Class: Envo::CmdUnset

Inherits:
Object
  • Object
show all
Defined in:
lib/envo/cmd_unset.rb

Constant Summary collapse

Name = 
'unset'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(names) ⇒ CmdUnset

Returns a new instance of CmdUnset.



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# File 'lib/envo/cmd_unset.rb', line 25

def initialize(names)
  raise Envo::Error.new 'unset: no names provided' if names.empty?
  @names = names
end

Instance Attribute Details

#names ⇒ Object (readonly)

Returns the value of attribute names.



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# File 'lib/envo/cmd_unset.rb', line 30

def names
  @names
end

Class Method Details

.parse_cli(args) ⇒ Object 



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# File 'lib/envo/cmd_unset.rb', line 16

def self.parse_cli(args)
  opts = CliParser.filter_opts(args)
  ParsedCmd.new(CmdUnset.new(args), opts)
end

.parse_tokens(tokens, opts) ⇒ Object 



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# File 'lib/envo/cmd_unset.rb', line 21

def self.parse_tokens(tokens, opts)
  ParsedCmd.new(CmdUnset.new(tokens), opts)
end

.register_cli_parser(parser) ⇒ Object 



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# File 'lib/envo/cmd_unset.rb', line 8

def self.register_cli_parser(parser)
  parser.add_cmd(Name, ->(cmd, args) { parse_cli(args) })
end

.register_help(help) ⇒ Object 



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# File 'lib/envo/cmd_unset.rb', line 4

def self.register_help(help)
  help.add_cmd 'unset <name> ...', "unset values of one or more environment variables"
end

.register_script_parser(parser) ⇒ Object 



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# File 'lib/envo/cmd_unset.rb', line 12

def self.register_script_parser(parser)
  parser.add_cmd(Name, ->(cmd, tokens, opts) { parse_tokens(tokens, opts) })
end

Instance Method Details

#execute(ctx) ⇒ Object 



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# File 'lib/envo/cmd_unset.rb', line 32

def execute(ctx)
  @names.each do |name|
    ename = ctx.expand_name(name)
    raw_old_val = ctx.raw_get(ename)

    if raw_old_val
      ctx.unset(ename)
    else
      raise Envo::Error.new "unset: no such var '#{ename}'" if !ctx.force?
    end
  end
end