push config option

src/cli.rs

@@ -24,6 +24,15 @@ pub fn build_cli() -> Command {
                 .help("Number of threads to use")
                 .num_args(1)
         )
+        .arg(
+            Arg::new("config")
+                .long("config")
+                .help("Specify a config file to use")
+                .value_name("FILE")
+                .value_hint(clap::ValueHint::FilePath)
+                .value_parser(value_parser!(String))
+                .num_args(1)
+        )
         .arg(
             Arg::new("number_of_lines")
                 .short('n')
@@ -47,7 +56,7 @@ pub fn build_cli() -> Command {
                 .value_name("PATH")
                 .value_hint(clap::ValueHint::AnyPath)
                 .action(clap::ArgAction::Append)
-                .help("Exclude any file or directory with this name"),
+                .help("Exclude any file or directory with this path"),
         )
         .arg(
             Arg::new("ignore_all_in_file")

src/config.rs

@@ -15,7 +15,6 @@ pub static DAY_SECONDS: i64 = 24 * 60 * 60;
 
 #[derive(Deserialize, Default)]
 #[serde(rename_all = "kebab-case")]
-#[serde(deny_unknown_fields)]
 pub struct Config {
     pub display_full_paths: Option<bool>,
     pub display_apparent_size: Option<bool>,
@@ -254,12 +253,30 @@ fn get_config_locations(base: &Path) -> Vec<PathBuf> {
     ]
 }
 
-pub fn get_config() -> Config {
-    if let Some(home) = directories::BaseDirs::new() {
-        for path in get_config_locations(home.home_dir()) {
+pub fn get_config(conf_path: Option<String>) -> Config {
+    match conf_path {
+        Some(path_str) => {
+            let path = Path::new(&path_str);
             if path.exists() {
-                if let Ok(config) = Config::from_config_file(path) {
-                    return config;
+                match Config::from_config_file(&path) {
+                    Ok(config) => return config,
+                    Err(e) => eprintln!(
+                        "Ignoring invalid config file ({}): {:?}",
+                        &path.display(),
+                        e
+                    ),
+                }
+            }
+            eprintln!("Config file {:?} doesn't exists", &path.display());
+        }
+        None => {
+            if let Some(home) = directories::BaseDirs::new() {
+                for path in get_config_locations(home.home_dir()) {
+                    if path.exists() {
+                        if let Ok(config) = Config::from_config_file(&path) {
+                            return config;
+                        }
+                    }
                 }
             }
         }

src/main.rs

@@ -112,7 +112,7 @@ fn get_regex_value(maybe_value: Option<ValuesRef<String>>) -> Vec<Regex> {
 
 fn main() {
     let options = build_cli().get_matches();
-    let config = get_config();
+    let config = get_config(options.get_one::<String>("config").cloned());
 
     let errors = RuntimeErrors::default();
     let error_listen_for_ctrlc = Arc::new(Mutex::new(errors));