Support theming in dev server
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RMidhunSuresh
parent
a6b6fef6d2
commit
ff98ef4465
1 changed files with 137 additions and 61 deletions
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@ -13,17 +13,45 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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const path = require('path');
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async function readCSSSource(location) {
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const fs = require("fs").promises;
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const path = require("path");
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const resolvedLocation = path.resolve(__dirname, "../../", `${location}/theme.css`);
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const resolvedLocation = path.resolve(__dirname, "../../", `${location}/theme.css`);
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const data = await fs.readFile(resolvedLocation);
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return data;
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}
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async function appendVariablesToCSS(variables, cssSource) {
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return cssSource + `:root{\n${Object.entries(variables).reduce((acc, [key, value]) => acc + `--${key}: ${value};\n`, "")} }\n\n`;
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function getRootSectionWithVariables(variables) {
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return `:root{\n${Object.entries(variables).reduce((acc, [key, value]) => acc + `--${key}: ${value};\n`, "")} }\n\n`;
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}
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function appendVariablesToCSS(variables, cssSource) {
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return cssSource + getRootSectionWithVariables(variables);
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}
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function findLocationFromThemeName(name, locations) {
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const themeLocation = locations.find(location => {
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const manifest = require(`${location}/manifest.json`);
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if (manifest.name === name) {
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return true;
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}
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});
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if (!themeLocation) {
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throw new Error(`Cannot find location from theme name "${name}"`);
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}
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return themeLocation;
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}
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function findManifestFromThemeName(name, locations) {
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for (const location of locations) {
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const manifest = require(`${location}/manifest.json`);
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if (manifest.name === name) {
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return manifest;
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}
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}
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throw new Error(`Cannot find manifest from theme name "${name}"`);
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}
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function parseBundle(bundle) {
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@ -68,11 +96,20 @@ function parseBundle(bundle) {
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module.exports = function buildThemes(options) {
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let manifest, variants, defaultDark, defaultLight;
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let isDevelopment = false;
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const virtualModuleId = '@theme/'
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const resolvedVirtualModuleId = '\0' + virtualModuleId;
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return {
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name: "build-themes",
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enforce: "pre",
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configResolved(config) {
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if (config.command === "serve") {
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isDevelopment = true;
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}
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},
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async buildStart() {
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const { manifestLocations } = options;
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for (const location of manifestLocations) {
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@ -106,69 +143,108 @@ module.exports = function buildThemes(options) {
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}
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},
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resolveId(id) {
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if (id.startsWith(virtualModuleId)) {
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return isDevelopment? '\0' + id: false;
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}
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},
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async load(id) {
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const result = id.match(/(.+)\/theme.css\?variant=(.+)/);
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if (result) {
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const [, location, variant] = result;
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const cssSource = await readCSSSource(location);
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const config = variants[variant];
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return await appendVariablesToCSS(config.variables, cssSource);
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}
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return null;
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},
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transformIndexHtml(_, ctx) {
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let darkThemeLocation, lightThemeLocation;
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for (const [, bundle] of Object.entries(ctx.bundle)) {
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if (bundle.name === defaultDark) {
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darkThemeLocation = bundle.fileName;
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}
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if (bundle.name === defaultLight) {
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lightThemeLocation = bundle.fileName;
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if (isDevelopment) {
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if (id.startsWith(resolvedVirtualModuleId)) {
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let [theme, variant, file] = id.substr(resolvedVirtualModuleId.length).split("/");
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if (theme === "default") {
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theme = "Element";
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}
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if (!variant || variant === "default") {
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variant = "light";
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}
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if (!file) {
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file = "index.js";
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}
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switch (file) {
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case "index.js": {
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const location = findLocationFromThemeName(theme, options.manifestLocations);
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return `import "${path.resolve(`${location}/theme.css`)}";` +
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`import "@theme/${theme}/${variant}/variables.css"`;
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}
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case "variables.css": {
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const manifest = findManifestFromThemeName(theme, options.manifestLocations);
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const variables = manifest.values.variants[variant].variables;
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const css = getRootSectionWithVariables(variables);
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return css;
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}
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}
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}
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}
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return [
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{
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tag: "link",
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attrs: {
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rel: "stylesheet",
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type: "text/css",
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media: "(prefers-color-scheme: dark)",
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href: `./${darkThemeLocation}`,
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}
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},
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{
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tag: "link",
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attrs: {
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rel: "stylesheet",
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type: "text/css",
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media: "(prefers-color-scheme: light)",
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href: `./${lightThemeLocation}`,
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}
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},
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];
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},
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else {
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const result = id.match(/(.+)\/theme.css\?variant=(.+)/);
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if (result) {
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const [, location, variant] = result;
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const cssSource = await readCSSSource(location);
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const config = variants[variant];
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return await appendVariablesToCSS(config.variables, cssSource);
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}
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return null;
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}
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},
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generateBundle(_, bundle) {
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const { assetMap, chunkMap, runtimeThemeChunk } = parseBundle(bundle);
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for (const [location, chunkArray] of chunkMap) {
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const manifest = require(`${location}/manifest.json`);
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const compiledVariables = options.compiledVariables.get(location);
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const derivedVariables = compiledVariables["derived-variables"];
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const icon = compiledVariables["icon"];
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manifest.source = {
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"built-asset": chunkArray.map(chunk => assetMap.get(chunk.fileName).fileName),
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"runtime-asset": assetMap.get(runtimeThemeChunk.fileName).fileName,
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"derived-variables": derivedVariables,
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"icon": icon
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};
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const name = `theme-${manifest.name}.json`;
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this.emitFile({
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type: "asset",
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name,
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source: JSON.stringify(manifest),
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});
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transformIndexHtml(_, ctx) {
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if (isDevelopment) {
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// Don't add default stylesheets to index.html on dev
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return;
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}
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let darkThemeLocation, lightThemeLocation;
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for (const [, bundle] of Object.entries(ctx.bundle)) {
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if (bundle.name === defaultDark) {
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darkThemeLocation = bundle.fileName;
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}
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if (bundle.name === defaultLight) {
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lightThemeLocation = bundle.fileName;
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}
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}
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return [
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{
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tag: "link",
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attrs: {
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rel: "stylesheet",
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type: "text/css",
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media: "(prefers-color-scheme: dark)",
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href: `./${darkThemeLocation}`,
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}
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},
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{
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tag: "link",
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attrs: {
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rel: "stylesheet",
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type: "text/css",
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media: "(prefers-color-scheme: light)",
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href: `./${lightThemeLocation}`,
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}
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},
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];
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},
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generateBundle(_, bundle) {
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const { assetMap, chunkMap, runtimeThemeChunk } = parseBundle(bundle);
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for (const [location, chunkArray] of chunkMap) {
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const manifest = require(`${location}/manifest.json`);
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const compiledVariables = options.compiledVariables.get(location);
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const derivedVariables = compiledVariables["derived-variables"];
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const icon = compiledVariables["icon"];
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manifest.source = {
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"built-asset": chunkArray.map(chunk => assetMap.get(chunk.fileName).fileName),
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"runtime-asset": assetMap.get(runtimeThemeChunk.fileName).fileName,
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"derived-variables": derivedVariables,
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"icon": icon
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};
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const name = `theme-${manifest.name}.json`;
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this.emitFile({
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type: "asset",
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name,
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source: JSON.stringify(manifest),
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});
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}
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}
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}
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}
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