feat(unitproc/bkt-get_path_hierarchy_level):Add bash function

diff --git a/unitproc/bkt-get_path_hierarchy_level b/unitproc/bkt-get_path_hierarchy_level
new file mode 100755 (executable)
index 0000000..a76cb1f
--- /dev/null
+++ b/unitproc/bkt-get_path_hierarchy_level
@@ -0,0 +1,77 @@
+#!/bin/bash
+get_path_hierarchy_level() {
+    # Desc: Outputs hierarchy level of input paths
+    # Example: $ cat lines.txt | get_path_hierarchy_level
+    # Input: stdin    str  lines with /-delimited paths
+    # Output: stdout  int  hierarchy level of each path
+    # Version: 0.0.1
+
+    local line level;
+    local flag_root;
+    local -a output;
+
+    n=0;
+    while read -r line; do
+        # Check for mixed absolute/relative paths.
+        if [[ $n -le 0 ]] && [[ "$line" =~ ^/ ]]; then
+            flag_root=true;
+        else
+            flag_root=false;
+        fi;
+        if { [[ "$flag_root" == "true" ]] && [[ ! "$line" =~ ^/ ]]; } || \
+           { [[ "$flag_root" == "false" ]] && [[ "$line" =~ ^/ ]]; } then
+            echo "FATAL:Mixed relative and absolute paths not supported." 1>&2; return 1;
+        fi;
+        
+        # Squeeze multiple slashes and remove trailing slashes
+        line="$(echo "$line" | tr -s '/' | sed 's:/*$::' )";
+
+        # Count the number of slashes to determine hierarchy level
+        level="$(echo "$line" | awk -F'/' '{print NF-1}' )";
+        if [[ "$flag_root" == "true" ]]; then ((level--)); fi;
+
+        # Append to output
+        output+=("$level");
+        #declare -p flag_root level;
+        ((n++));
+    done;
+    # Print output
+    printf "%s\n" "${output[@]}";
+};
+
+# Test the function with the provided lines
+printf "\n\n========Test 1========\n"
+input_lines=(
+    "foo"
+    "foo/"
+    "foo/bar"
+    "foo/bar/"
+    "foo/bar///"
+    "foo///bar"
+    "/foo/bar/baz"
+    "/foo/bar/baz/"
+    "//foo/bar/baz////"
+);
+
+printf "%s\n" "${input_lines[@]}";
+printf "========Test 1 results:========\n";
+# Convert array to newline-separated string and pass to function
+printf "%s\n" "${input_lines[@]}" | get_path_hierarchy_level
+
+printf "\n\n========Test 2========\n"
+input_lines=(
+    "foo"
+    "foo/"
+    "foo/bar"
+    "foo/bar/"
+    "foo/bar///"
+    "foo///bar"
+    "foo/bar/baz"
+    "foo/bar/baz/"
+    "foo/bar/baz////"
+);
+
+printf "%s\n" "${input_lines[@]}";
+printf "========Test 2 results:========\n";
+# Convert array to newline-separated string and pass to function
+printf "%s\n" "${input_lines[@]}" | get_path_hierarchy_level