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