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 [-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         http_fetch "$1/objects/info/packs" "$clone_tmp/packs" || {
  36                 echo >&2 "Cannot get remote repository information.
  37 Perhaps git-update-server-info needs to be run there?"
  38                 exit 1;
  39         }
  40         while read type name
  41         do
  42                 case "$type" in
  43                 P) ;;
  44                 *) continue ;;
  45                 esac &&
  46
  47                 idx=`expr "$name" : '\(.*\)\.pack'`.idx
  48                 http_fetch "$1/objects/pack/$name" ".git/objects/pack/$name" &&
  49                 http_fetch "$1/objects/pack/$idx" ".git/objects/pack/$idx" &&
  50                 git-verify-pack ".git/objects/pack/$idx" || exit 1
  51         done <"$clone_tmp/packs"
  52
  53         while read sha1 refname
  54         do
  55                 name=`expr "$refname" : 'refs/\(.*\)'` &&
  56                 case "$name" in
  57                 *^*)    ;;
  58                 *)
  59                         git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
  60                 esac
  61         done <"$clone_tmp/refs"
  62         rm -fr "$clone_tmp"
  63 }
  64
  65 quiet=
  66 use_local=no
  67 local_shared=no
  68 no_checkout=
  69 upload_pack=
  70 origin=origin
  71 while
  72         case "$#,$1" in
  73         0,*) break ;;
  74         *,-n) no_checkout=yes ;;
  75         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  76         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  77           local_shared=yes; use_local=yes ;;
  78         *,-q|*,--quiet) quiet=-q ;;
  79         1,-o) usage;;
  80         *,-o)
  81                 git-check-ref-format "$2" || {
  82                     echo >&2 "'$2' is not suitable for a branch name"
  83                     exit 1
  84                 }
  85                 origin="$2"; shift
  86                 ;;
  87         1,-u|1,--upload-pack) usage ;;
  88         *,-u|*,--upload-pack)
  89                 shift
  90                 upload_pack="--exec=$1" ;;
  91         *,-*) usage ;;
  92         *) break ;;
  93         esac
  94 do
  95         shift
  96 done
  97
  98 # Turn the source into an absolute path if
  99 # it is local
 100 repo="$1"
 101 local=no
 102 if base=$(get_repo_base "$repo"); then
 103         repo="$base"
 104         local=yes
 105 fi
 106
 107 dir="$2"
 108 # Try using "humanish" part of source repo if user didn't specify one
 109 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*/||g')
 110 [ -e "$dir" ] && echo "$dir already exists." && usage
 111 mkdir -p "$dir" &&
 112 D=$(
 113         (cd "$dir" && git-init-db && pwd)
 114 ) &&
 115 test -d "$D" || usage
 116
 117 # We do local magic only when the user tells us to.
 118 case "$local,$use_local" in
 119 yes,yes)
 120         ( cd "$repo/objects" ) || {
 121                 echo >&2 "-l flag seen but $repo is not local."
 122                 exit 1
 123         }
 124
 125         case "$local_shared" in
 126         no)
 127             # See if we can hardlink and drop "l" if not.
 128             sample_file=$(cd "$repo" && \
 129                           find objects -type f -print | sed -e 1q)
 130
 131             # objects directory should not be empty since we are cloning!
 132             test -f "$repo/$sample_file" || exit
 133
 134             l=
 135             if ln "$repo/$sample_file" "$D/.git/objects/sample" 2>/dev/null
 136             then
 137                     l=l
 138             fi &&
 139             rm -f "$D/.git/objects/sample" &&
 140             cd "$repo" &&
 141             find objects -depth -print | cpio -puamd$l "$D/.git/" || exit 1
 142             ;;
 143         yes)
 144             mkdir -p "$D/.git/objects/info"
 145             {
 146                 test -f "$repo/objects/info/alternates" &&
 147                 cat "$repo/objects/info/alternates";
 148                 echo "$repo/objects"
 149             } >"$D/.git/objects/info/alternates"
 150             ;;
 151         esac
 152
 153         # Make a duplicate of refs and HEAD pointer
 154         HEAD=
 155         if test -f "$repo/HEAD"
 156         then
 157                 HEAD=HEAD
 158         fi
 159         (cd "$repo" && tar cf - refs $HEAD) |
 160         (cd "$D/.git" && tar xf -) || exit 1
 161         ;;
 162 *)
 163         case "$repo" in
 164         rsync://*)
 165                 rsync $quiet -av --ignore-existing  \
 166                         --exclude info "$repo/objects/" "$D/.git/objects/" &&
 167                 rsync $quiet -av --ignore-existing  \
 168                         --exclude info "$repo/refs/" "$D/.git/refs/" || exit
 169
 170                 # Look at objects/info/alternates for rsync -- http will
 171                 # support it natively and git native ones will do it on the
 172                 # remote end.  Not having that file is not a crime.
 173                 rsync -q "$repo/objects/info/alternates" \
 174                         "$D/.git/TMP_ALT" 2>/dev/null ||
 175                         rm -f "$D/.git/TMP_ALT"
 176                 if test -f "$D/.git/TMP_ALT"
 177                 then
 178                     ( cd "$D" &&
 179                       . git-parse-remote &&
 180                       resolve_alternates "$repo" <"./.git/TMP_ALT" ) |
 181                     while read alt
 182                     do
 183                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 184                         case "$quiet" in
 185                         '')     echo >&2 "Getting alternate: $alt" ;;
 186                         esac
 187                         rsync $quiet -av --ignore-existing  \
 188                             --exclude info "$alt" "$D/.git/objects" || exit
 189                     done
 190                     rm -f "$D/.git/TMP_ALT"
 191                 fi
 192                 ;;
 193         http://*)
 194                 clone_dumb_http "$repo" "$D"
 195                 ;;
 196         *)
 197                 cd "$D" && case "$upload_pack" in
 198                 '') git-clone-pack $quiet "$repo" ;;
 199                 *) git-clone-pack $quiet "$upload_pack" "$repo" ;;
 200                 esac || {
 201                         echo >&2 "clone-pack from '$repo' failed."
 202                         exit 1
 203                 }
 204                 ;;
 205         esac
 206         ;;
 207 esac
 208
 209 cd "$D" || exit
 210
 211 if test -f ".git/HEAD"
 212 then
 213         head_points_at=`git-symbolic-ref HEAD`
 214         case "$head_points_at" in
 215         refs/heads/*)
 216                 head_points_at=`expr "$head_points_at" : 'refs/heads/\(.*\)'`
 217                 mkdir -p .git/remotes &&
 218                 echo >.git/remotes/origin \
 219                 "URL: $repo
 220 Pull: $head_points_at:$origin" &&
 221                 git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) &&
 222                 find .git/refs/heads -type f -print |
 223                 while read ref
 224                 do
 225                         head=`expr "$ref" : '.git/refs/heads/\(.*\)'` &&
 226                         test "$head_points_at" = "$head" ||
 227                         test "$origin" = "$head" ||
 228                         echo "Pull: ${head}:${head}"
 229                 done >>.git/remotes/origin
 230         esac
 231
 232         case "$no_checkout" in
 233         '')
 234                 git checkout
 235         esac
 236 fi