Better logging.

Cargo.lock

@@ -151,6 +151,14 @@ dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "colored"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.5.1"
@@ -306,6 +314,7 @@ name = "fern"
 version = "0.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "colored 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1650,6 +1659,7 @@ dependencies = [
 "checksum chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "45912881121cb26fad7c38c17ba7daa18764771836b34fab7d3fbd93ed633878"
 "checksum clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"
 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
+"checksum colored 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6e9a455e156a4271e12fd0246238c380b1e223e3736663c7a18ed8b6362028a9"
 "checksum core-foundation 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "286e0b41c3a20da26536c6000a280585d519fd07b3956b43aed8a79e9edce980"
 "checksum core-foundation-sys 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "716c271e8613ace48344f723b60b900a93150271e5be206212d052bbc0883efa"
 "checksum crc32fast 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e91d5240c6975ef33aeb5f148f35275c25eda8e8a5f95abe421978b05b8bf192"

Cargo.toml

@@ -8,7 +8,7 @@ edition = "2018"
 bincode = "1.0"
 chrono = { version = "0.4", features = ["serde"] }
 directories = "1.0"
-fern = "0.5"
+fern = { version = "0.5", features = ["colored"] }
 log = "0.4"
 regex = "1.1"
 reqwest = "0.9"

src/main.rs

@@ -1,5 +1,6 @@
 use std::process::Command;
 
+use fern::colors::{Color, ColoredLevelConfig};
 use structopt::StructOpt;
 
 mod context;
@@ -11,6 +12,9 @@ use crate::probe::*;
 #[derive(Debug, StructOpt)]
 #[structopt(name = "whoareyou", about = "Search for swedish phone numbers.")]
 struct Opt {
+    #[structopt(short = "v", parse(from_occurrences))]
+    verbose: u8,
+
     #[structopt(short = "o", long = "open")]
     open: bool,
 
@@ -20,25 +24,38 @@ struct Opt {
 fn main() {
     let opt = Opt::from_args();
 
-    fern::Dispatch::new()
-        .format(|out, message, record| {
+    let colors = ColoredLevelConfig::new()
+        .error(Color::Red)
+        .warn(Color::Yellow)
+        .info(Color::White)
+        .debug(Color::White)
+        .trace(Color::BrightBlack);
+
+    let mut config = fern::Dispatch::new()
+        .format(move |out, message, record| {
             out.finish(format_args!(
                 "{}[{}][{}] {}",
                 chrono::Local::now().format("[%Y-%m-%d %H:%M:%S]"),
                 record.target(),
-                record.level(),
+                colors.color(record.level()),
                 message
             ))
         })
-        .level(log::LevelFilter::Off)
         .level_for("reqwest", log::LevelFilter::Off)
         .level_for("hyper", log::LevelFilter::Off)
         .level_for("tokio_reactor", log::LevelFilter::Off)
         .level_for("html5ever", log::LevelFilter::Off)
         .level_for("selectors", log::LevelFilter::Off)
-        .chain(std::io::stdout())
-        .apply()
-        .expect("failed to init fern");
+        .chain(std::io::stdout());
+
+    config = match opt.verbose {
+        0 => config.level(log::LevelFilter::Info),
+        1 => config.level(log::LevelFilter::Debug),
+        2 => config.level(log::LevelFilter::Debug),
+        _ => config.level(log::LevelFilter::Trace),
+    };
+
+    config.apply().expect("failed to init fern");
 
     let mut probes: Vec<Box<Probe>> = vec![
         Box::new(Eniro),