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="$D/.git"
 216 fi &&
 217 export GIT_DIR &&
 218 GIT_CONFIG="$GIT_DIR/config" git-init $quiet ${template+"$template"} || usage
 219
 220 if test -n "$bare"
 221 then
 222         GIT_CONFIG="$GIT_DIR/config" git config core.bare true
 223 fi
 224
 225 if test -n "$reference"
 226 then
 227         ref_git=
 228         if test -d "$reference"
 229         then
 230                 if test -d "$reference/.git/objects"
 231                 then
 232                         ref_git="$reference/.git"
 233                 elif test -d "$reference/objects"
 234                 then
 235                         ref_git="$reference"
 236                 fi
 237         fi
 238         if test -n "$ref_git"
 239         then
 240                 ref_git=$(cd "$ref_git" && pwd)
 241                 echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
 242                 (
 243                         GIT_DIR="$ref_git" git for-each-ref \
 244                                 --format='%(objectname) %(*objectname)'
 245                 ) |
 246                 while read a b
 247                 do
 248                         test -z "$a" ||
 249                         git update-ref "refs/reference-tmp/$a" "$a"
 250                         test -z "$b" ||
 251                         git update-ref "refs/reference-tmp/$b" "$b"
 252                 done
 253         else
 254                 die "reference repository '$reference' is not a local directory."
 255         fi
 256 fi
 257
 258 rm -f "$GIT_DIR/CLONE_HEAD"
 259
 260 # We do local magic only when the user tells us to.
 261 case "$local" in
 262 yes)
 263         ( cd "$repo/objects" ) ||
 264                 die "cannot chdir to local '$repo/objects'."
 265
 266         if test "$local_shared" = yes
 267         then
 268                 mkdir -p "$GIT_DIR/objects/info"
 269                 echo "$repo/objects" >>"$GIT_DIR/objects/info/alternates"
 270         else
 271                 l= &&
 272                 if test "$use_local_hardlink" = yes
 273                 then
 274                         # See if we can hardlink and drop "l" if not.
 275                         sample_file=$(cd "$repo" && \
 276                                       find objects -type f -print | sed -e 1q)
 277                         # objects directory should not be empty because
 278                         # we are cloning!
 279                         test -f "$repo/$sample_file" || exit
 280                         if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 281                         then
 282                                 rm -f "$GIT_DIR/objects/sample"
 283                                 l=l
 284                         else
 285                                 echo >&2 "Warning: -l asked but cannot hardlink to $repo"
 286                         fi
 287                 fi &&
 288                 cd "$repo" &&
 289                 find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 290         fi
 291         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 292         ;;
 293 *)
 294         case "$repo" in
 295         rsync://*)
 296                 case "$depth" in
 297                 "") ;;
 298                 *) die "shallow over rsync not supported" ;;
 299                 esac
 300                 rsync $quiet -av --ignore-existing  \
 301                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 302                 exit
 303                 # Look at objects/info/alternates for rsync -- http will
 304                 # support it natively and git native ones will do it on the
 305                 # remote end.  Not having that file is not a crime.
 306                 rsync -q "$repo/objects/info/alternates" \
 307                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 308                         rm -f "$GIT_DIR/TMP_ALT"
 309                 if test -f "$GIT_DIR/TMP_ALT"
 310                 then
 311                     ( cd "$D" &&
 312                       . git-parse-remote &&
 313                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 314                     while read alt
 315                     do
 316                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 317                         case "$quiet" in
 318                         '')     echo >&2 "Getting alternate: $alt" ;;
 319                         esac
 320                         rsync $quiet -av --ignore-existing  \
 321                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 322                     done
 323                     rm -f "$GIT_DIR/TMP_ALT"
 324                 fi
 325                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 326                 ;;
 327         https://*|http://*|ftp://*)
 328                 case "$depth" in
 329                 "") ;;
 330                 *) die "shallow over http or ftp not supported" ;;
 331                 esac
 332                 if test -z "@@NO_CURL@@"
 333                 then
 334                         clone_dumb_http "$repo" "$D"
 335                 else
 336                         die "http transport not supported, rebuild Git with curl support"
 337                 fi
 338                 ;;
 339         *)
 340                 case "$upload_pack" in
 341                 '') git-fetch-pack --all -k $quiet $depth $no_progress "$repo";;
 342                 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth $no_progress "$repo" ;;
 343                 esac >"$GIT_DIR/CLONE_HEAD" ||
 344                         die "fetch-pack from '$repo' failed."
