[Nix-dev] Packaging Bash Scripts

[Sergey Mironov]

Thanks a lot, I missed this helpful package.

2012/8/30 Alexander Foremny <alexanderforemny at gmail.com>:
> Dear Shea,
>
> thank you very much. Everything works as expected now.
>
> Regards,
> Alexander Foremny
>
> PS. Forwarding to the list. Shea, sorry for the noise.
>
> 2012/8/30 Shea Levy <shea at shealevy.com>:
>> On 08/29/2012 09:20 AM, Alexander Foremny wrote:
>>>
>>> Hello Shea,
>>>
>>> thank you very much for your response! I modified my Nix expression
>>> [1]. Is this correct?
>>
>>
>> It looks like you forget to specify what to set $PATH to, I think you need
>> to specify ${curl}/bin or some such
>>
>>
>>> Is there a way to test if things are actually working? Apparently I
>>> cannot remove curl from my profile.
>>
>>
>> If you check the resultant binary (it will be a shell script if created with
>> wrapProgram), you should see $PATH getting set (or augmented) with the
>> relevant path.
>>
>>
>>>> $ nix-env -e curl
>>>> $ curl --help
>>>> Usage: curl [options...]<url>
>>>> ...
>>>
>>> The commands above prints curl's help text which I did not expect.
>>>
>>> Regards,
>>> Alexander Foremny
>>>
>>> [1]
>>> https://github.com/aforemny/nixpkgs/blob/aed5c366944b98624411c5551f2d43becafdf44d/pkgs/tools/misc/plowshare/default.nix
>>>
>>> 2012/8/29 Shea Levy<shea at shealevy.com>:
>>>>
>>>> Hi Alexander,
>>>>
>>>>
>>>> On 08/29/2012 05:27 AM, Alexander Foremny wrote:
>>>>>
>>>>> Hello list,
>>>>>
>>>>> I am currently trying to create a Nix expression for plowshare [1]. I
>>>>> got a working version [2] already, since installation is quite
>>>>> straight forward. However, as mentioned in the pull request I am
>>>>> worrying about purity.
>>>>>
>>>>> In particular the Bash script calls the curl binary. The first
>>>>> observation is that running one of plowshare's executables the curl
>>>>> binary is being found correctly. I think this is because curl is
>>>>> available in my PATH.
>>>>>
>>>>>> $ which curl
>>>>>> ~/.nix-profile/bin/curl
>>>>>
>>>>> I would have expected that this wouldn't be the case if I had removed
>>>>> curl from my environment. However, the following still yields the same
>>>>> result.
>>>>>
>>>>>> $ nix-env -e curl
>>>>>> $ which curl
>>>>>> ~/.nix-profile/bin/curl
>>>>>
>>>>> This also arises in a newly created shell and I can also execute the
>>>>> curl binary. I am guessing that curl is some kind of NixOS' standard
>>>>> environment. Is this correct?
>>>>>
>>>>> Is it considered an impurity that plowshare finds curl without
>>>>> depending on curl's derivation? If this is the case, is this impurity
>>>>> introduced by NixOS or by the Nix expression?
>>>>
>>>>
>>>> It's an impurity in plowshare's nix expression.
>>>>
>>>>
>>>>> If this is an issue, how would I solve it? Should I patch plowshare's
>>>>> Bash scripts to refer to the curl's derivation instead of `which
>>>>> curl`? Or even better, is there a wrapper for this kind of programs
>>>>> already?
>>>>
>>>>
>>>> wrapProgram (available if you add makeWrapper to buildInputs) is probably
>>>> what you want. An example of how it can be used is at
>>>>
>>>> https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/taxes/aangifte-2011/default.nix#L30
>>>>
>>>>> Regards,
>>>>> Alexander Foremny
>>>>>
>>>>> [1] http://code.google.com/p/plowshare/
>>>>> [2] https://github.com/NixOS/nixpkgs/pull/117
>>>>> _______________________________________________
>>>>> nix-dev mailing list
>>>>> nix-dev at lists.science.uu.nl
>>>>> http://lists.science.uu.nl/mailman/listinfo/nix-dev
>>>>
>>>>
>>
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