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67 lines
2.1 KiB
Markdown
67 lines
2.1 KiB
Markdown
# flags
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Command line arguments parser for Deno based on minimist
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# Example
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```ts
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import { parse } from "https://deno.land/std/flags/mod.ts";
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console.dir(parse(Deno.args));
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```
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```
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$ deno run https://deno.land/std/examples/flags.ts -a beep -b boop
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{ _: [], a: 'beep', b: 'boop' }
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```
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```
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$ deno run https://deno.land/std/examples/flags.ts -x 3 -y 4 -n5 -abc --beep=boop foo bar baz
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{ _: [ 'foo', 'bar', 'baz' ],
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x: 3,
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y: 4,
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n: 5,
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a: true,
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b: true,
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c: true,
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beep: 'boop' }
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```
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# API
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## const parsedArgs = parse(args, options = {});
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`parsedArgs._` contains all the arguments that didn't have an option associated
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with them.
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Numeric-looking arguments will be returned as numbers unless `options.string` or
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`options.boolean` is set for that argument name.
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Any arguments after `'--'` will not be parsed and will end up in `parsedArgs._`.
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options can be:
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- `options.string` - a string or array of strings argument names to always treat
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as strings
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- `options.boolean` - a boolean, string or array of strings to always treat as
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booleans. if `true` will treat all double hyphenated arguments without equal
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signs as boolean (e.g. affects `--foo`, not `-f` or `--foo=bar`)
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- `options.alias` - an object mapping string names to strings or arrays of
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string argument names to use as aliases
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- `options.default` - an object mapping string argument names to default values
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- `options.stopEarly` - when true, populate `parsedArgs._` with everything after
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the first non-option
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- `options['--']` - when true, populate `parsedArgs._` with everything before
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the `--` and `parsedArgs['--']` with everything after the `--`. Here's an
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example:
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```ts
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// $ deno run example.ts -- a arg1
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import { parse } from "https://deno.land/std/flags/mod.ts";
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console.dir(parse(Deno.args, { "--": false }));
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// output: { _: [ "a", "arg1" ] }
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console.dir(parse(Deno.args, { "--": true }));
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// output: { _: [], --: [ "a", "arg1" ] }
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```
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- `options.unknown` - a function which is invoked with a command line parameter
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not defined in the `options` configuration object. If the function returns
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`false`, the unknown option is not added to `parsedArgs`.
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