feat(package): support for dart pub version (#3373)

* feat(package): add support for dart pub version

* feat(package): add doc for dat pub version

docs/config/README.md

@@ -2240,7 +2240,7 @@ symbol = "☁️ "
 
 The `package` module is shown when the current directory is the repository for a
 package, and shows its current version. The module currently supports `npm`, `nimble`, `cargo`,
-`poetry`, `composer`, `gradle`, `julia`, `mix`, `helm` and `shards` packages.
+`poetry`, `composer`, `gradle`, `julia`, `mix`, `helm`, `shards` and `dart` packages.
 
 - [**npm**](https://docs.npmjs.com/cli/commands/npm) – The `npm` package version is extracted from the `package.json` present
   in the current directory
@@ -2260,6 +2260,7 @@ package, and shows its current version. The module currently supports `npm`, `ni
 - [**Shards**](https://crystal-lang.org/reference/the_shards_command/index.html) - The `shards` package version is extracted from the `shard.yml` present
 - [**V**](https://vlang.io) - The `vlang` package version is extracted from the `v.mod` present
 - [**SBT**](https://scala-sbt.org) - The `sbt` package version is extracted from the `build.sbt` present in the current directory
+- [**Dart**](https://pub.dev/) - The `dart` package version is extracted from the `pubspec.yaml` present in the current directory
 
 > ⚠️ The version being shown is that of the package whose source code is in your
 > current directory, not your package manager.

src/modules/package.rs

@@ -239,6 +239,15 @@ fn get_shard_version(context: &Context, config: &PackageConfig) -> Option<String
     format_version(raw_version, config.version_format)
 }
 
+fn get_dart_pub_version(context: &Context, config: &PackageConfig) -> Option<String> {
+    let file_contents = utils::read_file(&context.current_dir.join("pubspec.yaml")).ok()?;
+
+    let data = yaml_rust::YamlLoader::load_from_str(&file_contents).ok()?;
+    let raw_version = data.first()?["version"].as_str()?;
+
+    format_version(raw_version, config.version_format)
+}
+
 fn get_version(context: &Context, config: &PackageConfig) -> Option<String> {
     let package_version_fn: Vec<fn(&Context, &PackageConfig) -> Option<String>> = vec![
         get_cargo_version,
@@ -257,6 +266,7 @@ fn get_version(context: &Context, config: &PackageConfig) -> Option<String> {
         get_vmod_version,
         get_vpkg_version,
         get_sbt_version,
+        get_dart_pub_version,
     ];
 
     package_version_fn.iter().find_map(|f| f(context, config))
@@ -1132,6 +1142,22 @@ scalaVersion := \"2.13.7\"
         project_dir.close()
     }
 
+    #[test]
+    fn test_extract_dart_pub_version() -> io::Result<()> {
+        let config_name = "pubspec.yaml";
+        let config_content = "
+name: starship
+version: 1.0.0
+
+environment:
+  sdk: '>=2.15.0 <3.0.0'
+";
+        let project_dir = create_project_dir()?;
+        fill_config(&project_dir, config_name, Some(config_content))?;
+        expect_output(&project_dir, Some("v1.0.0"), None);
+        project_dir.close()
+    }
+
     fn create_project_dir() -> io::Result<TempDir> {
         tempfile::tempdir()
     }