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 [--naked] [-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 "$clone_tmp"
  49 }
  50
  51 quiet=
  52 use_local=no
  53 local_shared=no
  54 no_checkout=
  55 upload_pack=
  56 naked=
  57 origin=origin
  58 while
  59         case "$#,$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) naked=yes ;;
  65         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  66         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  67           local_shared=yes; use_local=yes ;;
  68         *,-q|*,--quiet) quiet=-q ;;
  69         1,-o) usage;;
  70         *,-o)
  71                 git-check-ref-format "$2" || {
  72                     echo >&2 "'$2' is not suitable for a branch name"
  73                     exit 1
  74                 }
  75                 origin="$2"; shift
  76                 ;;
  77         1,-u|1,--upload-pack) usage ;;
  78         *,-u|*,--upload-pack)
  79                 shift
  80                 upload_pack="--exec=$1" ;;
  81         *,-*) usage ;;
  82         *) break ;;
  83         esac
  84 do
  85         shift
  86 done
  87
  88 # --naked implies --no-checkout
  89 test -z "$naked" || no_checkout=yes
  90
  91 # Turn the source into an absolute path if
  92 # it is local
  93 repo="$1"
  94 local=no
  95 if base=$(get_repo_base "$repo"); then
  96         repo="$base"
  97         local=yes
  98 fi
  99
 100 dir="$2"
 101 # Try using "humanish" part of source repo if user didn't specify one
 102 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*/||g')
 103 [ -e "$dir" ] && echo "$dir already exists." && usage
 104 mkdir -p "$dir" &&
 105 D=$(cd "$dir" && pwd) &&
 106 case "$naked" in
 107 yes) GIT_DIR="$D" ;;
 108 *) GIT_DIR="$D/.git" ;;
 109 esac && export GIT_DIR && git-init-db || usage
 110 case "$naked" in
 111 yes)
 112         GIT_DIR="$D" ;;
 113 *)
 114         GIT_DIR="$D/.git" ;;
 115 esac
 116
 117 # We do local magic only when the user tells us to.
 118 case "$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" "$GIT_DIR/objects/sample" 2>/dev/null
 136             then
 137                     l=l
 138             fi &&
 139             rm -f "$GIT_DIR/objects/sample" &&
 140             cd "$repo" &&
 141             find objects -depth -print | cpio -puamd$l "$GIT_DIR/" || exit 1
 142             ;;
 143         yes)
 144             mkdir -p "$GIT_DIR/objects/info"
 145             {
 146                 test -f "$repo/objects/info/alternates" &&
 147                 cat "$repo/objects/info/alternates";
 148                 echo "$repo/objects"
 149             } >"$GIT_DIR/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 $HEAD) |
 160         (cd "$GIT_DIR" && tar xf -) || exit 1
 161         ;;
 162 *)
 163         case "$repo" in
 164         rsync://*)
 165                 rsync $quiet -av --ignore-existing  \
 166                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" &&
 167                 rsync $quiet -av --ignore-existing  \
 168                         --exclude info "$repo/refs/" "$GIT_DIR/refs/" || exit
 169
 170                 # Look at objects/info/alternates for rsync -- http will
 171                 # support it natively and git native ones will do it on the
 172                 # remote end.  Not having that file is not a crime.
 173                 rsync -q "$repo/objects/info/alternates" \
 174                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 175                         rm -f "$GIT_DIR/TMP_ALT"
 176                 if test -f "$GIT_DIR/TMP_ALT"
 177                 then
 178                     ( cd "$D" &&
 179                       . git-parse-remote &&
 180                       resolve_alternates "$repo" <"$GIT_DIR/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" "$GIT_DIR/objects" || exit
 189                     done
 190                     rm -f "$GIT_DIR/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_DIR/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 "$GIT_DIR/remotes" &&
 218                 echo >"$GIT_DIR/remotes/origin" \
 219                 "URL: $repo
 220 Pull: $head_points_at:$origin" &&
 221                 git-update-ref "refs/heads/$origin" $(git-rev-parse HEAD) &&
 222                 (cd "$GIT_DIR" && find "refs/heads" -type f -print) |
 223                 while read ref
 224                 do
 225                         head=`expr "$ref" : 'refs/heads/\(.*\)'` &&
 226                         test "$head_points_at" = "$head" ||
 227                         test "$origin" = "$head" ||
 228                         echo "Pull: ${head}:${head}"
 229                 done >>"$GIT_DIR/remotes/origin"
 230         esac
 231
 232         case "$no_checkout" in
 233         '')
 234                 git checkout
 235         esac
 236 fi