Background

I am designing a CLI for a container build tool I am making. It uses Gentoo’s Portage behind the scenes

Question

I want to give the user the ability to specify a custom package repository. The repository must have a name, URI and sync type.

custom_repo: {
    uri: 'https://...',
    name: 'custom',
    sync_type: 'git',
}

How do I have the user represent this in the CLI? keep in mind, this is not the main input and is optional.

One way is to make this only provide-able via a config file using JSON or another structured data representation. But I want to see if theres a good way to do it in the CLI

What I am thinking of: command --custom-repo uri='https://...',name=custom,sync_type=git --custom-repo ... [main input]

Is this the best way of doing this?

For something like that i’d take a parameter like this (repeated as necessary):

--custom-repo=<name>=<synctype>+<url>

for example:

--custom-repo=custom=git+https://github.com/matcha/custom

What language? This would be simple with Python’s argparse or Go’s pflag.

Can’t this all be deduced from the URI?

https://github.com/org/project.git

The .git suffix indicates git, the project name is the stem (project).

Oscar
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08M

That is assuming it’s hosted on github.

That is an example URI.

Oscar
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Ok, then I don’t understand at all. What happens if I host my git project on https://myawesomeproject.dev/? How can the application infer anything by this URL?

Then replace “github.com” with “myawesomeproject.dev”. There’s more to the URI than just the hostname.

Oscar
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But you can’t assume that it follows the github format of https://<domain>/<user>/<project>.git. In my example, I meant that you would just use that url to clone it:

git clone https://myawesomeproject.dev

One real-world example of this is ziglings.org (though it’s technically just a redirect).

That’s not a GitHub format; it’s a git format.

Oscar
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No, it isn’t. Git doesn’t care what the url is, as long as it uses a supported transport protocol.

@Corngood@lemmy.ml
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Nix does something like this with the protocol specifier: e.g. git+https://...

I’m not sure what name means here exactly, but it might make sense to treat that separately, like git remotes:

tool add [name] git+https://foo

You could read json from standard input. Ex:

echo &lt;&lt; EOF | command --read-stdin
    Some JSON
EOF
Chris
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Just pass in the name of a json file as a CLI input (or default the name and act on it if present or use it if indicated [e.g. /U == use json.config]).

@matcha_addict@lemy.lol
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I will definitely make that an option, but I would still want it to be invokable via CLI only if the user chooses. It makes scripting easier sometimes.

How about a command-line flag to name an input file, but also process input as JSON, so someone can pipe it to your command or hand-write it if they’re crazy?

key
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If the json payload is small with finite keys you can support separate args for those keys. If you really need arbitrary json what you have described is fairly reasonable as a shorthand, similar to AWS CLI shorthand.

Honestly passing optional/advanced args as json via CLI isn’t usually too bad since you can quote it with single quotes.

command --git-url https://... --alias myalias --svn-url http://... --alias mysvnalias

You may process it as a stack.

When reading within the program from stdin I recommend a state machine.

falsem
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command --custom-repo-uri https://foo.com --custom-repo-name repo_name --custom-repo-sync-type git

@matcha_addict@lemy.lol
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There could be multiple custom repos, so it would be difficult to know which uri goes with which repo name, and so on.

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