TravisCI build with Python deps

Internals & Design
2

If you put setups in .travis.yml, you’ll have trouble with CIBot when registering the package (see The current METADATA release process). Maybe put something like this in your deps/build.jl (untested):

using Pkg

if lowercase(get(ENV, "CI", "false")) == "true"
    let basepython = get(ENV, "PYTHON", "python")
        envpath = joinpath(@__DIR__, "env")
        run(`virtualenv --python=$basepython $envpath`)

        if Sys.iswindows()
            python = joinpath(envpath, "Scripts", "python.exe")
        else
            python = joinpath(envpath, "bin", "python")
        end
        run(`$python -m pip install basemap`)

        ENV["PYTHON"] = python
        Pkg.build("PyCall")
    end
end

It’s a bit ugly to build PyCall again in your build process, but you can’t avoid it if you want to change Python path.

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