15

In a Raku distribution how do I depend on either Foo::Bar or Foo::Baz without requiring both?

raiph
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ugexe
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  • The tags I added do not serve the usual primary purpose of tags (to bring a question to attention of those who contribute to answering). I thought they might help bring your Q to the attention of those searching for answers, which I presume is a leading reason you write your Q+As, but would appreciate reading your reaction. For one thing, is [package] inappropriate? Either of the other two? If you would prefer I generally leave your questions unedited, including tags, I'd be fine with that too; please just let me know. TIA for any reply. And of course for zef, and your excellent Q+As. – raiph Dec 04 '20 at 13:23
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    I'm using package as a generic, language agnostic term for what a distribution otherwise represents in raku. Theoretically `Foo:from`, `Foo:from` are valid dependencies (or even direct installation identities), and in that context 'package' feels like a more accurate description than 'distribution' or 'module'. Regardless; I don't spend much time thinking about my own tags lest I get stuck over analyzing minor details before my inspiration to answer is expired, and have no issues with anyone adding tags they think are appropriate. – ugexe Dec 04 '20 at 15:01

1 Answers1

16

You can use "any": [$dependency-spec1, $dependency-spec2]. This could look like one of the following (depending on if you use a plain string dependency or a hash):

"depends" : {
    "runtime" : {
        "any" : [
            "Foo::Bar",
            "Foo::Baz"
        ]
    }
}

"depends" : {
    "runtime" : {
        "any" : [
            {
                "name" : "Foo::Bar"
            },
            {
                "name" : "Foo::Baz"
            }
        ]
    }
}

This isn't constrained to raku dependencies either. For instance to declare a dependency on either curl or wget one can do:

"depends" : {
    "runtime" : {
        "any" : [
            "curl:from<bin>",
            "wget:from<bin>"
        ]
    }
}

which would cause zef install $whatever to inform the user of the missing programs if none are found.

ugexe
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