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Fix using async functions by modifying svelte-preprocess output

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This commit is contained in:
Henrik Giesel 2022-02-26 18:12:41 +01:00
parent 94edaa5e97
commit 94c9cadaaa
1 changed files with 21 additions and 3 deletions
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24
ts/svelte/svelte.ts
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@ -7,7 +7,7 @@ import * as worker from "@bazel/worker";
import { svelte2tsx } from "svelte2tsx";
import preprocess from "svelte-preprocess";
import { basename } from "path";
import * as ts from "typescript";
import ts from "typescript";
import * as svelte from "svelte/compiler";
const parsedCommandLine: ts.ParsedCommandLine = {
@ -133,6 +133,21 @@ function readFile(file: string): Promise<string> {
return fs.promises.readFile(file, "utf-8");
}
// https://github.com/sveltejs/svelte-preprocess/issues/373
function removeDuplicatedAwaitImport(code: string): string {
const regex = /import { __awaiter } from \"tslib\";/g;
let first = true;
return code.replace(regex, (substring: string): string => {
if (first) {
first = false;
return substring;
}
return "";
});
}
async function compileSingleSvelte(
input: SvelteInput,
binDir: string,
@ -157,12 +172,15 @@ async function compileSingleSvelte(
const processed = await svelte.preprocess(input.data, preprocessOptions, {
filename: input.path,
});
const result = svelte.compile(processed.toString!(), {
const processedString = removeDuplicatedAwaitImport(processed.toString!());
const result = svelte.compile(processedString, {
format: "esm",
css: false,
generate: "dom",
filename: input.mjsPath,
});
// warnings are an error
if (result.warnings.length > 0) {
console.log(`warnings during compile: ${result.warnings}`);
@ -177,7 +195,7 @@ async function compileSingleSvelte(
result.js.code;
await writeFile(input.mjsPath, outputSource);
} catch (err) {
console.log(`compile failed: ${err}`);
console.log(`Compile failed: ${err}`);
return;
}
}