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 OPTIONS_SPEC="\
  12 git-clone [options] [--] <repo> [<dir>]
  13 --
  14 n,no-checkout        don't create a checkout
  15 bare                 create a bare repository
  16 naked                create a bare repository
  17 l,local              to clone from a local repository
  18 no-hardlinks         don't use local hardlinks, always copy
  19 s,shared             setup as a shared repository
  20 template=            path to the template directory
  21 q,quiet              be quiet
  22 reference=           reference repository
  23 o,origin=            use <name> instead of 'origin' to track upstream
  24 u,upload-pack=       path to git-upload-pack on the remote
  25 depth=               create a shallow clone of that depth
  26
  27 use-separate-remote  compatibility, do not use
  28 no-separate-remote   compatibility, do not use"
  29
  30 die() {
  31         echo >&2 "$@"
  32         exit 1
  33 }
  34
  35 # Fix some commands on Windows
  36 case $(uname -s) in
  37 *MINGW*)
  38         # Windows has its own (incompatible) find
  39         find () {
  40                 /usr/bin/find "$@"
  41         }
  42         # need an emulation of cpio
  43         cpio() {
  44                 case "$1" in
  45                 -pumd)  cp_arg=-pr;;
  46                 -pumdl) cp_arg=-lr;;
  47                 *)      die "cpio $1 unexpected";;
  48                 esac
  49                 # copy only files and empty directories
  50                 prev=
  51                 while read f; do
  52                         if test -d "$f"; then
  53                                 # here we assume that directories are listed after
  54                                 # its files (aka 'find -depth'), hence, a directory
  55                                 # that is not empty will be a leading sub-string
  56                                 # of the preceding entry
  57                                 case "$prev" in
  58                                 "$f"/* ) ;;
  59                                 *)      echo "$f";;
  60                                 esac
  61                         else
  62                                 echo "$f"
  63                         fi
  64                         prev="$f"
  65                 done |
  66                 xargs --no-run-if-empty \
  67                         cp $cp_arg --target-directory="$2" --parents
  68         }
  69         ;;
  70 esac
  71
  72 usage() {
  73         exec "$0" -h
  74 }
  75
  76 eval "$(echo "$OPTIONS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
  77
  78 get_repo_base() {
  79         (
  80                 cd "`/bin/pwd -W`" &&
  81                 cd "$1" || cd "$1.git" &&
  82                 {
  83                         cd .git
  84                         pwd -W
  85                 }
  86         ) 2>/dev/null
  87 }
  88
  89 if [ -n "$GIT_SSL_NO_VERIFY" -o \
  90         "`git config --bool http.sslVerify`" = false ]; then
  91     curl_extra_args="-k"
  92 fi
  93
  94 http_fetch () {
  95         # $1 = Remote, $2 = Local
  96         curl -nsfL $curl_extra_args "$1" >"$2" ||
  97                 case $? in
  98                 126|127) exit ;;
  99                 *)       return $? ;;
 100                 esac
 101 }
 102
 103 clone_dumb_http () {
 104         # $1 - remote, $2 - local
 105         cd "$2" &&
 106         clone_tmp="$GIT_DIR/clone-tmp" &&
 107         mkdir -p "$clone_tmp" || exit 1
 108         if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
 109                 "`git config --bool http.noEPSV`" = true ]; then
 110                 curl_extra_args="${curl_extra_args} --disable-epsv"
 111         fi
 112         http_fetch "$1/info/refs" "$clone_tmp/refs" ||
 113                 die "Cannot get remote repository information.
