[lldb-dev] [PATCH] Intended install location for python scripts

[Abid, Hafiz]

Looks good to me. I tested it on my Ubuntu 12.04 and it worked ok. Thanks for doing it.

Regards,
Abid

From: lldb-dev-bounces at cs.uiuc.edu [mailto:lldb-dev-bounces at cs.uiuc.edu] On Behalf Of Todd Fiala
Sent: 03 December 2013 22:54
To: Greg Clayton
Cc: lldb-dev at cs.uiuc.edu
Subject: Re: [lldb-dev] [PATCH] Intended install location for python scripts

Attached please find a patch proposal to fix the following bug:

http://llvm.org/bugs/show_bug.cgi?id=18124

It makes the two changes we discussed:

* when copying scripts during 'make install', if the copying fails, the error is propagated to make and causes make to fail.

* the lldb python packages are now installed under the install tree, matching output from lldb -P.

I've tested it both with a parallel build tree and with an in-source build tree.  I also implemented the make failure propagation before doing the other change, verifying that my initial failure condition (permission problem due to lack of 'sudo') correctly fails the make.

I did not do anything with cmake builds.

Feedback is welcomed!

-Todd

On Tue, Dec 3, 2013 at 10:09 AM, Todd Fiala <tfiala at google.com<mailto:tfiala at google.com>> wrote:
Excellent.  Thanks, Greg!

I'll get a patch together following that approach unless anything further develops here.

On Tue, Dec 3, 2013 at 10:00 AM, Greg Clayton <gclayton at apple.com<mailto:gclayton at apple.com>> wrote:

On Dec 3, 2013, at 9:46 AM, Todd Fiala <tfiala at google.com<mailto:tfiala at google.com>> wrote:

> Hi all,
>
> I started digging into the 'make install' python script installation issue listed on another thread.  Here's the ticket for it:
>
> http://llvm.org/bugs/show_bug.cgi?id=18124
>
> I've added some comments to the bug.  My initial digging leads to a few questions:
>
> 1. Where do we expect a configure/make/make install to place the python scripts?  I was under the impression the scripts should be installed in the same directory tree implied by the configure --prefix arg, which is also what a `lldb -P` reports.  However, what I'm finding is that the 'make install' step is trying to install the python scripts into the python interpreter's dist-packages location.  I'm getting these failures on install because I'm not doing a 'sudo' on my make install.
>
>     llvm[4]: Installing Debug+Asserts LLDB python modules
>     mkdir: cannot create directory `/usr/lib/python2.7/dist-packages/lldb': Permission denied
>     Error: Unable to find or create /usr/lib/python2.7/dist-packages/lldb
>     make[4]: Leaving directory `/usr/local/google/home/tfiala/llvm/work/build-debug/tools/lldb/source/Interpreter'
>
> Do we want the python scripts installing into the python executable's dist-packages or the location reported by lldb -P?
Yes, this would allow multiple installs of LLDB to co-exist without stomping on the previous LLDB's python modules (which could be very different).

>  My first stab would be it should go in the installation prefix paths as I would not expect any code to be installed outside of the prefix and, possibly, require a sudo when I'm trying to do everything locally without elevated privileges.
>
> 2. Should 'make install' fail if we fail to copy over python files? My first take is that a failure to install the scripts should qualify as an all-out failure and cause make to fail (i.e. fail early, fail loudly); otherwise, we can get quite a bit past the root cause of scripting-related failures without realizing what's broken.
>
> Any opinions on this?  My straw-man answers are:
>
> 1. Install into the tree implied by configure --prefix, not into the python dist-packages dir.  (A close second would be to specify a new configure path variable so the user can configure, possibly adjusting the output of lldb -P to match).
The --prefix path sounds right to be for coexistence.

>
> 2. Change makefiles so that failure to copy scripts fails the install.
Agreed.

>
> I'll fix up whatever we decide here if it requires a change.
>
> Thanks!
>
> Sincerely,
> Todd Fiala
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