paths.js
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'use strict';
const path = require('path');
const url = require('url');
/**
* Normalazing result url, before replace decl value
*
* @param {String} assetUrl
* @returns {String}
*/
const normalize = (assetUrl) => {
assetUrl = path.normalize(assetUrl);
return path.sep === '\\' ? assetUrl.replace(/\\/g, '\/') : assetUrl;
};
/**
* @param {String} assetUrl
* @returns {Boolean}
*/
const isUrlWithoutPathname = (assetUrl) => {
return assetUrl[0] === '#'
|| assetUrl.indexOf('%23') === 0
|| assetUrl.indexOf('data:') === 0
|| /^[a-z]+:\/\//.test(assetUrl)
|| /^\/\//.test(assetUrl);
};
/**
* Check if url is absolute, hash or data-uri
*
* @param {String} assetUrl
* @param {PostcssUrl~Options} options
* @returns {Boolean}
*/
const isUrlShouldBeIgnored = (assetUrl, options) => {
const isAbsolutePath = assetUrl[0] === '/';
const isStartsWithTilde = assetUrl[0] === '~';
return isUrlWithoutPathname(assetUrl) || ((isAbsolutePath || isStartsWithTilde) && !options.basePath);
};
/**
* @param {String} baseDir - absolute target path
* @param {String} assetsPath - extend asset path, can be absolute path
* @param {String} relative - current relative asset path
* @returns {String}
*/
const getAssetsPath = (baseDir, assetsPath, relative) =>
path.resolve(baseDir, assetsPath || '', relative || '');
/**
* Target path, output base dir
*
* @param {Dir} dir
* @returns {String}
*/
const getTargetDir = (dir) =>
dir.from !== dir.to ? dir.to : process.cwd();
/**
* Stylesheet file path from decl
*
* @param {Decl} decl
* @returns {String}
*/
const getPathDeclFile = (decl) =>
decl.source && decl.source.input && decl.source.input.file;
/**
* Stylesheet file dir from decl
*
* @param {Decl} decl
* @returns {String}
*/
const getDirDeclFile = (decl) => {
const filename = getPathDeclFile(decl);
return filename ? path.dirname(filename) : process.cwd();
};
/**
* Returns paths list, where we can find assets file
*
* @param {String[]|String} basePath - base paths where trying search to assets file
* @param {Dir} dirFrom
* @param {String} relPath - relative asset path
* @returns {String[]}
*/
const getPathByBasePath = (basePath, dirFrom, relPath) => {
if (relPath[0] === '/') {
relPath = `.${relPath}`;
}
basePath = !Array.isArray(basePath) ? [basePath] : basePath;
return basePath.map((pathItem) =>
getAssetsPath(dirFrom, pathItem, relPath)
);
};
/**
* Preparing asset paths and data
*
* @param {String} assetUrl
* @param {PostcssUrl~Dir} dir
* @param {Decl} decl
* @returns {PostcssUrl~Asset}
*/
const prepareAsset = (assetUrl, dir, decl) => {
const parsedUrl = url.parse(assetUrl);
const pathname = !isUrlWithoutPathname(assetUrl) ? parsedUrl.pathname : null;
const absolutePath = pathname
? path.resolve(path.join(dir.file, pathname))
: getPathDeclFile(decl);
return {
url: assetUrl,
originUrl: assetUrl,
pathname,
absolutePath: absolutePath || dir.from,
relativePath: absolutePath ? path.relative(dir.from, absolutePath) : '.',
search: (parsedUrl.search || ''),
hash: (parsedUrl.hash || '')
};
};
module.exports = {
normalize,
prepareAsset,
getAssetsPath,
getDirDeclFile,
getPathDeclFile,
getTargetDir,
getPathByBasePath,
isUrlShouldBeIgnored
};
/**
* @typedef {Object} PostcssUrl~Asset
* @property {String} url - origin asset url
* @property {String} name - parsed asset filename
* @property {String} absolutePath - absolute asset path
* @property {String} relativePath - relative asset path (relative to target dir)
* @property {String} search - search from url, ex. ?query=1
* @property {String} hash - hash from url
*/
/**
* @typedef {Object} PostcssUrl~Dir
* @property {String} from - dirname from postcss option 'from'
* @property {String} to - dirname from postcss option 'to'
* @property {String} file - decl file dirname (css file)
*/