diff options
Diffstat (limited to 'ext/extmk.rb')
| -rwxr-xr-x | ext/extmk.rb | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/ext/extmk.rb b/ext/extmk.rb index ef9afa0676..97819ff4a5 100755 --- a/ext/extmk.rb +++ b/ext/extmk.rb @@ -69,6 +69,18 @@ def system(*args) super end +def atomic_write_open(filename) + filename_new = filename + ".new.#$$" + open(filename_new, "wb") do |f| + yield f + end + if File.binread(filename_new) != (File.binread(filename) rescue nil) + File.rename(filename_new, filename) + else + File.unlink(filename_new) + end +end + def extract_makefile(makefile, keep = true) m = File.read(makefile) if !(target = m[/^TARGET[ \t]*=[ \t]*(\S*)/, 1]) @@ -229,7 +241,7 @@ def extmake(target) f.truncate(f.pos) end unless $static else - open(makefile, "wb") do |f| + atomic_write_open(makefile) do |f| f.puts "# " + DUMMY_SIGNATURE f.print(*dummy_makefile(CONFIG["srcdir"])) end @@ -636,7 +648,7 @@ $mflags.unshift("topdir=#$topdir") ENV.delete("RUBYOPT") if $configure_only and $command_output exts.map! {|d| "ext/#{d}/."} - open($command_output, "wb") do |mf| + atomic_write_open($command_output) do |mf| mf.puts "V = 0" mf.puts "Q1 = $(V:1=)" mf.puts "Q = $(Q1:0=@)" |