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 die() {
  12         echo >&2 "$@"
  13         exit 1
  14 }
  15
  16 usage() {
  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 }
  19
  20 get_repo_base() {
  21         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
  22 }
  23
  24 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
  25     curl_extra_args="-k"
  26 fi
  27
  28 http_fetch () {
  29         # $1 = Remote, $2 = Local
  30         curl -nsfL $curl_extra_args "$1" >"$2"
  31 }
  32
  33 clone_dumb_http () {
  34         # $1 - remote, $2 - local
  35         cd "$2" &&
  36         clone_tmp="$GIT_DIR/clone-tmp" &&
  37         mkdir -p "$clone_tmp" || exit 1
  38         if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
  39                 "`git-repo-config --bool http.noEPSV`" = true ]; then
  40                 curl_extra_args="${curl_extra_args} --disable-epsv"
  41         fi
  42         http_fetch "$1/info/refs" "$clone_tmp/refs" ||
  43                 die "Cannot get remote repository information.
  44 Perhaps git-update-server-info needs to be run there?"
  45         while read sha1 refname
  46         do
  47                 name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
  48                 case "$name" in
  49                 *^*)    continue;;
  50                 esac
  51                 case "$bare,$name" in
  52                 yes,* | ,heads/* | ,tags/*) ;;
  53                 *)      continue ;;
  54                 esac
  55                 if test -n "$use_separate_remote" &&
  56                    branch_name=`expr "z$name" : 'zheads/\(.*\)'`
  57                 then
  58                         tname="remotes/$origin/$branch_name"
  59                 else
  60                         tname=$name
  61                 fi
  62                 git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
  63         done <"$clone_tmp/refs"
  64         rm -fr "$clone_tmp"
  65         http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
  66         rm -f "$GIT_DIR/REMOTE_HEAD"
  67 }
  68
  69 # Read git-fetch-pack -k output and store the remote branches.
  70 copy_refs='
  71 use File::Path qw(mkpath);
  72 use File::Basename qw(dirname);
  73 my $git_dir = $ARGV[0];
  74 my $use_separate_remote = $ARGV[1];
  75 my $origin = $ARGV[2];
  76
  77 my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
  78 my $tag_top = "tags";
  79
  80 sub store {
  81         my ($sha1, $name, $top) = @_;
  82         $name = "$git_dir/refs/$top/$name";
  83         mkpath(dirname($name));
  84         open O, ">", "$name";
  85         print O "$sha1\n";
  86         close O;
  87 }
  88
  89 open FH, "<", "$git_dir/CLONE_HEAD";
  90 while (<FH>) {
  91         my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
  92         next if ($name =~ /\^\173/);
  93         if ($name eq "HEAD") {
  94                 open O, ">", "$git_dir/REMOTE_HEAD";
  95                 print O "$sha1\n";
  96                 close O;
  97                 next;
  98         }
  99         if ($name =~ s/^refs\/heads\///) {
 100                 store($sha1, $name, $branch_top);
 101                 next;
 102         }
 103         if ($name =~ s/^refs\/tags\///) {
 104                 store($sha1, $name, $tag_top);
 105                 next;
 106         }
 107 }
 108 close FH;
 109 '
 110
 111 quiet=
 112 local=no
 113 use_local=no
 114 local_shared=no
 115 unset template
 116 no_checkout=
 117 upload_pack=
 118 bare=
 119 reference=
 120 origin=
 121 origin_override=
 122 use_separate_remote=t
 123 depth=
 124 while
 125         case "$#,$1" in
 126         0,*) break ;;
 127         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
 128         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
 129           no_checkout=yes ;;
 130         *,--na|*,--nak|*,--nake|*,--naked|\
 131         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
 132         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
 133         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
 134           local_shared=yes; use_local=yes ;;
 135         1,--template) usage ;;
 136         *,--template)
 137                 shift; template="--template=$1" ;;
 138         *,--template=*)
 139           template="$1" ;;
 140         *,-q|*,--quiet) quiet=-q ;;
 141         *,--use-separate-remote) ;;
 142         *,--no-separate-remote)
 143                 die "clones are always made with separate-remote layout" ;;
 144         1,--reference) usage ;;
 145         *,--reference)
 146                 shift; reference="$1" ;;
 147         *,--reference=*)
 148                 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
 149         *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 150                 case "$2" in
 151                 '')
 152                     usage ;;
 153                 */*)
 154                     die "'$2' is not suitable for an origin name"
 155                 esac
 156                 git-check-ref-format "heads/$2" ||
 157                     die "'$2' is not suitable for a branch name"
 158                 test -z "$origin_override" ||
 159                     die "Do not give more than one --origin options."
