feat(swift): Configure when the module is shown (#2349)

This makes it possible to configure when the swift module is shown
based on the contents of a directory.

docs/config/README.md

@@ -2412,7 +2412,7 @@ disabled = false
 
 ## Swift
 
-The `swift` module shows the currently installed version of Swift.
+By default the `swift` module shows the currently installed version of Swift.
 The module will be shown if any of the following conditions are met:
 
 - The current directory contains a `Package.swift` file
@@ -2421,9 +2421,12 @@ The module will be shown if any of the following conditions are met:
 ### Options
 
 | Option              | Default                              | Description                                      |
-| ---------- | ------------------------------------ | ------------------------------------------------ |
+| ------------------- | ------------------------------------ | ------------------------------------------------ |
 | `format`            | `"via [$symbol($version )]($style)"` | The format for the module.                       |
 | `symbol`            | `"🐦 "`                              | A format string representing the symbol of Swift |
+| `detect_extensions` | `["swift"]`                          | Which extensions should trigger this moudle.     |
+| `detect_files`      | `["Package.swift"]`                  | Which filenames should trigger this module.      |
+| `detect_folders`    | `[]`                                 | Which folders should trigger this module.        |
 | `style`             | `"bold 202"`                         | The style for the module.                        |
 | `disabled`          | `false`                              | Disables the `swift` module.                     |
 

src/configs/swift.rs

@@ -8,6 +8,9 @@ pub struct SwiftConfig<'a> {
     pub symbol: &'a str,
     pub style: &'a str,
     pub disabled: bool,
+    pub detect_extensions: Vec<&'a str>,
+    pub detect_files: Vec<&'a str>,
+    pub detect_folders: Vec<&'a str>,
 }
 
 impl<'a> RootModuleConfig<'a> for SwiftConfig<'a> {
@@ -17,6 +20,9 @@ impl<'a> RootModuleConfig<'a> for SwiftConfig<'a> {
             symbol: "🐦 ",
             style: "bold 202",
             disabled: false,
+            detect_extensions: vec!["swift"],
+            detect_files: vec!["Package.swift"],
+            detect_folders: vec![],
         }
     }
 }

src/modules/swift.rs

@@ -4,23 +4,21 @@ use crate::configs::swift::SwiftConfig;
 use crate::formatter::StringFormatter;
 
 /// Creates a module with the current Swift version
-///
-/// Will display the Swift version if any of the following criteria are met:
-///     - The current directory contains a `Package.swift` file
-///     - The current directory contains a file with extension `.swift`
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
+    let mut module = context.new_module("swift");
+    let config: SwiftConfig = SwiftConfig::try_load(module.config);
+
     let is_swift_project = context
         .try_begin_scan()?
-        .set_extensions(&["swift"])
+        .set_files(&config.detect_files)
+        .set_folders(&config.detect_folders)
+        .set_extensions(&config.detect_extensions)
         .is_match();
 
     if !is_swift_project {
         return None;
     }
 
-    let mut module = context.new_module("swift");
-    let config: SwiftConfig = SwiftConfig::try_load(module.config);
-
     let parsed = StringFormatter::new(config.format).and_then(|formatter| {
         formatter
             .map_meta(|var, _| match var {