Re: [PATCH 5/6] gnu: Add borg.

[Leo Famulari <leo@famulari.name>]

On Tue, Mar 15, 2016 at 12:11:15PM +0300, Alex Kost wrote:
> Leo Famulari (2016-03-15 02:34 +0300) wrote:
> 
> > * gnu/packages/backup.scm (borg): New variable.
> > ---
> >  gnu/packages/backup.scm | 53 ++++++++++++++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 52 insertions(+), 1 deletion(-)
> [...]
> > +(define-public borg
> > +  (package
> > +    (name "borg")
> > +    (version "1.0.0")
> > +    (source (origin
> > +              (method url-fetch)
> > +              (uri (pypi-uri "borgbackup" version))
> > +              (sha256
> > +               (base32
> > +                "0wa6cvqs3rni5nwrgagigchcly8a53rxk56z0zn8iaii2cqrw2sh"))))
> > +    (build-system python-build-system)
> > +    (arguments
> > +     `(#:phases
> > +       (modify-phases %standard-phases
> > +         (add-before 'build 'set-openssl-prefix
> > +           (lambda* (#:key inputs #:allow-other-keys)
> > +             (setenv "BORG_OPENSSL_PREFIX" (assoc-ref inputs "openssl"))
> > +             #t))
> > +         (add-before 'build 'set-lz4-prefix
> > +           (lambda* (#:key inputs #:allow-other-keys)
> > +             (setenv "BORG_LZ4_PREFIX" (assoc-ref inputs "lz4"))
> > +             #t))
> 
> Would it be better to make a single 'set-env' phase instead?  Or better
> yet, are these '..._PREFIX' variables used for make command?  If so,
> they should be specified in #:make-flags argument.

Thank you, that makes the recipe shorter and clearer.

> 
> > +         (add-after 'install 'docs
> > +           (lambda* (#:key outputs #:allow-other-keys)
> > +             (let* ((out (assoc-ref outputs "out"))
> > +                    (man (string-append out "/share/man/man1")))
> > +               (and
> > +                 (zero? (system* "make" "-C" "docs" "man"))
> > +                 (install-file "docs/_build/man/borg.1" man)))
> 
> Since 'install-file' does not specify a returned value, and we are not
> really interested in the returned value, I think it is better to use
> 'when' instead of 'and' here:
> 
>                (when (zero? (system* "make" "-C" "docs" "man"))
>                  (install-file "docs/_build/man/borg.1" man))

Okay, that makes sense.

> 
> > +             #t)))))
> 
> -- 
> Alex