UPDATED: f function. Proceeding to test

data/features/f/f.sh

@@ -1,31 +1,83 @@
 #!/usr/bin/env bash
+
 f()
 {
-  if  [ $# -eq 0 ]; then  # No arguments given
-    find . 2>/dev/null
-  elif [ $# -eq 1 ]; then
-    if [ -f "$1" ]; then  # Searches therm in a file
-      cat "$1"
-    elif [ -d "$1" ]; then  # Searches files in directory
-      find "$1"
-    else
-      more ./* | grep "$1"  # Searches therm in all files
-    fi
-  elif [ $# -gt 1 ]; then
-    local temp="$1"
-    while [ $# -gt 1 ]; do
-      if [ -f "$temp" ]; then  # Searches therm in a file
-        more "$temp" | grep "$2"
-      elif [ -d "$temp" ]; then  # Searches file in directory
-        if [ -n "$(find "$temp" -name "$2")" ]; then  # Show files matching argument
-          more $(find "$temp" -name "$2")
+  default_ignored_dirs=("node_modules" ".git")
+  find_ignored_dirs_shell_command=""
+  # Since we expect f to be called as a binary in the PATH, we can expect the working directory to be the same that
+  # we are using f against
+  skip_defaults="false"
+  ignore_all_levels="true"
+  find_dir=""
+  custom_command=""
+
+  # Process arguments
+  while [ -n "$1" ]; do
+    case "$1" in
+      "--skip-defaults" | "-s")
+        skip_defaults="true"
+      ;;
+      "--ignore-all" | "-i")
+        ignore_all_levels="true"
+      ;;
+      "--literal" | "-l")
+        ignore_all_levels="false"
+      ;;
+      "--dir" | "-d" | "--dir-exclude")
+        if [ $# -eq 1 ]; then
+          echo "ERROR: the \"$1\" option needs to be followed by another argument"
+          exit 3
+        fi
+        shift
+        if [ "${ignore_all_levels}" = "true" ]; then
+          find_ignored_dirs_shell_command+=" -o -path ./'*'/$1/'*'"
         else
-          ls -lah "$temp" | grep "$2"  # Show list of other matching files in elements of directory
+          find_ignored_dirs_shell_command+=" -o -path ./$1/'*'"
         fi
-      else  # Literal search in therm
-        echo "$temp" | grep "$2"
+      ;;
+      "--custom" | "-c" | "--custom-command")
+        if [ $# -eq 1 ]; then
+          echo "ERROR: the \"$1\" option needs to be followed by another argument"
+          exit 4
+        fi
+        shift
+        custom_command="$1"
+      ;;
+
+      *)  # Error
+        if [ $# -eq 1 ]; then  # If only one argument this is the last argument and means that is the search dir
+          find_dir="$1"
+        else
+          echo "ERROR: \"$1\" not recognized argument. Aborting..."
+          exit 1
+        fi
+      ;;
+    esac
+    shift
+  done
+
+  # Remove the space and the -o from the beginning of the ignored dirs
+  find_ignored_dirs_shell_command="${find_ignored_dirs_shell_command:3}"
+
+  # Add the default ignored paths depending on the state of the flag
+  if [ "${skip_defaults}" = "false" ]; then
+    for dir in "${default_ignored_dirs[@]}"; do
+      if [ "${ignore_all_levels}" = "true" ]; then
+        find_ignored_dirs_shell_command+=" -o -path ./'*'/${dir}/'*'"
+      else
+        find_ignored_dirs_shell_command+=" -o -path ./${dir}/'*'"
       fi
-      shift
     done
   fi
+
+  if [ -z "${find_dir}" ]; then
+    find_dir="."
+  else
+    if [ ! -d "${find_dir}" ]; then
+      echo "ERROR: \"${find_dir}\" is not a valid directory. Aborting..."
+      exit 2
+    fi
+  fi
+
+  find "${find_dir}" -type f -not \( ${find_ignored_dirs_shell_command} \) 2>/dev/null
 }