feat(ocaml): Configure when the module is shown (starship#2354)

This makes it possible to configure when the ocaml module is shown
based on the contents of a directory. This should make it possible to
be a lot more granular when configuring the module.

docs/config/README.md

@@ -1832,7 +1832,7 @@ format = "via [🤖 $version](bold green) "
 ## OCaml
 
 The `ocaml` module shows the currently installed version of OCaml.
-The module will be shown if any of the following conditions are met:
+By default the module will be shown if any of the following conditions are met:
 
 - The current directory contains a file with `.opam` extension or `_opam` directory
 - The current directory contains a `esy.lock` directory
@@ -1843,12 +1843,15 @@ The module will be shown if any of the following conditions are met:
 
 ### Options
 
-| Option     | Default                              | Description                                             |
-| ---------- | ------------------------------------ | ------------------------------------------------------- |
-| `format`   | `"via [$symbol($version )]($style)"` | The format string for the module.                       |
-| `symbol`   | `"🐫 "`                              | The symbol used before displaying the version of OCaml. |
-| `style`    | `"bold yellow"`                      | The style for the module.                               |
-| `disabled` | `false`                              | Disables the `ocaml` module.                            |
+| Option              | Default                              | Description                                             |
+| ------------------- | ------------------------------------ | ------------------------------------------------------- |
+| `format`            | `"via [$symbol($version )]($style)"` | The format string for the module.                       |
+| `symbol`            | `"🐫 "`                              | The symbol used before displaying the version of OCaml. |
+| `detect_extensions` | `["opam", "ml", "mli", "re", "rei"]` | Which extensions should trigger this moudle.            |
+| `detect_files`      | `["dune", "dune-project", "jbuild", "jbuild-ignore", ".merlin"]` | Which filenames should trigger this module. |
+| `detect_folders`    | `["_opam", "esy.lock"]`              | Which folders should trigger this module.               |
+| `style`             | `"bold yellow"`                      | The style for the module.                               |
+| `disabled`          | `false`                              | Disables the `ocaml` module.                            |
 
 ### Variables
 

src/configs/ocaml.rs

@@ -8,6 +8,9 @@ pub struct OCamlConfig<'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 OCamlConfig<'a> {
@@ -17,6 +20,9 @@ impl<'a> RootModuleConfig<'a> for OCamlConfig<'a> {
             symbol: "🐫 ",
             style: "bold yellow",
             disabled: false,
+            detect_extensions: vec!["opam", "ml", "mli", "re", "rei"],
+            detect_files: vec!["dune", "dune-project", "jbuild", "jbuild-ignore", ".merlin"],
+            detect_folders: vec!["_opam", "esy.lock"],
         }
     }
 }

src/modules/ocaml.rs

@@ -4,29 +4,20 @@ use crate::configs::ocaml::OCamlConfig;
 use crate::formatter::StringFormatter;
 
 /// Creates a module with the current OCaml version
-///
-/// Will display the OCaml version if any of the following criteria are met:
-///     - Current directory contains a file with `.opam` extension or `_opam` directory
-///     - Current directory contains a `esy.lock` directory
-///     - Current directory contains a `dune` or `dune-project` file
-///     - Current directory contains a `jbuild` or `jbuild-ignore` file
-///     - Current directory contains a `.merlin` file
-///     - Current directory contains a file with `.ml`, `.mli`, `.re` or `.rei` extension
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
+    let mut module = context.new_module("ocaml");
+    let config: OCamlConfig = OCamlConfig::try_load(module.config);
     let is_ocaml_project = context
         .try_begin_scan()?
-        .set_files(&["dune", "dune-project", "jbuild", "jbuild-ignore", ".merlin"])
-        .set_folders(&["_opam", "esy.lock"])
-        .set_extensions(&["opam", "ml", "mli", "re", "rei"])
+        .set_files(&config.detect_files)
+        .set_folders(&config.detect_folders)
+        .set_extensions(&config.detect_extensions)
         .is_match();
 
     if !is_ocaml_project {
         return None;
     }
 
-    let mut module = context.new_module("ocaml");
-    let config: OCamlConfig = OCamlConfig::try_load(module.config);
-
     let parsed = StringFormatter::new(config.format).and_then(|formatter| {
         formatter
             .map_meta(|variable, _| match variable {