build: Create tox environments using a known Cython version (msgpack#408)

moreati · web-flow · commit 02e1f7623cd8 · 2021-01-27T10:11:32.000+09:00
This change causes Tox to run the project's setup.py in a virtualenv
(default path is .tox/.package). The required version of Cython is
installed, rather than whatever version is installed system wide.
diff --git a/pyproject.toml b/pyproject.toml
@@ -0,0 +1,8 @@
+[build-system]
+requires = [
+    # Also declared in requirements.txt, if updating here please also update
+    # there
+    "Cython~=0.29.13",
+    "setuptools >= 35.0.2",
+]
+build-backend = "setuptools.build_meta"
diff --git a/requirements.txt b/requirements.txt
@@ -1 +1,2 @@
+# Also declared in pyproject.toml, if updating here please also update there
 Cython~=0.29.13
diff --git a/tox.ini b/tox.ini
@@ -5,6 +5,7 @@ envlist =
     {pypy,pypy3}-pure,
     py27-x86,
     py34-x86,
+isolated_build = true
 
 [variants:pure]
 setenv=

Original file line number	Diff line number	Diff line change
`@@ -1 +1,2 @@`
	`1`	`+# Also declared in pyproject.toml, if updating here please also update there`
`1`	`2`	`Cython~=0.29.13`