Updated bat config dir for MacOs

Removed directories crate and using dirs_rs
Changed bat config file and cache dir on MacOs:
config: ~/.config/bat/config
cache: ~/.config/bat/cache/

src/dirs.rs

@@ -1,6 +1,60 @@
-use directories::ProjectDirs;
+use dirs_rs;
+use std::path::{Path, PathBuf};
+
+/// Wrapper for dirs that uses `~/.config/bat` for MacOS.
+pub struct BatProjectDirs {
+    cache_dir: PathBuf,
+    config_dir: PathBuf,
+}
+
+impl BatProjectDirs {
+    fn new() -> Option<BatProjectDirs> {
+        #[cfg(target_os = "macos")]
+        let cache_dir = match dirs_rs::home_dir() {
+            Some(mut d) => {
+                d.push(".config/bat/cache");
+                d
+            }
+            None => return None,
+        };
+
+        #[cfg(not(target_os = "macos"))]
+        let cache_dir = match dirs_rs::cache_dir() {
+            Some(d) => d,
+            None => return None,
+        };
+
+        #[cfg(target_os = "macos")]
+        let config_dir = match dirs_rs::home_dir() {
+            Some(mut d) => {
+                d.push(".config/bat");
+                d
+            }
+            None => return None,
+        };
+
+        #[cfg(not(target_os = "macos"))]
+        let config_dir = match dirs_rs::config_dir() {
+            Some(d) => d,
+            None => return None,
+        };
+
+        Some(BatProjectDirs {
+            cache_dir,
+            config_dir,
+        })
+    }
+
+    pub fn cache_dir(&self) -> &Path {
+        &self.cache_dir
+    }
+
+    pub fn config_dir(&self) -> &Path {
+        &self.config_dir
+    }
+}
 
 lazy_static! {
-    pub static ref PROJECT_DIRS: ProjectDirs =
-        ProjectDirs::from("", "", crate_name!()).expect("Could not get home directory");
+    pub static ref PROJECT_DIRS: BatProjectDirs =
+        BatProjectDirs::new().expect("Could not get home directory");
 }

src/main.rs

@@ -14,7 +14,7 @@ extern crate ansi_term;
 extern crate atty;
 extern crate console;
 extern crate content_inspector;
-extern crate directories;
+extern crate dirs as dirs_rs;
 extern crate encoding;
 extern crate git2;
 extern crate shell_words;