contrib/workdir/git-new-workdir

   1 #!/bin/sh
   2
   3 usage () {
   4         echo "usage:" $@
   5         exit 127
   6 }
   7
   8 die () {
   9         echo $@
  10         exit 128
  11 }
  12
  13 failed () {
  14         die "unable to create new workdir '$new_workdir'!"
  15 }
  16
  17 if test $# -lt 2 || test $# -gt 3
  18 then
  19         usage "$0 <repository> <new_workdir> [<branch>]"
  20 fi
  21
  22 orig_git=$1
  23 new_workdir=$2
  24 branch=$3
  25
  26 # want to make sure that what is pointed to has a .git directory ...
  27 git_dir=$(cd "$orig_git" 2>/dev/null &&
  28   git rev-parse --git-dir 2>/dev/null) ||
  29   die "Not a git repository: \"$orig_git\""
  30
  31 case "$git_dir" in
  32 .git)
  33         git_dir="$orig_git/.git"
  34         ;;
  35 .)
  36         git_dir=$orig_git
  37         ;;
  38 esac
  39
  40 # don't link to a configured bare repository
  41 isbare=$(git --git-dir="$git_dir" config --bool --get core.bare)
  42 if test ztrue = "z$isbare"
  43 then
  44         die "\"$git_dir\" has core.bare set to true," \
  45                 " remove from \"$git_dir/config\" to use $0"
  46 fi
  47
  48 # don't link to a workdir
  49 if test -h "$git_dir/config"
  50 then
  51         die "\"$orig_git\" is a working directory only, please specify" \
  52                 "a complete repository."
  53 fi
  54
  55 # make sure the links in the workdir have full paths to the original repo
  56 git_dir=$(cd "$git_dir" && pwd) || exit 1
  57
  58 # don't recreate a workdir over an existing directory, unless it's empty
  59 if test -d "$new_workdir"
  60 then
  61         if test $(ls -a1 "$new_workdir/." | wc -l) -ne 2
  62         then
  63                 die "destination directory '$new_workdir' is not empty."
  64         fi
  65         cleandir="$new_workdir/.git"
  66 else
  67         cleandir="$new_workdir"
  68 fi
  69
  70 mkdir -p "$new_workdir/.git" || failed
  71 cleandir=$(cd "$cleandir" && pwd) || failed
  72
  73 cleanup () {
  74         rm -rf "$cleandir"
  75 }
  76 siglist="0 1 2 15"
  77 trap cleanup $siglist
  78
  79 # create the links to the original repo.  explicitly exclude index, HEAD and
  80 # logs/HEAD from the list since they are purely related to the current working
  81 # directory, and should not be shared.
  82 for x in config refs logs/refs objects info hooks packed-refs remotes rr-cache svn
  83 do
  84         # create a containing directory if needed
  85         case $x in
  86         */*)
  87                 mkdir -p "$new_workdir/.git/${x%/*}"
  88                 ;;
  89         esac
  90
  91         ln -s "$git_dir/$x" "$new_workdir/.git/$x" || failed
  92 done
  93
  94 # commands below this are run in the context of the new workdir
  95 cd "$new_workdir" || failed
  96
  97 # copy the HEAD from the original repository as a default branch
  98 cp "$git_dir/HEAD" .git/HEAD || failed
  99
 100 # the workdir is set up.  if the checkout fails, the user can fix it.
 101 trap - $siglist
 102
 103 # checkout the branch (either the same as HEAD from the original repository,
 104 # or the one that was asked for)
 105 git checkout -f $branch