feat(golang): Configure when the module is shown (#2325)

This makes it possible to configure when the golang 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

@@ -1233,7 +1233,7 @@ behind = "⇣${count}"
 ## Golang
 
 The `golang` module shows the currently installed version of Golang.
-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 `go.mod` file
 - The current directory contains a `go.sum` file
@@ -1246,12 +1246,15 @@ The module will be shown if any of the following conditions are met:
 
 ### Options
 
-| Option     | Default                            | Description                                    |
-| ---------- | ---------------------------------- | ---------------------------------------------- |
-| `format`   | `"via [$symbol($version )]($style)"` | The format for the module.                     |
-| `symbol`   | `"🐹 "`                            | A format string representing the symbol of Go. |
-| `style`    | `"bold cyan"`                      | The style for the module.                      |
-| `disabled` | `false`                            | Disables the `golang` module.                  |
+| Option               | Default                                                                        | Description                                    |
+| -------------------- | ------------------------------------------------------------------------------ | ---------------------------------------------- |
+| `format`             | `"via [$symbol($version )]($style)"`                                           | The format for the module.                     |
+| `symbol`             | `"🐹 "`                                                                        | A format string representing the symbol of Go. |
+| `detect_extensions`  | `["go"]`                                                                       | Which extensions should trigger this moudle.   |
+| `detect_files`       | `["go.mod", "go.sum", "glide.yaml", "Gopkg.yml", "Gopkg.lock", ".go-version"]` | Which filenames should trigger this module.    |
+| `detect_folders`     | `["Godeps"]`                                                                   | Which folders should trigger this module.      |
+| `style`              | `"bold cyan"`                                                                  | The style for the module.                      |
+| `disabled`           | `false`                                                                        | Disables the `golang` module.                  |
 
 ### Variables
 

src/configs/go.rs

@@ -8,6 +8,9 @@ pub struct GoConfig<'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 GoConfig<'a> {
@@ -17,6 +20,16 @@ impl<'a> RootModuleConfig<'a> for GoConfig<'a> {
             symbol: "🐹 ",
             style: "bold cyan",
             disabled: false,
+            detect_extensions: vec!["go"],
+            detect_files: vec![
+                "go.mod",
+                "go.sum",
+                "glide.yaml",
+                "Gopkg.yml",
+                "Gopkg.lock",
+                ".go-version",
+            ],
+            detect_folders: vec!["Godeps"],
         }
     }
 }

src/modules/golang.rs

@@ -4,37 +4,20 @@ use crate::configs::go::GoConfig;
 use crate::formatter::StringFormatter;
 
 /// Creates a module with the current Go version
-///
-/// Will display the Go version if any of the following criteria are met:
-///     - Current directory contains a `go.mod` file
-///     - Current directory contains a `go.sum` file
-///     - Current directory contains a `glide.yaml` file
-///     - Current directory contains a `Gopkg.yml` file
-///     - Current directory contains a `Gopkg.lock` file
-///     - Current directory contains a `.go-version` file
-///     - Current directory contains a `Godeps` directory
-///     - Current directory contains a file with the `.go` extension
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
+    let mut module = context.new_module("golang");
+    let config = GoConfig::try_load(module.config);
     let is_go_project = context
         .try_begin_scan()?
-        .set_files(&[
-            "go.mod",
-            "go.sum",
-            "glide.yaml",
-            "Gopkg.yml",
-            "Gopkg.lock",
-            ".go-version",
-        ])
-        .set_extensions(&["go"])
-        .set_folders(&["Godeps"])
+        .set_files(&config.detect_files)
+        .set_extensions(&config.detect_extensions)
+        .set_folders(&config.detect_folders)
         .is_match();
 
     if !is_go_project {
         return None;
     }
 
-    let mut module = context.new_module("golang");
-    let config = GoConfig::try_load(module.config);
     let parsed = StringFormatter::new(config.format).and_then(|formatter| {
         formatter
             .map_meta(|var, _| match var {