[PATCH] D80694: Improve lit.py's usability by highlighting failing lines.

[Varun Gandhi via Phabricator via llvm-commits]

varungandhi-apple added a comment.

Consider the test file:

  # RUN: true
  # RUN: false
  # RUN: true

After this patch, the default output becomes:

  ******************** TEST 'lit :: dummy.py' FAILED ********************
  
  Command Output (stdout, truncated):
  --
  $ ":" "RUN: at line 2"
  $ "false"
  note: command had no output on stdout or stderr
  error: command failed with exit status: 1
  
  --
  (NOTE: The failure may depend on preceding RUN lines.
         Use --verbose to see preceding RUN lines and outputs.)

If you use `-v`/`--verbose`, it becomes:

F12017804: Screen Shot 2020-05-28 at 12.10.46 AM.png <https://reviews.llvm.org/F12017804>


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D80694/new/

https://reviews.llvm.org/D80694