fix and check compilation with no features

.github/workflows/ci.yml

@@ -42,6 +42,9 @@ jobs:
         with:
           key: ${{ matrix.TARGET }}
 
+      - run: cargo check --target ${{ matrix.TARGET }} --no-default-features
+        env:
+          RUSTFLAGS: -D warnings
       - run: cargo check --target ${{ matrix.TARGET }}
         env:
           RUSTFLAGS: -D warnings

src/config.rs

@@ -37,6 +37,7 @@ pub struct Config {
     pub base_address_shift: u64,
     pub html_url: Option<url::Url>,
     /// Path to YAML file with chip-specific settings
+    #[cfg(feature = "yaml")]
     pub settings: Option<PathBuf>,
 }
 

src/generate/device.rs

@@ -28,13 +28,16 @@ pub fn render(d: &Device, config: &Config, device_x: &mut String) -> Result<Toke
         }
     };
 
+    #[cfg(feature = "yaml")]
     let settings = match config.settings.as_ref() {
         Some(settings) => {
             let file = std::fs::read_to_string(settings).context("could not read settings file")?;
             Some(serde_yaml::from_str(&file).context("could not parse settings file")?)
         }
         None => None,
     };
+    #[cfg(not(feature = "yaml"))]
+    let settings = None;
 
     if config.target == Target::Msp430 {
         out.extend(quote! {