core: significant rework to config subsystem

This change hammers out a bunch of details and changes the form of
the config from being a hashmap based on a primary name to just
being a list.  There is some gymnastics in order to properly parse
the toml to a form that has the deafults filled out and such.  This
should make using the resultant GpioConfig easier for other parts
of the system.

Signed-off-by: Paul Osborne <[email protected]>

Author: posborne

Cargo.lock

@@ -9,6 +9,8 @@ rustc-serialize = "0.3"
 sysfs_gpio = "0.4"
 toml = "0.1"
 glob = "0.2"
+log = "0.3"
+env_logger = "0.3"
 
 [[bin]]
 name = "gpio"

Cargo.toml

@@ -0,0 +1,19 @@
+// Copyright (C) 2016, Paul Osborne <[email protected]>
+
+use options::{GpioExportAllOptions};
+use config::GpioConfig;
+use std::process::exit;
+
+pub fn main(opts: &GpioExportAllOptions) {
+    let config = match GpioConfig::load(&opts.gpio_opts.configs[..]) {
+        Ok(config) => config,
+        Err(e) => {
+            println!("Error: {:?}", e);
+            exit(1);
+        }
+    };
+
+    for pin in config.pins {
+        println!("{:?}", pin);
+    }
+}

src/commands/gpio_exportall.rs

@@ -1,7 +1,17 @@
 // Copyright (C) 2016, Paul Osborne <[email protected]>
 
 use options::{GpioReadOptions};
+use config::GpioConfig;
+use std::process::exit;
 
 pub fn main(opts: &GpioReadOptions) {
-    println!("{:?}", opts);
+    let config = match GpioConfig::load(&opts.gpio_opts.configs[..]) {
+        Ok(config) => config,
+        Err(e) => {
+            println!("Error: {:?}", e);
+            exit(1);
+        }
+    };
+
+    println!("config: {:?}", config);
 }

src/commands/gpio_read.rs

@@ -1,3 +1,4 @@
 // Copyright (C) 2016, Paul Osborne <[email protected]>
 
 pub mod gpio_read;
+pub mod gpio_exportall;