codewriter: Update timestamps of generated c-files if needed

If a changed source-file produces the same ccode we currently leave
existing files untouched. Although it is better to update the modification
timestamp of those to at least meet the one of associated source-file.

https://bugzilla.gnome.org/show_bug.cgi?id=683286

1 files changed, 8 insertions, 0 deletions

diff --git a/ccode/valaccodewriter.vala b/ccode/valaccodewriter.vala
index 281ff6e43..2e58a41b3 100644
--- a/ccode/valaccodewriter.vala
+++ b/ccode/valaccodewriter.vala
@@ -138,6 +138,14 @@ public class Vala.CCodeWriter {
 				FileUtils.rename (temp_filename, filename);
 			} else {
 				FileUtils.unlink (temp_filename);
+				if (source_filename != null) {
+					var stats = Stat (source_filename);
+					var target_stats = Stat (filename);
+					if (stats.st_mtime >= target_stats.st_mtime) {
+						UTimBuf timebuf = { stats.st_atime + 1, stats.st_mtime + 1 };
+						FileUtils.utime (filename, timebuf);
+					}
+				}
 			}
 		}
 	}