bug#26803: [PATCH 15/36] gnu: Add java-commons-io.

[Ricardo Wurmus <rekado@elephly.net>]

Roel Janssen <roel@gnu.org> writes:

> Ricardo Wurmus writes:
>
>> Roel Janssen <roel@gnu.org> writes:
>>
>>> Ricardo Wurmus writes:
>>>
>>>> From: Hartmut Goebel <h.goebel@crazy-compilers.com>
>>>>
>>>> * gnu/packages/java.scm (java-commons-io): New variable.
>>>>
>>>> Co-authored-by: Ricardo Wurmus <rekado@elephly.net>
>>>> ---
>> […]
>>>> +    (arguments
>>>> +     `(#:test-target "test"
>>>> +       #:phases
>>>> +       (modify-phases %standard-phases
>>>> +         (add-after 'unpack 'symlink-junit.jar
>>>> +           (lambda* (#:key inputs #:allow-other-keys)
>>>> +             ;; TODO: don't do this; use make-flags
>>>> +             ;; The existence of this file is taken as indicator whether test
>>>> +             ;; dependencies will to be downloaded.
>>>> +             (let ((junit (assoc-ref inputs "java-junit"))
>>>> +                   (junit-version "4.12")) ; from build.xml
>>>> +               (mkdir-p "lib")
>>>> +               (symlink (string-append junit "/share/java/junit.jar")
>>>> +                        (string-append "lib/junit-" junit-version ".jar"))
>>>> +               #t)))
>>>
>>> I'm not sure how the result of the code here could be achieved
>>> using 'make-flags', so is the TODO item referring to an already-removed
>>> piece of code?
>>
>> Oh, I forgot about this.  It’s actually pretty easy to do this with
>> make-flags:
>>
>>        #:make-flags
>>        (list (string-append "-Djunit.jar="
>>                             (assoc-ref %build-inputs "java-junit")
>>                             "/share/java/junit.jar"))
>>
>> Much nicer than symlinking things!
>> I’ll push it with this change.
>
> Yes, definitely.  Very nice!
> Is the "lib" directory automatically created this way?

We don’t need it.  Instead of putting the file where the defaults want
it to be we just tell it to look elsewhere, so no directory needs to be
created at all.

--
Ricardo

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