feat(cli/fmt): support more markdown extensions (#12195)

4 files changed, 42 insertions, 4 deletions

diff --git a/cli/fs_util.rs b/cli/fs_util.rs
index 446c16f27..86dfb5b10 100644
--- a/cli/fs_util.rs
+++ b/cli/fs_util.rs
@@ -106,7 +106,19 @@ pub fn is_supported_ext_fmt(path: &Path) -> bool {
   if let Some(ext) = get_extension(path) {
     matches!(
       ext.as_str(),
-      "ts" | "tsx" | "js" | "jsx" | "mjs" | "md" | "json" | "jsonc"
+      "ts"
+        | "tsx"
+        | "js"
+        | "jsx"
+        | "mjs"
+        | "json"
+        | "jsonc"
+        | "md"
+        | "mkd"
+        | "mkdn"
+        | "mdwn"
+        | "mdown"
+        | "markdown"
     )
   } else {
     false
@@ -143,7 +155,20 @@ pub fn is_supported_test_path(path: &Path) -> bool {
 /// Checks if the path has an extension Deno supports for tests.
 pub fn is_supported_test_ext(path: &Path) -> bool {
   if let Some(ext) = get_extension(path) {
-    matches!(ext.as_str(), "ts" | "tsx" | "js" | "jsx" | "mjs" | "md")
+    matches!(
+      ext.as_str(),
+      "ts"
+        | "tsx"
+        | "js"
+        | "jsx"
+        | "mjs"
+        | "md"
+        | "mkd"
+        | "mkdn"
+        | "mdwn"
+        | "mdown"
+        | "markdown"
+    )
   } else {
     false
   }
@@ -320,6 +345,11 @@ mod tests {
     assert!(!is_supported_ext_fmt(Path::new("tests/subdir/redirects")));
     assert!(is_supported_ext_fmt(Path::new("README.md")));
     assert!(is_supported_ext_fmt(Path::new("readme.MD")));
+    assert!(is_supported_ext_fmt(Path::new("readme.mkd")));
+    assert!(is_supported_ext_fmt(Path::new("readme.mkdn")));
+    assert!(is_supported_ext_fmt(Path::new("readme.mdwn")));
+    assert!(is_supported_ext_fmt(Path::new("readme.mdown")));
+    assert!(is_supported_ext_fmt(Path::new("readme.markdown")));
     assert!(is_supported_ext_fmt(Path::new("lib/typescript.d.ts")));
     assert!(is_supported_ext_fmt(Path::new("testdata/001_hello.js")));
     assert!(is_supported_ext_fmt(Path::new("testdata/002_hello.ts")));
@@ -342,6 +372,11 @@ mod tests {
     assert!(!is_supported_test_ext(Path::new("tests/subdir/redirects")));
     assert!(is_supported_test_ext(Path::new("README.md")));
     assert!(is_supported_test_ext(Path::new("readme.MD")));
+    assert!(is_supported_ext_fmt(Path::new("readme.mkd")));
+    assert!(is_supported_ext_fmt(Path::new("readme.mkdn")));
+    assert!(is_supported_ext_fmt(Path::new("readme.mdwn")));
+    assert!(is_supported_ext_fmt(Path::new("readme.mdown")));
+    assert!(is_supported_ext_fmt(Path::new("readme.markdown")));
     assert!(is_supported_test_ext(Path::new("lib/typescript.d.ts")));
     assert!(is_supported_test_ext(Path::new("testdata/001_hello.js")));
     assert!(is_supported_test_ext(Path::new("testdata/002_hello.ts")));
diff --git a/cli/tests/integration/fmt_tests.rs b/cli/tests/integration/fmt_tests.rs
index 2d7451694..1adbc8ff8 100644
--- a/cli/tests/integration/fmt_tests.rs
+++ b/cli/tests/integration/fmt_tests.rs
@@ -141,7 +141,7 @@ itest!(fmt_quiet_check_fmt_dir {
 });
 
 itest!(fmt_check_formatted_files {
-    args: "fmt --check fmt/regular/formatted1.js fmt/regular/formatted2.ts fmt/regular/formatted3.md fmt/regular/formatted4.jsonc",
+    args: "fmt --check fmt/regular/formatted1.js fmt/regular/formatted2.ts fmt/regular/formatted3.markdown fmt/regular/formatted4.jsonc",
     output: "fmt/expected_fmt_check_formatted_files.out",
     exit_code: 0,
   });
diff --git a/cli/tests/testdata/fmt/regular/formatted3.md b/cli/tests/testdata/fmt/regular/formatted3.markdown
index e6e616584..e6e616584 100644
--- a/cli/tests/testdata/fmt/regular/formatted3.md
+++ b/cli/tests/testdata/fmt/regular/formatted3.markdown
diff --git a/cli/tools/fmt.rs b/cli/tools/fmt.rs
index 6758d7b8b..5d33240a5 100644
--- a/cli/tools/fmt.rs
+++ b/cli/tools/fmt.rs
@@ -206,7 +206,10 @@ pub fn format_file(
   fmt_options: FmtOptionsConfig,
 ) -> Result<String, String> {
   let ext = get_extension(file_path).unwrap_or_else(String::new);
-  if ext == "md" {
+  if matches!(
+    ext.as_str(),
+    "md" | "mkd" | "mkdn" | "mdwn" | "mdown" | "markdown"
+  ) {
     format_markdown(file_text, &fmt_options)
   } else if matches!(ext.as_str(), "json" | "jsonc") {
     format_json(file_text, &fmt_options)