Björn Höfling <bjoern.hoefling@bjoernhoefling.de> writes:

> * gnu/packages/geo.scm (geos): New variable.

Thanks for this! I've applied it with some minor changes, described
below:

> +(define-public geos
> +  (package
> +    (name "geos")
> +    (version "3.6.1")
> +    (source (origin
> +              (method url-fetch)
> +              (uri (string-append "http://download.osgeo.org/geos/geos-"
> +                                  version
> +                                  ".tar.bz2"))
> +              (sha256
> +               (base32
> +                "1icz31kd5sml2kdxhjznvmv33zfr6nig9l0i6bdcz9q9g8x4wbja"))))
> +    (build-system gnu-build-system)
> +    (arguments `(#:phases
> +                 (modify-phases %standard-phases
> +                   (add-after
> +                       'unpack 'patch-test-shebangs
> +                     (lambda _
> +                       (substitute* '("tests/xmltester/testrunner.sh"
> +                                      "tests/geostest/testrunner.sh")
> +                         (("/bin/sh") (which "bash")))

Bash behaves differently based on whether it's invoked as 'bash' or
'sh', so I changed this to (which "sh") to be safe.

> +                       #t)))))
> +    (inputs
> +     `(("glib" ,glib)))
> +    (home-page "https://geos.osgeo.org/")
> +    (synopsis "Geometry Engine - Open Source")

We try to avoid terms like "open source" or "free software" since it's
implied in the context of Guix.

> +    (description
> +     "GEOS (Geometry Engine - Open Source) is a C++ port of the
> +Java Topology Suite (JTS).  As such, it aims to contain the complete
> +functionality of JTS in C++.  This includes all the OpenGIS Simple Features
> +for SQL spatial predicate functions and spatial operators,
> +as well as specific JTS enhanced topology functions.")

I took inspiration from Debians description of this package and tweaked
it a little.

> +    (license license:lgpl2.1)))

The files do not mention whether it's 2.1 only or later versions so we
default to "or later". Also found a few files with other licenses.

Pushed as 252611c7c4e72577cd0c91a41e10176f37ac318b !