Andrew's git - gitweb.git/blob - contrib/workdir/git-new-workdir

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