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         (cd "$1" && (cd .git ; pwd)) 2> /dev/null
  22 }
  23
  24 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
  25     curl_extra_args="-k"
  26 fi
  27
  28 http_fetch () {
  29         # $1 = Remote, $2 = Local
  30         curl -nsfL $curl_extra_args "$1" >"$2"
  31 }
  32
  33 clone_dumb_http () {
  34         # $1 - remote, $2 - local
  35         cd "$2" &&
  36         clone_tmp="$GIT_DIR/clone-tmp" &&
  37         mkdir -p "$clone_tmp" || exit 1
  38         if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
  39                 "`git-config --bool http.noEPSV`" = true ]; then
  40                 curl_extra_args="${curl_extra_args} --disable-epsv"
  41         fi
  42         http_fetch "$1/info/refs" "$clone_tmp/refs" ||
  43                 die "Cannot get remote repository information.
  44 Perhaps git-update-server-info needs to be run there?"
  45         test "z$quiet" = z && v=-v || v=
  46         while read sha1 refname
  47         do
  48                 name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
  49                 case "$name" in
  50                 *^*)    continue;;
  51                 esac
  52                 case "$bare,$name" in
  53                 yes,* | ,heads/* | ,tags/*) ;;
  54                 *)      continue ;;
  55                 esac
  56                 if test -n "$use_separate_remote" &&
  57                    branch_name=`expr "z$name" : 'zheads/\(.*\)'`
  58                 then
  59                         tname="remotes/$origin/$branch_name"
  60                 else
  61                         tname=$name
  62                 fi
  63                 git-http-fetch $v -a -w "$tname" "$sha1" "$1" || exit 1
  64         done <"$clone_tmp/refs"
  65         rm -fr "$clone_tmp"
  66         http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
  67         rm -f "$GIT_DIR/REMOTE_HEAD"
  68 }
  69
  70 quiet=
  71 local=no
  72 use_local=no
  73 local_shared=no
  74 unset template
  75 no_checkout=
  76 upload_pack=
  77 bare=
  78 reference=
  79 origin=
  80 origin_override=
  81 use_separate_remote=t
  82 depth=
  83 no_progress=
  84 test -t 1 || no_progress=--no-progress
  85 while
  86         case "$#,$1" in
  87         0,*) break ;;
  88         *,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
  89         *,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
  90           no_checkout=yes ;;
  91         *,--na|*,--nak|*,--nake|*,--naked|\
  92         *,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
  93         *,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
  94         *,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
  95           local_shared=yes; use_local=yes ;;
  96         1,--template) usage ;;
  97         *,--template)
  98                 shift; template="--template=$1" ;;
  99         *,--template=*)
 100           template="$1" ;;
 101         *,-q|*,--quiet) quiet=-q ;;
 102         *,--use-separate-remote) ;;
 103         *,--no-separate-remote)
 104                 die "clones are always made with separate-remote layout" ;;
 105         1,--reference) usage ;;
 106         *,--reference)
 107                 shift; reference="$1" ;;
 108         *,--reference=*)
 109                 reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
 110         *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
 111                 case "$2" in
 112                 '')
 113                     usage ;;
 114                 */*)
 115                     die "'$2' is not suitable for an origin name"
 116                 esac
 117                 git-check-ref-format "heads/$2" ||
 118                     die "'$2' is not suitable for a branch name"
 119                 test -z "$origin_override" ||
 120                     die "Do not give more than one --origin options."
 121                 origin_override=yes
 122                 origin="$2"; shift
 123                 ;;
 124         1,-u|1,--upload-pack) usage ;;
 125         *,-u|*,--upload-pack)
 126                 shift
 127                 upload_pack="--upload-pack=$1" ;;
 128         *,--upload-pack=*)
 129                 upload_pack=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
 130         1,--depth) usage;;
 131         *,--depth)
 132                 shift
 133                 depth="--depth=$1";;
 134         *,-*) usage ;;
 135         *) break ;;
 136         esac
 137 do
 138         shift
 139 done
 140
 141 repo="$1"
 142 test -n "$repo" ||
 143     die 'you must specify a repository to clone.'
 144
 145 # --bare implies --no-checkout and --no-separate-remote
 146 if test yes = "$bare"
 147 then
 148         if test yes = "$origin_override"
 149         then
 150                 die '--bare and --origin $origin options are incompatible.'
