Add color to bin/gen error messages

type: development

Cargo.lock

@@ -358,6 +358,7 @@ checksum = "2fad85553e09a6f881f739c29f0b00b0f01357c743266d478b68951ce23285f3"
 name = "gen"
 version = "0.0.0"
 dependencies = [
+ "ansi_term 0.12.1",
  "askama",
  "cargo_toml",
  "chrono",

bin/gen/Cargo.toml

@@ -6,6 +6,7 @@ edition = "2018"
 publish = false
 
 [dependencies]
+ansi_term         = "0.12.1"
 askama            = "0.9.0"
 cargo_toml        = "0.8.0"
 chrono            = "0.4.11"
@@ -13,6 +14,7 @@ fehler            = "1.0.0"
 git2              = "0.13.1"
 globset           = "0.4.5"
 ignore            = "0.4.14"
+lexiclean         = "0.0.1"
 libc              = "0.2.69"
 log               = "0.4.8"
 pretty_env_logger = "0.4.0"
@@ -24,7 +26,6 @@ strum             = "0.18.0"
 strum_macros      = "0.18.0"
 tempfile          = "3.1.0"
 walkdir           = "2.3.1"
-lexiclean         = "0.0.1"
 
 [dependencies.serde]
 version  = "1.0.106"

bin/gen/src/common.rs

@@ -11,6 +11,7 @@ pub(crate) use std::{
   str,
 };
 
+pub(crate) use ansi_term::Style;
 pub(crate) use askama::Template;
 pub(crate) use cargo_toml::Manifest;
 pub(crate) use chrono::{DateTime, NaiveDateTime, Utc};

bin/gen/src/main.rs

@@ -34,7 +34,9 @@ fn main() {
   pretty_env_logger::init();
 
   if let Err(error) = Opt::from_args().run() {
-    eprintln!("{}", error);
+    let bold = Style::new().bold();
+    let red = Style::new().fg(ansi_term::Color::Red).bold();
+    eprintln!("{}: {}", red.paint("error"), bold.paint(error.to_string()));
     process::exit(EXIT_FAILURE);
   }
 }