
74 rm -f "$GIT_DIR/REMOTE_HEAD"
75 if test -f "$GIT_DIR/REMOTE_HEAD"; then
76 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
77 case "$head_sha1" in
78 'ref: refs/'*)
79 ;;
80 *)
81 git-http-fetch $v -a "$head_sha1" "$1" ||
82 rm -f "$GIT_DIR/REMOTE_HEAD"
83 ;;
84 esac
85 fi
86 }
87
88 quiet=
89 local=no
90 use_local_hardlink=yes
91 local_shared=no
92 unset template
93 no_checkout=
94 upload_pack=
95 bare=
96 reference=
97 origin=
98 origin_override=
99 use_separate_remote=t
100 depth=
101 no_progress=
102 local_explicitly_asked_for=
103 test -t 1 || no_progress=--no-progress
104 while
105 case "$#,$1" in
106 0,*) break ;;
107 *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
108 *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
109 no_checkout=yes ;;
110 *,--na|*,--nak|*,--nake|*,--naked|\
111 *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
112 *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local)
113 local_explicitly_asked_for=yes
114 use_local_hardlink=yes ;;
115 *,--no-h|*,--no-ha|*,--no-har|*,--no-hard|*,--no-hardl|\
116 *,--no-hardli|*,--no-hardlin|*,--no-hardlink|*,--no-hardlinks)
117 use_local_hardlink=no ;;
118 *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
119 local_shared=yes; ;;
120 1,--template) usage ;;
121 *,--template)
122 shift; template="--template=$1" ;;
123 *,--template=*)
124 template="$1" ;;
125 *,-q|*,--quiet) quiet=-q ;;
126 *,--use-separate-remote) ;;
127 *,--no-separate-remote)
128 die "clones are always made with separate-remote layout" ;;
129 1,--reference) usage ;;
130 *,--reference)
131 shift; reference="$1" ;;
132 *,--reference=*)
133 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
134 *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
135 case "$2" in
136 '')
137 usage ;;
138 */*)
139 die "'$2' is not suitable for an origin name"
140 esac
141 git check-ref-format "heads/$2" ||
142 die "'$2' is not suitable for a branch name"
143 test -z "$origin_override" ||
144 die "Do not give more than one --origin options."
145 origin_override=yes
146 origin="$2"; shift
147 ;;
148 1,-u|1,--upload-pack) usage ;;
149 *,-u|*,--upload-pack)
150 shift
151 upload_pack="--upload-pack=$1" ;;
152 *,--upload-pack=*)
153 upload_pack=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
154 1,--depth) usage;;
155 *,--depth)
156 shift
157 depth="--depth=$1";;
158 *,-*) usage ;;
159 *) break ;;
160 esac
161 do
162 shift
163 done
164
165 repo="$1"
166 test -n "$repo" ||
167 die 'you must specify a repository to clone.'
168
169 # --bare implies --no-checkout and --no-separate-remote
170 if test yes = "$bare"
171 then
172 if test yes = "$origin_override"
173 then
174 die '--bare and --origin $origin options are incompatible.'
175 fi
176 no_checkout=yes
177 use_separate_remote=
178 fi
179
180 if test -z "$origin"
181 then
182 origin=origin
183 fi
184
185 # Turn the source into an absolute path if
186 # it is local
187 if base=$(get_repo_base "$repo"); then
188 repo="$base"
189 local=yes
190 fi
191
192 dir="$2"
193 # Try using "humanish" part of source repo if user didn't specify one
194 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
195 [ -e "$dir" ] && die "destination directory '$dir' already exists."
196 [ yes = "$bare" ] && unset GIT_WORK_TREE
197 [ -n "$GIT_WORK_TREE" ] && [ -e "$GIT_WORK_TREE" ] &&
198 die "working tree '$GIT_WORK_TREE' already exists."
199 D=
200 W=
201 cleanup() {
202 err=$?
203 test -z "$D" && rm -rf "$dir"
204 test -z "$W" && test -n "$GIT_WORK_TREE" && rm -rf "$GIT_WORK_TREE"
205 cd ..
