bug#26770: [PATCH] gnu: tailon: Use absolute paths for commands.

[Christopher Baines <mail@cbaines.net>]

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On 17/05/17 15:53, Marius Bakke wrote:
> Christopher Baines <mail@cbaines.net> writes:
> 
>> On Mon, 15 May 2017 17:59:42 +0200
>> Marius Bakke <mbakke@fastmail.com> wrote:
>>
>>> Christopher Baines <mail@cbaines.net> writes:
>>>> +         (add-after 'install 'wrap-tailon-path
>>>> +                    (lambda* (#:key inputs outputs
>>>> #:allow-other-keys)
>>>> +                      (let ((out (assoc-ref outputs "out")))
>>>> +                        (substitute* (find-files out "commands.py")
>>>> +                          (("self\\.first_in_path\\('grep'\\)")
>>>> +                           (string-append"'" (which "grep") "'"))
>>>> +                          (("self\\.first_in_path\\('gawk',
>>>> 'awk'\\)")
>>>> +                           (string-append"'" (which "gawk") "'"))
>>>> +                          (("self\\.first_in_path\\('gsed',
>>>> 'sed'\\)")
>>>> +                           (string-append"'" (which "sed") "'"))
>>>> +                          (("self\\.first_in_path\\('gtail',
>>>> 'tail'\\)")
>>>> +                           (string-append"'" (which "tail") "'")))
>>>> +                        #t))))))  
>>>
>>> Is there any particular reason this phase runs after 'install'? I
>>> think we should try to avoid modifying files after they have been
>>> copied to the store, but if doing this substitution earlier is
>>> difficult I guess it's okay with a comment.
>>
>> No, I just put it there by default, but I can see why doing the
>> substitution earlier would be better. I've sent another patch that
>> moves it to after the unpack phase. 
> 
> Applied, thank you! My rationale was that the store may be on slow
> storage (say NFS), whereas the build directory is probably a tmpfs
> or local storage.
> 
> Note: I replaced the "find-files" invocation with just the one file
> path. Hope that was okay!

Yep, looks good. Thanks for your review :)



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