 114 Perhaps git-update-server-info needs to be run there?"
 115         test "z$quiet" = z && v=-v || v=
 116         while read sha1 refname
 117         do
 118                 name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
 119                 case "$name" in
 120                 *^*)    continue;;
 121                 esac
 122                 case "$bare,$name" in
 123                 yes,* | ,heads/* | ,tags/*) ;;
 124                 *)      continue ;;
 125                 esac
 126                 if test -n "$use_separate_remote" &&
 127                    branch_name=`expr "z$name" : 'zheads/\(.*\)'`
 128                 then
 129                         tname="remotes/$origin/$branch_name"
 130                 else
 131                         tname=$name
 132                 fi
 133                 git-http-fetch $v -a -w "$tname" "$sha1" "$1" || exit 1
 134         done <"$clone_tmp/refs"
 135         rm -fr "$clone_tmp"
 136         http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
 137         rm -f "$GIT_DIR/REMOTE_HEAD"
 138         if test -f "$GIT_DIR/REMOTE_HEAD"; then
 139                 head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 140                 case "$head_sha1" in
 141                 'ref: refs/'*)
 142                         ;;
 143                 *)
 144                         git-http-fetch $v -a "$head_sha1" "$1" ||
 145                         rm -f "$GIT_DIR/REMOTE_HEAD"
 146                         ;;
 147                 esac
 148         fi
 149 }
 150
 151 quiet=
 152 local=no
 153 use_local_hardlink=yes
 154 local_shared=no
 155 unset template
 156 no_checkout=
 157 upload_pack=
 158 bare=
 159 reference=
 160 origin=
 161 origin_override=
 162 use_separate_remote=t
 163 depth=
 164 no_progress=
 165 test "@@NO_HARDLINKS@@" && use_local_hardlink=no
 166 test -t 1 || no_progress=--no-progress
 167
 168 while test $# != 0
 169 do
 170         case "$1" in
 171         -n|--no-checkout)
 172                 no_checkout=yes ;;
 173         --naked|--bare)
 174                 bare=yes ;;
 175         -l|--local)
 176                 local_explicitly_asked_for=yes
 177        (test "@@NO_HARDLINKS@@" &&
 178             echo >&2 "Warning: -l asked but hardlinks are not supported") ||
 179                 use_local_hardlink=yes
 180                 ;;
 181         --no-hardlinks)
 182                 use_local_hardlink=no ;;
 183         -s|--shared)
 184                 local_shared=yes ;;
 185         --template)
 186                 shift; template="--template=$1" ;;
 187         -q|--quiet)
 188                 quiet=-q ;;
 189         --use-separate-remote|--no-separate-remote)
 190                 die "clones are always made with separate-remote layout" ;;
 191         --reference)
 192                 shift; reference="$1" ;;
 193         -o,--origin)
 194                 shift;
 195                 case "$1" in
 196                 '')
 197                     usage ;;
 198                 */*)
 199                     die "'$1' is not suitable for an origin name"
 200                 esac
 201                 git check-ref-format "heads/$1" ||
 202                     die "'$1' is not suitable for a branch name"
 203                 test -z "$origin_override" ||
 204                     die "Do not give more than one --origin options."
 205                 origin_override=yes
 206                 origin="$1"
 207                 ;;
 208         -u|--upload-pack)
 209                 shift
 210                 upload_pack="--upload-pack=$1" ;;
 211         --depth)
 212                 shift
 213                 depth="--depth=$1" ;;
 214         --)
 215                 shift
 216                 break ;;
 217         *)
 218                 usage ;;
 219         esac
 220         shift
 221 done
 222
 223 repo="$1"
 224 test -n "$repo" ||
 225     die 'you must specify a repository to clone.'
 226
 227 # --bare implies --no-checkout and --no-separate-remote
 228 if test yes = "$bare"
 229 then
 230         if test yes = "$origin_override"
 231         then
 232                 die '--bare and --origin $origin options are incompatible.'
 233         fi
 234         no_checkout=yes
 235         use_separate_remote=
 236 fi
 237
 238 if test -z "$origin"
 239 then
 240         origin=origin
 241 fi
 242
 243 # Turn the source into an absolute path if
 244 # it is local
 245 if base=$(get_repo_base "$repo"); then
 246         repo="$base"
 247         local=yes
 248 fi
 249
 250 dir="$2"
 251 # Try using "humanish" part of source repo if user didn't specify one
 252 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 253 [ -e "$dir" ] && die "destination directory '$dir' already exists."
 254 [ yes = "$bare" ] && unset GIT_WORK_TREE
 255 [ -n "$GIT_WORK_TREE" ] && [ -e "$GIT_WORK_TREE" ] &&
 256 die "working tree '$GIT_WORK_TREE' already exists."
 257 D=
 258 W=
 259 cleanup() {
 260         err=$?
 261         test -z "$D" && rm -rf "$dir"
 262         test -z "$W" && test -n "$GIT_WORK_TREE" && rm -rf "$GIT_WORK_TREE"
 263         cd ..
