[lldb-dev] Refactoring dotest as a Python package

Zachary Turner via lldb-dev lldb-dev at lists.llvm.org
Wed Oct 28 12:21:47 PDT 2015

Committed r251544 to try to fix this.

On Wed, Oct 28, 2015 at 12:18 PM Zachary Turner <zturner at google.com> wrote:

> It's saying "import: command not found".  Do I need to put a
> `#!/usr/bin/env python` or something at the top?  I thought by virtue of
> having a .py extension this would be handled, but maybe not.
> On Wed, Oct 28, 2015 at 12:16 PM Zachary Turner <zturner at google.com>
> wrote:
>> We can set executable permissions
>> on packages/Python/lldbsuite/test/dotest.py for now.  I suppose that's
>> actually necessary for now since it does tget executed indirectly by dosep.
>> I plan to remove the need for this, and at the same time make it fail if
>> you try to run that file directly.  Will that fix this problem?  It's not
>> clear to me from looking at this log if that is the problem
>> On Wed, Oct 28, 2015 at 11:50 AM Oleksiy Vyalov <ovyalov at google.com>
>> wrote:
>>> Linux build bot is failing
>>> http://lab.llvm.org:8011/builders/lldb-x86_64-ubuntu-14.04-cmake/builds/7895
>>> :
>>> /lldb-buildbot/lldbSlave/buildWorkingDir/scripts/../llvm/tools/lldb/test/dotest.py
>>> --executable
>>> /lldb-buildbot/lldbSlave/buildWorkingDir/scripts/../build/bin/lldb -A i386
>>> -C clang-3.5 -s logs-clang-3.5-i386 -u CXXFLAGS -u CFLAGS --channel
>>> "gdb-remote packets" --channel "lldb all"
>>> /lldb-buildbot/lldbSlave/buildWorkingDir/scripts/../llvm/tools/lldb/test/dotest.py:
>>> line 1: import: command not found
>>> /lldb-buildbot/lldbSlave/buildWorkingDir/scripts/../llvm/tools/lldb/test/dotest.py:
>>> line 3: import: command not found
>>> /lldb-buildbot/lldbSlave/buildWorkingDir/scripts/../llvm/tools/lldb/test/dotest.py:
>>> line 5: syntax error: unexpected end of file
>>> Should we run packages/Python/lldbsuite/test/dotest.py instead of
>>> test/dotest.py?
>>> If yes, can we set executable permissions on
>>>  packages/Python/lldbsuite/test/dotest.py?
>>> On Wed, Oct 28, 2015 at 10:54 AM, Zachary Turner via lldb-dev <
>>> lldb-dev at lists.llvm.org> wrote:
>>>> This is in right now (without my proposed change from previous email,
>>>> although I can make that as a followup since it's just cleanup)
>>>> In any case, let me know if anything blows up.  It took 35 minutes just
>>>> to commit, so hopefully any problems that arise can be fixed with localized
>>>> patches instead of revert.  Although I'm still open to that if it's really
>>>> the only way to get things fixed.
>>>> On Tue, Oct 27, 2015 at 8:12 PM Zachary Turner <zturner at google.com>
>>>> wrote:
>>>>> Todd, I have one question.  If I understand correctly, we currently
>>>>> run dotest.py as a script, which imports dosep and calls some method in
>>>>> dosep, and dosep then again exec's dotest.
>>>>> Can you think of a pythonic way to make this work under the new
>>>>> layout?  To be clear, I have it working, just not in a pythonic way.  The
>>>>> problem is that if we put code in lldbsuite's __init__.py, then this
>>>>> code won't be run when we exec dotest, because we'll be running it as a
>>>>> script instead of importing it as a package.  __init__.py is a very handy
>>>>> way to run some per-package initialization, so I'd like to be able to take
>>>>> advantage of it.
>>>>> The way I currently have it working is just write `import lldbsuite`
>>>>> at the top of dotest.py, but that seems a little arbitrary that a file
>>>>> can't be exec'ed unless it imports the package that it's supposed to be
>>>>> contained in.
>>>>> So to re-iterate: the problem is that under the new layout the user
>>>>> will run lldb/test/dotest.py, but dosep will try to exec
>>>>> lldb/packages/Python/lldbsuite/test/dotest.py, which is intended to be
>>>>> imported as a package.
>>>>> What if we have dosep instead do this:
>>>>> # Execute the same script that the user originall ran from the command
>>>>> line,
>>>>> # which under this new system will be lldb/test/dotest.py, even though
>>>>> dosep
>>>>> # and the *real* dotest now reside in
>>>>> lldb/packages/Python/lldbsuite/test
>>>>> import __main__ as main
>>>>> exec main.__file__
>>>>> Can you think of any problem with this?  Another option is to use
