openethereum/dapps/js-glue/src/build.rs

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1.7 KiB
Rust
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#[cfg(feature = "with-syntex")]
pub mod inner {
use syntex;
use codegen;
use syntax::{ast, fold};
use std::env;
use std::path::Path;
fn strip_attributes(krate: ast::Crate) -> ast::Crate {
/// Helper folder that strips the serde attributes after the extensions have been expanded.
struct StripAttributeFolder;
impl fold::Folder for StripAttributeFolder {
fn fold_attribute(&mut self, attr: ast::Attribute) -> Option<ast::Attribute> {
match attr.node.value.node {
ast::MetaItemKind::List(ref n, _) if n == &"webapp" => { return None; }
_ => {}
}
Some(attr)
}
fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
fold::noop_fold_mac(mac, self)
}
}
fold::Folder::fold_crate(&mut StripAttributeFolder, krate)
}
pub fn register(reg: &mut syntex::Registry) {
reg.add_attr("feature(custom_derive)");
reg.add_attr("feature(custom_attribute)");
reg.add_decorator("derive_WebAppFiles", codegen::expand_webapp_implementation);
reg.add_post_expansion_pass(strip_attributes);
}
pub fn generate() {
let out_dir = env::var_os("OUT_DIR").unwrap();
let mut registry = syntex::Registry::new();
register(&mut registry);
let src = Path::new("src/lib.rs.in");
let dst = Path::new(&out_dir).join("lib.rs");
registry.expand("", &src, &dst).unwrap();
}
}
#[cfg(not(feature = "with-syntex"))]
pub mod inner {
use codegen;
pub fn register(reg: &mut rustc_plugin::Registry) {
reg.register_syntax_extension(
syntax::parse::token::intern("derive_WebAppFiles"),
syntax::ext::base::MultiDecorator(
Box::new(codegen::expand_webapp_implementation)));
reg.register_attribute("webapp".to_owned(), AttributeType::Normal);
}
pub fn generate() {}
}