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index.js
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index.js
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'use strict';
var _ = require('underscore');
var gutil = require('gulp-util');
var PluginError = gutil.PluginError;
var through = require('through2');
var path = require('path');
var PLUGIN_NAME = 'gulp-rev-collector';
var defaults = {
revSuffix: '-[0-9a-f]{8,10}-?',
extMap: {
'.scss': '.css',
'.less': '.css',
'.jsx': '.js'
},
ignoreKeys: []
};
function _getManifestData(file, opts) {
var data;
var ext = path.extname(file.path);
if (ext === '.json') {
data = {};
var json = {};
try {
var content = file.contents.toString('utf8');
if (content) {
json = JSON.parse(content);
}
} catch (x) {
this.emit('error', new PluginError(PLUGIN_NAME, x));
return;
}
if (_.isObject(json)) {
var needIgnoreKeys = opts.ignoreKeys && opts.ignoreKeys.length;
Object.keys(json).forEach(function (key) {
if(needIgnoreKeys && opts.ignoreKeys.indexOf(key)!=-1){
return;
}
var v = json[key] || '';
if (!_.isString(v) || !v) {
return;
}
var cleanReplacement = path.basename(v).replace(new RegExp( opts.revSuffix ), '' );
if (!~[
path.basename(key),
_mapExtnames(path.basename(key), opts)
].indexOf(cleanReplacement)
){
return;
}
data[key] = v;
});
}
}
return data;
}
// Issue #30 extnames normalisation
function _mapExtnames(filename, opts) {
var fileExt = path.extname(filename);
Object.keys(opts.extMap).forEach(function (ext) {
if (fileExt === ext) {
filename = filename.replace(new RegExp( '\\' + ext + '$' ), opts.extMap[ext]);
}
});
return filename;
}
function escPathPattern(pattern) {
return pattern.replace(/[\-\[\]\{\}\(\)\*\+\?\.\^\$\|\/\\]/g, "\\$&");
}
function closeDirBySep(dirname) {
return dirname + (!dirname || new RegExp( escPathPattern('/') + '$' ).test(dirname) ? '' : '/');
}
function revCollector(opts) {
opts = _.defaults((opts || {}), defaults);
var manifest = {};
var mutables = [];
return through.obj(function (file, enc, cb) {
if (!file.isNull()) {
var mData = _getManifestData.call(this, file, opts);
if (mData) {
_.extend( manifest, mData );
} else {
mutables.push(file);
}
}
cb();
}, function (cb) {
var changes = [];
var dirReplacements = [];
if ( _.isObject(opts.dirReplacements) ) {
Object.keys(opts.dirReplacements).forEach(function (srcDirname) {
dirReplacements.push({
dirRX: escPathPattern( closeDirBySep(srcDirname) ),
dirRpl: opts.dirReplacements[srcDirname]
});
});
}
if (opts.collectedManifest) {
this.push(
new gutil.File({
path: opts.collectedManifest,
contents: new Buffer(JSON.stringify(manifest, null, "\t"))
})
);
}
for (var key in manifest) {
var patterns = [ escPathPattern(key) ];
if (opts.replaceReved) {
var patternExt = path.extname(key);
if (patternExt in opts.extMap) {
patternExt = '(' + escPathPattern(patternExt) + '|' + escPathPattern(opts.extMap[patternExt]) + ')';
} else {
patternExt = escPathPattern(patternExt);
}
patterns.push( escPathPattern( (path.dirname(key) === '.' ? '' : closeDirBySep(path.dirname(key)) ) )
+ path.basename(key, path.extname(key))
.split('.')
.map(function(part){
return escPathPattern(part) + '(' + opts.revSuffix + ')?';
})
.join('\\.')
