'use strict';
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const path = require('path');
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const fs = require('fs');
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const mkdirp = require('mkdirp');
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const calcHash = require('../lib/hash');
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const paths = require('../lib/paths');
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const getFile = require('../lib/get-file');
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const getTargetDir = paths.getTargetDir;
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const getAssetsPath = paths.getAssetsPath;
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const normalize = paths.normalize;
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const getHashName = (file, options) =>
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(options && options.append ? (`${path.basename(file.path, path.extname(file.path))}_`) : '')
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+ calcHash(file.contents, options)
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+ path.extname(file.path);
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/**
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* Copy images from readed from url() to an specific assets destination
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* (`assetsPath`) and fix url() according to that path.
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* You can rename the assets by a hash or keep the real filename.
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*
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* Option assetsPath is require and is relative to the css destination (`to`)
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*
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* @type {PostcssUrl~UrlProcessor}
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* @param {PostcssUrl~Asset} asset
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* @param {PostcssUrl~Dir} dir
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* @param {PostcssUrl~Option} options
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* @param {PostcssUrl~Decl} decl
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* @param {Function} warn
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* @param {Result} result
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* @param {Function} addDependency
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*
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* @returns {String|Undefined}
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*/
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module.exports = function processCopy(asset, dir, options, decl, warn, result, addDependency) {
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if (!options.assetsPath && dir.from === dir.to) {
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warn('Option `to` of postcss is required, ignoring');
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return;
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}
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const file = getFile(asset, options, dir, warn);
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if (!file) return;
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const assetRelativePath = options.useHash
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? getHashName(file, options.hashOptions)
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: asset.relativePath;
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const targetDir = getTargetDir(dir);
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const newAssetBaseDir = getAssetsPath(targetDir, options.assetsPath);
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const newAssetPath = path.join(newAssetBaseDir, assetRelativePath);
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const newRelativeAssetPath = normalize(
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path.relative(targetDir, newAssetPath)
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);
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mkdirp.sync(path.dirname(newAssetPath));
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if (!fs.existsSync(newAssetPath)) {
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fs.writeFileSync(newAssetPath, file.contents);
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}
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addDependency(file.path);
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return `${newRelativeAssetPath}${asset.search}${asset.hash}`;
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};
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