feat: cli base

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/log.rs

@@ -0,0 +1,32 @@
+use log::LevelFilter;
+use log4rs::{
+    Config,
+    append::console::{ConsoleAppender, Target},
+    config::{Appender, Root},
+    encode::pattern::PatternEncoder,
+};
+
+pub fn init(quiet: bool, verbose: bool) -> Result<(), Box<dyn std::error::Error>> {
+    let level = if quiet {
+        LevelFilter::Warn
+    } else if verbose {
+        LevelFilter::Debug
+    } else {
+        LevelFilter::Info
+    };
+
+    let encoder = Box::new(PatternEncoder::new("{d} {h({l})} {M}::{L} - {m}{n}"));
+
+    let console = ConsoleAppender::builder()
+        .encoder(encoder)
+        .target(Target::Stderr)
+        .build();
+
+    let config = Config::builder()
+        .appender(Appender::builder().build("stderr", Box::new(console)))
+        .build(Root::builder().appender("stderr").build(level))?;
+
+    log4rs::init_config(config)?;
+
+    Ok(())
+}