Add `do not modify' note at the top of generated C files

Fixes bug 595797.

1 files changed, 19 insertions, 1 deletions

diff --git a/ccode/valaccodewriter.vala b/ccode/valaccodewriter.vala
index 11559cd54..ff0677bce 100644
--- a/ccode/valaccodewriter.vala
+++ b/ccode/valaccodewriter.vala
@@ -32,6 +32,11 @@ public class Vala.CCodeWriter {
 	public string filename { get; set; }
 
 	/**
+	 * Specifies the source file used to generate this one.
+	 */
+	private string source_filename;
+
+	/**
 	 * Specifies whether to emit line directives.
 	 */
 	public bool line_directives { get; set; }
@@ -55,8 +60,9 @@ public class Vala.CCodeWriter {
 	/* at begin of line */
 	private bool _bol = true;
 	
-	public CCodeWriter (string filename) {
+	public CCodeWriter (string filename, string? source_filename = null) {
 		this.filename = filename;
+		this.source_filename = source_filename;
 	}
 
 	/**
@@ -74,6 +80,18 @@ public class Vala.CCodeWriter {
 			stream = FileStream.open (filename, "w");
 		}
 
+		write_string ("/* %s generated by valac, the Vala compiler".printf (Path.get_basename (filename)));
+
+		// Write the file name if known
+		if (source_filename != null) {
+			write_newline ();
+			write_string (" * generated from %s".printf (Path.get_basename (source_filename)));
+		}
+
+		write_string (", do not modify */");
+		write_newline ();
+		write_newline ();
+
 		return (stream != null);
 	}