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