107 lines
3.3 KiB
Ruby
107 lines
3.3 KiB
Ruby
# typed: true
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# frozen_string_literal: true
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require "utils/user"
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require "open3"
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BUG_REPORTS_URL = "https://github.com/Homebrew/homebrew-cask#reporting-bugs"
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module Cask
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# Helper functions for various cask operations.
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#
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# @api private
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module Utils
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def self.gain_permissions_remove(path, command: SystemCommand)
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if path.respond_to?(:rmtree) && path.exist?
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gain_permissions(path, ["-R"], command) do |p|
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if p.parent.writable?
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p.rmtree
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else
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command.run("/bin/rm",
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args: ["-r", "-f", "--", p],
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sudo: true)
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end
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end
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elsif File.symlink?(path)
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gain_permissions(path, ["-h"], command, &FileUtils.method(:rm_f))
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end
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end
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def self.gain_permissions(path, command_args, command)
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tried_permissions = false
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tried_ownership = false
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begin
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yield path
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rescue
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# in case of permissions problems
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unless tried_permissions
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# TODO: Better handling for the case where path is a symlink.
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# The -h and -R flags cannot be combined, and behavior is
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# dependent on whether the file argument has a trailing
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# slash. This should do the right thing, but is fragile.
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command.run("/usr/bin/chflags",
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must_succeed: false,
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args: command_args + ["--", "000", path])
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command.run("/bin/chmod",
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must_succeed: false,
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args: command_args + ["--", "u+rwx", path])
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command.run("/bin/chmod",
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must_succeed: false,
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args: command_args + ["-N", path])
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tried_permissions = true
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retry # rmtree
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end
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unless tried_ownership
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# in case of ownership problems
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# TODO: Further examine files to see if ownership is the problem
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# before using sudo+chown
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ohai "Using sudo to gain ownership of path '#{path}'"
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command.run("/usr/sbin/chown",
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args: command_args + ["--", User.current, path],
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sudo: true)
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tried_ownership = true
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# retry chflags/chmod after chown
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tried_permissions = false
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retry # rmtree
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end
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raise
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end
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end
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sig { params(path: Pathname).returns(T::Boolean) }
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def self.path_occupied?(path)
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path.exist? || path.symlink?
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end
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sig { params(name: String).returns(String) }
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def self.token_from(name)
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name.downcase
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.gsub("+", "-plus-")
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.gsub("@", "-at-")
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.gsub(/[ _·•]/, "-")
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.gsub(/[^\w-]/, "")
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.gsub(/--+/, "-")
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.delete_prefix("-")
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.delete_suffix("-")
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end
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sig { returns(String) }
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def self.error_message_with_suggestions
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<<~EOS
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Follow the instructions here:
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#{Formatter.url(BUG_REPORTS_URL)}
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EOS
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end
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def self.method_missing_message(method, token, section = nil)
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message = +"Unexpected method '#{method}' called "
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message << "during #{section} " if section
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message << "on Cask #{token}."
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ofail "#{message}\n#{error_message_with_suggestions}"
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end
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end
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end
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