initial commit; build alias support

.gitignore

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+/node_modules/
+/.idea/

index.js

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+'use strict';
+
+var path = require('path'),
+	fs = require('fs'),
+	es = require('event-stream'),
+	gulp = require('gulp'),
+	cheerio = require('cheerio'),
+	sprintf = require('sprintf'),
+
+	/**
+	 * Zkontroluje pøístup k souboru a vyhodí chybu v pøípadì, že nelze pøeèíst.
+	 * @param file	Název souboru
+	 */
+	validateFile = function (file) {
+		fs.accessSync && fs.accessSync(file, fs.R_OK);
+		if (fs.existsSync && !fs.existsSync(file)) {
+			throw new Error(sprintf('ENOENT, no such file or directory \'%s\'', file));
+		}
+	},
+
+	/**
+	 * Zkonvertuje pole názvù souborù na zdrojový stream Gulpu
+	 * @param cwd	Pracovní adresáø
+	 * @returns {*}
+	 */
+	gulpSources = function (cwd) {
+		cwd = cwd || '';
+		var pathStream = es.through(),
+			fileStream = es.through();
+		pathStream.pipe(es.writeArray(function (err, files) {
+			files = files.map(function (file) {
+				file = path.join(cwd, file);
+				validateFile(file);
+				return file;
+			});
+			gulp.src(files).pipe(fileStream);
+		}));
+		return es.duplex(pathStream, fileStream);
+	},
+
+	/**
+	 * Builder funkce pro script tag
+	 * @param builder	Builder funkce
+	 * @param minified	Použít minifikovanou verzi sriptu
+	 * @returns {Function}
+	 */
+	scriptBuilder = function (builder, minified) {
+		minified = minified !== false;
+		var extractSrc = function (line) {
+			var element = cheerio('script[src]', line) || cheerio('<script></script>');
+			return minified && element.attr('data-build-src') || element.attr('data-abs-src') || element.attr('src');
+		};
+		return function (block) {
+			var templateScript = function (path) {
+					var element = cheerio('script', '<script></script>');
+					element.attr('src', path);
+					return block.indent + cheerio.html(element);
+				},
+				extractScriptStream = es.mapSync(extractSrc),
+				templateScriptStream = es.mapSync(templateScript);
+			block.pipe(extractScriptStream);
+			templateScriptStream.pipe(block);
+			builder(es.duplex(templateScriptStream, extractScriptStream));
+		};
+	},
+
+	/**
+	 * Builder funkce pro link tag
+	 * @param builder	Builder funkce
+	 * @param minified	Použít minifikovanou verzi sriptu
+	 * @returns {Function}
+	 */
+	stylesheetBuilder = function (builder, minified) {
+		minified = minified !== false;
+		var extractLink = function (line) {
+			var element = cheerio('link[rel=stylesheet][href]', line) || cheerio('<link>');
+			return minified && element.attr('data-build-href') ||  element.attr('data-href') || element.attr('href');
+		};
+		return function (block) {
+			var templateLink = function (path) {
+					var element = cheerio('link', '<link>');
+					element.attr('rel', 'stylesheet');
+					element.attr('href', path);
+					return block.indent + cheerio.html(element);
+				},
+				extractLinkStream = es.mapSync(extractLink),
+				templateLinkStream = es.mapSync(templateLink);
+			block.pipe(extractLinkStream);
+			templateLinkStream.pipe(block);
+			builder(es.duplex(templateLinkStream, extractLinkStream));
+		};
+	};
+
+module.exports = {
+	/**
+	 * Builder pro vytvoøení streamu se seznamem všech skriptù
+	 * @param stream	Výstupní stream
+	 * @param cwd		Pracovní adresáø
+	 * @param minified	Použít minifikované verze sriptù
+	 * @returns {Function}
+	 */
+	scriptStream: function (stream, cwd, minified) {
+		return scriptBuilder(function (block) {
+			block.pipe(gulpSources(cwd)).pipe(stream);
+		}, minified);
+	},
+
+	/**
+	 * Builder pro nahrazení sekce scriptù za souhrnný script tag
+	 * @param src	Hodnota src atributu
+	 * @returns {Function}
+	 */
+	scriptReplace: function (src) {
+		return scriptBuilder(function (block) {
+			block.end(src);
+		});
+	},
+
+	/**
+	 * Builder pro vytvoøení streamu se seznamem všech souborù se styly
+	 * @param stream	Výstupní stream
+	 * @param cwd		Pracovní adresáø
+	 * @param minified	Použít minifikované verze souborù se styly
+	 * @returns {Function}
+	 */
+	stylesheetStream: function (stream, cwd, minified) {
+		return stylesheetBuilder(function (block) {
+			block.pipe(gulpSources(cwd)).pipe(stream);
+		}, minified);
+	},
+
+	/**
+	 * Builder pro nahrazení sekce stylù za souhrnný script link
+	 * @param href	Hodnota href atributu
+	 * @returns {Function}
+	 */
+	stylesheetReplace: function (href) {
+		return stylesheetBuilder(function (block) {
+			block.end(href);
+		});
+	}
+};

package.json

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+{
+  "name": "htmlbuild-functions",
+  "version": "0.0.1",
+  "description": "",
+  "main": "index.js",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/winsite/htmlbuild-functions.git"
+  },
+  "author": "Winsite a.s.",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/winsite/htmlbuild-functions/issues"
+  },
+  "homepage": "https://github.com/winsite/htmlbuild-functions#readme",
+  "devDependencies": {
+    "cheerio": "^0.19.0",
+    "event-stream": "^3.3.1",
+    "gulp": "^3.9.0",
+    "sprintf": "^0.1.5"
+  }
+}