[Travis] Fixed memory issues during build (#2869)

* [Travis] Reduced Composer memory usage.

* [Travis] Enabled swap for Behat tests.

Co-Authored-By: Andrew Longosz <alongosz@users.noreply.github.com>

.travis.yml

@@ -31,7 +31,7 @@ env:
     # In order to specify extra flags like ignoring platform reqs, using only stable packages and so on-
     - COMPOSER_FLAGS=""
     # By default test with Symfony 2.8, some test are done against 3.4 for forward compat testing.
-    - SYMFONY_VERSION="~2.8.51"
+    - SYMFONY_VERSION="~2.8.52"
 
 matrix:
   fast_finish: true
@@ -42,7 +42,7 @@ matrix:
     - php: 5.6
       env: TEST_CONFIG="phpunit-integration-legacy.xml" DB="postgresql" DATABASE="pgsql://postgres@localhost/testdb"
     - php: 5.6
-      env: BEHAT_OPTS="--profile=core --tags=~@broken" RUN_INSTALL=1 SYMFONY_ENV=behat SYMFONY_DEBUG=1
+      env: BEHAT_OPTS="--profile=core --tags=~@broken" RUN_INSTALL=1 SYMFONY_ENV=behat SYMFONY_DEBUG=1 COMPOSER_MEMORY_LIMIT=-1
 # 7.0
     - php: 7.0
       env: REST_TEST_CONFIG="phpunit-functional-rest.xml" RUN_INSTALL=1 SYMFONY_ENV=dev SYMFONY_DEBUG=1
@@ -55,7 +55,7 @@ matrix:
       env: TEST_CONFIG="phpunit-integration-legacy.xml" DB="mysql" DATABASE="mysql://root@localhost/testdb" CUSTOM_CACHE_POOL="singleredis" REDIS_ENABLE_LZF="true" REDIS_ENABLE_IGBINARY="true" SYMFONY_VERSION="~3.4.26"
 # 7.2
     - php: 7.2
-      env: TEST_CONFIG="phpunit.xml" SYMFONY_VERSION="~3.4.26"
+      env: TEST_CONFIG="phpunit.xml" SYMFONY_VERSION="~3.4.34"
 # 7.3
     - php: 7.3
       env: TEST_CONFIG="phpunit.xml"
@@ -82,6 +82,7 @@ before_install:
   - if [ "$REDIS_ENABLE_LZF" = true ] ; then printf "no\n" | pecl install lzf ; fi
   # Prepare system
   - if [ "$TEST_CONFIG" != "" ] ; then ./bin/.travis/prepare_unittest.sh ; fi
+  - if [ "$BEHAT_OPTS" != "" ] ; then ./bin/.travis/enable_swap.sh ; fi
   - if [ "$BEHAT_OPTS" != "" ] ; then ./bin/.travis/prepare_behat.sh ; fi
   - if [ "$REST_TEST_CONFIG" != "" ] ; then ./bin/.travis/prepare_behat.sh ; fi
   # Detecting timezone issues by testing on random timezone

bin/.travis/enable_swap.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+echo '> Enabling swap...'
+sudo /bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=4096
+sudo /sbin/mkswap /var/swap.1
+sudo /sbin/swapon /var/swap.1

bin/.travis/prepare_behat.sh

@@ -8,6 +8,7 @@ export BRANCH_BUILD_DIR=$TRAVIS_BUILD_DIR TRAVIS_BUILD_DIR="$HOME/build/ezplatfo
 
 # Checkout meta repo, use the branch indicated in composer.json under extra._ezplatform_branch_for_behat_tests
 EZPLATFORM_BRANCH=`php -r 'echo json_decode(file_get_contents("./composer.json"))->extra->_ezplatform_branch_for_behat_tests;'`
+BRANCH_ALIAS=`php -r "echo json_decode(file_get_contents('./composer.json'))->extra->{'branch-alias'}->{'dev-tmp_ci_branch'};"`
 
 cd "$HOME/build"
 
@@ -24,4 +25,4 @@ cd ezplatform
 #fi
 
 # Install everything needed for behat testing, using our local branch of this repo
-./bin/.travis/trusty/setup_from_external_repo.sh $BRANCH_BUILD_DIR "ezsystems/ezpublish-kernel:dev-tmp_ci_branch"
+./bin/.travis/trusty/setup_from_external_repo.sh $BRANCH_BUILD_DIR "ezsystems/ezpublish-kernel:dev-tmp_ci_branch as ${BRANCH_ALIAS}"

composer.json

@@ -17,7 +17,7 @@
         "ext-SPL": "*",
         "ext-xsl": "*",
         "zetacomponents/mail": "^1.8.3",
-        "symfony/symfony": "^2.8.51 | ^3.4.26",
+        "symfony/symfony": "^2.8.52 | ^3.4.34",
         "symfony-cmf/routing": "~1.4",
         "qafoo/rmf": "1.0.*",
         "kriswallsmith/buzz": "~0.16.1",