 160                 origin_override=yes
 161                 origin="$2"; shift
 162                 ;;
 163         1,-u|1,--upload-pack) usage ;;
 164         *,-u|*,--upload-pack)
 165                 shift
 166                 upload_pack="--exec=$1" ;;
 167         1,--depth) usage;;
 168         *,--depth)
 169                 shift
 170                 depth="--depth=$1";;
 171         *,-*) usage ;;
 172         *) break ;;
 173         esac
 174 do
 175         shift
 176 done
 177
 178 repo="$1"
 179 test -n "$repo" ||
 180     die 'you must specify a repository to clone.'
 181
 182 # --bare implies --no-checkout and --no-separate-remote
 183 if test yes = "$bare"
 184 then
 185         if test yes = "$origin_override"
 186         then
 187                 die '--bare and --origin $origin options are incompatible.'
 188         fi
 189         no_checkout=yes
 190         use_separate_remote=
 191 fi
 192
 193 if test -z "$origin"
 194 then
 195         origin=origin
 196 fi
 197
 198 # Turn the source into an absolute path if
 199 # it is local
 200 if base=$(get_repo_base "$repo"); then
 201         repo="$base"
 202         local=yes
 203 fi
 204
 205 dir="$2"
 206 # Try using "humanish" part of source repo if user didn't specify one
 207 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 208 [ -e "$dir" ] && die "destination directory '$dir' already exists."
 209 mkdir -p "$dir" &&
 210 D=$(cd "$dir" && pwd) &&
 211 trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
 212 case "$bare" in
 213 yes)
 214         GIT_DIR="$D" ;;
 215 *)
 216         GIT_DIR="$D/.git" ;;
 217 esac && export GIT_DIR && git-init ${template+"$template"} || usage
 218
 219 if test -n "$reference"
 220 then
 221         if test -d "$reference"
 222         then
 223                 if test -d "$reference/.git/objects"
 224                 then
 225                         reference="$reference/.git"
 226                 fi
 227                 reference=$(cd "$reference" && pwd)
 228                 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
 229                 (cd "$reference" && tar cf - refs) |
 230                 (cd "$GIT_DIR/refs" &&
 231                  mkdir reference-tmp &&
 232                  cd reference-tmp &&
 233                  tar xf -)
 234         else
 235                 die "reference repository '$reference' is not a local directory."
 236         fi
 237 fi
 238
 239 rm -f "$GIT_DIR/CLONE_HEAD"
 240
 241 # We do local magic only when the user tells us to.
 242 case "$local,$use_local" in
 243 yes,yes)
 244         ( cd "$repo/objects" ) ||
 245                 die "-l flag seen but repository '$repo' is not local."
 246
 247         case "$local_shared" in
 248         no)
 249             # See if we can hardlink and drop "l" if not.
 250             sample_file=$(cd "$repo" && \
 251                           find objects -type f -print | sed -e 1q)
 252
 253             # objects directory should not be empty since we are cloning!
 254             test -f "$repo/$sample_file" || exit
 255
 256             l=
 257             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 258             then
 259                     l=l
 260             fi &&
 261             rm -f "$GIT_DIR/objects/sample" &&
 262             cd "$repo" &&
 263             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 264             ;;
 265         yes)
 266             mkdir -p "$GIT_DIR/objects/info"
 267             echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
 268             ;;
 269         esac
 270         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 271         ;;
 272 *)
 273         case "$repo" in
 274         rsync://*)
 275                 case "$depth" in
 276                 "") ;;
 277                 *) die "shallow over rsync not supported" ;;
 278                 esac
 279                 rsync $quiet -av --ignore-existing  \
 280                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 281                 exit
 282                 # Look at objects/info/alternates for rsync -- http will
 283                 # support it natively and git native ones will do it on the
 284                 # remote end.  Not having that file is not a crime.
