Keep file contents in memory

src/files/commands.rs

@@ -424,6 +424,7 @@ pub enum Command {
 
 #[derive(Debug)]
 pub struct File {
+    pub contents: String,
     pub includes: Vec<String>,
     pub timezone: Option<String>,
     pub commands: Vec<Command>,

src/files/parse.rs

@@ -759,10 +759,11 @@ fn parse_command(p: Pair<'_, Rule>, file: &mut File) -> Result<()> {
     Ok(())
 }
 
-pub fn parse_file(p: Pair<'_, Rule>) -> Result<File> {
+pub fn parse_file(p: Pair<'_, Rule>, contents: String) -> Result<File> {
     assert_eq!(p.as_rule(), Rule::file);
 
     let mut file = File {
+        contents,
         includes: vec![],
         timezone: None,
         commands: vec![],
@@ -787,5 +788,5 @@ pub fn parse(path: &Path, input: &str) -> Result<File> {
     let file_pair = pairs.next().unwrap();
     assert_eq!(pairs.next(), None);
 
-    parse_file(file_pair).map_err(|e| e.with_path(&pathstr))
+    parse_file(file_pair, input.to_string()).map_err(|e| e.with_path(&pathstr))
 }