 264         test -n "$D" && rm -rf "$D"
 265         test -n "$W" && rm -rf "$W"
 266         exit $err
 267 }
 268 trap cleanup 0
 269 mkdir -p "$dir" && D=$(cd "$dir" && pwd) || usage
 270 test -n "$GIT_WORK_TREE" && mkdir -p "$GIT_WORK_TREE" &&
 271 W=$(cd "$GIT_WORK_TREE" && pwd) && export GIT_WORK_TREE="$W"
 272 if test yes = "$bare" || test -n "$GIT_WORK_TREE"; then
 273         GIT_DIR="$D"
 274 else
 275         GIT_DIR="$D/.git"
 276 fi &&
 277 export GIT_DIR &&
 278 GIT_CONFIG="$GIT_DIR/config" git-init $quiet ${template+"$template"} || usage
 279
 280 if test -n "$bare"
 281 then
 282         GIT_CONFIG="$GIT_DIR/config" git config core.bare true
 283 fi
 284
 285 if test -n "$reference"
 286 then
 287         ref_git=
 288         if test -d "$reference"
 289         then
 290                 if test -d "$reference/.git/objects"
 291                 then
 292                         ref_git="$reference/.git"
 293                 elif test -d "$reference/objects"
 294                 then
 295                         ref_git="$reference"
 296                 fi
 297         fi
 298         if test -n "$ref_git"
 299         then
 300                 ref_git=$(cd "$ref_git" && pwd)
 301                 echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
 302                 (
 303                         GIT_DIR="$ref_git" git for-each-ref \
 304                                 --format='%(objectname) %(*objectname)'
 305                 ) |
 306                 while read a b
 307                 do
 308                         test -z "$a" ||
 309                         git update-ref "refs/reference-tmp/$a" "$a"
 310                         test -z "$b" ||
 311                         git update-ref "refs/reference-tmp/$b" "$b"
 312                 done
 313         else
 314                 die "reference repository '$reference' is not a local directory."
 315         fi
 316 fi
 317
 318 rm -f "$GIT_DIR/CLONE_HEAD"
 319
 320 # We do local magic only when the user tells us to.
 321 case "$local" in
 322 yes)
 323         ( cd "$repo/objects" ) ||
 324                 die "cannot chdir to local '$repo/objects'."
 325
 326         if test "$local_shared" = yes
 327         then
 328                 mkdir -p "$GIT_DIR/objects/info"
 329                 echo "$repo/objects" >>"$GIT_DIR/objects/info/alternates"
 330         else
 331                 l= &&
 332                 if test "$use_local_hardlink" = yes
 333                 then
 334                         # See if we can hardlink and drop "l" if not.
 335                         sample_file=$(cd "$repo" && \
 336                                       find objects -type f -print | sed -e 1q)
 337                         # objects directory should not be empty because
 338                         # we are cloning!
 339                         test -f "$repo/$sample_file" || exit
 340                         if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 341                         then
 342                                 rm -f "$GIT_DIR/objects/sample"
 343                                 l=l
 344                         elif test -n "$local_explicitly_asked_for"
 345                         then
 346                                 echo >&2 "Warning: -l asked but cannot hardlink to $repo"
 347                         fi
 348                 fi &&
 349                 cd "$repo" &&
 350                 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 351         fi
 352         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 353         ;;
 354 *)
 355         case "$repo" in
 356         rsync://*)
 357                 case "$depth" in
 358                 "") ;;
 359                 *) die "shallow over rsync not supported" ;;
 360                 esac
 361                 rsync $quiet -av --ignore-existing  \
 362                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 363                 exit
 364                 # Look at objects/info/alternates for rsync -- http will
 365                 # support it natively and git native ones will do it on the
 366                 # remote end.  Not having that file is not a crime.
 367                 rsync -q "$repo/objects/info/alternates" \
 368                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 369                         rm -f "$GIT_DIR/TMP_ALT"
 370                 if test -f "$GIT_DIR/TMP_ALT"
 371                 then
 372                     ( cd "$D" &&
 373                       . git-parse-remote &&
 374                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 375                     while read alt
 376                     do
 377                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 378                         case "$quiet" in
 379                         '')     echo >&2 "Getting alternate: $alt" ;;
 380                         esac
 381                         rsync $quiet -av --ignore-existing  \
 382                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 383                     done
 384                     rm -f "$GIT_DIR/TMP_ALT"
 385                 fi
 386                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 387                 ;;
 388         https://*|http://*|ftp://*)
 389                 case "$depth" in
 390                 "") ;;
 391                 *) die "shallow over http or ftp not supported" ;;
 392                 esac
 393                 if test -z "@@NO_CURL@@"
 394                 then
 395                         clone_dumb_http "$repo" "$D"
 396                 else
 397                         die "http transport not supported, rebuild Git with curl support"
 398                 fi
 399                 ;;
 400         *)
 401                 case "$upload_pack" in
 402                 '') git-fetch-pack --all -k $quiet $depth $no_progress "$repo";;
 403                 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth $no_progress "$repo" ;;
 404                 esac >"$GIT_DIR/CLONE_HEAD" ||
 405                         die "fetch-pack from '$repo' failed."
