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#!/bin/bash
# Returns the longest subpath of the given path
# which includes a .subgitrc file.
usage() {
die $(cat <<-EOF
Usage: subgit root [PATH]
Finds the root of the subgit container by walking up from PATH
until finding a directory with a .subgitrc file. Returns the
absolute path to that directory.
EOF
)
}
while [ "$1" ]; do
case $1 in
-h) usage;;
--) shift; break;;
-*) die "Invalid option $1";;
*) break;;
esac
done
[ $# -gt 1 ] && usage
path=$(realpath -m "${1:-.}")
root=$path
while [ 1 ]; do
[ -f "$root/.subgitrc" ] && break
[ "$root" = "/" ] && die "Not a subgit repository"
root=$(dirname "$root")
done
echo "$root"
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