feat(config): add support for fallback formatters (#446)

CHANGELOG.md

@@ -6,6 +6,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
 #### [Unreleased](https://github.com/hougesen/mdsf/compare/v0.2.2...HEAD)
 
+- chore: update language ext map [`#445`](https://github.com/hougesen/mdsf/pull/445)
 - build(deps): bump clap_complete from 4.5.12 to 4.5.24 [`#439`](https://github.com/hougesen/mdsf/pull/439)
 - build(deps): bump serde_json from 1.0.122 to 1.0.127 in /codegen [`#443`](https://github.com/hougesen/mdsf/pull/443)
 - build(deps): bump serde_json from 1.0.122 to 1.0.127 [`#438`](https://github.com/hougesen/mdsf/pull/438)

README.md

@@ -120,12 +120,20 @@ mdsf init
 
 ```json
 {
-  // Only run `ruff` on Python snippets,
-  "python": "ruff",
-  // Run `usort` on file and then `black`
-  "python": ["usort", "black"],
-  // Run `usort`, if that fails run `isort`, finally run `black`
-  "python": [["usort", "isort"], "black"]
+  "languages": {
+    // Only run `ruff` on Python snippets,
+    "python": "ruff",
+    // Run `usort` on file and then `black`
+    "python": ["usort", "black"],
+    // Run `usort`, if that fails run `isort`, finally run `black`
+    "python": [["usort", "isort"], "black"],
+
+    // Formatters listed under "*" will be run on any snippet.
+    "*": ["typos"],
+
+    // Formatters listed under "_" will only be run when there is not formatter configured for the file type OR globally ("*").
+    "_": "prettier"
+  }
 }
 ```
 

src/formatters/mod.rs

@@ -286,7 +286,17 @@ pub fn execute_command(
 
 #[inline]
 pub fn format_snippet(config: &MdsfConfig, info: &LineInfo, code: &str) -> String {
-    if let Some(formatters) = config.languages.get(info.language) {
+    let always_ran = config.languages.get("*");
+
+    let language_formatters = config.languages.get(info.language).or_else(|| {
+        if always_ran.is_none() {
+            config.languages.get("_")
+        } else {
+            None
+        }
+    });
+
+    if always_ran.is_some() || language_formatters.is_some() {
         if let Ok(snippet) = setup_snippet(
             code,
             config
@@ -305,12 +315,26 @@ pub fn format_snippet(config: &MdsfConfig, info: &LineInfo, code: &str) -> Strin
         ) {
             let snippet_path = snippet.path();
 
-            if let Ok(Some(formatted_code)) = formatters.format(snippet_path, info) {
-                let mut f = formatted_code.trim().to_owned();
+            if let Some(formatters) = always_ran {
+                if let Ok(Some(formatted_code)) = formatters.format(snippet_path, info) {
+                    if language_formatters.is_none() {
+                        let mut f = formatted_code.trim().to_owned();
 
-                f.push('\n');
+                        f.push('\n');
 
-                return f;
+                        return f;
+                    }
+                }
+            }
+
+            if let Some(formatters) = language_formatters {
+                if let Ok(Some(formatted_code)) = formatters.format(snippet_path, info) {
+                    let mut f = formatted_code.trim().to_owned();
+
+                    f.push('\n');
+
+                    return f;
+                }
             }
         }
     }

src/lib.rs

@@ -43,7 +43,12 @@ fn format_file(config: &MdsfConfig, filename: &std::path::Path, input: &str) ->
         if line.starts_with("```") {
             let language = line.strip_prefix("```").map(str::trim).unwrap_or_default();
 
-            if config.languages.contains_key(language) {
+            // "*" is always ran
+            // "_" is fallback formatters
+            if config.languages.contains_key(language)
+                || config.languages.contains_key("*")
+                || config.languages.contains_key("_")
+            {
                 let is_go = language == "go" || language == "golang";
 
                 let (is_snippet, code_snippet, snippet_lines) = if is_go {