diff options
Diffstat (limited to 'node_modules/uglify-js/lib/minify.js')
| -rw-r--r-- | node_modules/uglify-js/lib/minify.js | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/node_modules/uglify-js/lib/minify.js b/node_modules/uglify-js/lib/minify.js new file mode 100644 index 0000000..ab397f5 --- /dev/null +++ b/node_modules/uglify-js/lib/minify.js @@ -0,0 +1,263 @@ +"use strict"; + +var to_ascii, to_base64; +if (typeof Buffer == "undefined") { + to_ascii = atob; + to_base64 = btoa; +} else if (typeof Buffer.alloc == "undefined") { + to_ascii = function(b64) { + return new Buffer(b64, "base64").toString(); + }; + to_base64 = function(str) { + return new Buffer(str).toString("base64"); + }; +} else { + to_ascii = function(b64) { + return Buffer.from(b64, "base64").toString(); + }; + to_base64 = function(str) { + return Buffer.from(str).toString("base64"); + }; +} + +function read_source_map(name, toplevel) { + var comments = toplevel.end.comments_after; + for (var i = comments.length; --i >= 0;) { + var comment = comments[i]; + if (comment.type != "comment1") break; + var match = /^# ([^\s=]+)=(\S+)\s*$/.exec(comment.value); + if (!match) break; + if (match[1] == "sourceMappingURL") { + match = /^data:application\/json(;.*?)?;base64,(\S+)$/.exec(match[2]); + if (!match) break; + return to_ascii(match[2]); + } + } + AST_Node.warn("inline source map not found: " + name); +} + +function parse_source_map(content) { + try { + return JSON.parse(content); + } catch (ex) { + throw new Error("invalid input source map: " + content); + } +} + +function set_shorthand(name, options, keys) { + if (options[name]) { + keys.forEach(function(key) { + if (options[key]) { + if (typeof options[key] != "object") options[key] = {}; + if (!(name in options[key])) options[key][name] = options[name]; + } + }); + } +} + +function init_cache(cache) { + if (!cache) return; + if (!("props" in cache)) { + cache.props = new Dictionary(); + } else if (!(cache.props instanceof Dictionary)) { + cache.props = Dictionary.fromObject(cache.props); + } +} + +function to_json(cache) { + return { + props: cache.props.toObject() + }; +} + +function minify(files, options) { + try { + options = defaults(options, { + compress: {}, + enclose: false, + ie8: false, + keep_fnames: false, + mangle: {}, + nameCache: null, + output: {}, + parse: {}, + rename: undefined, + sourceMap: false, + timings: false, + toplevel: false, + warnings: false, + wrap: false, + }, true); + var timings = options.timings && { + start: Date.now() + }; + if (options.rename === undefined) { + options.rename = options.compress && options.mangle; + } + set_shorthand("ie8", options, [ "compress", "mangle", "output" ]); + set_shorthand("keep_fnames", options, [ "compress", "mangle" ]); + set_shorthand("toplevel", options, [ "compress", "mangle" ]); + var quoted_props; + if (options.mangle) { + options.mangle = defaults(options.mangle, { + cache: options.nameCache && (options.nameCache.vars || {}), + eval: false, + ie8: false, + keep_fnames: false, + properties: false, + reserved: [], + toplevel: false, + }, true); + if (options.mangle.properties) { + if (typeof options.mangle.properties != "object") { + options.mangle.properties = {}; + } + if (options.mangle.properties.keep_quoted) { + quoted_props = options.mangle.properties.reserved; + if (!Array.isArray(quoted_props)) quoted_props = []; + options.mangle.properties.reserved = quoted_props; + } + if (options.nameCache && !("cache" in options.mangle.properties)) { + options.mangle.properties.cache = options.nameCache.props || {}; + } + } + init_cache(options.mangle.cache); + init_cache(options.mangle.properties.cache); + } + if (options.sourceMap) { + options.sourceMap = defaults(options.sourceMap, { + content: null, + filename: null, + includeSources: false, + root: null, + url: null, + }, true); + } + var warnings = []; + if (options.warnings) AST_Node.log_function(function(warning) { + warnings.push(warning); + }, options.warnings == "verbose"); + if (timings) timings.parse = Date.now(); + var source_maps, toplevel; + if (files instanceof