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import path from "path";
import { fileURLToPath, pathToFileURL } from "../utils/url";
import { computeContentHash } from "../crypto";
import * as sass from "sass";
import { createFilter } from "@rollup/pluginutils";
/**
* @warning Rollup is added as a "devDependency",
* so no actual symbols should be imported.
* Interfaces and non-concrete types are ok.
*/
import type { Plugin as RollupPlugin, TransformResult } from "rollup";
import type { RollupPluginSassOptions, RollupPluginSassState } from "./types";
import {
getImporterListLegacy,
getImporterListModern,
} from "./utils/getImporterList";
import {
processRenderResponse,
INSERT_STYLE_ID,
} from "./utils/processRenderResponse";
import insertStyle from "./insertStyle";
import { getSyntax } from "./utils/helpers";
import nodeFsAdapter from "../node-fs-adapter";
const MATCH_SASS_FILENAME_RE = /\.sass$/;
const defaultIncludes = ["**/*.sass", "**/*.scss", "**/*.css"];
const defaultExcludes = "";
const defaultApi = "modern";
// Simple console logger for sass compile messages
const consoleLogger: sass.Logger = {
debug(message: string) {
console.debug(`[Sass debug]: ${message}`);
},
warn(message: string, { deprecation, span, stack }: sass.LoggerWarnOptions) {
console.warn(
`[${deprecation ? "Sass deprecation" : "Sass warning"}]: ${message}`,
);
if (span && stack) {
console.log(` ${span.context}at ${stack}`);
}
},
};
// Typescript syntax for CommonJs "default exports" compatible export
// @reference https://www.typescriptlang.org/docs/handbook/modules.html#export--and-import--require
export default function plugin(
options = {} as RollupPluginSassOptions,
): RollupPlugin {
const pluginOptions: RollupPluginSassOptions = Object.assign(
{
runtime: sass,
output: false,
insert: false,
api: defaultApi,
},
options,
);
const {
include = defaultIncludes,
exclude = defaultExcludes,
runtime: sassRuntime,
shouldExtract = () => false,
getExtractNameAndUrl = (url) => ({ name: url, url }),
} = pluginOptions;
const filter = createFilter(include, exclude);
const pluginState: RollupPluginSassState = {
styles: [],
styleMaps: {},
};
return {
name: "rollup-plugin-sass",
/** @see https://rollupjs.org/plugin-development/#resolveid */
resolveId(source) {
if (source === INSERT_STYLE_ID) {
return INSERT_STYLE_ID;
}
},
/** @see https://rollupjs.org/plugin-development/#load */
load(id) {
if (id === INSERT_STYLE_ID) {
return `export default ${insertStyle.toString()}`;
}
},
async transform(code, filePath) {
if (!filter(filePath)) {
return;
}
// @ts-ignore
const fs = options.fs || globalThis.__rollupFs || nodeFsAdapter;
const paths = [path.dirname(filePath), process.cwd()];
const { styleMaps, styles } = pluginState;
// Setup resolved css output bundle tracking, for use later in `generateBundle` method.
// ----
Eif (!styleMaps[filePath]) {
const mapEntry = {
id: filePath,
content: "", // Populated after sass compilation
};
styleMaps[filePath] = mapEntry;
styles.push(mapEntry);
}
switch (pluginOptions.api) {
case "modern": {
const { options: incomingSassOptions } = pluginOptions;
const invokeSass = async (
url: URL,
source: string,
): Promise<sass.CompileResult> => {
const compileOptions: sass.StringOptions<"async"> = {
...incomingSassOptions,
syntax: getSyntax(path.extname(url.pathname)),
loadPaths: (incomingSassOptions?.loadPaths || []).concat(paths),
importers: getImporterListModern(
incomingSassOptions?.importers,
fs,
),
url,
/** force sourceMap because right now rollup outputOptions are not available */
sourceMap: true,
logger: consoleLogger,
};
const compileResult: sass.CompileResult =
await sassRuntime.compileStringAsync(source, compileOptions);
const { loadedUrls } = compileResult;
loadedUrls.forEach((filePath) => {
this.addWatchFile(fileURLToPath(filePath));
});
return compileResult;
};
/**
* Using {@link compileStringAsync} to keep support of prepend information on each file,
* basically `data` option
*/
const source = incomingSassOptions?.data
? `${incomingSassOptions.data}${code}`
: code;
const compileResult: sass.CompileResult = await invokeSass(
pathToFileURL(filePath) as URL,
source,
);
const codeResult = await processRenderResponse(
pluginOptions,
filePath,
pluginState,
compileResult.css.toString().trim(),
);
const { sourceMap } = compileResult;
return {
code: codeResult || "",
map: sourceMap ? sourceMap : undefined,
} as TransformResult;
}
case "legacy": {
const { options: incomingSassOptions } = pluginOptions;
const renderOptions: sass.LegacyOptions<"async"> = {
...incomingSassOptions,
file: filePath,
data:
incomingSassOptions?.data && `${incomingSassOptions.data}${code}`,
indentedSyntax: MATCH_SASS_FILENAME_RE.test(filePath),
includePaths: (incomingSassOptions?.includePaths || []).concat(
paths,
),
importer: getImporterListLegacy(incomingSassOptions?.importer, fs),
logger: consoleLogger,
};
const res: sass.LegacyResult = await promisify(
sassRuntime.render.bind(sassRuntime),
)(renderOptions);
const codeResult = await processRenderResponse(
pluginOptions,
filePath,
pluginState,
res.css.toString().trim(),
);
// @todo Do we need to filter this call so it only occurs when rollup is in 'watch' mode?
res.stats.includedFiles.forEach((filePath: string) => {
this.addWatchFile(filePath);
});
// @note do not `catch` here - let error propagate to rollup level.
return {
code: codeResult || "",
map: { mappings: res.map ? res.map.toString() : "" },
} as TransformResult;
}
}
},
async generateBundle(outputOptions, _, isWrite) {
const fs = options.fs || globalThis.__rollupFs || nodeFsAdapter;
const { styles } = pluginState;
const { output, insert } = pluginOptions;
Eif (!isWrite || (!insert && (!styles.length || output === false))) {
return;
}
const css = styles.map((style) => style.content).join("");
if (typeof output === "string") {
await fs.mkdir(path.dirname(output), { recursive: true });
await fs.writeFile(output, css);
return;
}
if (typeof output === "function") {
output(css, styles);
return;
}
if (!insert && outputOptions.file && output === true) {
let dest = outputOptions.file;
if (dest.endsWith(".js") || dest.endsWith(".ts")) {
dest = dest.slice(0, -3);
}
dest = `${dest}.css`;
await fs.mkdir(path.dirname(dest), { recursive: true });
await fs.writeFile(dest, css);
return;
}
for (const { id, content } of styles) {
if (id && content && shouldExtract(id, content)) {
const contentHash = await computeContentHash(content);
const { name } = getExtractNameAndUrl(id, contentHash);
this.emitFile({
type: "asset",
fileName: name,
source: content,
});
}
}
},
};
}
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