 151         fi
 152         no_checkout=yes
 153         use_separate_remote=
 154 fi
 155
 156 if test -z "$origin"
 157 then
 158         origin=origin
 159 fi
 160
 161 # Turn the source into an absolute path if
 162 # it is local
 163 if base=$(get_repo_base "$repo"); then
 164         repo="$base"
 165         local=yes
 166 fi
 167
 168 dir="$2"
 169 # Try using "humanish" part of source repo if user didn't specify one
 170 [ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 171 [ -e "$dir" ] && die "destination directory '$dir' already exists."
 172 mkdir -p "$dir" &&
 173 D=$(cd "$dir" && pwd) &&
 174 trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
 175 case "$bare" in
 176 yes)
 177         GIT_DIR="$D" ;;
 178 *)
 179         GIT_DIR="$D/.git" ;;
 180 esac && export GIT_DIR && git-init ${template+"$template"} || usage
 181
 182 if test -n "$reference"
 183 then
 184         ref_git=
 185         if test -d "$reference"
 186         then
 187                 if test -d "$reference/.git/objects"
 188                 then
 189                         ref_git="$reference/.git"
 190                 elif test -d "$reference/objects"
 191                 then
 192                         ref_git="$reference"
 193                 fi
 194         fi
 195         if test -n "$ref_git"
 196         then
 197                 ref_git=$(cd "$ref_git" && pwd)
 198                 echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
 199                 (
 200                         GIT_DIR="$ref_git" git for-each-ref \
 201                                 --format='%(objectname) %(*objectname)'
 202                 ) |
 203                 while read a b
 204                 do
 205                         test -z "$a" ||
 206                         git update-ref "refs/reference-tmp/$a" "$a"
 207                         test -z "$b" ||
 208                         git update-ref "refs/reference-tmp/$b" "$b"
 209                 done
 210         else
 211                 die "reference repository '$reference' is not a local directory."
 212         fi
 213 fi
 214
 215 rm -f "$GIT_DIR/CLONE_HEAD"
 216
 217 # We do local magic only when the user tells us to.
 218 case "$local,$use_local" in
 219 yes,yes)
 220         ( cd "$repo/objects" ) ||
 221                 die "-l flag seen but repository '$repo' is not local."
 222
 223         case "$local_shared" in
 224         no)
 225             # See if we can hardlink and drop "l" if not.
 226             sample_file=$(cd "$repo" && \
 227                           find objects -type f -print | sed -e 1q)
 228
 229             # objects directory should not be empty since we are cloning!
 230             test -f "$repo/$sample_file" || exit
 231
 232             l=
 233             if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
 234             then
 235                     l=l
 236             fi &&
 237             rm -f "$GIT_DIR/objects/sample" &&
 238             cd "$repo" &&
 239             find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
 240             ;;
 241         yes)
 242             mkdir -p "$GIT_DIR/objects/info"
 243             echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
 244             ;;
 245         esac
 246         git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 247         ;;
 248 *)
 249         case "$repo" in
 250         rsync://*)
 251                 case "$depth" in
 252                 "") ;;
 253                 *) die "shallow over rsync not supported" ;;
 254                 esac
 255                 rsync $quiet -av --ignore-existing  \
 256                         --exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
 257                 exit
 258                 # Look at objects/info/alternates for rsync -- http will
 259                 # support it natively and git native ones will do it on the
 260                 # remote end.  Not having that file is not a crime.
 261                 rsync -q "$repo/objects/info/alternates" \
 262                         "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 263                         rm -f "$GIT_DIR/TMP_ALT"
 264                 if test -f "$GIT_DIR/TMP_ALT"
 265                 then
 266                     ( cd "$D" &&
 267                       . git-parse-remote &&
 268                       resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
 269                     while read alt
 270                     do
 271                         case "$alt" in 'bad alternate: '*) die "$alt";; esac
 272                         case "$quiet" in
 273                         '')     echo >&2 "Getting alternate: $alt" ;;
 274                         esac
 275                         rsync $quiet -av --ignore-existing  \
 276                             --exclude info "$alt" "$GIT_DIR/objects" || exit
 277                     done
 278                     rm -f "$GIT_DIR/TMP_ALT"
 279                 fi
 280                 git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
 281                 ;;
 282         https://*|http://*|ftp://*)
 283                 case "$depth" in
 284                 "") ;;
 285                 *) die "shallow over http or ftp not supported" ;;
 286                 esac
 287                 if test -z "@@NO_CURL@@"
 288                 then
 289                         clone_dumb_http "$repo" "$D"
 290                 else
 291                         die "http transport not supported, rebuild Git with curl support"
 292                 fi
 293                 ;;
 294         *)
 295                 case "$upload_pack" in
 296                 '') git-fetch-pack --all -k $quiet $depth $no_progress "$repo";;
 297                 *) git-fetch-pack --all -k $quiet "$upload_pack" $depth $no_progress "$repo" ;;
 298                 esac >"$GIT_DIR/CLONE_HEAD" ||
 299                         die "fetch-pack from '$repo' failed."
