Add basic functionality:

- logging
- error handling
- configuration parsing

6 files changed, 457 insertions, 2 deletions

diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..43e2f0b
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,334 @@
+[root]
+name = "aklog-server"
+version = "0.1.0"
+dependencies = [
+ "clap 2.29.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "simplelog 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ansi_term"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "atty"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "backtrace"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "backtrace-sys 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "dbghelp-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-demangle 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "backtrace-sys"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cc"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "clap"
+version = "2.29.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ansi_term 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "textwrap 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vec_map 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "dbghelp-sys"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "dtoa"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "error-chain"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "backtrace 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "itoa"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "log"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "num-traits"
+version = "0.1.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "quote"
+version = "0.3.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "redox_termios"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "redox_syscall 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rustc-demangle"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "serde"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "serde_derive"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive_internals 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "serde_derive_internals"
+version = "0.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "simplelog"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "term 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "strsim"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "syn"
+version = "0.11.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "synom"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "term"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "termion"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "textwrap"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "time"
+version = "0.1.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "toml"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-width"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unicode-xid"
+version = "0.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "vec_map"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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diff --git a/Cargo.toml b/Cargo.toml
index 3587221..d5f0c80 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,4 +4,12 @@ name = "aklog-server"
 version = "0.1.0"
 
 [dependencies]
-clap = "2.*"
+clap = "2"
+error-chain = "0.11"
+log = "^0.3.8"
+serde = "1"
+serde_derive = "1"
+serde_json = "1"
+simplelog = "^0.4.3"
+toml = "^0.4"
+
diff --git a/example_config.toml b/example_config.toml
new file mode 100644
index 0000000..946a3d7
--- /dev/null
+++ b/example_config.toml
@@ -0,0 +1,6 @@
+
+[[item]]
+file = "/var/log/antikoerper/os.load"
+regex = "^(\\d{10,}) (\\d+\\.\\d\\d) (\\d+\\.\\d\\d) (\\d+\\.\\d\\d).*$"
+alias = "load"
+
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..5d1885c
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,42 @@
+//! Module for parsing/accessing the configuration
+
+extern crate log;
+extern crate toml;
+
+use std::fs::File;
+use std::io::Read;
+use error::*;
+
+/// Main Config struct
+#[derive(Debug, Deserialize)]
+pub struct Config {
+    item : Vec<Item>,
+}
+
+/// Holds data for one antikoerper Log-File
+#[derive(Debug, Deserialize)]
+struct Item {
+    file : String,
+    regex : String,
+    alias : String,
+}
+
+impl Config {
+    pub fn load(filename : String) -> Result<Config> {
+        debug!("configuration file name: '{}'", filename);
+        let mut file = File::open(filename.clone())
+            .chain_err(|| "configuration file could not be opened")?;
+        debug!("configuration file successfully opened");
+        let mut content = String::new();
+        file.read_to_string(&mut content)
+            .chain_err(|| "configuration file could not be read")?;
+        debug!("configuration file successfully read");
+        match toml::from_str(content.as_str()) {
+            Ok(config) => {
+                debug!("configuration file successfully parsed");
+                Ok(config)
+            },
+            _ => Err(ErrorKind::ConfigParseError(filename).into()),
+        }
+    }
+}
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..6258c10
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,10 @@
+
+error_chain! {
+    errors {
+        ConfigParseError(filename: String) {
+            description("configuration file could not be parsed"),
+            display("configuration file could not be parsed: '{}'", filename),
+        }
+    }
+}
+
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..4a4e53d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,58 @@
+#![recursion_limit = "1024"]
+
+extern crate clap;
+#[macro_use]
+extern crate error_chain;
+#[macro_use]
+extern crate log;
+#[macro_use]
+extern crate serde_derive;
+extern crate simplelog;
+
+use clap::{App, Arg};
+use simplelog::{SimpleLogger, LogLevelFilter, Config as LogConfig};
+
+use std::process::exit;
+
+mod error;
+mod config;
+use config::Config;
+
 fn main() {
-    println!("Hello, world!");
+    let matches = App::new("aklog-server")
+                        .version("0.1.0")
+                        .author("Mario Krehl <mario-krehl@gmx.de>")
+                        .about("Presents antikoerper-logfiles to grafana")
+                        .arg(Arg::with_name("config")
+                             .short("c")
+                             .long("config")
+                             .value_name("FILE")
+                             .help("configuration file to use")
+                             .takes_value(true)
+                             .required(true))
+                        .arg(Arg::with_name("verbosity")
+                             .short("v")
+                             .long("verbose")
+                             .help("sets the level of verbosity")
+                             .multiple(true))
+                        .get_matches();
+
+    match matches.occurrences_of("verbosity") {
+        0 => SimpleLogger::init(LogLevelFilter::Warn, LogConfig::default()).unwrap(),
+        1 => SimpleLogger::init(LogLevelFilter::Info, LogConfig::default()).unwrap(),
+        2 => SimpleLogger::init(LogLevelFilter::Debug, LogConfig::default()).unwrap(),
+        3 | _  => SimpleLogger::init(LogLevelFilter::Trace, LogConfig::default()).unwrap(),
+    };
+
+    debug!("Initialized logger");
+
+    let config_file = matches.value_of("config").unwrap();
+    let config = match Config::load(String::from(config_file)) {
+        Ok(c) => c,
+        Err(_) => {
+            error!("Failed to open/parse configuration file: '{}'", config_file);
+            exit(1);
+        },
+    };
+
 }