being wonk is fine actually

example.rori

@@ -1,7 +1,6 @@
-((jobs-dir "/etc/rori.kron")
+(jobs-dir "/etc/rori.kron")
- (debug t)
+(debug t)
- (allow
+(allow :all)
-  :all)
+(deny
- (deny
+ (:user "flon")
-  (:user "flon")
+ (:uid 8008))
-  (:uid 8008)))

src/config/error.rs

@@ -5,16 +5,30 @@ use std::{
     path::PathBuf,
 };
 
+
+//TODO: Embed info about the file, the line number, the expression, etc?
+/// Error type for parsing config errors
 #[derive(Debug)]
 pub enum Error {
+
+    /// Internal IO error
     IO(io::Error),
+    /// S-expression syntax error
     Syntax(sexp::Error),
+
+    /// File not found, or was a directory
     NotFound(PathBuf),
+    /// File contained invalid UTF-8
     InvalidUtf8,
+    /// Invalid or unexpected type
     TypeError{expected:LispType, got: LispType},
+    /// Expected a list with at least one element
     UnexpectedEmpty,
+    
+    /// Unknown definition string
     UnknownDefinition(String),
 
+    /// Non-descript other error
     Unknown,
 }
 

src/config/format.rs

@@ -13,6 +13,8 @@ pub enum LispType
     String,
     Integer,
     Float,
+
+    /// A non-descript atom, either String, Integer, Float, or the empty list.
     Atom,
 }
 
@@ -85,7 +87,7 @@ impl std::fmt::Display for LispType
 	    Self::String => "string",
 	    Self::Integer => "integer",
 	    Self::Float => "float",
-	    Self::Atom => "atom",
+	    Self::Atom => "nil",
 	})
     }
 }

src/config/parse.rs

@@ -2,10 +2,12 @@
 use super::*;
 use std::{
     convert::TryFrom,
+    marker::Unpin,
 };
 use tokio::{
     prelude::*,
     fs::File,
+    io::AsyncRead,
 };
 use sexp::{
     Sexp,
@@ -61,11 +63,14 @@ pub async fn global(to: &mut Config, path: impl AsRef<Path>) -> Result<(), error
         let mut contents = if let Ok(Ok(wv)) = file.metadata().await
 	    .map(|x| x.len())
 	    .map(|x| usize::try_from(x)) {
-		Vec::with_capacity(wv)
+		let mut out = Vec::with_capacity(wv+3);
+		out.push(b'(');
+		out
 	    } else {
-		Vec::new()
+		vec![b'(']
 	    };
-        file.read_to_end(&mut contents).await?;
+	file.read_to_end(&mut contents).await?;
+	contents.push(b')');
 	
         let parsed = sexp::parse(std::str::from_utf8(&contents[..])?)?;