Reintroduce --with-linked-git option

With slightly different semantics:
Instead of pointing at a previous checkout,
point at base directory of all repos.

Change-Id: I254ecc33071be53067c44610b030f737cf75a7ee

1 files changed, 88 insertions, 0 deletions

diff --git a/bin/git-new-module-workdir b/bin/git-new-module-workdir
new file mode 100755
index 000000000000..bfad184a308d
--- /dev/null
+++ b/bin/git-new-module-workdir
@@ -0,0 +1,88 @@
+#!/bin/sh
+
+usage () {
+	echo "usage:" $@
+	exit 127
+}
+
+die () {
+	echo $@
+	exit 128
+}
+
+if test $# -lt 2 || test $# -gt 2
+then
+	usage "$0 <repository> <new_workdir>"
+fi
+
+orig_git=$1
+new_workdir=$2
+branch=$3
+
+# want to make sure that what is pointed to has a .git directory ...
+git_dir=$(cd "$orig_git" 2>/dev/null &&
+  git rev-parse --git-dir 2>/dev/null) ||
+  die "Not a git repository: \"$orig_git\""
+
+case "$git_dir" in
+.git)
+	git_dir="$orig_git/.git"
+	;;
+.)
+	git_dir=$orig_git
+	;;
+esac
+
+# don't link to a configured bare repository
+isbare=$(git --git-dir="$git_dir" config --bool --get core.bare)
+if test ztrue = z$isbare
+then
+	die "\"$git_dir\" has core.bare set to true," \
+		" remove from \"$git_dir/config\" to use $0"
+fi
+
+# don't link to a workdir
+if test -h "$git_dir/config"
+then
+	die "\"$orig_git\" is a working directory only, please specify" \
+		"a complete repository."
+fi
+
+if ! test -d ".git"
+then
+   die "the current directory is not a git workdir"
+fi
+
+# don't recreate a workdir over an existing repository
+if test -e "$new_workdir/.git"
+then
+	die "destination directory '$new_workdir' already exists."
+fi
+
+# make sure the links use full paths
+git_dir=$(cd "$git_dir"; pwd)
+
+# create the workdir
+mkdir -p ".git/modules/$new_workdir" || die "unable to create \".git/modules/$new_workdir\"!"
+
+# create the links to the original repo.  explicitly exclude index, HEAD and
+# logs/HEAD from the list since they are purely related to the current working
+# directory, and should not be shared.
+## LEM: add branches; deprecated, but safer to include it
+for x in branches config refs logs/refs objects info hooks packed-refs remotes rr-cache svn
+do
+	case $x in
+	*/*)
+		mkdir -p "$(dirname ".git/modules/$new_workdir/$x")"
+		;;
+	esac
+	ln -s "$git_dir/$x" ".git/modules/$new_workdir/$x"
+done
+
+# now setup the workdir
+mkdir -p "$new_workdir"
+cd "$new_workdir"
+echo "gitdir: ../.git/modules/$new_workdir" > .git
+# copy the HEAD from the original repository as a default branch
+cp "$git_dir/HEAD" ../.git/modules/$new_workdir/HEAD
+# don't checkout the branch, a subsequent "git module update" will do it