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