gemini-configparser

Parser for gemini configuration files. Config is described with a combination of a functions: ```js var parser = root(section({

system: section({

parallelLimit: option({

parseEnv: Number,

parseCli: Number,

validate: function() {...}

})

}),

browsers: map(

section({

calibrate: option(...),

windowSize: option(...)

})

)

}) ``` There are 4 types of values:

• option({defaultValue, parseCli, parseEnv, validate, map}) - a single scalar option.

- `defaultValue` - a default value to use if option is not provided

- `defaultValue(config, currentNode)` - a function to compute default value

- `parseCli(value)` - a function used to parse command-line arguments

- `parseEnv(value)` - a function used to parse environment variable

- `validate(value, config, currentNode, meta)` - a function used to validate the option value

- `map(value, config, currentNode, meta)` - a function used to transform the option value

• section({sectionName1: valueParser1, sectionName2: valueParser2, ...}) - a section of a

values with specified key names. Each option will parsed with appropriate parser function. Any unknown value passed by user will be treated as an error.

• map(valueParser, defaultValue) - a map with any number of user-specified keys. Each value is parsed by

valueParser. If set, defaultValue will be used in case of no user-specified data provided.

• root(parser, {envPrefix, cliPrefix}) - creates a root config parsers from specifed parser function. Returns function with signature f({options, env, argv}).