Add envvar that will be present during RPM build

Part of a Fedora Change for F28: "Avoid /usr/bin/python in RPM build"
https://fedoraproject.org/wiki/Changes/Avoid_usr_bin_python_in_RPM_Build

rpm-4.14.1-Add-envvar-that-will-be-present-during-RPM-build.patch

@@ -0,0 +1,28 @@
+From bf636421120aa2c97f9e0fdcee3c211b4241bd86 Mon Sep 17 00:00:00 2001
+From: Tomas Orsava <torsava@redhat.com>
+Date: Mon, 29 Jan 2018 16:13:18 +0100
+Subject: [PATCH] Add envvar that will be present during RPM build
+
+Part of a Fedora Change for F28:
+"Avoid /usr/bin/python in RPM build"
+https://fedoraproject.org/wiki/Changes/Avoid_usr_bin_python_in_RPM_Build
+---
+ macros.in | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/macros.in b/macros.in
+index dd6ef67..68449e3 100644
+--- a/macros.in
++++ b/macros.in
+@@ -804,6 +804,8 @@ package or when debugging this package.\
+   export PKG_CONFIG_PATH\
+   CONFIG_SITE=${CONFIG_SITE:-NONE}\
+   export CONFIG_SITE\
++  PYTHON_DISALLOW_AMBIGUOUS_VERSION=warn\
++  export PYTHON_DISALLOW_AMBIGUOUS_VERSION\
+   \
+   %{verbose:set -x}%{!verbose:exec > /dev/null}\
+   umask 022\
+-- 
+2.13.6
+

rpm.spec

@@ -23,7 +23,7 @@
 
 %global rpmver 4.14.1
 #global snapver rc2
-%global rel 4
+%global rel 5
 
 %global srcver %{version}%{?snapver:-%{snapver}}
 %global srcdir %{?snapver:testing}%{!?snapver:%{name}-%(echo %{version} | cut -d'.' -f1-2).x}
@@ -60,6 +60,13 @@ Patch5: rpm-4.12.0-rpm2cpio-hack.patch
 # Upstream pull request: https://github.com/rpm-software-management/rpm/pull/383
 Patch6: rpm-4.14.1-python-brp-bytecompile.patch
 
+# Downstream-only patch:
+# Add envvar that will be present during RPM build
+# - Part of a Fedora Change for F28:
+# - "Avoid /usr/bin/python in RPM build"
+# - https://fedoraproject.org/wiki/Changes/Avoid_usr_bin_python_in_RPM_Build
+Patch6: rpm-4.14.1-Add-envvar-that-will-be-present-during-RPM-build.patch
+
 # Patches already upstream:
 
 # These are not yet upstream
@@ -578,6 +585,11 @@ make check || cat tests/rpmtests.log
 %doc doc/librpm/html/*
 
 %changelog
+* Tue Jan 30 2018 Tomas Orsava <torsava@redhat.com> - 4.14.1-4
+- Add envvar that will be present during RPM build,
+  Part of a Fedora Change for F28: "Avoid /usr/bin/python in RPM build"
+  https://fedoraproject.org/wiki/Changes/Avoid_usr_bin_python_in_RPM_Build
+
 * Tue Jan 30 2018 Petr Viktorin <pviktori@redhat.com> - 4.14.1-4
 - Skip automatic Python byte-compilation if *.py files are not present