121 lines
2.5 KiB
Ruby
Executable file
121 lines
2.5 KiB
Ruby
Executable file
require 'optparse'
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class DenCli
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def self.assert_type klass, method, argument_name, object, *types
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unless types.any? {|type| object.is_a? type }
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raise ArgumentError, "#{klass.name}.#{method} expects #{types.map( &:to_s).join '|' } for #{argument_name}, not: #{object.inspect}"
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end
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end
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class UsageError < ::RuntimeError
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end
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class UnknownCommand < UsageError
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end
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require_relative 'dencli/cmd'
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require_relative 'dencli/sub'
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require_relative 'dencli/interactive'
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require_relative 'dencli/version'
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class <<self
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# Helper Function for generate Regular Expressions of string,
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# which matches all strings which has parts fron beginning of the given string.
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# `n("abc")` would produce: `/(?:a|ab|abc)/`
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# You can define a minimum length to match:
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# `n("abcdef",4)` => `/abcd(?:|e|ef)/`
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def n s, min = nil
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min ||= 1
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/#{s.length <= min ?
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Regexp.quote(s) :
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"#{Regexp.quote s[0...min]}#{
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s[min...-1].
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reverse.
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each_char.
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reduce( "#{Regexp.quote s[-1]}?") {|f,n|
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"(?:#{Regexp.quote n}#{f})?"
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}
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}"
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}/
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end
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# Wraps `n(s,min=)` in a full matching RegExp with ending `\0`:
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# `r("abc")` would produce: `/\A(?:a|ab|abc)\0\z/`
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# You can define a minimum length to match:
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# `r("abcdef",4)` => `/\aabcd(?:|e|ef)\0\z/`
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def r s, min = nil
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/\A#{n s, min}\0\z/
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end
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# Generates a list of aliases for given `cmd`:
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# `g(:abc)` => `["a", "ab", "abc"]`
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# `g(:abcdef, 4)` => `["abcd", "abcde", "abcdef"]`
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def gen_aliases cmd, min = nil
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case min
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when false then min = cmd.length
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when nil then min = 1
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end
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r = ([min, 1].max - 1).upto cmd.length-2
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if block_given?
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r.each {|i| yield cmd[0..i] }
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yield cmd
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else
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r.map {|i| cmd[0..i] } + [cmd]
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end
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end
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alias g gen_aliases
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end
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attr_reader :subs
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def initialize progname, description
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@subs = Sub.new self, progname, description
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end
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def full_cmd
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[]
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end
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def _full_cmd post
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post
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end
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def sub *a, **o, &exe
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@subs.sub *a, **o, &exe
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end
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def cmd *a, **o, &exe
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@subs.cmd *a, **o, &exe
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end
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def call *a
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@subs.call *a
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end
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def usage *args, **opts
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@subs.usage *args, **opts
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end
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def help *args, **opts
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@subs.help *args, **opts
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end
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def help_full *args, output: nil
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output ||= $stdout
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x = @subs.goto *args
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_help_full output, x
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end
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def _help_full output, subs
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Sub._help_commands output, subs.to_enum( :commands)
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end
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def [] k
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@subs[k]
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end
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def interactive *args, **opts
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Interactive.new self, *args, **opts
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end
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end
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