 406                 ;;
 407         esac
 408         ;;
 409 esac
 410 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 411
 412 if test -f "$GIT_DIR/CLONE_HEAD"
 413 then
 414         # Read git-fetch-pack -k output and store the remote branches.
 415         if [ -n "$use_separate_remote" ]
 416         then
 417                 branch_top="remotes/$origin"
 418         else
 419                 branch_top="heads"
 420         fi
 421         tag_top="tags"
 422         while read sha1 name
 423         do
 424                 case "$name" in
 425                 *'^{}')
 426                         continue ;;
 427                 HEAD)
 428                         destname="REMOTE_HEAD" ;;
 429                 refs/heads/*)
 430                         destname="refs/$branch_top/${name#refs/heads/}" ;;
 431                 refs/tags/*)
 432                         destname="refs/$tag_top/${name#refs/tags/}" ;;
 433                 *)
 434                         continue ;;
 435                 esac
 436                 git update-ref -m "clone: from $repo" "$destname" "$sha1" ""
 437         done < "$GIT_DIR/CLONE_HEAD"
 438 fi
 439
 440 if test -n "$W"; then
 441         cd "$W" || exit
 442 else
 443         cd "$D" || exit
 444 fi
 445
 446 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 447 then
 448         # a non-bare repository is always in separate-remote layout
 449         remote_top="refs/remotes/$origin"
 450         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 451         case "$head_sha1" in
 452         'ref: refs/'*)
 453                 # Uh-oh, the remote told us (http transport done against
 454                 # new style repository with a symref HEAD).
 455                 # Ideally we should skip the guesswork but for now
 456                 # opt for minimum change.
 457                 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 458                 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 459                 ;;
 460         esac
 461
 462         # The name under $remote_top the remote HEAD seems to point at.
 463         head_points_at=$(
 464                 (
 465                         test -f "$GIT_DIR/$remote_top/master" && echo "master"
 466                         cd "$GIT_DIR/$remote_top" &&
 467                         find . -type f -print | sed -e 's/^\.\///'
 468                 ) | (
 469                 done=f
 470                 while read name
 471                 do
 472                         test t = $done && continue
 473                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 474                         if test "$head_sha1" = "$branch_tip"
 475                         then
 476                                 echo "$name"
 477                                 done=t
 478                         fi
 479                 done
 480                 )
 481         )
 482
 483         # Upstream URL
 484         git config remote."$origin".url "$repo" &&
 485
 486         # Set up the mappings to track the remote branches.
 487         git config remote."$origin".fetch \
 488                 "+refs/heads/*:$remote_top/*" '^$' &&
 489
 490         # Write out remote.$origin config, and update our "$head_points_at".
 491         case "$head_points_at" in
 492         ?*)
 493                 # Local default branch
 494                 git symbolic-ref HEAD "refs/heads/$head_points_at" &&
 495
 496                 # Tracking branch for the primary branch at the remote.
 497                 git update-ref HEAD "$head_sha1" &&
 498
 499                 rm -f "refs/remotes/$origin/HEAD"
 500                 git symbolic-ref "refs/remotes/$origin/HEAD" \
 501                         "refs/remotes/$origin/$head_points_at" &&
 502
 503                 git config branch."$head_points_at".remote "$origin" &&
 504                 git config branch."$head_points_at".merge "refs/heads/$head_points_at"
 505                 ;;
 506         '')
 507                 # Source had detached HEAD pointing nowhere
 508                 git update-ref --no-deref HEAD "$head_sha1" &&
 509                 rm -f "refs/remotes/$origin/HEAD"
 510                 ;;
 511         esac
 512
 513         case "$no_checkout" in
 514         '')
 515                 test "z$quiet" = z -a "z$no_progress" = z && v=-v || v=
 516                 git read-tree -m -u $v HEAD HEAD
 517         esac
 518 fi
 519 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 520
 521 trap - 0