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Tweak initialization with --no-modules

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* Have the global `wasm_bindgen` variable be a function which runs
  initialization rather than exporting an `init` function.
* Save off the wasm object on `wasm_bindgen.wasm` so the memory can be accessed
* Tidy up the code slightly
This commit is contained in:
Alex Crichton 2018-04-13 07:44:35 -07:00
parent 98016324f7
commit 8854936599
1 changed files with 20 additions and 28 deletions
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48
crates/cli-support/src/js.rs
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@ -267,44 +267,36 @@ impl<'a> Context<'a> {
self.rewrite_imports(module_name); self.rewrite_imports(module_name);
let import_wasm = if self.config.nodejs {
self.footer.push_str(&format!("wasm = require('./{}_bg');",
module_name));
format!("var wasm;")
} else if self.config.no_modules {
format!("
window.wasm_bindgen.init = function(__wasm_path) {{
return fetch(__wasm_path)
.then(response => response.arrayBuffer())
.then(buffer => WebAssembly.instantiate(buffer, {{ './{module}': __exports }}))
.then(({{instance}}) => {{
wasm = instance.exports;
return;
}})
.catch(error => {{
console.log('Error loading wasm module `{module}`:', error);
throw error;
}});
}};
", module = module_name)
} else {
format!("import * as wasm from './{}_bg';", module_name)
};
let js = if self.config.no_modules { let js = if self.config.no_modules {
format!(" format!("
(function() {{ (function() {{
let wasm; var wasm;
const __exports = {{}}; const __exports = {{}};
{globals} {globals}
window.wasm_bindgen = Object.assign({{}}, __exports); function init(wasm_path) {{
{import_wasm} return fetch(wasm_path)
.then(response => response.arrayBuffer())
.then(buffer => WebAssembly.instantiate(buffer, {{ './{module}': __exports }}))
.then(({{instance}}) => {{
wasm = init.wasm = instance.exports;
return;
}});
}};
window.wasm_bindgen = Object.assign(init, __exports);
}})(); }})();
", ",
globals = self.globals, globals = self.globals,
import_wasm = import_wasm, module = module_name,
) )
} else { } else {
let import_wasm = if self.config.nodejs {
self.footer.push_str(&format!("wasm = require('./{}_bg');",
module_name));
format!("var wasm;")
} else {
format!("import * as wasm from './{}_bg';", module_name)
};
format!(" format!("
/* tslint:disable */ /* tslint:disable */
{import_wasm} {import_wasm}