Store the SHA-256 of the source in files generated by regen_perly.pl

bison isn't available everywhere, so we can't simply re-run regen_perly.pl to
verify that perly.{act,h,tab} are up to date. So instead store the SHA-256 of
the input files, and extend t/porting/regen.t to check that the input files
haven't been changed subsequently.

1 files changed, 4 insertions, 1 deletions

diff --git a/perly.act b/perly.act
index ae8e330ff4..1da1819864 100644
--- a/perly.act
+++ b/perly.act
@@ -1709,4 +1709,7 @@ case 2:
       default: break;
     
 
-/* ex: set ro: */
+/* Generated from:
+ * bd41fc813e5d2d23ff7edef2ab1ef88bbb054176476b7d989db7522dce1c9328 perly.y
+ * dc72db91baa0a3c17a6c95718e5ad70e9ac7b75919df1317df7fe6c3f1649239 regen_perly.pl
+ * ex: set ro: */