Begin implemetation of config parser

Cargo.lock

@@ -533,6 +533,7 @@ dependencies = [
  "bytes",
  "fnv",
  "lazy_static",
+ "memchr",
  "mio",
  "num_cpus",
  "pin-project-lite",

Cargo.toml

@@ -12,7 +12,7 @@ default = ["threaded"]
 threaded = ["tokio/rt-threaded"]
 
 [dependencies]
-tokio = {version = "0.2", features=["time", "macros", "io-driver", "sync", "rt-core"]}
+tokio = {version = "0.2", features=["time", "macros", "io-driver", "sync", "rt-core", "fs"]}
 notify = "4.0"
 futures= "0.3"
 sexp = "1.1"

src/config/error.rs

@@ -2,13 +2,16 @@
 use super::*;
 use std::{
     io,
+    path::PathBuf,
 };
 
 #[derive(Debug)]
 pub enum Error {
     IO(io::Error),
     Syntax(sexp::Error),
-
+    NotFound(PathBuf),
+    InvalidUtf8,
+    InvalidSexp,
     Unknown,
 }
 
@@ -30,7 +33,9 @@ impl std::fmt::Display for Error
 	match self {
 	    Self::IO(io) => write!(f, "i/o error: {}", io),
 	    Self::Syntax(sy) => write!(f, "s-expression syntax error: {}", sy),
-	    
+                    Self::NotFound(path) => write!(f, "File not found: {:?}", path),
+	    Self::InvalidUtf8 => write!(f, "Invalid UTF8 decoded string or some such"),
+                    Self::InvalidSexp => write!(f, "Invalid s-expression"),
 	    _ => write!(f, "unknown error")
 	}
     }
@@ -59,3 +64,11 @@ impl From<Box<sexp::Error>> for Error
         Self::Syntax(*from)
     }
 }
+
+impl From<std::str::Utf8Error> for Error
+{
+    fn from(from: std::str::Utf8Error) -> Self
+    {
+        Self::InvalidUtf8
+    }
+}

src/config/global.rs

@@ -33,6 +33,8 @@ pub struct Config
     pub job_dirs: Vec<PathBuf>,
     /// The rules for users
     pub user_rules: Vec<UserRule>,
+		/// Enable debug
+		pub debug: bool,
 }
 
 impl Default for Config
@@ -40,6 +42,6 @@ impl Default for Config
     #[inline]
     fn default() -> Self
     {
-	Self{job_dirs: Vec::new(), user_rules: Vec::new()}
+	Self{job_dirs: Vec::new(), user_rules: Vec::new(), debug: false}
     }
 }

src/config/job.rs

@@ -40,5 +40,4 @@ pub struct Job
     what: Command,
 }
 
-
 const DEFAULT_JOB_DIR: &str = "/etc/rori.kron";

src/config/mod.rs

@@ -20,9 +20,9 @@ pub use global::*;
 
 /// Parse a single config file
 #[inline]
-pub fn parse_global_single(path: impl AsRef<Path>) -> Result<Config, error::Error>
+pub async fn parse_global_single(path: impl AsRef<Path>) -> Result<Config, error::Error>
 {
     let mut cfg = Config::default();
-    parse::global(&mut cfg, path)?;
+    parse::global(&mut cfg, path).await?;
     Ok(cfg)
 }

src/config/parse.rs

@@ -1,10 +1,74 @@
 //! Parses the config files
 use super::*;
 
+use tokio::fs::File;
+use tokio::prelude::*;
+use sexp::{
+    parse,
+    Sexp,
+    Atom,
+};
+
+fn get_atom_string<'a, T>(maybe_atom: T) -> Result<&'a String, Error>
+where T: AsRef<Sexp> + 'a
+{
+    match maybe_atom.as_ref() {
+        Sexp::Atom(Atom::S(string)) => Ok(string),
+        _ => Err(Error::InvalidSexp),
+    }
+}
+
+fn new_job(to: &mut Config, cdr: &[Sexp]) -> Result<(), Error> {
+    to.job_dirs.push(PathBuf::from(get_atom_string(&cdr[0])?));
+    
+    Ok(())
+}
+
 /// Parse a single config file
-pub fn global(to: &mut Config, path: impl AsRef<Path>) -> Result<(), error::Error>
+pub async fn global(to: &mut Config, path: impl AsRef<Path>) -> Result<(), error::Error>
 {
     let path = path.as_ref();
 
-    todo!();
+    if path.exists() {
+        let mut file = File::open(path).await?;
+        let mut contents = vec![];
+        file.read_to_end(&mut contents).await?;
+
+        let parsed = sexp::parse(std::str::from_utf8(&contents[..])?)?;
+
+        if let Sexp::List(sexp) = parsed {
+            for sexp in sexp.into_iter() {
+                if let Sexp::List(sexp) = sexp {
+                    
+                    let car = &sexp[0];
+                    let cdr = &sexp[1..];
+                    match car {
+                        Sexp::List(_) => return Err(Error::InvalidSexp),
+                        Sexp::Atom(car) => {
+                            if let Atom::S(car) = car {
+                                match car.to_lowercase().trim() {
+                                    "jobs-dir" => new_job(to, cdr),
+                                    "debug" => new_job(to, cdr),
+                                    "allow" => new_job(to, cdr),
+                                    "deny" => new_job(to, cdr),
+                                    _ => return Err(Error::Unknown),
+                                }?;
+                            } else {
+                                return Err(Error::InvalidSexp);
+                            }
+                        }
+                    }
+                }
+                else {
+                    return Err(Error::InvalidSexp);
+                }
+            }
+        } else {
+            return Err(Error::InvalidSexp);
+        }
+        
+        Ok(())
+    } else {
+        return Err(Error::NotFound(path.to_owned()));
+    }
 }

src/main.rs

@@ -62,12 +62,14 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     
     debug!("Initialised");
 
-    let (mut tx, h) = do_thing_every().await?;
+    println!("{:?}", config::parse_global_single("/home/manx/flon.txt").await.expect("Waaaaaah"));
     
-    loop {
-	time::delay_for(Duration::from_secs(6)).await;
-	tx.send(()).await?;
-    }
-    h.await?;
+    //let (mut tx, h) = do_thing_every().await?;
+
+  //   loop {
+	// time::delay_for(Duration::from_secs(6)).await;
+	// tx.send(()).await?;
+  //   }
+  //   h.await?;
     Ok(())
 }