Drop use of setuptools

Since we moved to poetry and no code using setuptools anymore,
this requirement can be dropped. The commit also updates the
plugin documentation which was still based on setup.py

Author: schaefi

doc/source/contributing/kiwi_plugin_architecture.rst

@@ -24,44 +24,51 @@ Task plugin class
   implementation of the :file:`process` method.
 
 Task plugin entry point
-  Registration of the plugin must be done in :file:`setup.py`
-  using the ``entry_points`` concept from Python's setuptools.
+  Registration of the plugin must be done in :file:`pyproject.toml`
+  using the ``tool.poetry.plugins`` concept.
 
   .. code:: python
 
-      'packages': ['kiwi_plugin'],
-      'entry_points': {
-          'kiwi.tasks': [
-              'service_command=kiwi_plugin.tasks.service_command'
-          ]
-      }
+      [tool.poetry]
+      name = "kiwi_plugin"
+
+      packages = [
+          { include = "kiwi_plugin"},
+      ]
+
+      [tool.poetry.plugins]
+      [tool.poetry.plugins."kiwi.tasks"]
+      service_command = "kiwi_plugin.tasks.service_command"
 
 Example plugin
 --------------
 
 .. note::
 
    The following example assumes an existing Python project
-   which was set up according to the Python project rules
-   and standards.
+   which was set up using poetry and pyproject.toml.
 
 1. Assuming the project namespace is **kiwi_relax_plugin**, create the task
    plugin directory :file:`kiwi_relax_plugin/tasks`
 
-2. Create the entry point in :command:`setup.py`.
+2. Create the entry point in :command:`pyproject.toml`.
 
    Assuming we want to create the service named **relax** that has
-   the command **justdoit**, this is the following entry point
-   definition in :file:`setup.py`:
+   the command **justdoit**, this is the required plugin
+   definition in :file:`pyproject.toml`:
 
    .. code:: python
 
-      'packages': ['kiwi_relax_plugin'],
-      'entry_points': {
-          'kiwi.tasks': [
-              'relax_justdoit=kiwi_relax_plugin.tasks.relax_justdoit'
-          ]
-      }
+      [tool.poetry]
+      name = "kiwi_relax_plugin"
+
+      packages = [
+          { include = "kiwi_relax_plugin"},
+      ]
+
+      [tool.poetry.plugins]
+      [tool.poetry.plugins."kiwi.tasks"]
+      relax_justdoit = "kiwi_relax_plugin.tasks.relax_justdoit"
 
 3. Create the plugin code in the file
    :file:`kiwi_relax_plugin/tasks/relax_justdoit.py` with the following
@@ -106,5 +113,4 @@ Example plugin
 
    .. code:: bash
 
-       $ ./setup.py develop
-       $ kiwi-ng relax justdoit --now
+       $ poetry run kiwi-ng relax justdoit --now

package/python-kiwi-pkgbuild-template

@@ -8,7 +8,7 @@ pkgrel=0
 pkgdesc="KIWI - Appliance Builder Next Generation"
 url="https://github.com/SUSE/kiwi/tarball/master"
 license=('GPL3')
-makedepends=(make gcc python-build python-docopt python-installer python-lxml python-poetry-core python-requests python-setuptools python-simplejson python-sphinx python-sphinx_rtd_theme python-wheel python-yaml shadow grep)
+makedepends=(make gcc python-build python-docopt python-installer python-lxml python-poetry-core python-requests python-simplejson python-sphinx python-sphinx_rtd_theme python-wheel python-yaml shadow grep)
 provides=(kiwi-ng kiwi)
 source=("${pkgname}.tar.gz")
 changelog="${pkgname}.changes"
@@ -27,7 +27,7 @@ build() {
 }
 
 package_python-kiwi(){
-  depends=(python-docopt python-simplejson python-lxml python-requests python-setuptools python-yaml grub qemu squashfs-tools gptfdisk pacman e2fsprogs xfsprogs btrfs-progs libisoburn lvm2 mtools parted multipath-tools rsync tar shadow screen kiwi-man-pages)
+  depends=(python-docopt python-simplejson python-lxml python-requests python-yaml grub qemu squashfs-tools gptfdisk pacman e2fsprogs xfsprogs btrfs-progs libisoburn lvm2 mtools parted multipath-tools rsync tar shadow screen kiwi-man-pages)
   optdepends=('gnupg: keyring creation for APT package manager')
   cd kiwi-${pkgver}
   python3 -m installer --destdir "${pkgdir}/" dist/*.whl

package/python-kiwi-spec-template

@@ -98,7 +98,6 @@ BuildRequires:  python%{python3_pkgversion}-docopt-ng
 %endif
 BuildRequires:  python%{python3_pkgversion}-lxml
 BuildRequires:  python%{python3_pkgversion}-requests
-BuildRequires:  python%{python3_pkgversion}-setuptools
 BuildRequires:  python%{python3_pkgversion}-simplejson
 %if 0%{?suse_version}
 BuildRequires:  python%{python3_pkgversion}-Sphinx
@@ -445,7 +444,6 @@ Requires:       python%{python3_pkgversion}-docopt-ng
 %endif
 Requires:       python%{python3_pkgversion}-lxml
 Requires:       python%{python3_pkgversion}-requests
-Requires:       python%{python3_pkgversion}-setuptools
 Requires:       python%{python3_pkgversion}-xmltodict
 %if ! (0%{?rhel} && 0%{?rhel} < 8)
 Recommends:     kiwi-man-pages

pyproject.toml

@@ -55,7 +55,6 @@ docopt-ng = ">=0.9.0"
 lxml = ">=4.6.0"
 requests = ">=2.25.0"
 PyYAML = ">=5.4.0"
-setuptools = ">=50"
 simplejson = ">=3.17.0"
 
 # Optional dependencies for markup extra