Add colored output to most tools; Make mkoverlay more tolerant for missing overlay files; Make psxcdgen_ex emit a warning when no license file is specified

src/Tools/tool_helper/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tool_helper"
-version = "0.7.0"
+version = "0.8.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 byteorder  = "*"
 cdtypes    = {path = "../cdtypes"}
+colored    = "*"
 envmnt     = "*"
 lz4        = "*"
 paste      = "*"

src/Tools/tool_helper/src/lib.rs

@@ -1,5 +1,6 @@
-use std::{boxed::Box, io::{BufReader, BufWriter, Read, Write}, path::PathBuf};
+use colored::*;
 use envmnt::{ExpandOptions, ExpansionType};
+use std::{boxed::Box, io::{BufReader, BufWriter, Read, Write}, path::PathBuf};
 
 pub mod bits;
 pub mod compress;
@@ -79,6 +80,14 @@ impl Error {
     pub fn ok_or_new<T, F>(option: Option<T>, error_text: F) -> Result<T, Error> where F: Fn () -> String{
         Ok(option.ok_or(Error::from_callback(error_text))?)
     }
+
+    pub fn print_generic_to_std_err<T: std::fmt::Display>(object: &T) {
+        eprintln!("{}", format!("ERROR: {}", object).red());
+    }
+
+    pub fn print_to_std_err(&self) {
+        Self::print_generic_to_std_err(self)
+    }
 }
 
 impl std::fmt::Display for Error {
@@ -105,6 +114,11 @@ impl std::convert::From<std::convert::Infallible> for Error {
     }
 }
 
+pub fn exit_with_error(error: Error) {
+    error.print_to_std_err();
+    std::process::exit(error.exit_code);
+}
+
 pub fn prefix_if_error<T>(prefix: &str, result: Result<T, Error>) -> Result<T, Error> {
     match result {
         Ok(value)      => Ok(value),