[CMake] Continue install after a failure

[Eric Noulard]

2012/10/23 David Cole <david.cole at kitware.com>:
> On Tue, Oct 23, 2012 at 2:53 AM, Petr Kmoch <petr.kmoch at gmail.com> wrote:
>> On Mon, Oct 22, 2012 at 4:58 PM, David Cole <david.cole at kitware.com> wrote:
>>>
>>> On Mon, Oct 22, 2012 at 3:22 AM, Petr Kmoch <petr.kmoch at gmail.com> wrote:
>>> > Hi Andreas,
>>> >
>>> > thanks for your tip. Unfortunately, 'make -k install' doesn't help, as
>>> > the
>>> > entire install step is a single command (cmake -P ...), so once this
>>> > fails,
>>> > there is no other command make could continue with. Is there no way to
>>> > do
>>> > this natively in cmake?
>>> >
>>> > I could (in theory) add OPTIONAL to all install() commands, but that has
>>> > the
>>> > problem of being absolutely silent when a file is not found, and I'd
>>> > need at
>>> > least a message or warning. Is cmake really all-or-nothing in this
>>> > aspect,
>>> > or does anyone know a feature I'm overlooking?
>>> >
>>> > Thanks for any help.
>>> >
>>> > Petr
>>> >
>>> >
>>> > On Sat, Oct 20, 2012 at 12:46 PM, Andreas Pakulat <apaku at gmx.de> wrote:
>>> >>
>>> >> Hi,
>>> >>
>>> >> On Sat, Oct 20, 2012 at 11:39 AM, Petr Kmoch <petr.kmoch at gmail.com>
>>> >> wrote:
>>> >> > when running the install step of a CMake-generated buildsystem (i.e.
>>> >> > 'make
>>> >> > install' or building the VS project INSTALL), the run terminates
>>> >> > after
>>> >> > the
>>> >> > first failure (e.g. when it cannot find a file which is to be
>>> >> > installed). Is
>>> >> > there a way to globally change this behaviour so that the error is
>>> >> > reported
>>> >> > (perhaps as a warning), but the install step goes on?
>>> >>
>>> >> For Makefile Generator you can run make -k install, that way make
>>> >> keeps on going even when errors occur. No idea about VS, NMake, Ninja
>>> >> or XCode generators probably depends on wether the respective tool has
>>> >> a switch for continuing if errors occur.
>>> >>
>>> >> Andreas
>>> >
>>> >
>>> >
>>> > --
>>> >
>>> > Powered by www.kitware.com
>>> >
>>> > Visit other Kitware open-source projects at
>>> > http://www.kitware.com/opensource/opensource.html
>>> >
>>> > Please keep messages on-topic and check the CMake FAQ at:
>>> > http://www.cmake.org/Wiki/CMake_FAQ
>>> >
>>> > Follow this link to subscribe/unsubscribe:
>>> > http://www.cmake.org/mailman/listinfo/cmake
>>>
>>>
>>> CMake is all-or-nothing with respect to an install tree. If the cmake
>>> install script hits a "FATAL_ERROR" message then it stops and will not
>>> continue beyond that point...
>>>
>>> The best way to "Continue install after a failure" is to eliminate the
>>> failure, and try again.
>>
>>
>> Would you accept a patch giving control over this behaviour? Something like
>> a boolean variable CMAKE_INSTALL_STOP_ON_ERROR (the default being TRUE, of
>> course).
>>
>> Petr
>
> Why is patching CMake easier than fixing your project? And how long
> are you going to let your own project's install tree be broken before
> you do fix it?
>
> I don't like the idea of a half-installed (or any fraction less than
> 1.0) bit of software...

Me neither.

>
> Perhaps others will chime in and we can get a sense of how folks weigh
> in on this issue.

My personal opinion is that may be the only feature I'd like would be a
"real fake install" i.e. 0% installed not a possibly random X percent
installed with random leftover.

it could be callable like:
make fake-install or check-install or ... set(CMAKE_FAKE_INSTALL 1) or ...

which would check whether all need-to be installed bits are accessibles.
This would basically put the file(INSTALL ...) sub-command in a mode
that would only check access and print-out some informations message
without moving, copying or renaming any files or directory.

e.g:

-- Would be Up-to-date: .../share/aclocal/cmake.m4
-- Would be Installing: ..../doc/cmake-2.8/cpack.html

instead of
-- Up-to-date: .../share/aclocal/cmake.m4
-- Installing: .../doc/cmake-2.8/cpack.html

That said I did live without that feature until now so I bet I can
live without it forever :-]

-- 
Erk
Le gouvernement représentatif n'est pas la démocratie --
http://www.le-message.org