Expose function for reading the configuration

src/lib.rs

@@ -10,10 +10,15 @@ mod rust;
 mod util;
 
 use std::error::Error;
-use std::fmt::Display;
 use std::path::Path;
 use configuration::Config;
 
+pub fn read_config_file<P: AsRef<Path>>(
+    config_file: P,
+) -> Result<Config, Box<Error>> {
+    configuration::parse(config_file)
+}
+
 pub fn generate_bindings(config: &Config) -> Result<(), Box<Error>> {
     cpp::write_header(config)?;
     cpp::write_cpp(config)?;
@@ -22,11 +27,11 @@ pub fn generate_bindings(config: &Config) -> Result<(), Box<Error>> {
     Ok(())
 }
 
-pub fn generate_bindings_from_config_file<P: AsRef<Path> + Display>(
+pub fn generate_bindings_from_config_file<P: AsRef<Path>>(
     config_file: P,
     overwrite_implementation: bool,
 ) -> Result<(), Box<Error>> {
-    let mut config = configuration::parse(config_file)?;
+    let mut config = read_config_file(config_file)?;
     if overwrite_implementation {
         config.overwrite_implementation = true;
     }

src/util.rs

@@ -8,6 +8,7 @@ pub fn write_if_different<P: AsRef<Path>>(path: P, contents: &[u8]) -> Result<()
     if old_contents.map(|c| c == contents).unwrap_or(false) {
         Ok(())
     } else {
+        let _ = fs::create_dir_all(path.as_ref().parent().unwrap());
         fs::write(path, contents)
     }
 }