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use proc_macro::TokenStream;
use proc_macro2::{Ident, Span};
use quote::quote;
use syn::{parse_macro_input, Error};
#[proc_macro_attribute]
pub fn oxi_test(attr: TokenStream, item: TokenStream) -> TokenStream {
let args = parse_macro_input!(attr as syn::AttributeArgs);
if !args.is_empty() {
return Error::new(Span::call_site(), "no attributes are supported")
.to_compile_error()
.into();
}
let item = parse_macro_input!(item as syn::ItemFn);
let syn::ItemFn { sig, block, .. } = item;
let test_name = sig.ident;
let test_body = block;
let module_name = Ident::new(&format!("__{test_name}"), Span::call_site());
quote! {
#[test]
fn #test_name() {
let mut library_filename = String::new();
library_filename.push_str(::std::env::consts::DLL_PREFIX);
library_filename.push_str(env!("CARGO_CRATE_NAME"));
library_filename.push_str(::std::env::consts::DLL_SUFFIX);
let mut target_filename = String::from("__");
target_filename.push_str(stringify!(#test_name));
#[cfg(not(target_os = "macos"))]
target_filename.push_str(::std::env::consts::DLL_SUFFIX);
#[cfg(target_os = "macos")]
target_filename.push_str(".so");
let target_dir =
::std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.join("target")
.join("debug");
let library_filepath = target_dir.join(library_filename);
if !library_filepath.exists() {
panic!(
"Compiled library not found in '{}'. Please run `cargo \
build` before running the tests.",
library_filepath.display()
)
}
let target_filepath =
target_dir.join("oxi-test").join("lua").join(target_filename);
if !target_filepath.parent().unwrap().exists() {
if let Err(err) = ::std::fs::create_dir_all(
target_filepath.parent().unwrap(),
) {
if !matches!(
err.kind(),
::std::io::ErrorKind::AlreadyExists
) {
panic!("{}", err)
}
}
}
#[cfg(unix)]
let res = ::std::os::unix::fs::symlink(
&library_filepath,
&target_filepath,
);
#[cfg(windows)]
let res = ::std::os::windows::fs::symlink_file(
&library_filepath,
&target_filepath,
);
if let Err(err) = res {
if !matches!(err.kind(), ::std::io::ErrorKind::AlreadyExists) {
panic!("{}", err)
}
}
let out = ::std::process::Command::new("nvim")
.args(["-u", "NONE", "--headless"])
.args(["-c", "set noswapfile"])
.args([
"-c",
&format!(
"set rtp+={}",
target_dir.join("oxi-test").display()
),
])
.args([
"-c",
&format!("lua require('__{}')", stringify!(#test_name)),
])
.args(["+quit"])
.output()
.expect("Couldn't find `nvim` binary in $PATH!");
let stderr = String::from_utf8_lossy(&out.stderr);
if !stderr.is_empty() {
let stderr = {
let lines = stderr.lines().collect::<Vec<_>>();
let len = lines.len();
lines[..lines.len() - 2].join("\n")
};
let (_, stderr) = stderr.split_at(31);
panic!("{}", stderr)
}
}
#[::nvim_oxi::module]
fn #module_name() -> ::nvim_oxi::Result<()> {
let result = ::std::panic::catch_unwind(|| {
#test_body
});
::std::process::exit(match result {
Ok(_) => 0,
Err(err) => {
eprintln!("{:?}", err);
1
},
})
}
}
.into()
}