[Scons-users] interrupted or failed build action handling

[Bill Deegan]

You didn't answer my question..

> From the above it sounds like you really have one
> env.Command(target,source,[pre, doit, post ] ) ?
>


On Thu, Apr 30, 2020 at 8:39 AM daggs <daggs at gmx.com> wrote:

> Greetings Bill,
>
> you are correct about the blank source, I don't think I'll use one, I'll
> check the code, can't remember.
> the prep verifies inside if the all is ready and if not, it will delete it
> and rebuild it.
> I don't mind running prep all the time even if it means it will run
> unneededly.
>
> as I thought of using two env.Command which are depenednet on each other.
> e.g. prep = env.Command(...)
> bind = env.Command(...)
> Depends(bind, prep)
>
> am I doing something wrong?
>
> Dagg.
>
> *Sent:* Thursday, April 30, 2020 at 12:09 AM
> *From:* "Bill Deegan" <bill at baddogconsulting.com>
> *To:* "SCons users mailing list" <scons-users at scons.org>
> *Subject:* Re: [Scons-users] interrupted or failed build action handling
> Dagg,
>
> You should almost never have a blank source. That's a good indicator that
> you're doing something wrong.
> How would any build system know when to rebuild?
>
> From the above it sounds like you really have one
> env.Command(target,source,[pre, doit, post ] ) ?
>
> -Bill
>
> On Wed, Apr 29, 2020 at 12:36 PM daggs <daggs at gmx.com> wrote:
>
>> I'll try to create one.
>>
>> Dagg.
>>
>> *Sent:* Wednesday, April 29, 2020 at 10:09 PM
>> *From:* "Bill Deegan" <bill at baddogconsulting.com>
>> *To:* "SCons users mailing list" <scons-users at scons.org>
>> *Subject:* Re: [Scons-users] interrupted or failed build action handling
>> Dagg,
>>
>> Can you make a simple complete example of what you're trying to do and
>> post it on github, or pastebin it somewhere?
>>
>> _Bill
>>
>> On Wed, Apr 29, 2020 at 12:08 PM Bill Deegan <bill at baddogconsulting.com>
>> wrote:
>>
>>> Dagg,
>>>
>>> You can't have actions depend on each other.
>>> Do you mean builders?
>>>
>>> -Bill
>>>
>>> On Wed, Apr 29, 2020 at 12:02 PM daggs <daggs at gmx.com> wrote:
>>>
>>>> Greetings Mats,
>>>>
>>>> > Sent: Wednesday, April 29, 2020 at 9:34 PM
>>>> > From: "Mats Wichmann" <mats at wichmann.us>
>>>> > To: scons-users at scons.org
>>>> > Subject: Re: [Scons-users] interrupted or failed build action handling
>>>> >
>>>> > On 4/29/20 12:22 PM, daggs wrote:
>>>> > > Greetings Bill,
>>>> > >
>>>> > > you are correct, I'll clarify.
>>>> > > I have an existing scons env that builds a product.
>>>> > > I have a bash script that has three funcs, prep, bind and unbind.
>>>> > >
>>>> > > I want to do the following:
>>>> > > prep => bind => build product => unbind.
>>>> > > when no matter how the build ends (success, failure or user
>>>> > > interruption), unbind will be called.
>>>> > > I thought adding prep as action, bind as another action which is
>>>> > > depended on prep and set bind as depdency of the first action of
>>>> the build.
>>>> > > to warp it up, I thought of registering the unbind as an atexit
>>>> handler
>>>> > > and register the it to sigterm and sigint too.
>>>> > >
>>>> > > I wondered if there is a more elegant way to do it.
>>>> >
>>>> > This you should be able to do at the shell level, to keep it simple.
>>>> >
>>>> > scons should have exit codes you can use to decide what to do if the
>>>> > build fails - it will return 0 on success, non-zero on fail.
>>>> >
>>>> > For example, trivial SConstruct which tries to build from a source
>>>> file
>>>> > which doesn't exist:
>>>> >
>>>> > $ scons-3 -f scons-bad.py
>>>> > scons: Reading SConscript files ...
>>>> > scons: done reading SConscript files.
>>>> > scons: Building targets ...
>>>> > scons: *** [foo.o] Source `foo.c' not found, needed by target `foo.o'.
>>>> > scons: building terminated because of errors.
>>>> > $ echo $?
>>>> > 2
>>>> >
>>>> >
>>>> > Does this help?
>>>>
>>>> I'd rather not have a wrapper func, I got to much smartasses in my
>>>> company that will not use it or use it wrongly.
>>>>
>>>> Dagg.
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>>>
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