From 1edf1295e8326ad315d24decea297d9f8ce22419 Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <zmike@samsung.com>
Date: Wed, 8 Aug 2018 09:38:24 -0400
Subject: [PATCH] ci: automatically clear config.cache if it cannot be used

Summary:
if env vars change between runs then the cache is invalidated, causing
configure to print a very specific error

by running a separate script to catch this error, the build can detect
and clear the cache when necessary to avoid having to manually disable
the cache when changing build settings
Depends on D6697

Reviewers: stefan_schmidt, bu5hm4n

Reviewed By: bu5hm4n

Subscribers: bu5hm4n, cedric, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D6732
---
 .ci/ci-configure.sh |  4 ++--
 .ci/configure.sh    | 12 ++++++++++++
 .travis.yml         |  5 +++++
 3 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100755 .ci/configure.sh

diff --git a/.ci/ci-configure.sh b/.ci/ci-configure.sh
index 2f3eb18628..2fea243276 100755
--- a/.ci/ci-configure.sh
+++ b/.ci/ci-configure.sh
@@ -57,7 +57,7 @@ if [ "$DISTRO" != "" ] ; then
   travis_fold configure "configure $OPTS"
   docker exec --env MAKEFLAGS="-j5 -rR" --env EIO_MONITOR_POLL=1 --env CC="ccache gcc" \
     --env CXX="ccache g++" --env CFLAGS="-fdirectives-only" --env CXXFLAGS="-fdirectives-only" \
-    --env LD="ld.gold" $(cat $HOME/cid) sh -c "./configure $OPTS || cat config.log"
+    --env LD="ld.gold" $(cat $HOME/cid) sh -c ".ci/configure.sh $OPTS"
   travis_endfold configure
 else
   OSX_COPTS="--disable-cxx-bindings --with-tests=regular --disable-dependency-tracking -C"
@@ -78,6 +78,6 @@ else
   autoreconf -iv
   travis_endfold autoreconf
   travis_fold configure "configure $OSX_COPTS"
-  ./configure $OSX_COPTS || cat config.log
+  .ci/configure.sh $OSX_COPTS
   travis_endfold configure
 fi
diff --git a/.ci/configure.sh b/.ci/configure.sh
new file mode 100755
index 0000000000..fc2b231081
--- /dev/null
+++ b/.ci/configure.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+
+set -o pipefail
+export TEST_VAR=1
+if ! ./configure $@ | tee -a configlog ; then
+  if grep -q 'configure: error: changes in the environment can compromise the build' configlog ; then
+    echo "clearing config.cache and retrying..."
+    rm -f configlog config.cache
+    ./configure $@
+  fi
+fi
diff --git a/.travis.yml b/.travis.yml
index 4594f39011..1990eb7c2a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -84,6 +84,11 @@ before_script:
       fi
 
   - .ci/ci-ccache-stats.sh
+  - |
+       if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+         cp $HOME/cachedir/config.cache . || true
+       fi
+
 
 script:
   - .ci/ci-configure.sh "$CI_BUILD_TYPE"