Handle tox provision (tox.requires / tox.minversion)

Related: rhbz#1950291

README.md

@@ -111,6 +111,11 @@ Use `%{default_toxenv}` to get the default value.
 
 The `-t`/`-e` option uses [tox-current-env]'s `--print-deps-to-file` behind the scenes.
 
+If your package specifies some tox plugins in `tox.requires`,
+such plugins will be BuildRequired as well.
+Not all plugins are guaranteed to play well with [tox-current-env],
+in worst case, patch/sed the requirement out from the tox configuration.
+
 Note that both `-x` and `-t` imply `-r`,
 because runtime dependencies are always required for testing.
 

pyproject-rpm-macros.spec

@@ -12,7 +12,7 @@ License:        MIT
 # In other cases, such as backports, increment the point
 # release.
 Version:        0
-Release:        39.1%{?dist}
+Release:        39.2%{?dist}
 
 # Macro files
 Source001:      macros.pyproject
@@ -48,7 +48,7 @@ BuildRequires: python3dist(packaging)
 BuildRequires: python3dist(pip)
 BuildRequires: python3dist(setuptools)
 BuildRequires: python3dist(toml)
-BuildRequires: python3dist(tox-current-env) >= 0.0.3
+BuildRequires: python3dist(tox-current-env) >= 0.0.6
 BuildRequires: python3dist(wheel)
 %endif
 
@@ -110,6 +110,9 @@ export HOSTNAME="rpmbuild"  # to speedup tox in network-less mock, see rhbz#1856
 %license LICENSE
 
 %changelog
+* Thu Apr 22 2021 Miro Hrončok <mhroncok@redhat.com> - 0-39.2
+- Handle tox provision (tox.requires / tox.minversion)
+
 * Fri Apr 16 2021 Mohan Boddu <mboddu@redhat.com> - 0-39.1
 - Rebuilt for RHEL 9 BETA on Apr 15th 2021. Related: rhbz#1947937
 

pyproject_buildrequires.py

@@ -6,6 +6,7 @@ import functools
 import traceback
 import contextlib
 from io import StringIO
+import json
 import subprocess
 import re
 import tempfile
@@ -248,13 +249,16 @@ def parse_tox_requires_lines(lines):
 
 def generate_tox_requirements(toxenv, requirements):
     toxenv = ','.join(toxenv)
-    requirements.add('tox-current-env >= 0.0.3', source='tox itself')
+    requirements.add('tox-current-env >= 0.0.6', source='tox itself')
     requirements.check(source='tox itself')
-    with tempfile.NamedTemporaryFile('r') as deps, tempfile.NamedTemporaryFile('r') as extras:
+    with tempfile.NamedTemporaryFile('r') as deps, \
+        tempfile.NamedTemporaryFile('r') as extras, \
+            tempfile.NamedTemporaryFile('r') as provision:
         r = subprocess.run(
             [sys.executable, '-m', 'tox',
              '--print-deps-to', deps.name,
              '--print-extras-to', extras.name,
+             '--no-provision', provision.name,
              '-qre', toxenv],
             check=False,
             encoding='utf-8',
@@ -263,7 +267,22 @@ def generate_tox_requirements(toxenv, requirements):
         )
         if r.stdout:
             print_err(r.stdout, end='')
-        r.check_returncode()
+
+        provision_content = provision.read()
+        if provision_content and r.returncode != 0:
+            provision_requires = json.loads(provision_content)
+            if 'minversion' in provision_requires:
+                requirements.add(f'tox >= {provision_requires["minversion"]}',
+                                 source='tox provision (minversion)')
+            if 'requires' in provision_requires:
+                requirements.extend(provision_requires["requires"],
+                                    source='tox provision (requires)')
+            requirements.check(source='tox provision')  # this terminates the script
+            raise RuntimeError(
+                'Dependencies requested by tox provisioning appear installed, '
+                'but tox disagreed.')
+        else:
+            r.check_returncode()
 
         deplines = deps.read().splitlines()
         packages = parse_tox_requires_lines(deplines)

pyproject_buildrequires_testcases.yaml

@@ -290,7 +290,7 @@ Tox dependencies:
     setuptools: 50
     wheel: 1
     tox: 3.5.3
-    tox-current-env: 0.0.3
+    tox-current-env: 0.0.6
   toxenv:
     - py3
   setup.py: |
@@ -313,7 +313,7 @@ Tox dependencies:
     python3dist(setuptools) >= 40.8
     python3dist(wheel)
     python3dist(wheel)
-    python3dist(tox-current-env) >= 0.0.3
+    python3dist(tox-current-env) >= 0.0.6
     python3dist(toxdep1)
     python3dist(toxdep2)
     python3dist(inst)
@@ -324,7 +324,7 @@ Tox extras:
     setuptools: 50
     wheel: 1
     tox: 3.5.3
-    tox-current-env: 0.0.3
+    tox-current-env: 0.0.6
   toxenv:
     - py3
   setup.py: |
@@ -354,7 +354,7 @@ Tox extras:
     python3dist(setuptools) >= 40.8
     python3dist(wheel)
     python3dist(wheel)
-    python3dist(tox-current-env) >= 0.0.3
+    python3dist(tox-current-env) >= 0.0.6
     python3dist(toxdep)
     python3dist(inst)
     python3dist(dep11) > 11
@@ -363,3 +363,74 @@ Tox extras:
     python3dist(dep22)
     python3dist(dep23)
   result: 0
+
+Tox provision unsatisfied:
+  installed:
+    setuptools: 50
+    wheel: 1
+    tox: 3.5.3
+    tox-current-env: 0.0.6
+  toxenv:
+    - py3
+  setup.py: |
+    from setuptools import setup
+    setup(
+        name='test',
+        version='0.1',
+        install_requires=['inst'],
+    )
+  tox.ini: |
+    [tox]
+    minversion = 3.999
+    requires =
+        setuptools > 40
+        wheel > 2
+    [testenv]
+    deps =
+        toxdep1
+        toxdep2
+  expected: |
+    python3dist(setuptools) >= 40.8
+    python3dist(wheel)
+    python3dist(wheel)
+    python3dist(tox-current-env) >= 0.0.6
+    python3dist(tox) >= 3.999
+    python3dist(setuptools) > 40
+    python3dist(wheel) > 2
+  result: 0
+
+Tox provision satisfied:
+  installed:
+    setuptools: 50
+    wheel: 1
+    tox: 3.5.3
+    tox-current-env: 0.0.6
+  toxenv:
+    - py3
+  setup.py: |
+    from setuptools import setup
+    setup(
+        name='test',
+        version='0.1',
+        install_requires=['inst'],
+    )
+  tox.ini: |
+    [tox]
+    minversion = 3.5
+    requires =
+        setuptools > 40
+    [testenv]
+    deps =
+        toxdep1
+        toxdep2
+  expected: |
+    python3dist(setuptools) >= 40.8
+    python3dist(wheel)
+    python3dist(wheel)
+    python3dist(tox-current-env) >= 0.0.6
+    python3dist(tox) >= 3.5
+    python3dist(setuptools) > 40
+    python3dist(toxdep1)
+    python3dist(toxdep2)
+    python3dist(inst)
+  result: 0