Tidy up file config init

src/config/file.rs

@@ -41,10 +41,42 @@ pub struct FileConfig {
     pub gid: Option<u32>,
     #[serde(default)]
     pub recursive_chown: bool,
+    #[serde(default)]
+    pub postinstall: bool,
 }
 
 // TODO: Rewrite impls
 impl FileConfig {
+    pub fn new_file(path: String, data: String) -> FileConfig {
+        FileConfig {
+            path,
+            data,
+            ..Default::default()
+        }
+    }
+
+    pub fn new_directory(path: String) -> FileConfig {
+        FileConfig {
+            path,
+            data: String::new(),
+            directory: true,
+            ..Default::default()
+        }
+    }
+
+    pub fn with_mod(&mut self, mode: u32, uid: u32, gid: u32) -> &mut FileConfig {
+        self.mode = Some(mode);
+        self.uid = Some(uid);
+        self.gid = Some(gid);
+        self
+    }
+
+    pub fn with_recursive_mod(&mut self, mode: u32, uid: u32, gid: u32) -> &mut FileConfig {
+        self.with_mod(mode, uid, gid);
+        self.recursive_chown = true;
+        self
+    }
+
     pub(crate) fn create<P: AsRef<Path>>(&self, prefix: P) -> Result<()> {
         let path = self.path.trim_start_matches('/');
         let target_file = prefix.as_ref().join(path);