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# frozen_string_literal: true
require_relative '../command'
require_relative '../package'
require_relative '../version_option'
class Gem::Commands::BuildCommand < Gem::Command
include Gem::VersionOption
def initialize
super 'build', 'Build a gem from a gemspec'
add_platform_option
add_option '--force', 'skip validation of the spec' do |value, options|
options[:force] = true
end
add_option '--strict', 'consider warnings as errors when validating the spec' do |value, options|
options[:strict] = true
end
add_option '-o', '--output FILE', 'output gem with the given filename' do |value, options|
options[:output] = value
end
add_option '-C PATH', 'Run as if gem build was started in <PATH> instead of the current working directory.' do |value, options|
options[:build_path] = value
end
end
def arguments # :nodoc:
"GEMSPEC_FILE gemspec file name to build a gem for"
end
def description # :nodoc:
<<-EOF
The build command allows you to create a gem from a ruby gemspec.
The best way to build a gem is to use a Rakefile and the Gem::PackageTask
which ships with RubyGems.
The gemspec can either be created by hand or extracted from an existing gem
with gem spec:
$ gem unpack my_gem-1.0.gem
Unpacked gem: '.../my_gem-1.0'
$ gem spec my_gem-1.0.gem --ruby > my_gem-1.0/my_gem-1.0.gemspec
$ cd my_gem-1.0
[edit gem contents]
$ gem build my_gem-1.0.gemspec
Gems can be saved to a specified filename with the output option:
$ gem build my_gem-1.0.gemspec --output=release.gem
EOF
end
def usage # :nodoc:
"#{program_name} GEMSPEC_FILE"
end
def execute
if build_path = options[:build_path]
Dir.chdir(build_path) { build_gem }
return
end
build_gem
end
private
def find_gemspec(glob = "*.gemspec")
gemspecs = Dir.glob(glob).sort
if gemspecs.size > 1
alert_error "Multiple gemspecs found: #{gemspecs}, please specify one"
terminate_interaction(1)
end
gemspecs.first
end
def build_gem
gemspec = resolve_gem_name
if gemspec
build_package(gemspec)
else
alert_error error_message
terminate_interaction(1)
end
end
def build_package(gemspec)
spec = Gem::Specification.load(gemspec)
if spec
Gem::Package.build(
spec,
options[:force],
options[:strict],
options[:output]
)
else
alert_error "Error loading gemspec. Aborting."
terminate_interaction 1
end
end
def resolve_gem_name
return find_gemspec unless gem_name
if File.exist?(gem_name)
gem_name
else
find_gemspec("#{gem_name}.gemspec") || find_gemspec(gem_name)
end
end
def error_message
if gem_name
"Couldn't find a gemspec file matching '#{gem_name}' in #{Dir.pwd}"
else
"Couldn't find a gemspec file in #{Dir.pwd}"
end
end
def gem_name
get_one_optional_argument
end
end
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