 285                 rsync -q "$repo/objects/info/alternates" \
 286                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 287                         rm -f "$GIT_DIR/TMP_ALT"
 288                 if test -f "$GIT_DIR/TMP_ALT"
 289                 then
 290                     ( cd "$D" &&
 291                       . git-parse-remote &&
 292                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 293                     while read alt
 294                     do
 295                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 296                         case "$quiet" in
 297                         '')     echo >&2 "Getting alternate: $alt" ;;
 298                         esac
 299                         rsync $quiet -av --ignore-existing  \
 300                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 301                     done
 302                     rm -f "$GIT_DIR/TMP_ALT"
 303                 fi
 304                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 305                 ;;
 306         https://*|http://*|ftp://*)
 307                 case "$depth" in
 308                 "") ;;
 309                 *) die "shallow over http or ftp not supported" ;;
 310                 esac
 311                 if test -z "@@NO_CURL@@"
 312                 then
 313                         clone_dumb_http "$repo" "$D"
 314                 else
 315                         die "http transport not supported, rebuild Git with curl support"
 316                 fi
 317                 ;;
 318         *)
 319                 case "$upload_pack" in
 320                 '') git-fetch-pack --all -k $quiet $depth "$repo" ;;
 321                 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth "$repo" ;;
 322                 esac >"$GIT_DIR/CLONE_HEAD" ||
 323                         die "fetch-pack from '$repo' failed."
 324                 ;;
 325         esac
 326         ;;
 327 esac
 328 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 329
 330 if test -f "$GIT_DIR/CLONE_HEAD"
 331 then
 332         # Read git-fetch-pack -k output and store the remote branches.
 333         @@PERL@@ -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin" ||
 334         exit
 335 fi
 336
 337 cd "$D" || exit
 338
 339 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 340 then
 341         # a non-bare repository is always in separate-remote layout
 342         remote_top="refs/remotes/$origin"
 343         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 344         case "$head_sha1" in
 345         'ref: refs/'*)
 346                 # Uh-oh, the remote told us (http transport done against
 347                 # new style repository with a symref HEAD).
 348                 # Ideally we should skip the guesswork but for now
 349                 # opt for minimum change.
 350                 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 351                 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 352                 ;;
 353         esac
 354
 355         # The name under $remote_top the remote HEAD seems to point at.
 356         head_points_at=$(
 357                 (
 358                         test -f "$GIT_DIR/$remote_top/master" && echo "master"
 359                         cd "$GIT_DIR/$remote_top" &&
 360                         find . -type f -print | sed -e 's/^\.\///'
 361                 ) | (
 362                 done=f
 363                 while read name
 364                 do
 365                         test t = $done && continue
 366                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 367                         if test "$head_sha1" = "$branch_tip"
 368                         then
 369                                 echo "$name"
 370                                 done=t
 371                         fi
 372                 done
 373                 )
 374         )
 375
 376         # Write out remote.$origin config, and update our "$head_points_at".
 377         case "$head_points_at" in
 378         ?*)
 379                 # Local default branch
 380                 git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
 381
 382                 # Tracking branch for the primary branch at the remote.
 383                 origin_track="$remote_top/$head_points_at" &&
 384                 git-update-ref HEAD "$head_sha1" &&
 385
 386                 # Upstream URL
 387                 git-repo-config remote."$origin".url "$repo" &&
 388
 389                 # Set up the mappings to track the remote branches.
 390                 git-repo-config remote."$origin".fetch \
 391                         "+refs/heads/*:$remote_top/*" '^$' &&
 392                 rm -f "refs/remotes/$origin/HEAD"
 393                 git-symbolic-ref "refs/remotes/$origin/HEAD" \
 394                         "refs/remotes/$origin/$head_points_at" &&
 395
 396                 git-repo-config branch."$head_points_at".remote "$origin" &&
 397                 git-repo-config branch."$head_points_at".merge "refs/heads/$head_points_at"
 398         esac
 399
 400         case "$no_checkout" in
 401         '')
 402                 test "z$quiet" = z && v=-v || v=
 403                 git-read-tree -m -u $v HEAD HEAD
 404         esac
 405 fi
 406 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 407
 408 trap - 0
 409