upgpkg: libgraphqlparser 0.7.0-3

Replace build dependency: python2 with python3.

libgraphqlparser/PKGBUILD

@@ -2,15 +2,30 @@
 
 pkgname=libgraphqlparser
 pkgver=0.7.0
-pkgrel=2
+pkgrel=3
 pkgdesc="A GraphQL query parser in C++ with C and C++ APIs"
 arch=('x86_64')
 url="https://github.com/graphql/libgraphqlparser"
 license=('BSD')
 depends=('gcc-libs')
-makedepends=('git' 'cmake' 'python2')
-source=("$pkgname-$pkgver.tar.gz::https://github.com/graphql/$pkgname/archive/v$pkgver.tar.gz")
-sha512sums=('973292b164d0d2cfe453a2f01559dbdb1b9d22b6304f6a3aabf71e2c0a3e24ab69dfd72a086764ad5befecf0005620f8e86f552dacc324f9615a05f31de7cede')
+makedepends=('git' 'cmake' 'python')
+source=(
+  "$pkgname-$pkgver.tar.gz::https://github.com/graphql/$pkgname/archive/v$pkgver.tar.gz"
+  'use_python3.patch'
+)
+sha512sums=('973292b164d0d2cfe453a2f01559dbdb1b9d22b6304f6a3aabf71e2c0a3e24ab69dfd72a086764ad5befecf0005620f8e86f552dacc324f9615a05f31de7cede'
+            'bf20aad5ce3708aed8508c999b03f24ea1f63c281d95a4e1d5683f85309eadca3c2caa9f2ef43cedf0d849c571b853adf05de2ded30a8fa306fd544dde6a4c40')
+
+prepare() {
+  cd "$pkgname-$pkgver"
+
+  # Python 2 is super *super* _super_ EOL.
+  patch -p1 -i ../use_python3.patch
+  2to3 \
+    --write \
+    --nobackups \
+    ast
+}
 
 build() {
   cd "$pkgname-$pkgver"

libgraphqlparser/use_python3.patch

@@ -0,0 +1,14 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -7,10 +7,7 @@ INCLUDE(version)
+ 
+ SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
+ 
+-FIND_PACKAGE(PythonInterp 2 REQUIRED)
+-IF (NOT PYTHON_VERSION_MAJOR EQUAL 2)
+-  MESSAGE(FATAL_ERROR "Python 2 is required.")
+-ENDIF()
++FIND_PACKAGE(PythonInterp 3 REQUIRED)
+ 
+ FIND_PROGRAM(CTYPESGEN_FOUND ctypesgen.py)
+