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# frozen_string_literal: true
# This is a script to run a command in ARGV, expanding tabs in some files
# included by vm.c to normalize indentation of MJIT header. You can enable
# this feature by passing `--without-mjit-tabs` in configure.
#
# Note that preprocessor of GCC converts a hard tab to one spaces, where
# we expect it to be shown as 8 spaces. To obviate this script, we need
# to convert all tabs to spaces in these files.
require 'fileutils'
EXPAND_TARGETS = %w[
vm*.*
include/ruby/ruby.h
]
# These files have no hard tab indentations. Skip normalizing these files from the glob result.
SKIPPED_FILES = %w[
vm_callinfo.h
vm_debug.h
vm_exec.h
vm_opts.h
]
srcdir = File.expand_path('..', __dir__)
targets = EXPAND_TARGETS.flat_map { |t| Dir.glob(File.join(srcdir, t)) } - SKIPPED_FILES.map { |f| File.join(srcdir, f) }
sources = {}
mtimes = {}
mjit_tabs, *command = ARGV
targets.each do |target|
next if mjit_tabs != 'false'
unless File.writable?(target)
puts "tool/mjit_without_tabs.rb: Skipping #{target.dump} as it's not writable."
next
end
source = File.read(target)
begin
expanded = source.gsub(/^\t+/) { |tab| ' ' * 8 * tab.length }
rescue ArgumentError # invalid byte sequence in UTF-8 (Travis, RubyCI)
puts "tool/mjit_without_tabs.rb: Skipping #{target.dump} as the encoding is #{source.encoding}."
next
end
sources[target] = source
mtimes[target] = File.mtime(target)
if sources[target] == expanded
puts "#{target.dump} has no hard tab indentation. This should be ignored in tool/mjit_without_tabs.rb."
end
File.write(target, expanded)
FileUtils.touch(target, mtime: mtimes[target])
end
result = system(*command)
targets.each do |target|
if sources.key?(target)
File.write(target, sources[target])
FileUtils.touch(target, mtime: mtimes.fetch(target))
end
end
exit result
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