use maturin when possible; simplify setuptools_rust patch

Remove-unstable-simd-feature.patch

@@ -1,4 +1,4 @@
-From e9f52399252765535db5ed946b00c9ce0be11964 Mon Sep 17 00:00:00 2001
+From 8cb9c84fadfc490ec88665f0ab4871c2d7255738 Mon Sep 17 00:00:00 2001
 From: Maxwell G <gotmax@e.email>
 Date: Wed, 25 Jan 2023 20:30:13 -0600
 Subject: [PATCH] Remove unstable-simd feature
@@ -9,7 +9,7 @@ This feature requires nightly Rust.
  1 file changed, 6 deletions(-)
 
 diff --git a/Cargo.toml b/Cargo.toml
-index 8c7a50b..1a7a300 100644
+index fbd45a4..09724ce 100644
 --- a/Cargo.toml
 +++ b/Cargo.toml
 @@ -32,12 +32,6 @@ crate-type = ["cdylib"]

Use-setuptools-rust-instead-of-maturin.patch

@@ -1,4 +1,4 @@
-From 9aa0036fa5c5bbcc346ab54b100ced22460d0672 Mon Sep 17 00:00:00 2001
+From 37abb055e3435406156c6e4462b2a58923c9f11a Mon Sep 17 00:00:00 2001
 From: Maxwell G <gotmax@e.email>
 Date: Wed, 25 Jan 2023 13:47:35 -0600
 Subject: [PATCH] Use setuptools-rust instead of maturin
@@ -9,48 +9,72 @@ This requires setutpools >= 61.0 which is available on F37+. The
 metadata in the [project] table can be translated to a setup.cfg or
 added to setup.py for greater compatibility.
 ---
- pyproject.toml | 6 +++---
- setup.py       | 9 +++++++++
- 2 files changed, 12 insertions(+), 3 deletions(-)
+ pyproject.toml |  9 ++++++---
+ setup.py       | 28 ++++++++++++++++++++++++++++
+ 2 files changed, 34 insertions(+), 3 deletions(-)
  create mode 100644 setup.py
 
 diff --git a/pyproject.toml b/pyproject.toml
-index 8372fc8..9f07b95 100644
+index 8372fc8..1e48b88 100644
 --- a/pyproject.toml
 +++ b/pyproject.toml
-@@ -1,6 +1,6 @@
+@@ -1,6 +1,5 @@
  [project]
  name = "orjson"
 -repository = "https://github.com/ijl/orjson"
-+version = "@@VERSION@@"
  requires-python = ">=3.7"
  classifiers = [
      "Development Status :: 5 - Production/Stable",
-@@ -24,8 +24,8 @@ classifiers = [
+@@ -22,10 +21,14 @@ classifiers = [
+     "Programming Language :: Rust",
+     "Typing :: Typed",
  ]
++dynamic = [
++    # version is dynamically defined in setup.py
++    "version",
++]
  
  [build-system]
 -build-backend = "maturin"
 -requires = ["maturin>=0.13,<2"]
 +build-backend = "setuptools.build_meta"
-+requires = ["setuptools>=61.0", "setuptools-rust"]
++requires = ["setuptools>=61.0", "setuptools-rust", "tomli; python_version<'3.11'"]
  
  [tool.maturin]
  python-source = "pysrc"
 diff --git a/setup.py b/setup.py
 new file mode 100644
-index 0000000..fb5a727
+index 0000000..63f263d
 --- /dev/null
 +++ b/setup.py
-@@ -0,0 +1,9 @@
+@@ -0,0 +1,28 @@
++import sys
++from pathlib import Path
++
++if sys.version_info[:2] >= (3, 11):
++    import tomllib
++else:
++    import tomli as tomllib
++
 +from setuptools import setup
-+from setuptools_rust import RustExtension, Binding
++from setuptools_rust import Binding, RustExtension
++
++HERE = Path(__file__).resolve().parent
++
++with (HERE / "Cargo.toml").open("rb") as fp:
++    DATA = tomllib.load(fp)["package"]
 +
 +setup(
++    # Can be removed once we no longer need a minimal build for setuptools < 61.
++    # This is duplicated in pyproject.toml's [project] table
++    name="orjson",
++    packages=["orjson"],
++    #
 +    rust_extensions=[
 +        RustExtension("orjson.orjson", binding=Binding.NoBinding, args=["--offline"])
 +    ],
 +    package_dir={"": "pysrc"},
++    version=DATA["version"],
 +)
 -- 
 2.40.1

python-orjson.spec

@@ -3,7 +3,10 @@
 # Copyright (c) 2023 Maxwell G <maxwell@gtmx.me>
 # Copyright (c) Fedora Project Authors
 
+# Specfile compatability: EPEL >= 9 or Fedora >= 37 and RPM >= 4.16
+
 %bcond tests 1
+%bcond maturin %[ 0%{?fedora} >= 39 ]
 
 Name:           python-orjson
 Version:        3.8.12
@@ -14,10 +17,12 @@ License:        Apache-2.0 OR MIT
 URL:            https://github.com/ijl/orjson
 Source:         %{pypi_source orjson}
 # Ineligble for upstreaming
-Patch:          Use-setuptools-rust-instead-of-maturin.patch
-# Ineligble for upstreaming
 Patch:          Remove-unstable-simd-feature.patch
 
+# Ineligble for upstreaming
+# Used when maturin bcond is disabled
+Patch5000:      Use-setuptools-rust-instead-of-maturin.patch
+
 BuildRequires:  python3-devel
 BuildRequires:  rust-packaging
 
@@ -63,24 +68,9 @@ License:        (Apache-2.0 OR MIT) AND (Apache-2.0 OR BSL-1.0) AND BSD-3-Clause
 
 
 %prep
-%autosetup -p1 -n orjson-%{version}
-
-# Replaces @@VERSION@@ placeholder in pyproject.toml with the value of %%version.
-%writevars -f pyproject.toml version
-
-%if 0%{?fedora} && 0%{?fedora} <= 36
-# Minimal setup.cfg for Fedora 36's old setuptools that doesn't support PEP 621
-# (i.e. it doesn't understand metadata in pyproject.toml's [project] table)
-cat <<EOF > setup.cfg
-[metadata]
-name = orjson
-version = %{version}
-
-[options]
-packages = orjson
-EOF
-sed -i 's|setuptools>=61.0|setuptools|' pyproject.toml
-%endif
+%autosetup -p1 -n orjson-%{version} -N
+%autopatch -M 4999
+%{!?with_maturin:%autopatch -m5000 -M5000 -p1}
 
 # Remove bundled yyjson.
 rm -rv include/yyjson/
@@ -120,6 +110,7 @@ export RUSTFLAGS='%{build_rustflags}'
 %changelog
 * Thu May 18 2023 Maxwell G <maxwell@gtmx.me> - 3.8.12-1
 - Update to 3.8.12.
+- Use maturin as a build system when available
 
 * Fri May 5 2023 Maxwell G <maxwell@gtmx.me> - 3.8.11-1
 - Update to 3.8.11. Fixes rhbz#2193468.