 300                 ;;
 301         esac
 302         ;;
 303 esac
 304 test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
 305
 306 if test -f "$GIT_DIR/CLONE_HEAD"
 307 then
 308         # Read git-fetch-pack -k output and store the remote branches.
 309         if [ -n "$use_separate_remote" ]
 310         then
 311                 branch_top="remotes/$origin"
 312         else
 313                 branch_top="heads"
 314         fi
 315         tag_top="tags"
 316         while read sha1 name
 317         do
 318                 case "$name" in
 319                 *'^{}')
 320                         continue ;;
 321                 HEAD)
 322                         destname="REMOTE_HEAD" ;;
 323                 refs/heads/*)
 324                         destname="refs/$branch_top/${name#refs/heads/}" ;;
 325                 refs/tags/*)
 326                         destname="refs/$tag_top/${name#refs/tags/}" ;;
 327                 *)
 328                         continue ;;
 329                 esac
 330                 git-update-ref -m "clone: from $repo" "$destname" "$sha1" ""
 331         done < "$GIT_DIR/CLONE_HEAD"
 332 fi
 333
 334 cd "$D" || exit
 335
 336 if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
 337 then
 338         # a non-bare repository is always in separate-remote layout
 339         remote_top="refs/remotes/$origin"
 340         head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
 341         case "$head_sha1" in
 342         'ref: refs/'*)
 343                 # Uh-oh, the remote told us (http transport done against
 344                 # new style repository with a symref HEAD).
 345                 # Ideally we should skip the guesswork but for now
 346                 # opt for minimum change.
 347                 head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
 348                 head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
 349                 ;;
 350         esac
 351
 352         # The name under $remote_top the remote HEAD seems to point at.
 353         head_points_at=$(
 354                 (
 355                         test -f "$GIT_DIR/$remote_top/master" && echo "master"
 356                         cd "$GIT_DIR/$remote_top" &&
 357                         find . -type f -print | sed -e 's/^\.\///'
 358                 ) | (
 359                 done=f
 360                 while read name
 361                 do
 362                         test t = $done && continue
 363                         branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
 364                         if test "$head_sha1" = "$branch_tip"
 365                         then
 366                                 echo "$name"
 367                                 done=t
 368                         fi
 369                 done
 370                 )
 371         )
 372
 373         # Write out remote.$origin config, and update our "$head_points_at".
 374         case "$head_points_at" in
 375         ?*)
 376                 # Local default branch
 377                 git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
 378
 379                 # Tracking branch for the primary branch at the remote.
 380                 origin_track="$remote_top/$head_points_at" &&
 381                 git-update-ref HEAD "$head_sha1" &&
 382
 383                 # Upstream URL
 384                 git-config remote."$origin".url "$repo" &&
 385
 386                 # Set up the mappings to track the remote branches.
 387                 git-config remote."$origin".fetch \
 388                         "+refs/heads/*:$remote_top/*" '^$' &&
 389                 rm -f "refs/remotes/$origin/HEAD"
 390                 git-symbolic-ref "refs/remotes/$origin/HEAD" \
 391                         "refs/remotes/$origin/$head_points_at" &&
 392
 393                 git-config branch."$head_points_at".remote "$origin" &&
 394                 git-config branch."$head_points_at".merge "refs/heads/$head_points_at"
 395         esac
 396
 397         case "$no_checkout" in
 398         '')
 399                 test "z$quiet" = z -a "z$no_progress" = z && v=-v || v=
 400                 git-read-tree -m -u $v HEAD HEAD
 401         esac
 402 fi
 403 rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
 404
 405 trap - 0
 406