No versioned download? :-/

At the very least, let EasyBuild rename the file on download, something like:

sources = [{
    'download_filename': 'godon-master-linux-gnu-x86_64',
    'filename': 'godon-%(version)s-linux-gnu-x86_64',
}]

It's much better to use a download URL or filename that includes a version though, if that's available, since otherwise the download will be broken due to getting a different checksum if there's an update...

the source code is available too (it's written in Go), so we could look at a from-source build too. Looks like it relies on NLOpt and a BLAS implementation

I tried to compile it several times, but it always failed in my hands, as most Go packages do.

There is no version for the binary download, that's why I used the last change date

Building from source would indeed be better, but the versionsuffix makes it very clear we're using a pre-built binary here, so no blocker to merge this

Use install_cmd instead?

Right

Please remove duplicate empty line

Right

There's no point in checking for a non-empty bin directory if we're already checking for a specific file in there, so:

sanity_check_paths = {
    'files': ["bin/godon"],
    'dirs': [],
}

Right

@smoretti You should definitely use %(version)s here, and probably also keep the x86_64 part, and then change install_cmd accordingly below:

sources = [{
    'download_filename': 'godon-master-linux-gnu-x86_64',
    'filename': 'godon-%(version)s-linux-gnu-x86_64',
}]
...
install_cmd = "mkdir -p %(installdir)s/bin/ && cp -a godon-%(version)s-linux-gnu-x86_64 %(installdir)s/bin/ && "
install_cmd += "cd %(installdir)s/bin && ln -s godon-%(version)s-linux-gnu-x86_64 godon"

Also use cp -a rather than mv, so you don't remove the downloaded file while installing

@boegel You mean also to change the version value "20210913" to "master"?

@smoretti

sources = [{
    'download_filename': 'godon-master-linux-gnu-x86_64',
    'filename': 'godon-%(version)s-linux-gnu-x86_64',
}]

will download the godon-master-linux-gnu-x86_64 file and save it as godon-%(version)s-linux-gnu-x86_64

Thanks