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>] [--use-separate-remote] [--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 "$name" in
  49                 *^*)    continue;;
  50                 esac
  51                 if test -n "$use_separate_remote" &&
  52                    branch_name=`expr "z$name" : 'zheads/\(.*\)'`
  53                 then
  54                         tname="remotes/$origin/$branch_name"
  55                 else
  56                         tname=$name
  57                 fi
  58                 git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
  59         done <"$clone_tmp/refs"
  60         rm -fr "$clone_tmp"
  61         http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
  62         rm -f "$GIT_DIR/REMOTE_HEAD"
  63 }
  64
  65 # Read git-fetch-pack -k output and store the remote branches.
  66 copy_refs='
  67 use File::Path qw(mkpath);
  68 use File::Basename qw(dirname);
  69 my $git_dir = $ARGV[0];
  70 my $use_separate_remote = $ARGV[1];
  71 my $origin = $ARGV[2];
  72
  73 my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
  74 my $tag_top = "tags";
  75
  76 sub store {
  77         my ($sha1, $name, $top) = @_;
  78         $name = "$git_dir/refs/$top/$name";
  79         mkpath(dirname($name));
  80         open O, ">", "$name";
  81         print O "$sha1\n";
  82         close O;
  83 }
  84
  85 open FH, "<", "$git_dir/CLONE_HEAD";
  86 while (<FH>) {
  87         my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
  88         next if ($name =~ /\^\173/);
  89         if ($name eq "HEAD") {
  90                 open O, ">", "$git_dir/REMOTE_HEAD";
  91                 print O "$sha1\n";
  92                 close O;
  93                 next;
  94         }
  95         if ($name =~ s/^refs\/heads\///) {
  96                 store($sha1, $name, $branch_top);
  97                 next;
  98         }
  99         if ($name =~ s/^refs\/tags\///) {
 100                 store($sha1, $name, $tag_top);
 101                 next;
 102         }
 103 }
 104 close FH;
 105 '
 106
 107 quiet=
 108 local=no
 109 use_local=no
 110 local_shared=no
 111 unset template
 112 no_checkout=
 113 upload_pack=
 114 bare=
 115 reference=
 116 origin=
 117 origin_override=
 118 use_separate_remote=
 119 while
 120         case "$#,$1" in
 121         0,*) break ;;
 122         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
 123         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
 124           no_checkout=yes ;;
 125         *,--na|*,--nak|*,--nake|*,--naked|\
 126         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
 127         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
 128         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
 129           local_shared=yes; use_local=yes ;;
 130         1,--template) usage ;;
 131         *,--template)
 132                 shift; template="--template=$1" ;;
 133         *,--template=*)
 134           template="$1" ;;
 135         *,-q|*,--quiet) quiet=-q ;;
 136         *,--use-separate-remote)
 137                 use_separate_remote=t ;;
 138         1,--reference) usage ;;
 139         *,--reference)
 140                 shift; reference="$1" ;;
 141         *,--reference=*)
 142                 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
 143         *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 144                 case "$2" in
 145                 '')
 146                     usage ;;
 147                 */*)
 148                     die "'$2' is not suitable for an origin name"
 149                 esac
 150                 git-check-ref-format "heads/$2" ||
 151                     die "'$2' is not suitable for a branch name"
 152                 test -z "$origin_override" ||
 153                     die "Do not give more than one --origin options."
 154                 origin_override=yes
 155                 origin="$2"; shift
 156                 ;;
 157         1,-u|1,--upload-pack) usage ;;
 158         *,-u|*,--upload-pack)
 159                 shift
 160                 upload_pack="--exec=$1" ;;
 161         *,-*) usage ;;
 162         *) break ;;
 163         esac
 164 do
 165         shift
 166 done
 167
 168 repo="$1"
 169 test -n "$repo" ||
 170     die 'you must specify a repository to clone.'
 171
 172 # --bare implies --no-checkout
 173 if test yes = "$bare"
 174 then
 175         if test yes = "$origin_override"
 176         then
 177                 die '--bare and --origin $origin options are incompatible.'
 178         fi
 179         if test t = "$use_separate_remote"
 180         then
 181                 die '--bare and --use-separate-remote options are incompatible.'
 182         fi
 183         no_checkout=yes
 184 fi
 185
 186 if test -z "$origin"
 187 then
 188         origin=origin
 189 fi
 190
 191 # Turn the source into an absolute path if
 192 # it is local
 193 if base=$(get_repo_base "$repo"); then
 194         repo="$base"
 195         local=yes
 196 fi
 197
 198 dir="$2"
 199 # Try using "humanish" part of source repo if user didn't specify one
 200 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 201 [ -e "$dir" ] && die "destination directory '$dir' already exists."
 202 mkdir -p "$dir" &&
 203 D=$(cd "$dir" && pwd) &&
 204 trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
 205 case "$bare" in
 206 yes)
 207         GIT_DIR="$D" ;;
 208 *)
 209         GIT_DIR="$D/.git" ;;
 210 esac && export GIT_DIR && git-init-db ${template+"$template"} || usage
 211
 212 if test -n "$reference"
 213 then
 214         if test -d "$reference"
 215         then
 216                 if test -d "$reference/.git/objects"
 217                 then
 218                         reference="$reference/.git"
 219                 fi
 220                 reference=$(cd "$reference" && pwd)
 221                 echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
 222                 (cd "$reference" && tar cf - refs) |
 223                 (cd "$GIT_DIR/refs" &&
 224                  mkdir reference-tmp &&
 225                  cd reference-tmp &&
 226                  tar xf -)
 227         else
 228                 die "reference repository '$reference' is not a local directory."
 229         fi
 230 fi
 231
 232 rm -f "$GIT_DIR/CLONE_HEAD"
 233
 234 # We do local magic only when the user tells us to.
