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Allow passing a WebAssembly.Module in --no-modules

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I've noticed this in a few cases where it's sometimes easy to have a
`WebAssembly.Module` on-hand for the `--no-modules` mode where you don't
want to necessarily `fetch`. This commit changes the exported
initialization function in `--no-modules` mode to support both!
This commit is contained in:
Alex Crichton
2018-10-16 10:48:07 -07:00
parent 0b59657603
commit 34b75c35b2
2 changed files with 32 additions and 27 deletions
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47
crates/cli-support/src/js/mod.rs
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@ -418,27 +418,32 @@ impl<'a> Context<'a> {
let mut js = if self.config.no_modules {
format!(
"\
(function() {{
var wasm;
const __exports = {{}};
{globals}
function init(wasm_path) {{
const fetchPromise = fetch(wasm_path);
let resultPromise;
if (typeof WebAssembly.instantiateStreaming === 'function') {{
resultPromise = WebAssembly.instantiateStreaming(fetchPromise, {{ './{module}': __exports }});
}} else {{
resultPromise = fetchPromise
.then(response => response.arrayBuffer())
.then(buffer => WebAssembly.instantiate(buffer, {{ './{module}': __exports }}));
}}
return resultPromise.then(({{instance}}) => {{
wasm = init.wasm = instance.exports;
return;
}});
}};
self.{global_name} = Object.assign(init, __exports);
}})();",
(function() {{
var wasm;
const __exports = {{}};
{globals}
function init(path_or_module) {{
let instantiation;
const imports = {{ './{module}': __exports }};
if (path_or_module instanceof WebAssembly.Module) {{
instantiation = WebAssembly.instantiate(path_or_module, imports);
}} else {{
const data = fetch(path_or_module);
if (typeof WebAssembly.instantiateStreaming === 'function') {{
instantiation = WebAssembly.instantiateStreaming(data, imports);
}} else {{
instantiation = data
.then(response => response.arrayBuffer())
.then(buffer => WebAssembly.instantiate(buffer, imports));
}}
}}
return instantiation.then(({{instance}}) => {{
wasm = init.wasm = instance.exports;
return;
}});
}};
self.{global_name} = Object.assign(init, __exports);
}})();",
globals = self.globals,
module = module_name,
global_name = self.config.no_modules_global