>>>>> sys.argv[0].  Not sure if there's any practical difference between the two
>>>>> methods.
>>>>> On Tue, Oct 27, 2015 at 7:29 PM Zachary Turner <zturner at google.com>
>>>>> wrote:
>>>>>> Ok, I'll do it tomorrow.  Since it's a big code move I was a little
>>>>>> worried it would break someone's bot or the Xcode build, but I guess we can
>>>>>> deal with issues that pop up afterwards.
>>>>>> On Tue, Oct 27, 2015 at 5:14 PM Jim Ingham <jingham at apple.com> wrote:
>>>>>>> It seems like everybody is okay with the idea of this, so I don't
>>>>>>> see the need for a review of the details of this stage.  If you think
>>>>>>> there's anything tricky call it out in words, otherwise I say just commit
>>>>>>> it.
>>>>>>> Jim
>>>>>>> > On Oct 27, 2015, at 4:30 PM, Zachary Turner via lldb-dev <
>>>>>>> lldb-dev at lists.llvm.org> wrote:
>>>>>>> >
>>>>>>> > I have the first part of the patch in, and the second part of the
>>>>>>> patch (which is essentially just a whole-folder rename with a couple of
>>>>>>> fixups) ready to go.  What's the best way to have this reviewed?  Uploading
>>>>>>> a 7MB patch to Phabricator probably isn't going to work out very well.
>>>>>>> >
>>>>>>> > On Tue, Oct 27, 2015 at 1:40 PM Zachary Turner <zturner at google.com>
>>>>>>> wrote:
>>>>>>> > I think I have a way to split this into two smaller CLs.  I'm
>>>>>>> testing this at the moment, if so it will allow the first CL to be most of
>>>>>>> the preparation for the rename without the rename, and then the second CL
>>>>>>> should literally just be a straight move with only 1-2 line code change.
>>>>>>> So I'll try to put this first CL up for review shortly.
>>>>>>> >
>>>>>>> > On Tue, Oct 27, 2015 at 12:49 PM Zachary Turner <
>>>>>>> zturner at google.com> wrote:
>>>>>>> > I've got a patch locally to make all of our Python stuff part of
>>>>>>> an lldb package called `lldbsuite`.  Currently we've got a bunch of
>>>>>>> standalone scripts that live in various directories such as `lldb/test`, or
>>>>>>> `lldb/scripts`, and possibly some  other locations, and this organization
>>>>>>> makes it hard to share code because it is incompatible with Python's
>>>>>>> built-in code reuse mechanism, which is its package system.
>>>>>>> >
>>>>>>> > The problem is, this patch is *big*.  Functionally there weren't
>>>>>>> many major changes, but it renames the entire test directory.  To be clear,
>>>>>>> it still leaves `test/dotest.py` in place, so nobody has to change their
>>>>>>> workflow or do anything differently.  If you used to write "cd test &&
>>>>>>> dotest.py" you can still do that.  dotest.py is now just a 2 line wrapper
>>>>>>> around the package, so it looks like:
>>>>>>> >
>>>>>>> > import lldbsuite.test
>>>>>>> > lldbsuite.test.run_suite()
>>>>>>> >
>>>>>>> > the advantage of this method is that lldbsuite can contain
>>>>>>> subpackages.  It already contains one subpackage, which is lldbsuite.test,
>>>>>>> and I plan to move some of the Python code in `lldb/scripts` there as well,
>>>>>>> so that we have lldbsuite.scripts.  Then we can add a third submodule,
>>>>>>> lldbsuite.shared, and now dotest can share code with scripts, and it gives
>>>>>>> us a nice place to put stuff that previously had been copied all around.
>>>>>>> >
>>>>>>> > It also gives us a nice way to perform module-wide initialization
>>>>>>> that we don't have to repeat in every single test, such as writing "import
>>>>>>> lldb_shared" at the top of every file, since that can be done as part of
>>>>>>> lldbsuite/__init__.py.
>>>>>>> >
>>>>>>> >
>>>>>>> > In any case, I have this all working on my machine, but I would
>>>>>>> like to see if someone can try my patch out on other platforms.  The size
>>>>>>> of the patch presents a problem though - it's over 7MB since it renames a
>>>>>>> very large directory.
>>>>>>> >
>>>>>>> > As usual, comments / concerns also welcome.
>>>>>>> > _______________________________________________
>>>>>>> > lldb-dev mailing list
>>>>>>> > lldb-dev at lists.llvm.org
>>>>>>> > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
>>>> _______________________________________________
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>>> --
>>> Oleksiy Vyalov | Software Engineer | ovyalov at google.com
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