tree bf30addbfbf65d3ad9f131d627cce6756b53938e
parent 4bac211dcafc591c3e216bd3f15044a476301160
author Joel E. Denny <jdenny.ornl@gmail.com> 1571246484 +0000
committer Joel E. Denny <jdenny.ornl@gmail.com> 1571246484 +0000

[lit] Clean up internal diff's encoding handling

As suggested by rnk at D67643#1673043, instead of reading files
multiple times until an appropriate encoding is found, read them once
as binary, and then try to decode what was read.

For Python >= 3.5, don't fail when attempting to decode the
`diff_bytes` output in order to print it.

Avoid failures for Python 2.7 used on some Windows bots by
transforming diff output with `lit.util.to_string` before writing it
to stdout.

Finally, add some tests for encoding handling.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D68664

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375018 91177308-0d34-0410-b5e6-96231b3b80d8