# frozen_string_literal: true

require "formula"
require "cli/parser"

module Homebrew
  module_function

  def bump_revision_args
    Homebrew::CLI::Parser.new do
      usage_banner <<~EOS
        `bump-revision` [<options>] <formula>

        Create a commit to increment the revision of <formula>. If no revision is
        present, "revision 1" will be added.
      EOS
      switch "-n", "--dry-run",
             description: "Print what would be done rather than doing it."
      flag   "--message=",
             description: "Append <message> to the default commit message."

      named :formula
    end
  end

  def bump_revision
    args = bump_revision_args.parse

    # As this command is simplifying user-run commands then let's just use a
    # user path, too.
    ENV["PATH"] = ENV["HOMEBREW_PATH"]

    formula = args.formulae.first
    current_revision = formula.revision

    if current_revision.zero?
      formula_spec = formula.stable
      hash_type, old_hash = if (checksum = formula_spec.checksum)
        [checksum.hash_type, checksum.hexdigest]
      end

      old = if formula.license
        license_string = if formula.license.length > 1
          formula.license
        else
          "\"#{formula.license.first}\""
        end
        # insert replacement revision after license
        <<~EOS
          license #{license_string}
        EOS
      elsif formula.path.read.include?("stable do\n")
        # insert replacement revision after homepage
        <<~EOS
          homepage "#{formula.homepage}"
        EOS
      elsif hash_type
        # insert replacement revision after hash
        <<~EOS
          #{hash_type} "#{old_hash}"
        EOS
      else
        # insert replacement revision after :revision
        <<~EOS
          revision: "#{formula_spec.specs[:revision]}"
        EOS
      end
      replacement = old + "  revision 1\n"

    else
      old = "revision #{current_revision}"
      replacement = "revision #{current_revision+1}"
    end

    if args.dry_run?
      ohai "replace #{old.inspect} with #{replacement.inspect}" unless args.quiet?
    else
      Utils::Inreplace.inreplace(formula.path) do |s|
        s.gsub!(old, replacement)
      end
    end

    message = "#{formula.name}: revision bump #{args.message}"
    if args.dry_run?
      ohai "git commit --no-edit --verbose --message=#{message} -- #{formula.path}"
    else
      formula.path.parent.cd do
        safe_system "git", "commit", "--no-edit", "--verbose",
                    "--message=#{message}", "--", formula.path
      end
    end
  end
end