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