verify-pack -v: show delta-chain histogram.
[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 usage() {
12         echo >&2 "Usage: $0 [--bare] [-l [-s]] [-q] [-u <upload-pack>] [-o <name>] [-n] <repo> [<dir>]"
13         exit 1
14 }
15
16 get_repo_base() {
17         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
18 }
19
20 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
21     curl_extra_args="-k"
22 fi
23
24 http_fetch () {
25         # $1 = Remote, $2 = Local
26         curl -nsfL $curl_extra_args "$1" >"$2"
27 }
28
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;
38         }
39         while read sha1 refname
40         do
41                 name=`expr "$refname" : 'refs/\(.*\)'` &&
42                 case "$name" in
43                 *^*)    ;;
44                 *)
45                         git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
46                 esac
47         done <"$clone_tmp/refs"
48         rm -fr "$clone_tmp"
49 }
50
51 quiet=
52 use_local=no
53 local_shared=no
54 no_checkout=
55 upload_pack=
56 bare=
57 origin=origin
58 origin_override=
59 while
60         case "$#,$1" in
61         0,*) break ;;
62         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
63         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
64           no_checkout=yes ;;
65         *,--na|*,--nak|*,--nake|*,--naked|\
66         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
67         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
68         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared) 
69           local_shared=yes; use_local=yes ;;
70         *,-q|*,--quiet) quiet=-q ;;
71         1,-o) usage;;
72         *,-o)
73                 git-check-ref-format "$2" || {
74                     echo >&2 "'$2' is not suitable for a branch name"
75                     exit 1
76                 }
77                 test -z "$origin_override" || {
78                     echo >&2 "Do not give more than one -o options."
79                     exit 1
80                 }
81                 origin_override=yes
82                 origin="$2"; shift
83                 ;;
84         1,-u|1,--upload-pack) usage ;;
85         *,-u|*,--upload-pack)
86                 shift
87                 upload_pack="--exec=$1" ;;
88         *,-*) usage ;;
89         *) break ;;
90         esac
91 do
92         shift
93 done
94
95 # --bare implies --no-checkout
96 if test yes = "$bare"
97 then
98         if test yes = "$origin_override"
99         then
100                 echo >&2 '--bare and -o $origin options are incompatible.'
101                 exit 1
102         fi
103         no_checkout=yes
104 fi
105
106 # Turn the source into an absolute path if
107 # it is local
108 repo="$1"
109 local=no
110 if base=$(get_repo_base "$repo"); then
111         repo="$base"
112         local=yes
113 fi
114
115 dir="$2"
116 # Try using "humanish" part of source repo if user didn't specify one
117 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
118 [ -e "$dir" ] && echo "$dir already exists." && usage
119 mkdir -p "$dir" &&
120 D=$(cd "$dir" && pwd) &&
121 trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
122 case "$bare" in
123 yes) GIT_DIR="$D" ;;
124 *) GIT_DIR="$D/.git" ;;
125 esac && export GIT_DIR && git-init-db || usage
126 case "$bare" in
127 yes)
128         GIT_DIR="$D" ;;
129 *)
130         GIT_DIR="$D/.git" ;;
131 esac
132
133 # We do local magic only when the user tells us to.
134 case "$local,$use_local" in
135 yes,yes)
136         ( cd "$repo/objects" ) || {
137                 echo >&2 "-l flag seen but $repo is not local."
138                 exit 1
139         }
140
141         case "$local_shared" in
142         no)
143             # See if we can hardlink and drop "l" if not.
144             sample_file=$(cd "$repo" && \
145                           find objects -type f -print | sed -e 1q)
146
147             # objects directory should not be empty since we are cloning!
148             test -f "$repo/$sample_file" || exit
149
150             l=
151             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
152             then
153                     l=l
154             fi &&
155             rm -f "$GIT_DIR/objects/sample" &&
156             cd "$repo" &&
157             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
158             ;;
159         yes)
160             mkdir -p "$GIT_DIR/objects/info"
161             {
162                 test -f "$repo/objects/info/alternates" &&
163                 cat "$repo/objects/info/alternates";
164                 echo "$repo/objects"
165             } >"$GIT_DIR/objects/info/alternates"
166             ;;
167         esac
168
169         # Make a duplicate of refs and HEAD pointer
170         HEAD=
171         if test -f "$repo/HEAD"
172         then
173                 HEAD=HEAD
174         fi
175         (cd "$repo" && tar cf - refs $HEAD) |
176         (cd "$GIT_DIR" && tar xf -) || exit 1
177         ;;
178 *)
179         case "$repo" in
180         rsync://*)
181                 rsync $quiet -av --ignore-existing  \
182                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" &&
183                 rsync $quiet -av --ignore-existing  \
184                         --exclude info "$repo/refs/" "$GIT_DIR/refs/" || exit
185
186                 # Look at objects/info/alternates for rsync -- http will
187                 # support it natively and git native ones will do it on the
188                 # remote end.  Not having that file is not a crime.
189                 rsync -q "$repo/objects/info/alternates" \
190                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
191                         rm -f "$GIT_DIR/TMP_ALT"
192                 if test -f "$GIT_DIR/TMP_ALT"
193                 then
194                     ( cd "$D" &&
195                       . git-parse-remote &&
196                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
197                     while read alt
198                     do
199                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
200                         case "$quiet" in
201                         '')     echo >&2 "Getting alternate: $alt" ;;
202                         esac
203                         rsync $quiet -av --ignore-existing  \
204                             --exclude info "$alt" "$GIT_DIR/objects" || exit
205                     done
206                     rm -f "$GIT_DIR/TMP_ALT"
207                 fi
208                 ;;
209         http://*)
210                 if test -z "@@NO_CURL@@"
211                 then
212                         clone_dumb_http "$repo" "$D"
213                 else
214                         echo >&2 "http transport not supported, rebuild Git with curl support"
215                         exit 1
216                 fi
217                 ;;
218         *)
219                 cd "$D" && case "$upload_pack" in
220                 '') git-clone-pack $quiet "$repo" ;;
221                 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
222                 esac || {
223                         echo >&2 "clone-pack from '$repo' failed."
224                         exit 1
225                 }
226                 ;;
227         esac
228         ;;
229 esac
230
231 cd "$D" || exit
232
233 if test -f "$GIT_DIR/HEAD" && test -z "$bare"
234 then
235         head_points_at=`git-symbolic-ref HEAD`
236         case "$head_points_at" in
237         refs/heads/*)
238                 head_points_at=`expr "$head_points_at" : 'refs/heads/\(.*\)'`
239                 mkdir -p "$GIT_DIR/remotes" &&
240                 echo >"$GIT_DIR/remotes/origin" \
241                 "URL: $repo
242 Pull: $head_points_at:$origin" &&
243                 git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) &&
244                 (cd "$GIT_DIR" && find "refs/heads" -type f -print) |
245                 while read ref
246                 do
247                         head=`expr "$ref" : 'refs/heads/\(.*\)'` &&
248                         test "$head_points_at" = "$head" ||
249                         test "$origin" = "$head" ||
250                         echo "Pull: ${head}:${head}"
251                 done >>"$GIT_DIR/remotes/origin"
252         esac
253
254         case "$no_checkout" in
255         '')
256                 git-read-tree -m -u -v HEAD HEAD
257         esac
258 fi
259
260 trap - exit
261