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/* ^^^^ ACHTUNG: blank line at the start is necessary because
Emscripten will not add a newline in some cases and we need
a blank line for a sed-based kludge for the ES6 build. */
/* extern-post-js.js must be appended to the resulting sqlite3.js
file. It gets its name from being used as the value for the
--extern-post-js=... Emscripten flag. Note that this code, unlike
most of the associated JS code, runs outside of the
Emscripten-generated module init scope, in the current
global scope. */
//#if target=es6-module
const toExportForESM =
//#endif
(function(){
/**
In order to hide the sqlite3InitModule()'s resulting
Emscripten module from downstream clients (and simplify our
documentation by being able to elide those details), we hide that
function and expose a hand-written sqlite3InitModule() to return
the sqlite3 object (most of the time).
Unfortunately, we cannot modify the module-loader/exporter-based
impls which Emscripten installs at some point in the file above
this.
*/
const originalInit =
/* Maintenance reminder: DO NOT use `self.` here. It's correct
for non-ES6 Module cases but wrong for ES6 modules because those
resolve this symbol differently. */ sqlite3InitModule;
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: ('undefined' !== typeof WorkerGlobalScope),
location: self.location,
urlParams: new URL(self.location.href).searchParams
});
initModuleState.debugModule =
initModuleState.urlParams.has('sqlite3.debugModule')
? (...args)=>console.warn('sqlite3.debugModule:',...args)
: ()=>{};
if(initModuleState.urlParams.has('sqlite3.dir')){
initModuleState.sqlite3Dir = initModuleState.urlParams.get('sqlite3.dir') +'/';
}else if(initModuleState.moduleScript){
const li = initModuleState.moduleScript.src.split('/');
li.pop();
initModuleState.sqlite3Dir = li.join('/') + '/';
}
self.sqlite3InitModule = function ff(...args){
//console.warn("Using replaced sqlite3InitModule()",self.location);
return originalInit(...args).then((EmscriptenModule)=>{
if(self.window!==self &&
(EmscriptenModule['ENVIRONMENT_IS_PTHREAD']
|| EmscriptenModule['_pthread_self']
|| 'function'===typeof threadAlert
|| self.location.pathname.endsWith('.worker.js')
)){
/** Workaround for wasmfs-generated worker, which calls this
routine from each individual thread and requires that its
argument be returned. All of the criteria above are fragile,
based solely on inspection of the offending code, not public
Emscripten details. */
return EmscriptenModule;
}
const s = EmscriptenModule.sqlite3;
s.scriptInfo = initModuleState;
//console.warn("sqlite3.scriptInfo =",s.scriptInfo);
if(ff.__isUnderTest) s.__isUnderTest = true;
const f = s.asyncPostInit;
delete s.asyncPostInit;
return f();
}).catch((e)=>{
console.error("Exception loading sqlite3 module:",e);
throw e;
});
};
self.sqlite3InitModule.ready = originalInit.ready;
if(self.sqlite3InitModuleState.moduleScript){
const sim = self.sqlite3InitModuleState;
let src = sim.moduleScript.src.split('/');
src.pop();
sim.scriptDir = src.join('/') + '/';
}
initModuleState.debugModule('sqlite3InitModuleState =',initModuleState);
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);
}
}
//#ifnot target=es6-module
// Emscripten does not inject these module-loader bits in ES6 module
// builds and including them here breaks JS bundlers, so elide them
// from ESM builds.
/* Replace the various module exports performed by the Emscripten
glue... */
if (typeof exports === 'object' && typeof module === 'object'){
module.exports = sqlite3InitModule;
}else if (typeof exports === 'object'){
exports["sqlite3InitModule"] = sqlite3InitModule;
}
/* AMD modules get injected in a way we cannot override,
so we can't handle those here. */
//#endif // !target=es6-module
return self.sqlite3InitModule /* required for ESM */;
})();
//#if target=es6-module
export default toExportForESM;
//#endif
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