Automatically call %python_provide

This allows us to drop the %python_provide macro from most spec files,
except where we want to use it for virtual provides or empty packages.

python-rpm-generators.spec

@@ -10,7 +10,8 @@ Url:            https://src.fedoraproject.org/python-rpm-generators
 Source0:        https://raw.githubusercontent.com/rpm-software-management/rpm/102eab50b3d0d6546dfe082eac0ade21e6b3dbf1/COPYING
 Source1:        python.attr
 Source2:        pythondist.attr
-Source3:        pythondistdeps.py
+Source3:        pythonname.attr
+Source4:        pythondistdeps.py
 
 BuildArch:      noarch
 
@@ -22,6 +23,8 @@ Summary:        %{summary}
 Requires:       python3-setuptools
 # We have parametric macro generators, we need RPM 4.16 (4.15.90+ is 4.16 alpha)
 Requires:       rpm > 4.15.90-0
+# We use %%python_provide
+Requires:       python-rpm-macros
 
 %description -n python3-rpm-generators
 %{summary}.
@@ -31,19 +34,21 @@ Requires:       rpm > 4.15.90-0
 cp -a %{sources} .
 
 %install
-install -Dpm0644 -t %{buildroot}%{_fileattrsdir} python.attr pythondist.attr
+install -Dpm0644 -t %{buildroot}%{_fileattrsdir} *.attr
 install -Dpm0755 -t %{buildroot}%{_rpmconfigdir} pythondistdeps.py
 
 %files -n python3-rpm-generators
 %license COPYING
 %{_fileattrsdir}/python.attr
 %{_fileattrsdir}/pythondist.attr
+%{_fileattrsdir}/pythonname.attr
 %{_rpmconfigdir}/pythondistdeps.py
 
 %changelog
 * Wed Apr 01 2020 Miro Hrončok <mhroncok@redhat.com> - 11-1
 - Rewrite python(abi) generators to Lua to make them faster
 - RPM 4.16+ is needed
+- Automatically call %%python_provide
 
 * Thu Jan 30 2020 Fedora Release Engineering <releng@fedoraproject.org> - 10-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild

pythonname.attr

@@ -0,0 +1,20 @@
+%__pythonname_provides() %{lua:
+    -- this macro is called for each file in a package, the path being in %1
+    -- but we don't need to know the path, so we would get for each file: Macro %1 defined but not used within scope
+    -- in here, we expand %name conditionally on %1 to suppress the warning
+    local name = rpm.expand('%{?1:%{name}}')
+    -- a structure that knows what names were already processed, so we can end early
+    if __pythonname_beenthere == nil then
+        __pythonname_beenthere = {}
+    end
+    -- we save ourselves a trip to %python_provide if we have already been there
+    if __pythonname_beenthere[name] == nil then
+        local python_provide = rpm.expand('%{?python_provide:%python_provide %{name}}')
+        for provides in python_provide:gmatch('Provides:[ \\t]+([^\\n]+)') do
+          print(provides .. " ")
+        end
+        __pythonname_beenthere[name] = true
+    end
+}
+
+%__pythonname_path ^/

tests/pythonname.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/bash -eux
+rpmbuild -ba pythonname.spec
+
+XY=$(rpm --eval '%python3_version_nodots')
+RPMDIR=$(rpm --eval '%_topdir')/RPMS/noarch
+
+echo "Provides for python${XY}-foo"
+rpm -qp --provides ${RPMDIR}/python${XY}-foo-0-0.noarch.rpm
+rpm -qp --provides ${RPMDIR}/python${XY}-foo-0-0.noarch.rpm | grep -q '^python-foo = 0-0$'
+rpm -qp --provides ${RPMDIR}/python${XY}-foo-0-0.noarch.rpm | grep -q '^python3-foo = 0-0$'
+
+echo "Provides for python3-foo"
+rpm -qp --provides ${RPMDIR}/python3-foo-0-0.noarch.rpm
+rpm -qp --provides ${RPMDIR}/python3-foo-0-0.noarch.rpm     | grep -q '^python-foo = 0-0$'
+rpm -qp --provides ${RPMDIR}/python3-foo-0-0.noarch.rpm     | grep -q '^python'${XY}'-foo = 0-0$'
+
+echo "Provides for python2-foo"
+rpm -qp --provides ${RPMDIR}/python2-foo-0-0.noarch.rpm
+rpm -qp --provides ${RPMDIR}/python2-foo-0-0.noarch.rpm     | grep -vq '^python-foo = 0-0$'
+
+echo "Provides for python-foo"
+rpm -qp --provides ${RPMDIR}/python-foo-0-0.noarch.rpm
+rpm -qp --provides ${RPMDIR}/python-foo-0-0.noarch.rpm      | grep -vq '^python2-foo = 0-0$'
+
+echo "Provides for python35-foo"
+rpm -qp --provides ${RPMDIR}/python35-foo-0-0.noarch.rpm
+rpm -qp --provides ${RPMDIR}/python35-foo-0-0.noarch.rpm    | grep -vq '^python-foo = 0-0$'
+rpm -qp --provides ${RPMDIR}/python35-foo-0-0.noarch.rpm    | grep -vq '^python3-foo = 0-0$'

tests/pythonname.spec

@@ -0,0 +1,62 @@
+Name:           pythonname
+Version:        0
+Release:        0
+Summary:        ...
+License:        MIT
+BuildArch:      noarch
+
+%description
+...
+
+%install
+touch %{buildroot}/something
+touch %{buildroot}/something_else
+touch %{buildroot}/something_completely_different
+
+
+%package -n python-foo
+Summary:        ...
+%description -n python-foo
+...
+%files -n python-foo
+/*
+
+
+%package -n python2-foo
+Summary:        ...
+%description -n python2-foo
+...
+%files -n python2-foo
+/*
+
+
+%package -n python3-foo
+Summary:        ...
+%description -n python3-foo
+...
+%files -n python3-foo
+/*
+
+
+%package -n python%{python3_version_nodots}-foo
+Summary:        ...
+%description -n python%{python3_version_nodots}-foo
+...
+%files -n python%{python3_version_nodots}-foo
+/*
+
+
+%package -n python35-foo
+Summary:        ...
+%description -n python35-foo
+...
+%files -n python35-foo
+/*
+
+
+%package -n ruby-foo
+Summary:        ...
+%description -n ruby-foo
+...
+%files -n ruby-foo
+/*

tests/tests.yml

@@ -16,6 +16,9 @@
     - pythonabi:
         dir: .
         run: ./pythonabi.sh
+    - pythonname:
+        dir: .
+        run: ./pythonname.sh
     required_packages:
     - rpm-build
     - python3-devel