module Bundler::FriendlyErrors

def disable!
  @disabled = true
end

def disabled?
  @disabled
end

def enable!
  @disabled = false
end

def exception_message(error)
  message = serialized_exception_for(error)
  cause = error.cause
  return message unless cause
  message + serialized_exception_for(cause)
end

def exit_status(error)
  case error
  when BundlerError then error.status_code
  when Thor::Error then 15
  when SystemExit then error.status
  else 1
  end
end

def issues_url(exception)
  message = exception.message.lines.first.tr(":", " ").chomp
  message = message.split("-").first if exception.is_a?(Errno)
  require "cgi"
  "https://github.com/rubygems/rubygems/search?q=" \
    "#{CGI.escape(message)}&type=Issues"
end

def log_error(error)
  case error
  when YamlSyntaxError
    Bundler.ui.error error.message
    Bundler.ui.trace error.orig_exception
  when Dsl::DSLError, GemspecError
    Bundler.ui.error error.message
  when GemRequireError
    Bundler.ui.error error.message
    Bundler.ui.trace error.orig_exception
  when BundlerError
    if Bundler.ui.debug?
      Bundler.ui.trace error
    else
      Bundler.ui.error error.message, :wrap => true
    end
  when Thor::Error
    Bundler.ui.error error.message
  when Interrupt
    Bundler.ui.error "\nQuitting..."
    Bundler.ui.trace error
  when Gem::InvalidSpecificationException
    Bundler.ui.error error.message, :wrap => true
  when SystemExit
  when *[defined?(Java::JavaLang::OutOfMemoryError) && Java::JavaLang::OutOfMemoryError].compact
    Bundler.ui.error "\nYour JVM has run out of memory, and Bundler cannot continue. " \
      "You can decrease the amount of memory Bundler needs by removing gems from your Gemfile, " \
      "especially large gems. (Gems can be as large as hundreds of megabytes, and Bundler has to read those files!). " \
      "Alternatively, you can increase the amount of memory the JVM is able to use by running Bundler with jruby -J-Xmx1024m -S bundle (JRuby defaults to 500MB)."
  else request_issue_report_for(error)
  end
end

def new_issue_url
  "https://github.com/rubygems/rubygems/issues/new?labels=Bundler&template=bundler-related-issue.md"
end

def request_issue_report_for(e)
  Bundler.ui.error <<-EOS.gsub(/^ {8}/, ""), nil, nil
    --- ERROR REPORT TEMPLATE -------------------------------------------------------
    ```
    #{exception_message(e)}
    ```
    #{Bundler::Env.report}
    --- TEMPLATE END ----------------------------------------------------------------
  EOS
  Bundler.ui.error "Unfortunately, an unexpected error occurred, and Bundler cannot continue."
  Bundler.ui.error <<-EOS.gsub(/^ {8}/, ""), nil, :yellow
    First, try this link to see if there are any existing issue reports for this error:
    #{issues_url(e)}
    If there aren't any reports for this error yet, please fill in the new issue form located at #{new_issue_url}, and copy and paste the report template above in there.
  EOS
end

def serialized_exception_for(e)
  <<-EOS.gsub(/^ {8}/, "")
    #{e.class}: #{e.message}
      #{e.backtrace && e.backtrace.join("\n          ").chomp}
  EOS
end