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then pattern

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This commit is contained in:
Thibault “Adædra” Hamel 2024-06-26 05:30:43 +02:00
parent 4bf647701a
commit dccb5f716c
2 changed files with 29 additions and 35 deletions
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54
lib/rx-utils.ts
View File

@ -1,62 +1,56 @@
import { Observable, from, map, mergeAll } from "rxjs";
import { Observable, from, map } from "rxjs";
import File from "vinyl";
import { Glob } from "glob";
import { readFile } from "node:fs/promises";
import { join, dirname } from "node:path";
import { existsSync, mkdirSync, writeFileSync } from "node:fs";
import { existsSync } from "node:fs";
import { writeFile, mkdir } from "node:fs/promises";
export function src(glob: string | string[]): Observable<File> {
export function src(glob: string | string[]): Observable<Promise<File>> {
return from(new Glob(glob, {})).pipe(
map(async (path) => new File({ path, contents: await readFile(path) })),
map(from),
mergeAll(),
);
}
export function dist(prefix: string) {
return (observable: Observable<File>): Observable<File> =>
new Observable((subscriber) =>
observable.subscribe({
next(value) {
const actualPath = join(prefix, value.path);
if (!existsSync(dirname(actualPath))) {
mkdirSync(dirname(actualPath), { recursive: true });
}
writeFileSync(actualPath, value.contents as Buffer);
console.log("[-] Written", actualPath);
export function then<T, U>(f: (v: T) => Promise<U>) {
return (observable: Observable<Promise<T>>): Observable<Promise<U>> =>
observable.pipe(map((v) => v.then(f)));
}
subscriber.next(value);
},
complete() {
subscriber.complete();
},
}),
);
export function dest(prefix: string) {
return async (file: File) => {
const actualPath = join(prefix, file.path);
if (!existsSync(dirname(actualPath))) {
await mkdir(dirname(actualPath), { recursive: true });
}
await writeFile(actualPath, file.contents as Buffer);
console.log("[-] Written", actualPath);
return file;
};
}
export function synchronise<T>() {
return (observable: Observable<Promise<T>>): Observable<T> =>
new Observable<T>((subscriber) => {
const promiseArray = [];
const runningPromises = new Set<Promise<void>>();
let done = false;
observable.subscribe({
next(value) {
const promise = value.then((v) => {
const i = promiseArray.findIndex((i) => i == promise);
promiseArray.splice(i, 1);
runningPromises.delete(promise);
subscriber.next(v);
if (promiseArray.length === 0 && done) {
if (runningPromises.size === 0 && done) {
subscriber.complete();
}
});
promiseArray.push(promise);
runningPromises.add(promise);
},
complete() {
done = true;
if (promiseArray.length === 0) {
console.log("[synchronise] complete (from complete)");
if (runningPromises.size === 0) {
subscriber.complete();
}
},

10
lib/tasks/articles.ts
View File

@ -18,8 +18,8 @@ import { renderToStaticMarkup } from "preact-render-to-string";
import { SITE_TITLE, SITE_DESCRIPTION } from "../constants.js";
import { JSX } from "preact/jsx-runtime";
import { reloadAssets } from "../assets.js";
import { map, lastValueFrom } from "rxjs";
import { src, synchronise, dist } from "../rx-utils.js";
import { lastValueFrom } from "rxjs";
import { src, synchronise, dest, then } from "../rx-utils.js";
const Asciidoctor = asciidoctor();
const EXTENSION_REGISTRY = Asciidoctor.Extensions.create();
@ -75,7 +75,7 @@ export async function articles(): Promise<void> {
await lastValueFrom(
src("articles/**/*.asciidoc").pipe(
map(async (file) => {
then(async (file) => {
const slug = basename(file.path, ".asciidoc");
const document = Asciidoctor.load(file.contents.toString(), {
extension_registry: EXTENSION_REGISTRY,
@ -119,8 +119,8 @@ export async function articles(): Promise<void> {
return file;
}),
then(dest("dist")),
synchronise(),
dist("dist"),
),
);
images.forEach(_output);
@ -133,7 +133,7 @@ export async function articles(): Promise<void> {
"og:type": "website",
"og:url": `https://adaedra.eu`,
},
Content: () => renderIndex({ articles: articles }),
Content: () => renderIndex({ articles }),
});
_output(