 345                 ;;
 346         esac
 347         ;;
 348 esac
 349 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 350
 351 if test -f "$GIT_DIR/CLONE_HEAD"
 352 then
 353         # Read git-fetch-pack -k output and store the remote branches.
 354         if [ -n "$use_separate_remote" ]
 355         then
 356                 branch_top="remotes/$origin"
 357         else
 358                 branch_top="heads"
 359         fi
 360         tag_top="tags"
 361         while read sha1 name
 362         do
 363                 case "$name" in
 364                 *'^{}')
 365                         continue ;;
 366                 HEAD)
 367                         destname="REMOTE_HEAD" ;;
 368                 refs/heads/*)
 369                         destname="refs/$branch_top/${name#refs/heads/}" ;;
 370                 refs/tags/*)
 371                         destname="refs/$tag_top/${name#refs/tags/}" ;;
 372                 *)
 373                         continue ;;
 374                 esac
 375                 git update-ref -m "clone: from $repo" "$destname" "$sha1" ""
 376         done < "$GIT_DIR/CLONE_HEAD"
 377 fi
 378
 379 if test -n "$W"; then
 380         cd "$W" || exit
 381 else
 382         cd "$D" || exit
 383 fi
 384
 385 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 386 then
 387         # a non-bare repository is always in separate-remote layout
 388         remote_top="refs/remotes/$origin"
 389         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 390         case "$head_sha1" in
 391         'ref: refs/'*)
 392                 # Uh-oh, the remote told us (http transport done against
 393                 # new style repository with a symref HEAD).
 394                 # Ideally we should skip the guesswork but for now
 395                 # opt for minimum change.
 396                 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 397                 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 398                 ;;
 399         esac
 400
 401         # The name under $remote_top the remote HEAD seems to point at.
 402         head_points_at=$(
 403                 (
 404                         test -f "$GIT_DIR/$remote_top/master" && echo "master"
 405                         cd "$GIT_DIR/$remote_top" &&
 406                         find . -type f -print | sed -e 's/^\.\///'
 407                 ) | (
 408                 done=f
 409                 while read name
 410                 do
 411                         test t = $done && continue
 412                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 413                         if test "$head_sha1" = "$branch_tip"
 414                         then
 415                                 echo "$name"
 416                                 done=t
 417                         fi
 418                 done
 419                 )
 420         )
 421
 422         # Upstream URL
 423         git config remote."$origin".url "$repo" &&
 424
 425         # Set up the mappings to track the remote branches.
 426         git config remote."$origin".fetch \
 427                 "+refs/heads/*:$remote_top/*" '^$' &&
 428
 429         # Write out remote.$origin config, and update our "$head_points_at".
 430         case "$head_points_at" in
 431         ?*)
 432                 # Local default branch
 433                 git symbolic-ref HEAD "refs/heads/$head_points_at" &&
 434
 435                 # Tracking branch for the primary branch at the remote.
 436                 git update-ref HEAD "$head_sha1" &&
 437
 438                 rm -f "refs/remotes/$origin/HEAD"
 439                 git symbolic-ref "refs/remotes/$origin/HEAD" \
 440                         "refs/remotes/$origin/$head_points_at" &&
 441
 442                 git config branch."$head_points_at".remote "$origin" &&
 443                 git config branch."$head_points_at".merge "refs/heads/$head_points_at"
 444                 ;;
 445         '')
 446                 # Source had detached HEAD pointing nowhere
 447                 git update-ref --no-deref HEAD "$head_sha1" &&
 448                 rm -f "refs/remotes/$origin/HEAD"
 449                 ;;
 450         esac
 451
 452         case "$no_checkout" in
 453         '')
 454                 test "z$quiet" = z -a "z$no_progress" = z && v=-v || v=
 455                 git read-tree -m -u $v HEAD HEAD
 456         esac
 457 fi
 458 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 459
 460 trap - 0