fix(CommandExt): invert success check

src/cli/build.rs

@@ -5,10 +5,6 @@ use owo_colors::OwoColorize as _;
 use crate::stages;
 use crate::util;
 
-fn default_nom() -> bool {
-    util::which("nom").is_some()
-}
-
 #[derive(Parser, Debug)]
 pub struct BuildCommand {
     /// Path to a flake
@@ -30,7 +26,7 @@ pub struct BuildCommand {
 
 impl super::Command for BuildCommand {
     fn action(&self, _global_options: &super::Cli) -> Result<()> {
-        let build_program = if self.nom.unwrap_or_else(default_nom) {
+        let build_program = if self.nom.unwrap_or_else(util::nom_available) {
             "nom"
         } else {
             "nix"

src/cli/switch.rs

@@ -9,14 +9,6 @@ fn default_profile() -> String {
     "/nix/var/nix/profiles/system".to_owned()
 }
 
-fn default_nom() -> bool {
-    util::which("nom").is_some()
-}
-
-fn default_nvd() -> bool {
-    util::which("nvd").is_some()
-}
-
 #[derive(Parser, Debug)]
 #[allow(clippy::struct_excessive_bools)]
 pub struct SwitchCommand {
@@ -51,7 +43,7 @@ pub struct SwitchCommand {
 
 impl super::Command for SwitchCommand {
     fn action(&self, _global_options: &super::Cli) -> Result<()> {
-        let build_program = if self.nom.unwrap_or_else(default_nom) {
+        let build_program = if self.nom.unwrap_or_else(util::nom_available) {
             "nom"
         } else {
             "nix"
@@ -82,7 +74,7 @@ impl super::Command for SwitchCommand {
 
         util::log::success(out.display().dimmed());
 
-        if self.nvd.unwrap_or_else(default_nvd) {
+        if self.nvd.unwrap_or_else(util::nvd_available) {
             stages::diff(&out)?;
         }
 

src/util/command_ext.rs

@@ -1,4 +1,4 @@
-use eyre::{eyre, Result};
+use eyre::{Report, Result};
 
 pub trait CommandExt {
     fn error_for_status(&mut self, msg: &str) -> Result<std::process::Output>;
@@ -9,9 +9,9 @@ impl CommandExt for std::process::Command {
         let output = self.output()?;
 
         if output.status.success() {
-            Err(eyre!("{msg}"))
-        } else {
             Ok(output)
+        } else {
+            Err(Report::msg(msg.to_owned()))
         }
     }
 }

src/util/mod.rs

@@ -23,17 +23,20 @@ pub fn hostname() -> Result<String> {
 
 pub fn which(exe_name: impl AsRef<Path>) -> Option<PathBuf> {
     env::var_os("PATH").and_then(|paths| {
-        env::split_paths(&paths).find_map(|dir| {
-            let full_path = dir.join(&exe_name);
-            if full_path.is_file() {
-                Some(full_path)
-            } else {
-                None
-            }
-        })
+        env::split_paths(&paths)
+            .map(|d| d.join(&exe_name))
+            .find(|f| f.is_file())
     })
 }
 
+pub fn nom_available() -> bool {
+    which("nom").is_some()
+}
+
+pub fn nvd_available() -> bool {
+    which("nvd").is_some()
+}
+
 pub fn safe_remove_file(path: impl AsRef<Path>) -> Result<()> {
     match fs::remove_file(path) {
         Ok(()) => Ok(()),