206 test -n "$D" && rm -rf "$D"
207 test -n "$W" && rm -rf "$W"
208 exit $err
209 }
210 trap cleanup 0
211 mkdir -p "$dir" && D=$(cd "$dir" && pwd) || usage
212 test -n "$GIT_WORK_TREE" && mkdir -p "$GIT_WORK_TREE" &&
213 W=$(cd "$GIT_WORK_TREE" && pwd) && export GIT_WORK_TREE="$W"
214 if test yes = "$bare" || test -n "$GIT_WORK_TREE"; then
215 GIT_DIR="$D"
216 else
217 GIT_DIR="$D/.git"
218 fi &&
219 export GIT_DIR &&
220 GIT_CONFIG="$GIT_DIR/config" git-init $quiet ${template+"$template"} || usage
221
222 if test -n "$bare"
223 then
224 GIT_CONFIG="$GIT_DIR/config" git config core.bare true
225 fi
226
227 if test -n "$reference"
228 then
229 ref_git=
230 if test -d "$reference"
231 then
232 if test -d "$reference/.git/objects"
233 then
234 ref_git="$reference/.git"
235 elif test -d "$reference/objects"
236 then
237 ref_git="$reference"
238 fi
239 fi
240 if test -n "$ref_git"
241 then
242 ref_git=$(cd "$ref_git" && pwd)
243 echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
244 (
245 GIT_DIR="$ref_git" git for-each-ref \
246 --format='%(objectname) %(*objectname)'
247 ) |
248 while read a b
249 do
250 test -z "$a" ||
251 git update-ref "refs/reference-tmp/$a" "$a"
252 test -z "$b" ||
253 git update-ref "refs/reference-tmp/$b" "$b"
254 done
255 else
256 die "reference repository '$reference' is not a local directory."
257 fi
258 fi
259
260 rm -f "$GIT_DIR/CLONE_HEAD"
261
262 # We do local magic only when the user tells us to.
263 case "$local" in
264 yes)
265 ( cd "$repo/objects" ) ||
266 die "cannot chdir to local '$repo/objects'."
267
268 if test "$local_shared" = yes
269 then
270 mkdir -p "$GIT_DIR/objects/info"
271 echo "$repo/objects" >>"$GIT_DIR/objects/info/alternates"
272 else
273 l= &&
274 if test "$use_local_hardlink" = yes
275 then
276 # See if we can hardlink and drop "l" if not.
277 sample_file=$(cd "$repo" && \
278 find objects -type f -print | sed -e 1q)
279 # objects directory should not be empty because
280 # we are cloning!
281 test -f "$repo/$sample_file" || exit
282 if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
283 then
284 rm -f "$GIT_DIR/objects/sample"
285 l=l
286 elif test -n "$local_explicitly_asked_for"
287 then
288 echo >&2 "Warning: -l asked but cannot hardlink to $repo"
289 fi
290 fi &&
291 cd "$repo" &&
292 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
293 fi
294 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
295 ;;
296 *)
297 case "$repo" in
298 rsync://*)
299 case "$depth" in
300 "") ;;
301 *) die "shallow over rsync not supported" ;;
302 esac
303 rsync $quiet -av --ignore-existing \
304 --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
305 exit
306 # Look at objects/info/alternates for rsync -- http will
307 # support it natively and git native ones will do it on the
308 # remote end. Not having that file is not a crime.
309 rsync -q "$repo/objects/info/alternates" \
310 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
311 rm -f "$GIT_DIR/TMP_ALT"
312 if test -f "$GIT_DIR/TMP_ALT"
313 then
314 ( cd "$D" &&
315 . git-parse-remote &&
316 resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
317 while read alt
318 do
319 case "$alt" in 'bad alternate: '*) die "$alt";; esac
320 case "$quiet" in
321 '') echo >&2 "Getting alternate: $alt" ;;
322 esac
323 rsync $quiet -av --ignore-existing \
324 --exclude info "$alt" "$GIT_DIR/objects" || exit
325 done
326 rm -f "$GIT_DIR/TMP_ALT"
327 fi
328 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
329 ;;
330 https://*|http://*|ftp://*)
331 case "$depth" in
332 "") ;;
333 *) die "shallow over http or ftp not supported" ;;
334 esac
335 if test -z "@@NO_CURL@@"
336 then
337 clone_dumb_http "$repo" "$D"
338 else
339 die "http transport not supported, rebuild Git with curl support"
340 fi
341 ;;
342 *)
343 case "$upload_pack" in
344 '') git-fetch-pack --all -k $quiet $depth $no_progress "$repo";;
345 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth $no_progress "$repo" ;;
346 esac >"$GIT_DIR/CLONE_HEAD" ||
347 die "fetch-pack from '$repo' failed."
