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detect_filetype.rs

@@ -0,0 +1,37 @@
+use crate::language::Language;
+use std::path::Path;
+
+const DOCKERFILE_KEY_WORD: &str = "Dockerfile";
+const DOCKER_COMPOSE_KEYWORD: &str = "docker-compose.yml";
+
+pub fn detect_language(filename: &str) -> Language {
+    if filename.is_empty() {
+        return Language::Plain;
+    }
+    let path = Path::new(filename);
+    if let Some(ext) = path.extension().and_then(|s| s.to_str()) {
+        match ext {
+            "py" => return Language::Python,
+            "js" => return Language::JavaScript,
+            "c" | "h" | "cpp" | "ino" => return Language::Clang,
+            "md" => return Language::Markdown,
+            "html" | "htm" | "xml" => return Language::Html,
+            "sh" => return Language::Shell,
+            "asm" => return Language::AsmX86,
+            "a51" => return Language::Asm8051,
+            "sql" => return Language::Sql,
+            "rs" => return Language::Rust,
+            "log" => return Language::LogFile,
+            "java" => return Language::LangJava,
+            _ => {}
+        }
+    }
+    let base = path.file_name().and_then(|s| s.to_str()).unwrap_or(filename);
+    if base.eq_ignore_ascii_case(DOCKERFILE_KEY_WORD) {
+        return Language::Docker;
+    }
+    if base.eq_ignore_ascii_case(DOCKER_COMPOSE_KEYWORD) {
+        return Language::LangDockerCompose;
+    }
+    Language::Plain
+}