+ patternExt
);
}
if ( dirReplacements.length ) {
dirReplacements.forEach(function (dirRule) {
patterns.forEach(function (pattern) {
changes.push({
regexp: new RegExp( dirRule.dirRX + pattern, 'g' ),
patternLength: (dirRule.dirRX + pattern).length,
replacement: _.isFunction(dirRule.dirRpl)
? dirRule.dirRpl(manifest[key])
: closeDirBySep(dirRule.dirRpl) + manifest[key]
});
});
});
} else {
patterns.forEach(function (pattern) {
// without dirReplacements we must leave asset filenames with prefixes in its original state
var prefixDelim = '([\/\\\\\'"';
// if dir part in pattern exists, all exsotoic symbols should be correct processed using dirReplacements
if (/[\\\\\/]/.test(pattern)) {
prefixDelim += '\(=';
} else {
if (!/[\(\)]/.test(pattern)) {
prefixDelim += '\(';
}
if (!~pattern.indexOf('=')) {
prefixDelim += '=';
}
}
prefixDelim += '])';
changes.push({
regexp: new RegExp( prefixDelim + pattern, 'g' ),
patternLength: pattern.length,
replacement: '$1' + manifest[key]
});
});
}
}
// Replace longer patterns first
// e.g. match `script.js.map` before `script.js`
changes.sort(
function(a, b) {
return b.patternLength - a.patternLength;
}
);
// concat path config
var concatPrefixes = _.isObject(opts.concatPrefixes) ? opts.concatPrefixes : false;
var concatPrefixMap = getConcatPrefixMap(concatPrefixes);
mutables.forEach(function (file){
if (!file.isNull()) {
var src = file.contents.toString('utf8');
changes.forEach(function (r) {
src = src.replace(r.regexp, r.replacement);
});
// deal concat path
if(concatPrefixMap && concatPrefixMap.length){
src = replaceAllConcat(src, concatPrefixMap, changes);
}
file.contents = new Buffer(src);
}
this.push(file);
}, this);
cb();
});
}
/**
* getConcatPrefixMap
* @param {object} concatPrefixes
* @return {[{k: string, v: string}]}
*/
function getConcatPrefixMap(concatPrefixes){
var arr = [];
if(_.isObject(concatPrefixes)){
arr = Object.keys(concatPrefixes).map(function(k){
return {
k: k,
v: concatPrefixes[k]
};
});
arr.length && arr.sort(function(a, b){
return b.length -a.length;
});
}
return arr;
}
/**
* replaceAllConcat
* @param {string} src
* @param {array} concatPrefixMap
* @param {array} changes
* @returns {string}
*/
function replaceAllConcat(src, concatPrefixMap, changes){
if(!_.isString(src) || !(_.isArray(concatPrefixMap) && concatPrefixMap.length) || !_.isArray(changes)){
return src;
}
// url path doesn't include quotes & space inner :
// [√] js/a/b/c.js
// [×] js/'a/"b/c.js
// [×] js/ a/b/c.js
var normalPathPettern = '[^\\f\\n\\r\\t\\v\'"`]';
concatPrefixMap.forEach(function(cpfObj){
var cpfKey = cpfObj.k;
var cpfValue = cpfObj.v;
if(!_.isString(cpfKey) || !_.isString(cpfValue)){
return false;
}
var cpfPattern = escPathPattern(cpfKey);
// start with prefix and end with quotes
var concatPattern = cpfPattern + '(' + normalPathPettern + '+,' + normalPathPettern + '+)+[\'`"]';
var concatRegEx = new RegExp(concatPattern, 'g');
var concatArr = src.match(concatRegEx);
// console.log('\nRegex:' + concatRegEx + ' Matched-length: ' + (concatArr && concatArr.length || 0));
// concatArr && console.log(JSON.stringify(concatArr, null, 2));
if(concatArr && concatArr.length){
// format & unique
concatArr = _.uniq(concatArr.map(function(s){
return s.replace(/(^['"`])|(['"`]$)/g, '').trim();
}));
// longer first
concatArr.sort(function(a, b){
return b.length - a.length;
});
// console.log('After: Format & Unique & Sort: Format-length: ' + concatArr.length);
// console.log(JSON.stringify(concatArr, null, 2));
concatArr.forEach(function(s){
var cRevInfo = getConcatRevInfo(s, {
cpfKey: cpfKey,
cpfValue: cpfValue,
changes: changes
});
if(cRevInfo.regexp){
// console.log(cRevInfo.regexp + ' -> ' + cRevInfo.replacement);
src = src.replace(cRevInfo.regexp, cRevInfo.replacement);
}else{
// console.log('Skip replace: ' + s);
}
});
}
});
return src;
}
/**
*
* @param str
* @param opts
* opts.cpfKey {string}
* opts.cpfValue {string}
* opts.changes {array}
* @returns {{regexp: RegExp|null, replacement: string}}
*/
function getConcatRevInfo(str, opts){
opts = _.isObject(opts) ? opts : {};
var cpfKey = opts.cpfKey || '';
var cpfValue = opts.cpfValue || '';
var changes = opts.changes || [];
if(!_.isString(cpfKey) || !_.isString(cpfKey) || !(_.isArray(changes) && changes.length)){
return {
regexp: null,
replacement: str
};
}
var _str = str.replace(/['"`]$/g, '').trim();
var res = {
regexp: new RegExp(escPathPattern(_str), 'g'),
replacement: _str
};
var cpfPattern = escPathPattern(cpfKey);
res.replacement = _str.split(',').map(function(s, i){
var _s;
// 'add-prefix': add prefix to path (set complete path to reversion)
var isFirst = 0 === i;
if(isFirst){
_s = s.replace(new RegExp(cpfPattern, 'g'), cpfValue);
}else{
_s = cpfValue + s;
}
// 'rev-name': reversion name in complete path after 'add-prefix'
changes.forEach(function (r) {
_s = _s.replace(r.regexp, r.replacement);
});
// 'delete-prefix': delete prefix from path
var delStart = isFirst ? cpfKey : '';
var cpfvPtn = escPathPattern(cpfValue);
_s = _s.replace(new RegExp(cpfvPtn, 'g'), delStart);
return _s;
}).join(',');
if(res.replacement === _str){
res.regexp = null;
}
return res;
}
module.exports = revCollector;