mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-13 22:25:40 +00:00
112 lines
3.5 KiB
Rust
112 lines
3.5 KiB
Rust
//! This file will run at build time to autogenerate the Emscripten tests
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//! It will compile the files indicated in TESTS, to:executable and .wasm
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//! - Compile using cc and get the output from it (expected output)
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//! - Compile using emcc and get the .wasm from it (wasm)
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//! - Generate the test that will compare the output of running the .wasm file
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//! with wasmer with the expected output
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use std::fs;
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use std::path::PathBuf;
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use std::process::Command;
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static BANNER: &str = "// Rust test file autogenerated with cargo build (build/emtests.rs).
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// Please do NOT modify it by hand, as it will be reseted on next build.\n";
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const TESTS: [&str; 3] = ["emtests/env.c", "emtests/puts.c", "emtests/printf.c"];
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pub fn compile(file: &str) -> String {
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let mut output_path = PathBuf::from(file);
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output_path.set_extension("out");
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let output_str = output_path.to_str().unwrap();
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// Compile to .out
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Command::new("cc")
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.arg(file)
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.arg("-o")
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.arg(output_str)
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.output()
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.expect("failed to execute process");
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// Get the result of .out
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let output = Command::new(output_str)
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.arg(output_str)
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.output()
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.expect("failed to execute process");
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// Remove executable
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fs::remove_file(output_str).unwrap();
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let mut output_path = PathBuf::from(file);
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output_path.set_extension("js");
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let output_str = output_path.to_str().unwrap();
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// Compile to wasm
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let _wasm_compilation = Command::new("emcc")
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.arg(file)
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.arg("-s")
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.arg("WASM=1")
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.arg("-o")
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.arg(output_str)
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.output()
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.expect("failed to execute process");
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// panic!("{:?}", wasm_compilation);
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// if output.stderr {
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// panic!("{}", output.stderr);
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// }
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// Remove js file
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fs::remove_file(output_str).unwrap();
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let mut output_path = PathBuf::from(file);
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output_path.set_extension("output");
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let module_name = output_path
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.file_stem()
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.unwrap()
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.to_str()
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.unwrap()
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.to_owned();
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let output_str = output_path.to_str().unwrap();
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// Write the output to file
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fs::write(output_str, output.stdout).expect("Unable to write file");
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let rust_test_filepath = format!(
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concat!(env!("CARGO_MANIFEST_DIR"), "/src/emtests/{}.rs"),
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module_name.as_str()
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);
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let contents = format!("#[test]
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fn test_{module_name}() {{
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assert_emscripten_output!(\"../../emtests/{module_name}.wasm\", \"{module_name}\", vec![], \"../../emtests/{module_name}.output\");
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}}
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", module_name=module_name);
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fs::write(&rust_test_filepath, contents.as_bytes()).unwrap();
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module_name
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// panic!("OUTPUT: {:?}", output);
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}
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pub fn build() {
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let rust_test_modpath = concat!(env!("CARGO_MANIFEST_DIR"), "/src/emtests/mod.rs");
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let mut modules: Vec<String> = Vec::new();
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// modules.reserve_exact(TESTS.len());
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for test in TESTS.iter() {
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let moudle_name = compile(test);
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modules.push(format!("mod {};", moudle_name));
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}
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modules.insert(0, BANNER.to_string());
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modules.insert(1, "// The _common module is not autogenerated, as it provides common macros for the emtests\n#[macro_use]\nmod _common;".to_string());
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// We add an empty line
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modules.push("".to_string());
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let modfile: String = modules.join("\n");
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let source = fs::read(&rust_test_modpath).unwrap();
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// We only modify the mod file if has changed
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if source != modfile.as_bytes() {
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fs::write(&rust_test_modpath, modfile.as_bytes()).unwrap();
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}
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}
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