Move logging config to main configuration file.

- Move the content of what was stored in log4rs.yml into the main config
  file, so that there is just one file to parse to get the complete
  configuration.
- Create the global switch `--home` to pass/overload the value for
  SEQUOIA_HOME in the configuration file.

config/config.toml

@@ -5,6 +5,25 @@ connection = "localhost:3000"
 
 sequoia_home = "/tmp/sq_home"
 
-logfile_config = "./config/log4rs.yml"
+#keyservers = [ "hkps://keys.openpgp.org/", "hkps://mail-api.proton.me", "hkps://keys.mailvelope.com", "hkps://keyserver.ubuntu.com", "hkps://sks.pod01.fleetstreetops.com" ]
+keyservers = [ "hkp://example.com" ]
+
+[logging.appenders.console]
+kind = "console"
+[logging.appenders.console.encoder]
+pattern = "{d(%Y-%m-%d %H:%M:%S)(local)} {h({l})} [{t}] {m}{n}"
+
+[logging.appenders.file]
+kind = "file"
+path = "/tmp/husk.log"
+
+[logging.appenders.file.encoder]
+pattern = "{d(%Y-%m-%d %H:%M:%S)(local)} {h({l})} [{t}] {m}{n}"
+
+[logging.root]
+level = "debug"
+appenders = ["file"]
+
+[logging.loggers."husk"]
+level = "debug"
 
-keyservers = [ "hkps://keys.openpgp.org/", "hkps://mail-api.proton.me", "hkps://keys.mailvelope.com", "hkps://keyserver.ubuntu.com", "hkps://sks.pod01.fleetstreetops.com" ]

src/cli/cli_args.rs

@@ -15,6 +15,13 @@ pub struct CliArgs {
     )]
     pub config: Option<String>,
 
+    #[clap(
+        long,
+        global = true,
+        help = "Certification store (SEQUOIA_HOME).",
+    )]
+    pub home: Option<String>,
+
     #[clap(subcommand)]
     pub subcommand: HuskSubcommands,
 }

src/config.rs

@@ -3,27 +3,36 @@
 //
 
 use anyhow;
+
 use std::fs;
 use std::sync::{Arc, Mutex};
 use serde_derive::Deserialize;
+use toml;
+use log4rs;
 
 use crate::types::errors::HuskError;
+use crate::types::defaults::CONSOLE_LOGGING;
 
 #[derive(Deserialize, Debug, Clone)]
 pub struct HuskConfig {
     pub connection: String,
     pub sequoia_home: String,
-    logfile_config: Option<String>,
     pub keyservers: Option<Vec<String>>,
+    logging: Option<toml::Value>,
 }
 
 impl HuskConfig {
 
-    pub fn load(path: &str) -> anyhow::Result<Self> {
+    pub fn load(path: &str, home: Option<String>) -> anyhow::Result<Self> {
         match fs::read_to_string(path) {
             Ok(data) => {
-                match toml::from_str(data.as_str()) {
-                    Ok(configuration) => Ok(configuration),
+                match toml::from_str::<HuskConfig>(data.as_str()) {
+                    Ok(mut configuration) => {
+                        if let Some(home) = home {
+                            configuration.sequoia_home = home;
+                        }
+                        Ok(configuration)
+                    },
                     Err(e) => {
                         Err(HuskError::ConfigFileParseError(e.to_string()).into())
                     }
@@ -35,14 +44,19 @@ impl HuskConfig {
         }
     }
 
-    pub fn logfile_config(&self) -> String {
-        match &self.logfile_config {
-            Some(c) => c.clone(),
-            None => {
-                eprintln!("Using logging configuration from 'log4rs.yml'");
-                "log4rs.yml".to_string()
-            },
-        }
+    pub fn init_logging(&self) -> anyhow::Result<()> {
+        let config = match toml::to_string(&self.logging) {
+            Ok(c) => c,
+            Err(e) => {
+                eprintln!("use default logging, because {}", e);
+                eprintln!("{:?}", self.logging);
+                CONSOLE_LOGGING.to_string()
+            }
+        };
+        let raw_config = toml::from_str::<log4rs::config::RawConfig>(config.as_str())?;
+        log4rs::init_raw_config(raw_config)?;
+
+        Ok(())
     }
 
     pub fn get_keyservers(&self) -> Vec<String> {

src/main.rs

@@ -1,5 +1,6 @@
 //! Husk milter
 
+use anyhow;
 use std::process;
 use std::sync::{Arc, Mutex};
 
@@ -18,7 +19,7 @@ use daemon::Daemon;
 pub mod common;
 
 #[tokio::main]
-async fn main() {
+async fn main() -> anyhow::Result<()> {
     let args = CliArgs::parse();
 
     let config_file = match &args.config {
@@ -26,7 +27,8 @@ async fn main() {
         None => defaults::CONFIG_FILE_LOCATION
     };
 
-    let husk_config = match HuskConfig::load(config_file) {
+    // XXX: Improve the way cli parameters are passed into the configuration.
+    let husk_config = match HuskConfig::load(config_file, args.home.clone()) {
         Ok(config) => config,
         Err(e) => {
             eprintln!("{:?}", e);
@@ -34,14 +36,9 @@ async fn main() {
         }
     };
 
-    log4rs::init_file(husk_config.logfile_config(), Default::default()).unwrap();
-
-    log::info!("starting...");
+    husk_config.init_logging()?;
 
     let config_container: HuskConfigContainer = Arc::new(Mutex::new(husk_config));
 
-    if let Err(e) = commands::dispatch(args, config_container).await {
-        eprintln!("exit with {:?}", e);
-        // XXX: actually return an error code
-    }
+    commands::dispatch(args, config_container).await
 }

src/types/defaults.rs

@@ -1,3 +1,24 @@
 //! Defaults
 
 pub const CONFIG_FILE_LOCATION: &'static str = "/etc/husk/config.toml";
+
+/// Default logging configuration.
+pub const CONSOLE_LOGGING: &'static str = "
+[appenders.console]
+kind = \"console\"
+
+[appenders.console.encoder]
+pattern = \"{d(%Y-%m-%d %H:%M:%S)(local)} {h({l})} [{t}] {m}{n}\"
+
+[[appenders.console.filters]]
+kind = \"threshold\"
+level = \"debug\"
+
+[root]
+level = \"info\"
+appenders = [\"console\"]
+
+[loggers.\"husk\"]
+level = \"debug\"
+";
+