52 lines
1.9 KiB
JavaScript
52 lines
1.9 KiB
JavaScript
const fs = require('fs/promises');
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const path = require('path');
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module.exports = function injectWebManifest(manifestFile) {
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let root;
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let base;
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let manifestHref;
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return {
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name: "hydrogen:injectWebManifest",
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apply: "build",
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configResolved: config => {
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root = config.root;
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base = config.base;
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},
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transformIndexHtml: {
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transform(html) {
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return [{
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tag: "link",
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attrs: {rel: "manifest", href: manifestHref},
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injectTo: "head"
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}];
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},
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},
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generateBundle: async function() {
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const absoluteManifestFile = path.resolve(root, manifestFile);
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const manifestDir = path.dirname(absoluteManifestFile);
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const json = await fs.readFile(absoluteManifestFile, {encoding: "utf8"});
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const manifest = JSON.parse(json);
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for (const icon of manifest.icons) {
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const iconFileName = path.resolve(manifestDir, icon.src);
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const imgData = await fs.readFile(iconFileName);
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const ref = this.emitFile({
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type: "asset",
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name: path.basename(iconFileName),
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source: imgData
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});
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// we take the basename as getFileName gives the filename
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// relative to the output dir, but the manifest is an asset
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// just like they icon, so we assume they end up in the same dir
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icon.src = path.basename(this.getFileName(ref));
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}
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const outputName = path.basename(absoluteManifestFile);
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const manifestRef = this.emitFile({
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type: "asset",
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name: outputName,
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source: JSON.stringify(manifest)
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});
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manifestHref = base + this.getFileName(manifestRef);
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}
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};
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}
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