<p>Hey guys, </p>
<p>looking for some patterns / examples of Go CLI tools.
what are the best ways to implement it </p>
<p>thanks!</p>
<hr/>**评论：**<br/><br/>lktslionel: <pre><p>Cobra (<a href="https://github.com/spf13/cobra">https://github.com/spf13/cobra</a>) is a great choice. Even big projects (kubernetes & more) use it. It propose a cli app generator built in that help you bootstrap a cli project in Go.</p></pre>etherealflaim: <pre><p>Just don't follow the examples that encourage the rampant use of globals...</p></pre>heartwilltell: <pre><p>I think that Cobra is great but it is a little bit complex for beginners. </p></pre>dan_82: <pre><p>Wow. cool.
I wonder if there is anything similar to Python Plumbum that allows to call commands and remote commands (and makes it easier to make wrappers).</p></pre>superchalupa: <pre><p>This link was posted a few weeks ago: <a href="https://blog.depado.eu/post/checklist-for-go-projects" rel="nofollow">https://blog.depado.eu/post/checklist-for-go-projects</a></p>
<p>It has concrete and simple examples for Viper and Cobra integration. I integrated these both with my project and am very happy with the results.</p></pre>darklumt: <pre><p>I have used <a href="https://github.com/urfave/cli">cli</a> with great success, its pretty simple to use and with great features.</p></pre>FatFingerHelperBot: <pre><p>It seems that your comment contains 1 or more links that are hard to tap for mobile users.
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<p>It's nice that it now supports a function that can return an error, although I do find wrapping the error in the cli.NewError a little annoying (understandable for having a return code, but I don't think the default behaviour worked for me).</p></pre>__crackers__: <pre><p><a href="https://github.com/alecthomas/kingpin">kingpin</a> is the most capable library, imo.</p>
<p>Cobra does weird stuff (e.g. camelCase flags like <code>--logFile</code> instead of <code>--log-file</code>). Theoretically, its integration with viper should be a killer feature, but that's been <a href="https://github.com/spf13/viper/issues/276">(somewhat) broken for 18 months</a>.</p>
<p><a href="https://github.com/docopt/docopt.go">docopt</a> is good for simpler programs.</p></pre>jh125486: <pre><p>I also like how easy it is to define command line arts that can also be ENV cars. That was weird to do in cobra/ufave. </p>
<p>Oh and Count of args... like with “-vvv” I can set the log level +3 times for super duper verbose, or just “-v” for regular verbose. </p></pre>kalekold: <pre><p>I've written a few and most times you don't need to use a framework.</p>
<p>Here's one I wrote a while back</p>
<p><a href="https://github.com/nomad-software/grope" rel="nofollow">https://github.com/nomad-software/grope</a></p></pre>saturn_vk: <pre><p>I simply user flagsets for the different subcommands. So far I haven't had a case that wasn't easily solvable</p></pre>daveddev: <pre><p>If you'd like to avoid third-party dependencies, this is a simple way to add subcommands (it looks more complicated than it is): <a href="https://play.golang.org/p/kcuxbVlBrd-" rel="nofollow">https://play.golang.org/p/kcuxbVlBrd-</a></p>
<p>And running a subcommand:
<a href="https://play.golang.org/p/BYrN5N9LSCt" rel="nofollow">https://play.golang.org/p/BYrN5N9LSCt</a></p>
<p>As with postponing/avoiding the use of http frameworks, new users would probably benefit from learning this approach before reaching for a cli framework.</p></pre>earthboundkid: <pre><p>I actually like the flag package (weird, I know). I usually try to write a very short main function that just calls something to turn flags into local variables, and then calls that thing and if it returns an error exits with a non-zero error code. </p>
<p>Here is a decent example: <a href="https://github.com/baltimore-sun-data/boreas/blob/master/main.go" rel="nofollow">https://github.com/baltimore-sun-data/boreas/blob/master/main.go</a></p></pre>blackflicker: <pre><p>If it's a simple CLI tool just use <code>os.Args</code> and raw-string literals, do not be fancy at the beginning. Don't even start with <a href="https://golang.org/pkg/flag/" rel="nofollow">flag package</a>. If it's more complex than try flag pkg first and check out <a href="https://github.com/avelino/awesome-go#command-line" rel="nofollow">here</a>.</p></pre>
