bashrc: Added an autosource function that allows us to source other files similar to how you would import python modules

.dotfiles/bash_functions/autosource.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+function autosource {
+  # Test if 1 argument was given
+  if (( $# == 0 )); then
+    echo "autosource: basename of a file in BASH_FUNC_PATH required"
+    echo "autosource: usage: autosource basename [arguments]"
+    return 1
+  fi
+
+  # Split the BASH_FUNC_PATH into an array of directory names
+  IFS=: read -ra bash_function_dirs <<< "${BASH_FUNC_PATH}"
+
+  # Look for a .sh file with the basename given as first argument in each direc-
+  # tory in each directory in turn
+  for bash_function_dir in "${bash_function_dirs[@]}"; do
+    if [[ -r "${bash_function_dir}/${1}.sh" ]]; then
+
+      # If we find a matching file, source it and skip the rest of this function
+      . "${bash_function_dir}/${1}.sh" ${@:2}
+      return
+    fi
+  done
+
+  # If the loop completes no matching file is in BASH_FUNC_PATH
+  echo "autosource: no ${1} in (${BASH_FUNC_PATH})"
+  return 1
+}