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  1. 6
      Gemfile
  2. 34
      Gemfile.lock
  3. 165
      LICENSE.txt
  4. 63
      README.adoc
  5. 2
      Rakefile
  6. 31
      dencli.gemspec
  7. 183
      lib/dencli.rb
  8. 3
      lib/dencli/version.rb

6
Gemfile
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source "https://rubygems.org"
# Specify your gem's dependencies in dencli.gemspec
gemspec
gem "rake", "~> 12.0"

34
Gemfile.lock
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PATH
remote: .
specs:
dencli (0.1.0)
GEM
remote: https://rubygems.org/
specs:
diff-lcs (1.4.4)
rake (12.3.3)
rspec (3.10.0)
rspec-core (~> 3.10.0)
rspec-expectations (~> 3.10.0)
rspec-mocks (~> 3.10.0)
rspec-core (3.10.0)
rspec-support (~> 3.10.0)
rspec-expectations (3.10.0)
diff-lcs (>= 1.2.0, < 2.0)
rspec-support (~> 3.10.0)
rspec-mocks (3.10.0)
diff-lcs (>= 1.2.0, < 2.0)
rspec-support (~> 3.10.0)
rspec-support (3.10.0)
PLATFORMS
ruby
DEPENDENCIES
dencli!
rake (~> 12.0)
rspec (~> 3.2)
BUNDLED WITH
2.1.4

165
LICENSE.txt
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GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.
0. Additional Definitions.
As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.
"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.
An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.
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Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".
The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.
The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.
1. Exception to Section 3 of the GNU GPL.
You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.
2. Conveying Modified Versions.
If you modify a copy of the Library, and, in your modifications, a
facility refers to a function or data to be supplied by an Application
that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
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whatever part of its purpose remains meaningful, or
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The object code form of an Application may incorporate material from
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63
README.adoc
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# DenCli
Provides a Command-Line-Interface-API for providing commands.
## Installation
Add this line to your application's Gemfile:
[source,ruby]
----
gem 'dencli'
----
And then execute:
[source,sh]
----
$ bundle install
----
Or install it yourself as:
[source,sh]
----
$ gem install dencli
----
## Usage
[source,ruby]
----
#!/usr/bin/env ruby
require 'dencli'
cli = CLI.new "This is an example for generate a CLI-API"
cli.cmd( :example, "I have an example command") { STDERR.puts "This is an example" }
cli.cmd( :help) {|*args| STDERR.puts cli.help(*args) }
cli.sub( :more, "Sub-Commands are also possible with a new cli") do |sub|
sub.cmd( :help) {|*args| STDERR.puts cli.help( 'more', *args) }
sub.cmd( :example, "Here is an example, too") { STDERR.puts "This is an other example" }
sub.cmd( :foo, "BAR") { STDERR.puts "FOO bar"}
sub.sub( :deeper, "You want to have Sub-Sub-Commands?") do |sub2|
sub2.cmd( :help) {|*args| STDERR.puts cli.help( 'more', 'deeper', *args) }
sub2.cmd( :last, "The last example") { STDERR.puts "The last example" }
sub2.sub( :'sub-commands', "Endless Sub-Sub- ...") do |sub3|
sub2.cmd( :help) {|*args| STDERR.puts cli.help( 'more', 'deeper', 'sub-commands', *args) }
sub3.cmd( :hehe, "The real last example", min: 2) { STDERR.puts "Trust me!" }
end
end
end
cli.call *ARGV
----
## Development
## Contributing
Bug reports and pull requests are welcome on git at https://git.denkn.at/deac/dencli.

2
Rakefile
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require "bundler/gem_tasks"
task :default => :spec

31
dencli.gemspec
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require_relative 'lib/dencli/version'
Gem::Specification.new do |spec|
spec.name = "dencli"
spec.version = DenCli::VERSION
spec.authors = ["Denis Knauf"]
spec.email = ["git+dencli@denkn.at"]
spec.licenses = ["LGPL-3.0"]
spec.summary = %q{Commands and Subcommands}
spec.description = %q{Embedded commands for Command-Line-Interfaces}
spec.homepage = "https://git.denkn.at/deac/dencli"
spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
#spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"
spec.metadata["homepage_uri"] = spec.homepage
spec.metadata["source_code_uri"] = spec.homepage
spec.metadata["changelog_uri"] = spec.homepage
spec.add_development_dependency "rspec", "~> 3.2"
# Specify which files should be added to the gem when it is released.
# The `git ls-files -z` loads the files in the RubyGem that have been added into git.
spec.files = Dir.chdir(File.expand_path('..', __FILE__)) do
`git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
end
spec.bindir = "bin"
spec.executables = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
spec.require_paths = ["lib"]
end

