feat(git_metrics): add option to ignore submodules (#5052)

* add docs

* update schema

* ok, actually update schema

* add test

* fix lint

* accidentally included my .devenv directory

4 files changed, 50 insertions, 14 deletions

diff --git a/.github/config-schema.json b/.github/config-schema.json
index a53e35a74..0ddb428e2 100644
--- a/.github/config-schema.json
+++ b/.github/config-schema.json
@@ -576,6 +576,7 @@
         "deleted_style": "bold red",
         "disabled": true,
         "format": "([+$added]($added_style) )([-$deleted]($deleted_style) )",
+        "ignore_submodules": false,
         "only_nonzero_diffs": true
       },
       "allOf": [
@@ -3188,6 +3189,10 @@
         "disabled": {
           "default": true,
           "type": "boolean"
+        },
+        "ignore_submodules": {
+          "default": false,
+          "type": "boolean"
         }
       },
       "additionalProperties": false
diff --git a/docs/config/README.md b/docs/config/README.md
index 3fdb9c162..a6f4de02d 100644
--- a/docs/config/README.md
+++ b/docs/config/README.md
@@ -1820,6 +1820,7 @@ To enable it, set `disabled` to `false` in your configuration file.
 | `only_nonzero_diffs` | `true`                                                       | Render status only for changed items. |
 | `format`             | `'([+$added]($added_style) )([-$deleted]($deleted_style) )'` | The format for the module.            |
 | `disabled`           | `true`                                                       | Disables the `git_metrics` module.    |
+| `ignore_submodules`  | `false`                                                      | Ignore changes to submodules          |
 
 ### Variables
 
diff --git a/src/configs/git_metrics.rs b/src/configs/git_metrics.rs
index 928d98297..ea504c53b 100644
--- a/src/configs/git_metrics.rs
+++ b/src/configs/git_metrics.rs
@@ -13,6 +13,7 @@ pub struct GitMetricsConfig<'a> {
     pub only_nonzero_diffs: bool,
     pub format: &'a str,
     pub disabled: bool,
+    pub ignore_submodules: bool,
 }
 
 impl<'a> Default for GitMetricsConfig<'a> {
@@ -23,6 +24,7 @@ impl<'a> Default for GitMetricsConfig<'a> {
             only_nonzero_diffs: true,
             format: "([+$added]($added_style) )([-$deleted]($deleted_style) )",
             disabled: true,
+            ignore_submodules: false,
         }
     }
 }
diff --git a/src/modules/git_metrics.rs b/src/modules/git_metrics.rs
index b3d96dcb4..b82784ad2 100644
--- a/src/modules/git_metrics.rs
+++ b/src/modules/git_metrics.rs
@@ -23,20 +23,21 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let repo = context.get_repo().ok()?;
     let repo_root = repo.workdir.as_ref()?;
 
-    let diff = context
-        .exec_cmd(
-            "git",
-            &[
-                OsStr::new("--git-dir"),
-                repo.path.as_os_str(),
-                OsStr::new("--work-tree"),
-                repo_root.as_os_str(),
-                OsStr::new("--no-optional-locks"),
-                OsStr::new("diff"),
-                OsStr::new("--shortstat"),
-            ],
-        )?
-        .stdout;
+    let mut args = vec![
+        OsStr::new("--git-dir"),
+        repo.path.as_os_str(),
+        OsStr::new("--work-tree"),
+        repo_root.as_os_str(),
+        OsStr::new("--no-optional-locks"),
+        OsStr::new("diff"),
+        OsStr::new("--shortstat"),
+    ];
+
+    if config.ignore_submodules {
+        args.push(OsStr::new("--ignore-submodules"));
+    }
+
+    let diff = context.exec_cmd("git", &args)?.stdout;
 
     let stats = GitDiff::parse(&diff);
 
@@ -228,6 +229,33 @@ mod tests {
         repo_dir.close()
     }
 
+    #[test]
+    fn shows_all_changes_with_ignored_submodules() -> io::Result<()> {
+        let repo_dir = create_repo_with_commit()?;
+        let path = repo_dir.path();
+
+        let file_path = path.join("the_file");
+        write_file(file_path, "\nSecond Line\n\nModified\nAdded\n")?;
+
+        let actual = ModuleRenderer::new("git_metrics")
+            .config(toml::toml! {
+                    [git_metrics]
+                    disabled = false
+                    ignore_submodules = true
+            })
+            .path(path)
+            .collect();
+
+        let expected = Some(format!(
+            "{} {} ",
+            Color::Green.bold().paint("+4"),
+            Color::Red.bold().paint("-2")
+        ));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
     fn render_metrics(path: &Path) -> Option<String> {
         ModuleRenderer::new("git_metrics")
             .config(toml::toml! {