英文:
Go: command line flags
问题
我知道你可以指定命令行标志并对你的二进制文件进行运行，就像这样：
./binary -output=html -type=doc
然而，我正在查看这个Go包的实现：https://github.com/jteeuwen/go-bindata
我想知道作者是如何使用户能够像这样运行命令
go-bindata /data
而不是
./go-bindata -target=/data
如果我漏掉了什么，请帮忙解答一下！
英文:
I know you can specify command line flags and run your binary file against them like this:
./binary -output=html -type=doc
However, I was looking at the implementation of this Go package: https://github.com/jteeuwen/go-bindata
I'm wondering how the author is able to enable the user to run the commands like this
go-bindata /data
instead of
./go-bindata -target=/data
Appreciate some help in case I missed out anything!
答案1
得分: 6
关键是使用flag.Args()，它是紧随标志后的非标志参数。你可以获取整个参数列表，或者使用flag.Arg(i)获取特定的参数。请参阅http://golang.org/pkg/flag/#Args
从你发布的程序源代码中可以看到：
// 创建输入配置。
c.Input = make([]bindata.InputConfig, flag.NArg())
for i := range c.Input {
c.Input[i] = parseInput(flag.Arg(i))
}
英文:
The trick is to use flag.Args() which is, simply, the non flag arguments following the flags. You can either fetch the entire list, or get a specific arg with flag.Arg(i). See http://golang.org/pkg/flag/#Args
And from the source of the program you posted:
// Create input configurations.
c.Input = make([]bindata.InputConfig, flag.NArg())
for i := range c.Input {
c.Input[i] = parseInput(flag.Arg(i))
}
答案2
得分: 1
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