183
lib/dencli.rb
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class DenCli
class UsageError < ::RuntimeError
end
class UnknownCommand < UsageError
end
class <<self
# Helper Function for generate Regular Expressions of string,
# which matches all strings which has parts fron beginning of the given string.
# `n("abc")` would produce: `/(?:a|ab|abc)/`
# You can define a minimum length to match:
# `n("abcdef",4)` => `/abcd(?:|e|ef)/`
def n s, min = nil
min ||= 1
/#{s.length <= min ?
Regexp.quote(s) :
"#{Regexp.quote s[0...min]}#{
s[min...-1].
reverse.
each_char.
reduce( "#{Regexp.quote s[-1]}?") {|f,n|
"(?:#{Regexp.quote n}#{f})?"
}
}"
}/
end
# Wraps `n(s,min=)` in a full matching RegExp with ending `\0`:
# `r("abc")` would produce: `/\A(?:a|ab|abc)\0\z/`
# You can define a minimum length to match:
# `r("abcdef",4)` => `/\aabcd(?:|e|ef)\0\z/`
def r s, min = nil
/\A#{n s, min}\0\z/
end
# Generates a list of aliases for given `cmd`:
# `g(:abc)` => `["a", "ab", "abc"]`
# `g(:abcdef, 4)` => `["abcd", "abcde", "abcdef"]`
def gen_aliases cmd, min = nil
r = ((min||1)-1).upto cmd.length-1
if block_given?
r.each {|i| yield cmd[0..i] }
else
r.map {|i| cmd[0..i] }
end
end
alias g gen_aliases
end
class CMD
attr_reader :parent, :name, :desc, :exe
def initialize parent, name, desc, exe
raise "Proc expected, instead of: #{exe.inspect}" unless Proc === exe
@parent, @name, @desc, @exe = parent, name, desc, exe
end
def _full_cmd post
parent._full_cmd [@name]+post
end
def full_cmd
_full_cmd []
end
def call *a
@exe.call *a
end
def help
"#{parent.full_cmd.join ' '} #{name}\n#{ desc}"
end
def inspect
"#<%s:0x%x %s @name=%p @desc=%p @parent=<%s:0x%x %s> @exe=<arity=%d>>" % [
self.class.name, self.object_id, self.full_cmd,
@name, @desc, @parent.class.name, @parent.class.object_id, @parent.full_cmd,
@exe.arity
]
end
end
class Sub
attr_reader :parent, :name, :desc, :subs
def initialize parent, name, desc
@parent, @name, @desc, @subs, @aliases = parent, name, desc, {}, {}
end
def _full_cmd post
parent._full_cmd [@name]+post
end
def full_cmd
_full_cmd []
end
def [] k
@aliases[k]
end
def help n = nil, *a
if n.nil?
r = "#{full_cmd.join ' '}: #{desc}\n\n"
m = @subs.map {|k,_| k.length }.max
@subs.each do |k, c|
r += " % -#{m}s %s\n" % [k, c.desc] unless k.nil?
end
r
elsif @aliases.has_key? n
@aliases[n].help *a
else
raise UnknownCommand, "unknown command: #{_full_cmd( [n])[1..-1].join ' '}, available for #{full_cmd[1..-1].join' '}: #{@subs.keys.inspect}"
end
end
def call *a
n, *a = *a
if @aliases.has_key? n
@aliases[n].call *a
else
raise UnknownCommand, "unknown command: #{_full_cmd( [n])[1..-1].join ' '}, available for #{full_cmd[1..-1].join' '}: #{@subs.keys.inspect}"
end
end
def _add name, min, obj, aliases
name = name.to_s unless name.nil?
@subs[name] = obj
CL.gen_aliases( name, min) {|a| @aliases[a] = obj }
if aliases
[*aliases].each {|a| @aliases[a] = obj }
end
obj
end
private :_add
def sub name, desc, min: nil, aliases: nil, &exe
r = _add name, min, Sub.new( self, name, desc), aliases
block_given? ? yield( r) : r
end
def cmd name, desc, min: nil, aliases: nil, &exe
_add name, min, CMD.new( self, name, desc, exe), aliases
end
def inspect
"#<%s:0x%x %s @name=%p @desc=%p @subs={%s} @aliases={%s} @parent=<%s:0x%x %s>>" % [
self.class.name, self.object_id, self.full_cmd,
@name, @desc, @subs.keys.join(', '), @aliases.keys.join(', '), @parent.class.name, @parent.class.object_id, @parent.full_cmd
]
end
end
def initialize progname, desc
@subs = Sub.new self, progname, desc
end
def full_cmd
[]
end
def _full_cmd post
post
end
def sub *a, &exe
@subs.sub *a, &exe
end
def cmd *a, &exe
@subs.cmd *a, &exe
end
def call *a
@subs.call *a
end
def help *args
@subs.help *args
end
def [] k
@subs[k]
end
end

3
lib/dencli/version.rb
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class DenCli
VERSION = '0.1.0'
end
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