Try using pep518 to install the protobuf build dependency (onnx#782)

smessmer · bddppq · commit 3b27cc8faa80 · 2018-04-19T12:25:01.000-07:00
diff --git a/.travis/before_install.sh b/.travis/before_install.sh
@@ -49,4 +49,4 @@ pip install -U pip setuptools
 
 pip list --outdated --format=freeze | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 pip install -U
 
-pip install pytest-cov nbval protobuf
+pip install pytest-cov nbval
diff --git a/pyproject.toml b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+# Minimum requirements for the build system to execute.
+requires = ["setuptools", "wheel", "protobuf"]

Original file line number	Diff line number	Diff line change
`@@ -49,4 +49,4 @@ pip install -U pip setuptools`
`49`	`49`
`50`	`50`	`pip list --outdated --format=freeze \| grep -v '^\-e' \| cut -d = -f 1 \| xargs -n1 pip install -U`
`51`	`51`
`52`		`-pip install pytest-cov nbval protobuf`
	`52`	`+pip install pytest-cov nbval`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+[build-system]`
	`2`	`+# Minimum requirements for the build system to execute.`
	`3`	`+requires = ["setuptools", "wheel", "protobuf"]`