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