swaf/src/frontend/CopyAssetPreCompiler.ts

import {promises as fs} from "fs";
import path from "path";

import {logger} from "../Logger.js";
import AssetPreCompiler from "./AssetPreCompiler.js";

export default class CopyAssetPreCompiler extends AssetPreCompiler {
    protected readonly actualTargetDir: string;

    public constructor(
        targetDir: string,
        assetType: string,
        extension: string,
        additionalFallbackAssetPaths: string[] = [],
        outputToPublic: boolean = true,
        overrideTargetAssetType?: string,
    ) {
        super(targetDir, assetType, extension, outputToPublic, ...additionalFallbackAssetPaths);
        this.actualTargetDir = overrideTargetAssetType ?
            path.join(targetDir, overrideTargetAssetType) :
            this.targetDir;
    }

    public async preCompile(canonicalName: string): Promise<void> {
        const inputFile = await this.resolveFileFromCanonicalNameOrFail(canonicalName);
        const outputFile = path.join(this.actualTargetDir, canonicalName);
        logger.info('Copying', inputFile, '->', outputFile);
        await fs.mkdir(path.dirname(outputFile), {recursive: true});
        await fs.copyFile(inputFile, outputFile);
    }
}