# Macro to replace overly complicated references to PyPI source files.

# Expands to the pythonhosted URL for a package

# Accepts zero to three arguments:

# 1:  The PyPI project name, defaulting to %srcname if it is defined, then

#     %pypi_name if it is defined, then just %name.

# 2:  The PYPI version, defaulting to %version.

# 3:  The file extension, defaulting to "tar.gz".  (A period will be added

#     automatically.)

# Requires %__pypi_url and %__pypi_default_extension to be defined.

%__pypi_url https://files.pythonhosted.org/packages/source/

%__pypi_default_extension tar.gz

%pypi_source() %{lua:

    local src = rpm.expand('%1')

    local ver = rpm.expand('%2')

    local ext = rpm.expand('%3')

    local url = rpm.expand('%__pypi_url')

\

    -- If no first argument, try %srcname, then %pypi_name, then %name

    -- Note that rpm leaves macros unchanged if they are not defined.

    if src == '%1' then

        src = rpm.expand('%srcname')

    end

    if src == '%srcname' then

        src = rpm.expand('%pypi_name')

    end

    if src == '%pypi_name' then

        src = rpm.expand('%name')

    end

\

    -- If no second argument, use %version

    if ver == '%2' then

        ver = rpm.expand('%version')

    end

\

    -- If no third argument, use the preset default extension

    if ext == '%3' then

        ext = rpm.expand('%__pypi_default_extension')

    end

\

    local first = string.sub(src, 1, 1)

\

    print(url .. first .. '/' .. src .. '/' .. src .. '-' .. ver .. '.' .. ext)

}