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