source: spec/trunk/SPECS/python-rpm-macros/macros.python-srpm

# python3_pkgversion specifies the version of Python 3 in the distro.  It can be
# a specific version (e.g. 34 in Fedora EPEL7)
%python3_pkgversion 3

# Set to /bin/true to avoid %ifdefs and %{? in specfiles
%__python3_other /@unixroot/usr/bin/true
%py3_other_build /@unixroot/usr/bin/true
%py3_other_install /@unixroot/usr/bin/true



# === Macros for Build/Requires tags using Python dist tags ===
# - https://fedoraproject.org/wiki/Changes/Automatic_Provides_for_Python_RPM_Packages
# - These macros need to be in macros.python-srpm, because BuildRequires tags
#   get rendered as runtime requires into the metadata of SRPMs.

# Converts Python dist name to a canonical format
%py_dist_name() %{lua:\
        name = rpm.expand("%{?1:%{1}}");\
        canonical = string.gsub(string.lower(name), "%W+", "-");\
        print(canonical);\
}

# Creates Python 2 dist tag(s) after converting names to canonical format
#   Needs to first put all arguments into a list, because invoking a different
#   macro (%py_dist_name) overwrites them
%py2_dist() %{lua:\
        args = {}\
        arg = 1\
        while (true) do\
                name = rpm.expand("%{?" .. arg .. ":%{" .. arg .. "}}");\
                if (name == nil or name == '') then\
                        break\
                end\
                args[arg] = name\
                arg = arg + 1\
        end\
        for arg, name in ipairs(args) do\
                canonical = rpm.expand("%py_dist_name " .. name);\
                print("python2dist(" .. canonical .. ") ");\
        end\
}

# Creates Python 3 dist tag(s) after converting names to canonical format
#   Needs to first put all arguments into a list, because invoking a different
#   macro (%py_dist_name) overwrites them
%py3_dist() %{lua:\
        args = {}\
        arg = 1\
        while (true) do\
                name = rpm.expand("%{?" .. arg .. ":%{" .. arg .. "}}");\
                if (name == nil or name == '') then\
                        break\
                end\
                args[arg] = name\
                arg = arg + 1\
        end\
        for arg, name in ipairs(args) do\
                canonical = rpm.expand("%py_dist_name " .. name);\
                print("python3dist(" .. canonical .. ") ");\
        end\
}