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-rw-r--r--src/path.sh94
1 files changed, 94 insertions, 0 deletions
diff --git a/src/path.sh b/src/path.sh
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index 0000000..b1b1e8f
--- /dev/null
+++ b/src/path.sh
@@ -0,0 +1,94 @@
+# Copyright (c) 2016 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is part of the "Configuration file sharing" project.
+# For details, see https://github.com/egor-tensin/config-links.
+# Distributed under the MIT License.
+
+# Making sure paths point to files/directories
+
+_traverse_path_usage() {
+ local prefix="${FUNCNAME[0]}"
+ [ "${#FUNCNAME[@]}" -gt 1 ] && prefix="${FUNCNAME[1]}"
+
+ local msg
+ for msg; do
+ echo "$prefix: $msg"
+ done
+
+ echo "usage: $prefix [-h|--help] [-0|--null|-z|--zero] [-e|--exist] [-f|--file] [-d|--directory] [--] [PATH]..."
+}
+
+traverse_path() {
+ local -a paths=()
+
+ local must_exist=
+ local type_flag=
+ local type_name=
+
+ local fmt='%s\n'
+
+ while [ "$#" -gt 0 ]; do
+ local key="$1"
+ shift
+
+ case "$key" in
+ -h|--help)
+ _traverse_path_usage
+ return 0
+ ;;
+ -0|--null|-z|--zero)
+ fmt='%s\0'
+ ;;
+ --)
+ break
+ ;;
+ -e|--exist)
+ must_exist=1
+ ;;
+ -d|--directory)
+ type_flag=-d
+ type_name="directory"
+ ;;
+ -f|--file)
+ type_flag=-f
+ type_name="regular file"
+ ;;
+ -*)
+ _traverse_path_usage "unrecognized parameter: $key" >&2
+ return 1
+ ;;
+ *)
+ paths+=("$key")
+ ;;
+ esac
+ done
+
+ paths+=("$@")
+
+ [ "${#paths[@]}" -eq 0 ] && return 0
+
+ if is_cygwin; then
+ local i
+ for i in "${!paths[@]}"; do
+ paths[$i]="$( cygpath -- "${paths[$i]}" )"
+ done
+ fi
+
+ local -a abs_paths=()
+
+ local path
+ while IFS= read -d '' -r path; do
+ if [ -n "$must_exist" ] && [ ! -e "$path" ]; then
+ dump "must exist: $path" >&2
+ return 1
+ fi
+
+ if [ -e "$path" ] && [ -n "$type_flag" ] && ! test "$type_flag" "$path"; then
+ dump "must be a $type_name: $path" >&2
+ return 1
+ fi
+
+ abs_paths+=("$path")
+ done < <( readlink -z --canonicalize-missing -- ${paths[@]+"${paths[@]}"} )
+
+ printf -- "$fmt" ${abs_paths[@]+"${abs_paths[@]}"}
+}