logging level got at runtime from envvar 'RUST_LOG'

src/main.rs

@@ -52,11 +52,22 @@ cfg_if!{
 
 type Pointer = *const Never;
 
-fn install() -> eyre::Result<()>
+/// Install things and get other things
+fn install() -> eyre::Result<(progress::logging::Level,)>
 {
+    let logv = std::env::var("RUST_LOG");
     color_eyre::install()?;
 
-    Ok(())
+    let lv = match logv {
+	Ok(log) if log.trim().len() !=0 => log.parse().unwrap_or_else(|e| {
+	    let def = Default::default();
+	    eprintln!("Failed to parse logging level, using default `{:?}`: {}", def, e);
+	    def
+	}),
+	_ => Default::default(),
+    };
+    
+    Ok((lv,))
 }
 
 /// Currently a mock impl for process
@@ -113,7 +124,7 @@ async fn validate_config(config: config::Config) -> eyre::Result<config::Config>
 async fn begin() -> eyre::Result<i32>
 {
     use futures::prelude::*;
-    install()?;
+    let (log_level,) = install()?;
     {
 	let (progress, progress_join) = {
 	    let bar = termprogress::progress::Bar::new(50);
@@ -132,10 +143,7 @@ async fn begin() -> eyre::Result<i32>
 	let state = {
 	    use progress::logging;
 	    let mut logger = logging::Logger::new(progress,
-						  logging::Level::Info); //TODO: Get level from env var
+						  log_level); 
-
-	    //let task_id = progress.send_command_and_downcast(progress::CommandKind::AddTask("Task name".to_owned())).await?.unwrap();
-	    //progress.send_command_and_wait(progress::CommandKind::AddTask("Task 2 name".to_owned())).await?;
 
 	    let state = Arc::new(state::State::new(validate_config(config::Config::default()).await
 						   .wrap_err(eyre!("Failed to validate config"))?,
@@ -154,7 +162,6 @@ async fn begin() -> eyre::Result<i32>
 	{
 	    args::usage();
 	}
-	//progress.send_command_and_wait(progress::CommandKind::RemoveTask(task_id)).await?;
 
 	//Cleanup deferred in new `async` block to drop `state` before this block is ran.
 	async move {

src/progress/logging.rs

@@ -1,5 +1,10 @@
 //! Logging 
 use super::*;
+use std::{
+    str,
+    fmt,
+    error,
+};
 
 /// The logging level
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -28,6 +33,36 @@ impl fmt::Display for Level
     }
 }
 
+impl str::FromStr for Level
+{
+    type Err = LevelParseError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+	let s = s.trim().to_lowercase();
+	Ok(match s.as_str() {
+	    "trace" => Level::Trace,
+	    "debug" => Level::Debug,
+	    "info" => Level::Info,
+	    "warning" => Level::Warning,
+	    "error" => Level::Error,
+	    "fatal" => Level::Fatal,
+	    _ => return Err(LevelParseError(s)),
+	})
+    }
+}
+
+#[derive(Debug)]
+pub struct LevelParseError(String);
+
+impl error::Error for LevelParseError{}
+impl fmt::Display for LevelParseError
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
+    {
+	write!(f, "{:?} is not a valid logging level", self.0)
+    }
+}
+
 
 impl Level
 {