348 ;;
349 esac
350 ;;
351 esac
352 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
353
354 if test -f "$GIT_DIR/CLONE_HEAD"
355 then
356 # Read git-fetch-pack -k output and store the remote branches.
357 if [ -n "$use_separate_remote" ]
358 then
359 branch_top="remotes/$origin"
360 else
361 branch_top="heads"
362 fi
363 tag_top="tags"
364 while read sha1 name
365 do
366 case "$name" in
367 *'^{}')
368 continue ;;
369 HEAD)
370 destname="REMOTE_HEAD" ;;
371 refs/heads/*)
372 destname="refs/$branch_top/${name#refs/heads/}" ;;
373 refs/tags/*)
374 destname="refs/$tag_top/${name#refs/tags/}" ;;
375 *)
376 continue ;;
377 esac
378 git update-ref -m "clone: from $repo" "$destname" "$sha1" ""
379 done < "$GIT_DIR/CLONE_HEAD"
380 fi
381
382 if test -n "$W"; then
383 cd "$W" || exit
384 else
385 cd "$D" || exit
386 fi
387
388 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
389 then
390 # a non-bare repository is always in separate-remote layout
391 remote_top="refs/remotes/$origin"
392 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
393 case "$head_sha1" in
394 'ref: refs/'*)
395 # Uh-oh, the remote told us (http transport done against
396 # new style repository with a symref HEAD).
397 # Ideally we should skip the guesswork but for now
398 # opt for minimum change.
399 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
400 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
401 ;;
402 esac
403
404 # The name under $remote_top the remote HEAD seems to point at.
405 head_points_at=$(
406 (
407 test -f "$GIT_DIR/$remote_top/master" && echo "master"
408 cd "$GIT_DIR/$remote_top" &&
409 find . -type f -print | sed -e 's/^\.\///'
410 ) | (
411 done=f
412 while read name
413 do
414 test t = $done && continue
415 branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
416 if test "$head_sha1" = "$branch_tip"
417 then
418 echo "$name"
419 done=t
420 fi
421 done
422 )
423 )
424
425 # Upstream URL
426 git config remote."$origin".url "$repo" &&
427
428 # Set up the mappings to track the remote branches.
429 git config remote."$origin".fetch \
430 "+refs/heads/*:$remote_top/*" '^$' &&
431
432 # Write out remote.$origin config, and update our "$head_points_at".
433 case "$head_points_at" in
434 ?*)
435 # Local default branch
436 git symbolic-ref HEAD "refs/heads/$head_points_at" &&
437
438 # Tracking branch for the primary branch at the remote.
439 git update-ref HEAD "$head_sha1" &&
440
441 rm -f "refs/remotes/$origin/HEAD"
442 git symbolic-ref "refs/remotes/$origin/HEAD" \
443 "refs/remotes/$origin/$head_points_at" &&
444
445 git config branch."$head_points_at".remote "$origin" &&
446 git config branch."$head_points_at".merge "refs/heads/$head_points_at"
447 ;;
448 '')
449 # Source had detached HEAD pointing nowhere
450 git update-ref --no-deref HEAD "$head_sha1" &&
451 rm -f "refs/remotes/$origin/HEAD"
452 ;;
453 esac
454
455 case "$no_checkout" in
456 '')
457 test "z$quiet" = z -a "z$no_progress" = z && v=-v || v=
458 git read-tree -m -u $v HEAD HEAD
459 esac
460 fi
461 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
462
463 trap - 0