Split yunq compliation to library and use it in build process.

yunq/rust/Cargo.lock

@@ -255,7 +255,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
 
 [[package]]
-name = "yunq"
+name = "yunqc"
 version = "0.1.0"
 dependencies = [
  "clap",

yunq/rust/Cargo.toml

@@ -1,12 +1,20 @@
 [package]
-name = "yunq"
+name = "yunqc"
 version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-clap = { version = "4.5.7", features = ["derive"] }
 convert_case = "0.6.0"
 prettyplease = "0.2.20"
 proc-macro2 = { version = "1.0" }
 quote = { version = "1.0" }
 syn = "2.0.72"
+
+clap = { version = "4.5.7", features = ["derive"], optional = true}
+
+[features]
+build-binary = ["clap"]
+
+[[bin]]
+name = "yunqc"
+required-features = ["build-binary"]

yunq/rust/src/lib.rs

@@ -0,0 +1,15 @@
+mod codegen;
+mod lexer;
+mod parser;
+
+use std::error::Error;
+
+pub fn codegen(input: &str) -> Result<String, Box<dyn Error>> {
+    let tokens = lexer::lex_input(input)?;
+
+    let mut ast_parser = parser::Parser::new(&tokens);
+    ast_parser.parse_ast()?;
+    ast_parser.type_check()?;
+
+    Ok(codegen::generate_code(ast_parser.ast()))
+}

yunq/rust/src/main.rs

@@ -1,7 +1,3 @@
-mod codegen;
-mod lexer;
-mod parser;
-
 use std::error::Error;
 use std::fs;
 
@@ -22,13 +18,8 @@ struct Args {
 fn main() -> Result<(), Box<dyn Error>> {
     let args = Args::parse();
     let input = fs::read_to_string(args.input_path)?;
-    let tokens = lexer::lex_input(&input)?;
 
-    let mut ast_parser = parser::Parser::new(&tokens);
-    ast_parser.parse_ast()?;
-    ast_parser.type_check()?;
-
-    let code = codegen::generate_code(ast_parser.ast());
+    let code = yunqc::codegen(&input)?;
 
     fs::write(args.output_path, code)?;