79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
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// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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class BaseArgumentsProcessor {
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constructor(args) {
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this.args_ = args;
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this.result_ = this.getDefaultResults();
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console.assert(this.result_ !== undefined)
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console.assert(this.result_.logFileName !== undefined);
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this.argsDispatch_ = this.getArgsDispatch();
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console.assert(this.argsDispatch_ !== undefined);
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}
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getDefaultResults() {
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throw "Implement in getDefaultResults in subclass";
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}
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getArgsDispatch() {
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throw "Implement getArgsDispatch in subclass";
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}
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result() { return this.result_ }
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printUsageAndExit() {
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print('Cmdline args: [options] [log-file-name]\n' +
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'Default log file name is "' +
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this.result_.logFileName + '".\n');
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print('Options:');
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for (var arg in this.argsDispatch_) {
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var synonyms = [arg];
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var dispatch = this.argsDispatch_[arg];
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for (var synArg in this.argsDispatch_) {
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if (arg !== synArg && dispatch === this.argsDispatch_[synArg]) {
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synonyms.push(synArg);
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delete this.argsDispatch_[synArg];
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}
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}
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print(' ' + synonyms.join(', ').padEnd(20) + " " + dispatch[2]);
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}
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quit(2);
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}
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parse() {
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while (this.args_.length) {
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var arg = this.args_.shift();
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if (arg.charAt(0) != '-') {
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this.result_.logFileName = arg;
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continue;
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}
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var userValue = null;
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var eqPos = arg.indexOf('=');
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if (eqPos != -1) {
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userValue = arg.substr(eqPos + 1);
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arg = arg.substr(0, eqPos);
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}
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if (arg in this.argsDispatch_) {
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var dispatch = this.argsDispatch_[arg];
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var property = dispatch[0];
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var defaultValue = dispatch[1];
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if (typeof defaultValue == "function") {
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userValue = defaultValue(userValue);
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} else if (userValue == null) {
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userValue = defaultValue;
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}
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this.result_[property] = userValue;
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} else {
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return false;
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}
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}
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return true;
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}
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}
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function parseBool(str) {
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if (str == "true" || str == "1") return true;
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return false;
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}
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