AST_Toplevel) { + toplevel = files; + } else { + if (typeof files == "string") { + files = [ files ]; + } + options.parse = options.parse || {}; + options.parse.toplevel = null; + var source_map_content = options.sourceMap && options.sourceMap.content; + if (typeof source_map_content == "string" && source_map_content != "inline") { + source_map_content = parse_source_map(source_map_content); + } + source_maps = source_map_content && Object.create(null); + for (var name in files) if (HOP(files, name)) { + options.parse.filename = name; + options.parse.toplevel = toplevel = parse(files[name], options.parse); + if (source_maps) { + if (source_map_content == "inline") { + var inlined_content = read_source_map(name, toplevel); + if (inlined_content) { + source_maps[name] = parse_source_map(inlined_content); + } + } else { + source_maps[name] = source_map_content; + } + } + } + } + if (quoted_props) { + reserve_quoted_keys(toplevel, quoted_props); + } + [ "enclose", "wrap" ].forEach(function(action) { + var option = options[action]; + if (!option) return; + var orig = toplevel.print_to_string().slice(0, -1); + toplevel = toplevel[action](option); + files[toplevel.start.file] = toplevel.print_to_string().replace(orig, ""); + }); + if (timings) timings.rename = Date.now(); + if (options.rename) { + toplevel.figure_out_scope(options.mangle); + toplevel.expand_names(options.mangle); + } + if (timings) timings.compress = Date.now(); + if (options.compress) toplevel = new Compressor(options.compress).compress(toplevel); + if (timings) timings.scope = Date.now(); + if (options.mangle) toplevel.figure_out_scope(options.mangle); + if (timings) timings.mangle = Date.now(); + if (options.mangle) { + toplevel.compute_char_frequency(options.mangle); + toplevel.mangle_names(options.mangle); + } + if (timings) timings.properties = Date.now(); + if (options.mangle && options.mangle.properties) { + toplevel = mangle_properties(toplevel, options.mangle.properties); + } + if (timings) timings.output = Date.now(); + var result = {}; + if (options.output.ast) { + result.ast = toplevel; + } + if (!HOP(options.output, "code") || options.output.code) { + if (options.sourceMap) { + options.output.source_map = SourceMap({ + content: options.sourceMap.includeSources, + file: options.sourceMap.filename, + orig: source_maps, + root: options.sourceMap.root + }); + if (options.sourceMap.includeSources) { + if (files instanceof AST_Toplevel) { + throw new Error("original source content unavailable"); + } else for (var name in files) if (HOP(files, name)) { + options.output.source_map.setSourceContent(name, files[name]); + } + } + } + delete options.output.ast; + delete options.output.code; + var stream = OutputStream(options.output); + toplevel.print(stream); + result.code = stream.get(); + if (options.sourceMap) { + result.map = options.output.source_map.toString(); + var url = options.sourceMap.url; + if (url) { + result.code = result.code.replace(/\n\/\/# sourceMappingURL=\S+\s*$/, ""); + if (url == "inline") { + result.code += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + to_base64(result.map); + } else { + result.code += "\n//# sourceMappingURL=" + url; + } + } + } + } + if (options.nameCache && options.mangle) { + if (options.mangle.cache) options.nameCache.vars = to_json(options.mangle.cache); + if (options.mangle.properties && options.mangle.properties.cache) { + options.nameCache.props = to_json(options.mangle.properties.cache); + } + } + if (timings) { + timings.end = Date.now(); + result.timings = { + parse: 1e-3 * (timings.rename - timings.parse), + rename: 1e-3 * (timings.compress - timings.rename), + compress: 1e-3 * (timings.scope - timings.compress), + scope: 1e-3 * (timings.mangle - timings.scope), + mangle: 1e-3 * (timings.properties - timings.mangle), + properties: 1e-3 * (timings.output - timings.properties), + output: 1e-3 * (timings.end - timings.output), + total: 1e-3 * (timings.end - timings.start) + }; + } + if (warnings.length) { + result.warnings = warnings; + } + return result; + } catch (ex) { + return { error: ex }; + } +} |