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George Karpenkov 800a42cc58 [lit] add a -vv option to echo all executed commands. Debugging LIT scripts can be rather painful, as LIT directly does not specify which line has failed. Rather, FileCheck is expected to report the failing location, but it can be often ambiguous if multiple commands are tested against the same prefix. This change adds a -vv option, which echoes all output. Then detecting the error becomes straightforward: last printed line is the failing one. Of course, it could be desired to try to get failing line number directly from bash, but it involves excessive hacks on older bash versions (cf. https://stackoverflow.com/questions/24398691/how-to-get-the-real-line-number-of-a-failing-bash-command) Differential Revision: https://reviews.llvm.org/D35330 llvm-svn: 307938		2017-07-13 19:26:27 +00:00
..
examples
lit	[lit] add a -vv option to echo all executed commands.	2017-07-13 19:26:27 +00:00
tests	[lit] Modify LIT to accept environment variable LIT_FILTER to select tests.	2017-07-07 00:22:11 +00:00
utils
lit.py	[lit] Remove (or allow specific) unused imports	2016-10-10 01:22:06 +00:00
MANIFEST.in
README.txt	[lit] Remove TODO	2016-11-03 23:41:49 +00:00
setup.py

README.txt

===============================
 lit - A Software Testing Tool
===============================

lit is a portable tool for executing LLVM and Clang style test suites,
summarizing their results, and providing indication of failures. lit is designed
to be a lightweight testing tool with as simple a user interface as possible.

=====================
 Contributing to lit
=====================

Please browse the Test Suite > lit category in LLVM's Bugzilla for ideas on
what to work on.

Before submitting patches, run the test suite to ensure nothing has regressed:

    # From within your LLVM source directory.
    utils/lit/lit.py \
        --path /path/to/your/llvm/build/bin \
        utils/lit/tests

Note that lit's tests depend on 'not' and 'FileCheck', LLVM utilities.
You will need to have built LLVM tools in order to run lit's test suite
successfully.

You'll also want to confirm that lit continues to work when testing LLVM.
Follow the instructions in http://llvm.org/docs/TestingGuide.html to run the
regression test suite:

    make check-llvm

And be sure to run the llvm-lit wrapper script as well:

    /path/to/your/llvm/build/bin/llvm-lit utils/lit/tests

Finally, make sure lit works when installed via setuptools:

    python utils/lit/setup.py install
    lit --path /path/to/your/llvm/build/bin utils/lit/tests