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