Updated logger options, changed filetype behavior

Replaced lots of warns by errors

Filetype detection won’t return an error on unknown extension anymore,
but will return an `Other` value so it can be handled by other
functions not as an error already. See upcoming commits.

src/settings/utils.rs

@@ -1,5 +1,5 @@
 extern crate log;
-use log::{info, warn};
+use log::{info, error};
 
 use std::fs::File;
 use std::io::{Read, Result};
@@ -13,6 +13,10 @@ pub enum SettingsType {
 
     /// Files ending with the `json` extension
     Json,
+
+    /// Other file type, used to describe files without an extension or with an
+    /// unsupported extension
+    Other,
 }
 
 /// Read a file’s content into a `String`
@@ -27,7 +31,7 @@ pub fn read_file(path: &Path) -> Result<String> {
     let display = path.display();
     let mut file = match File::open(&path) {
         Err(why) => {
-            warn!("Could not read {}: {}", display, why.to_string());
+            error!("Could not read {}: {}", display, why.to_string());
             return Err(why);
         }
         Ok(file) => file,
@@ -35,7 +39,7 @@ pub fn read_file(path: &Path) -> Result<String> {
     let mut content = String::new();
     match file.read_to_string(&mut content) {
         Err(why) => {
-            warn!("Could not read {}: {}", display, why.to_string());
+            error!("Could not read {}: {}", display, why.to_string());
             return Err(why);
         }
         Ok(_) => {
@@ -61,14 +65,14 @@ where
     use std::io::prelude::*;
     let mut file = match File::create(&path) {
         Err(e) => {
-            warn!("Could not open file {}: {}", path.display(), e.to_string());
+            error!("Could not open file {}: {}", path.display(), e.to_string());
             return Err(e);
         }
         Ok(file) => file,
     };
     match file.write_all(content.to_string().as_bytes()) {
         Err(e) => {
-            warn!(
+            error!(
                 "Could not write settings to file {}: {}",
                 path.display(),
                 e.to_string()
@@ -97,24 +101,19 @@ where
 /// ```
 /// let file_json = std::path::Path::new("file.json");
 /// assert_eq!(lang_evolve_core::settings::utils::SettingsType::Json,
-///            lang_evolve_core::settings::utils::get_file_type(&file_json).unwrap());
+///            lang_evolve_core::settings::utils::get_file_type(&file_json));
 ///
 /// let file_yaml = std::path::Path::new("file.yaml");
 /// assert_eq!(lang_evolve_core::settings::utils::SettingsType::Yaml,
-///            lang_evolve_core::settings::utils::get_file_type(&file_yaml).unwrap());
+///            lang_evolve_core::settings::utils::get_file_type(&file_yaml));
 ///
 /// let file_yml = std::path::Path::new("file.yml");
 /// assert_eq!(lang_evolve_core::settings::utils::SettingsType::Yaml,
-///            lang_evolve_core::settings::utils::get_file_type(&file_yml).unwrap());
+///            lang_evolve_core::settings::utils::get_file_type(&file_yml));
 /// ```
-pub fn get_file_type(path: &Path) -> Result<SettingsType> {
+pub fn get_file_type(path: &Path) -> SettingsType {
     let extension = match path.extension() {
-        None => {
-            return Err(std::io::Error::new(
-                std::io::ErrorKind::InvalidInput,
-                "File has no extension",
-            ));
-        }
+        None => { return  SettingsType::Other; }
         Some(val) => val,
     };
     let extension = extension
@@ -122,11 +121,8 @@ pub fn get_file_type(path: &Path) -> Result<SettingsType> {
         .expect("Could not get String out of extension")
         .to_lowercase();
     match extension.as_str() {
-        "yml" | "yaml" => Ok(SettingsType::Yaml),
-        "json" => Ok(SettingsType::Json),
-        _ => Err(std::io::Error::new(
-            std::io::ErrorKind::InvalidInput,
-            "Invalid extension",
-        )),
+        "yml" | "yaml" => SettingsType::Yaml,
+        "json" => SettingsType::Json,
+        _ => SettingsType::Other,
     }
 }