feat(ruby): Configure when the module is shown (#2351)

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

docs/config/README.md

@@ -2162,7 +2162,7 @@ detect_extensions = []
 
 ## Ruby
 
-The `ruby` module shows the currently installed version of Ruby.
+By default the `ruby` module shows the currently installed version of Ruby.
 The module will be shown if any of the following conditions are met:
 
 - The current directory contains a `Gemfile` file
@@ -2171,12 +2171,15 @@ The module will be shown if any of the following conditions are met:
 
 ### Options
 
-| Option     | Default                            | Description                                      |
-| ---------- | ---------------------------------- | ------------------------------------------------ |
-| `format`   | `"via [$symbol($version )]($style)"` | The format for the module.                       |
-| `symbol`   | `"💎 "`                            | A format string representing the symbol of Ruby. |
-| `style`    | `"bold red"`                       | The style for the module.                        |
-| `disabled` | `false`                            | Disables the `ruby` module.                      |
+| Option              | Default                              | Description                                      |
+| ------------------- | ------------------------------------ | ------------------------------------------------ |
+| `format`            | `"via [$symbol($version )]($style)"` | The format for the module.                       |
+| `symbol`            | `"💎 "`                              | A format string representing the symbol of Ruby. |
+| `detect_extensions` | `["rb"]`                             | Which extensions should trigger this module.     |
+| `detect_files`      | `["Gemfile", ".ruby-version"]`       | Which filenames should trigger this module.      |
+| `detect_folders`    | `[]`                                 | Which folders should trigger this module.        |
+| `style`             | `"bold red"`                         | The style for the module.                        |
+| `disabled`          | `false`                              | Disables the `ruby` module.                      |
 
 ### Variables
 

src/configs/ruby.rs

@@ -8,6 +8,9 @@ pub struct RubyConfig<'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 RubyConfig<'a> {
@@ -17,6 +20,9 @@ impl<'a> RootModuleConfig<'a> for RubyConfig<'a> {
             symbol: "💎 ",
             style: "bold red",
             disabled: false,
+            detect_extensions: vec!["rb"],
+            detect_files: vec!["Gemfile", ".ruby-version"],
+            detect_folders: vec![],
         }
     }
 }

src/modules/ruby.rs

@@ -9,18 +9,20 @@ use crate::formatter::StringFormatter;
 ///     - Current directory contains a `.rb` file
 ///     - Current directory contains a `Gemfile` or `.ruby-version` file
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
+    let mut module = context.new_module("ruby");
+    let config = RubyConfig::try_load(module.config);
+
     let is_rb_project = context
         .try_begin_scan()?
-        .set_files(&["Gemfile", ".ruby-version"])
-        .set_extensions(&["rb"])
+        .set_files(&config.detect_files)
+        .set_extensions(&config.detect_extensions)
+        .set_folders(&config.detect_folders)
         .is_match();
 
     if !is_rb_project {
         return None;
     }
 
-    let mut module = context.new_module("ruby");
-    let config = RubyConfig::try_load(module.config);
     let parsed = StringFormatter::new(config.format).and_then(|formatter| {
         formatter
             .map_meta(|var, _| match var {