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