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require_relative "../output" |
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require_relative "exceptions" |
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require_relative "exception_suppressor" |
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module Resume |
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module CLI |
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# Module concerned with the installation and dependency checking |
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# of Ruby gems on to the system in order to generate the resume. |
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# |
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# @author Paul Fioravanti |
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class GemInstaller |
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extend Forwardable |
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# @!attribute gems [r] |
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# @return [Hash] The hash of gems to install. |
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1 |
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attr_reader :gems |
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def self.gem_already_installed?(name, version) |
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Gem::Specification.find_by_name(name).version == |
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Gem::Version.new(version) |
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end |
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private_class_method :gem_already_installed? |
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# Initialises a new instance of a Gem Installer. |
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# |
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# @param gems [Hash] |
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# A hash containing the gem dependencies for the resume. |
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# @return [GemInstaller] |
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# The gem installer object. |
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def initialize(gems) |
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@gems = gems |
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end |
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# Audits the local system to see if the necessary gems are installed. |
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# |
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# @return [Hash] The list of remaining gem dependencies to install. |
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def audit_gem_dependencies |
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gems.each do |name, version| |
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# if gem not installed: leave in the gems list |
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ExceptionSuppressor.suppress(Gem::LoadError, -> { next }) do |
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if self.class.__send__(:gem_already_installed?, name, version) |
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# remove dependency to install |
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self.gems -= [[name, version]] |
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end |
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end |
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end |
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end |
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# Outputs the name and version of the gems that must be installed |
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# in order to generate the resume. |
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# |
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# @return [Hash] The list of dependencies to install. |
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def output_gem_dependencies |
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return if gems.none? |
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Output.warning(:ruby_gems) |
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gems.each do |name, version| |
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Output.plain(:gem_name_and_version, name: name, version: version) |
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end |
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end |
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# Attempts to install gem dependencies and reports back on |
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# whether it was successful. |
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# |
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# @raise [NetworkConnectionError] |
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# if an internet connection is unavailable to download gems. |
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# @return [true] |
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# if gem dependencies were successfully installed. |
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# @return [false] |
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# if gem dependencies were not successfully installed. |
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def gems_successfully_installed? |
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return true if gems.none? |
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74
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Output.plain(:installing_ruby_gems) |
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gems.all? do |gem_name, version| |
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Kernel.system("gem", "install", gem_name, "-v", version) |
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end |
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rescue SocketError, Errno::ECONNREFUSED |
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raise NetworkConnectionError |
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ensure |
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# Reset dir and path values so just-installed gems can |
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# be required, but also have this here so that the |
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# return value for this method is a boolean |
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84
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5 |
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Gem.clear_paths |
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end |
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87
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1 |
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private |
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88
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89
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1 |
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attr_writer :gems |
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90
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end |
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end |
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end |
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paulfioravanti /
resume
