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