[yabridgectl] Add an option to undo setting --path

CHANGELOG.md

@@ -66,6 +66,9 @@ TODO: Add an updated screenshot with some fancy VST3-only plugins to the readme
   `libyabridge-vst2.so` in this version, it's advised to carefully remove the
   old `libyabridge.so` and `yabridgectl` files before upgrading to avoid
   confusing situations.
+- Added the `yabridgectl set --path-auto` option to revert back to automatically
+  locating yabridge's files after manually setting a path with
+  `yabridgectl set --path=<...>`.
 
 ## [2.2.1] - 2020-12-12
 

tools/yabridgectl/src/actions.rs

@@ -137,6 +137,7 @@ pub fn show_status(config: &Config) -> Result<()> {
 pub struct SetOptions<'a> {
     pub method: Option<&'a str>,
     pub path: Option<PathBuf>,
+    pub path_auto: bool,
 }
 
 /// Change configuration settings. The actual options are defined in the clap [app](clap::App).
@@ -152,6 +153,10 @@ pub fn set_settings(config: &mut Config, options: &SetOptions) -> Result<()> {
         config.yabridge_home = Some(path.clone());
     }
 
+    if options.path_auto {
+        config.yabridge_home = None;
+    }
+
     config.write()
 }
 

tools/yabridgectl/src/main.rs

@@ -106,7 +106,17 @@ fn main() -> Result<()> {
                              '~/.local/share/yabridge' by default.",
                         )
                         .validator(validate_path)
-                        .takes_value(true),
+                        .takes_value(true).conflicts_with("path_auto"),
+                )
+                .arg(
+                    Arg::with_name("path_auto")
+                        .long("path-auto")
+                        .about("Automatically locate yabridge's files")
+                        .long_about(
+                            "Automatically locate yabridge's files. This can be used after manually \
+                             setting a path with the '--path' option to revert back to the default \
+                             auto detection behaviour.",
+                        )
                 ),
         )
         .subcommand(
@@ -166,6 +176,7 @@ fn main() -> Result<()> {
                     .value_of_t::<PathBuf>("path")
                     .ok()
                     .and_then(|path| path.canonicalize().ok()),
+                path_auto: options.is_present("path_auto"),
             },
         ),
         ("sync", Some(options)) => actions::do_sync(