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