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Apply considerable acrobatics to get the JS/WASM deliverables building to and loadable from a directory other than the one which contains the app-level code. Requires an only-slightly-leaky abstraction of passing a URL argument when loading sqlite3.js but provides much greater flexibility in where the JS/WASM files are located.

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FossilOrigin-Name: 6d468dab9eb84d4548f68014959f02fe4f66455472ff24fe729382bb2972e3d1
This commit is contained in:
stephan
2022-10-19 04:44:58 +00:00
parent 71de8e0241
commit cd0df83c15
27 changed files with 250 additions and 76 deletions
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45
ext/wasm/api/extern-post-js.js
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@ -16,6 +16,27 @@
if(!originalInit){
throw new Error("Expecting self.sqlite3InitModule to be defined by the Emscripten build.");
}
/**
We need to add some state which our custom Module.locateFile()
can see, but an Emscripten limitation currently prevents us from
attaching it to the sqlite3InitModule function object:
https://github.com/emscripten-core/emscripten/issues/18071
The only current workaround is to temporarily stash this state
into the global scope and delete it when sqlite3InitModule()
is called.
*/
const initModuleState = self.sqlite3InitModuleState = Object.assign(Object.create(null),{
moduleScript: self?.document?.currentScript,
isWorker: (!self.document && self.window !== self),
location: self.location,
urlParams: new URL(self.location.href).searchParams
});
if(initModuleState.urlParams.has('sqlite3.dir')){
initModuleState.sqlite3Dir = initModuleState.urlParams.get('sqlite3.dir') +'/';
};
self.sqlite3InitModule = (...args)=>{
//console.warn("Using replaced sqlite3InitModule()",self.location);
return originalInit(...args).then((EmscriptenModule)=>{
@ -32,6 +53,8 @@
Emscripten details. */
return EmscriptenModule;
}
EmscriptenModule.sqlite3.scriptInfo = initModuleState;
//console.warn("sqlite3.scriptInfo =",EmscriptenModule.sqlite3.scriptInfo);
const f = EmscriptenModule.sqlite3.asyncPostInit;
delete EmscriptenModule.sqlite3.asyncPostInit;
return f();
@ -41,13 +64,19 @@
});
};
self.sqlite3InitModule.ready = originalInit.ready;
//console.warn("Replaced sqlite3InitModule()");
})();
if(0){
console.warn("self.location.href =",self.location.href);
if('undefined' !== typeof document){
console.warn("document.currentScript.src =",
document?.currentScript?.src);
if(self.sqlite3InitModuleState.moduleScript){
const sim = self.sqlite3InitModuleState;
let src = sim.moduleScript.src.split('/');
src.pop();
sim.scriptDir = src.join('/') + '/';
}
}
if(0){
console.warn("Replaced sqlite3InitModule()");
console.warn("self.location.href =",self.location.href);
if('undefined' !== typeof document){
console.warn("document.currentScript.src =",
document?.currentScript?.src);
}
}
})();