fix: pass exit codes with usage bash and usage exec

Fixes #149

cli/src/cli/bash.rs

@@ -57,7 +57,11 @@ impl Bash {
             cmd.env(key, val);
         }
 
-        cmd.spawn().into_diagnostic()?.wait().into_diagnostic()?;
+        let result = cmd.spawn().into_diagnostic()?.wait().into_diagnostic()?;
+
+        if !result.success() {
+            std::process::exit(result.code().unwrap_or(1));
+        }
 
         Ok(())
     }

cli/src/cli/exec.rs

@@ -8,7 +8,7 @@ use miette::IntoDiagnostic;
 use usage::Spec;
 
 #[derive(Debug, Args)]
-#[clap(visible_alias = "x")]
+#[clap(visible_alias = "x", hide = true)]
 pub struct Exec {
     /// command to execute after parsing usage spec
     command: String,
@@ -53,7 +53,11 @@ impl Exec {
             cmd.env(key, val);
         }
 
-        cmd.spawn().into_diagnostic()?.wait().into_diagnostic()?;
+        let result = cmd.spawn().into_diagnostic()?.wait().into_diagnostic()?;
+
+        if !result.success() {
+            std::process::exit(result.code().unwrap_or(1));
+        }
 
         Ok(())
     }

cli/src/lib.rs

@@ -38,5 +38,13 @@ pub fn run(args: &[String]) -> Result<()> {
             }
         }
     }
-    Cli::run(args)
+    let result = Cli::run(args);
+    if let Err(err) = &result {
+        if let Some(_err) = err.downcast_ref::<usage::error::UsageErr>() {
+            eprintln!("{err:?}");
+            std::process::exit(181);
+        }
+    };
+
+    result
 }