.option(‘-B, –baz’, ‘enable some baz’);
// must be before .parse() since
// node’s emit() is immediate
program.on(‘–help’, function(){
console.log(‘ Examples:’);
console.log(”);
console.log(‘ $ custom-help –help’);
console.log(‘ $ custom-help -h’);
console.log(”);
});
program.parse(process.argv);
console.log(‘stuff’);
4、举个完整的例子
function range(val) {
return val.split(‘..’).map(Number);
}
function list(val) {
return val.split(‘,’);
}
function collect(val, memo) {
memo.push(val);
return memo;
}
function increaseVerbosity(v, total) {
return total + 1;
}
program
.version(‘0.0.1’)
.usage(‘[options] <file …>’)
.option(‘-i, –integer <n>’, ‘An integer argument’, parseInt)
.option(‘-f, –float <n>’, ‘A float argument’, parseFloat)
.option(‘-r, –range <a>..<b>’, ‘A range’, range)
.option(‘-l, –list <items>’, ‘A list’, list)
.option(‘-o, –optional [value]’, ‘An optional value’)
.option(‘-c, –collect [value]’, ‘A repeatable value’, collect, [])
.option(‘-v, –verbose’, ‘A value that can be increased’, increaseVerbosity, 0)
.parse(process.argv);
console.log(‘ int: %j’, program.integer);
console.log(‘ float: %j’, program.float);
console.log(‘ optional: %j’, program.optional);
program.range = program.range || [];
console.log(‘ range: %j..%j’, program.range[0], program.range[1]);
console.log(‘ list: %j’, program.list);
console.log(‘ collect: %j’, program.collect);
console.log(‘ verbosity: %j’, program.verbose);
console.log(‘ args: %j’, program.args);