 235 case "$local,$use_local" in
 236 yes,yes)
 237         ( cd "$repo/objects" ) ||
 238                 die "-l flag seen but repository '$repo' is not local."
 239
 240         case "$local_shared" in
 241         no)
 242             # See if we can hardlink and drop "l" if not.
 243             sample_file=$(cd "$repo" && \
 244                           find objects -type f -print | sed -e 1q)
 245
 246             # objects directory should not be empty since we are cloning!
 247             test -f "$repo/$sample_file" || exit
 248
 249             l=
 250             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 251             then
 252                     l=l
 253             fi &&
 254             rm -f "$GIT_DIR/objects/sample" &&
 255             cd "$repo" &&
 256             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 257             ;;
 258         yes)
 259             mkdir -p "$GIT_DIR/objects/info"
 260             echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
 261             ;;
 262         esac
 263         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 264         ;;
 265 *)
 266         case "$repo" in
 267         rsync://*)
 268                 rsync $quiet -av --ignore-existing  \
 269                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 270                 exit
 271                 # Look at objects/info/alternates for rsync -- http will
 272                 # support it natively and git native ones will do it on the
 273                 # remote end.  Not having that file is not a crime.
 274                 rsync -q "$repo/objects/info/alternates" \
 275                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 276                         rm -f "$GIT_DIR/TMP_ALT"
 277                 if test -f "$GIT_DIR/TMP_ALT"
 278                 then
 279                     ( cd "$D" &&
 280                       . git-parse-remote &&
 281                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 282                     while read alt
 283                     do
 284                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 285                         case "$quiet" in
 286                         '')     echo >&2 "Getting alternate: $alt" ;;
 287                         esac
 288                         rsync $quiet -av --ignore-existing  \
 289                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 290                     done
 291                     rm -f "$GIT_DIR/TMP_ALT"
 292                 fi
 293                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 294                 ;;
 295         https://*|http://*|ftp://*)
 296                 if test -z "@@NO_CURL@@"
 297                 then
 298                         clone_dumb_http "$repo" "$D"
 299                 else
 300                         die "http transport not supported, rebuild Git with curl support"
 301                 fi
 302                 ;;
 303         *)
 304                 case "$upload_pack" in
 305                 '') git-fetch-pack --all -k $quiet "$repo" ;;
 306                 *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
 307                 esac >"$GIT_DIR/CLONE_HEAD" ||
 308                         die "fetch-pack from '$repo' failed."
 309                 ;;
 310         esac
 311         ;;
 312 esac
 313 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 314
 315 if test -f "$GIT_DIR/CLONE_HEAD"
 316 then
 317         # Read git-fetch-pack -k output and store the remote branches.
 318         @@PERL@@ -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin" ||
 319         exit
 320 fi
 321
 322 cd "$D" || exit
 323
 324 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 325 then
 326         # Figure out which remote branch HEAD points at.
 327         case "$use_separate_remote" in
 328         '')     remote_top=refs/heads ;;
 329         *)      remote_top="refs/remotes/$origin" ;;
 330         esac
 331
 332         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 333         case "$head_sha1" in
 334         'ref: refs/'*)
 335                 # Uh-oh, the remote told us (http transport done against
 336                 # new style repository with a symref HEAD).
 337                 # Ideally we should skip the guesswork but for now
 338                 # opt for minimum change.
 339                 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 340                 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 341                 ;;
 342         esac
 343
 344         # The name under $remote_top the remote HEAD seems to point at.
 345         head_points_at=$(
 346                 (
 347                         echo "master"
 348                         cd "$GIT_DIR/$remote_top" &&
 349                         find . -type f -print | sed -e 's/^\.\///'
 350                 ) | (
 351                 done=f
 352                 while read name
 353                 do
 354                         test t = $done && continue
 355                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 356                         if test "$head_sha1" = "$branch_tip"
 357                         then
 358                                 echo "$name"
 359                                 done=t
 360                         fi
 361                 done
 362                 )
 363         )
 364
 365         # Write out remotes/$origin file, and update our "$head_points_at".
 366         case "$head_points_at" in
 367         ?*)
 368                 mkdir -p "$GIT_DIR/remotes" &&
 369                 git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
 370                 case "$use_separate_remote" in
 371                 t)      origin_track="$remote_top/$head_points_at"
 372                         git-update-ref HEAD "$head_sha1" ;;
 373                 *)      origin_track="$remote_top/$origin"
 374                         git-update-ref "refs/heads/$origin" "$head_sha1" ;;
 375                 esac &&
 376                 echo >"$GIT_DIR/remotes/$origin" \
 377                 "URL: $repo
 378 Pull: refs/heads/$head_points_at:$origin_track" &&
 379                 (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
 380                 while read dotslref
 381                 do
 382                         name=`expr "$dotslref" : './\(.*\)'`
 383                         if test "z$head_points_at" = "z$name"
 384                         then
 385                                 continue
 386                         fi
 387                         if test "$use_separate_remote" = '' &&
 388                            test "z$origin" = "z$name"
 389                         then
 390                                 continue
 391                         fi
 392                         echo "Pull: refs/heads/${name}:$remote_top/${name}"
 393                 done >>"$GIT_DIR/remotes/$origin" &&
 394                 case "$use_separate_remote" in
 395                 t)
 396                         rm -f "refs/remotes/$origin/HEAD"
 397                         git-symbolic-ref "refs/remotes/$origin/HEAD" \
 398                                 "refs/remotes/$origin/$head_points_at"
 399                 esac
 400         esac
 401
 402         case "$no_checkout" in
 403         '')
 404                 git-read-tree -m -u -v HEAD HEAD
 405         esac
 406 fi
 407 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 408
 409 trap - 0
 410