Set PHP patch version automatically

Author: alcaeus

.evergreen/install-dependencies.sh

@@ -1,6 +1,33 @@
 #!/bin/sh
 set -o errexit  # Exit the script with error if any of the commands fail
 
+set_php_version ()
+{
+   PHP_VERSION=$1
+
+   if [ ! -d "/opt/php" ]; then
+      echo "PHP is not available"
+      exit 1
+   fi
+
+   if [ -d "/opt/php/${PHP_VERSION}-64bit/bin" ]; then
+      export PHP_PATH="/opt/php/${PHP_VERSION}-64bit/bin"
+   else
+      # Try to find the newest version matching our constant
+      ls -1 /opt/php
+      find /opt/php/ -maxdepth 1 -type d -name "${PHP_VERSION}*-64bit" -print
+      export PHP_PATH=`find /opt/php/ -maxdepth 1 -type d -name "${PHP_VERSION}*-64bit" -print | sort -V -r | head -1`/bin
+   fi
+
+   if [ ! -d "$PHP_PATH" ]; then
+      echo "Could not find PHP binaries for version ${PHP_VERSION}. Listing available versions..."
+      ls -1 /opt/php
+      exit 1
+   fi
+
+   export PATH=$PHP_PATH:$PATH
+}
+
 install_extension ()
 {
    # Workaround to get PECL running on PHP 7.0
@@ -100,10 +127,7 @@ case "$DEPENDENCIES" in
       ;;
 esac
 
-PHP_PATH=/opt/php/${PHP_VERSION}-64bit
-OLD_PATH=$PATH
-PATH=$PHP_PATH/bin:$OLD_PATH
-
+set_php_version $PHP_VERSION
 install_extension
 install_composer
 

.evergreen/run-tests.sh

@@ -37,9 +37,6 @@ OS=$(uname -s | tr '[:upper:]' '[:lower:]')
 
 echo "Running tests with $AUTH and $SSL, connecting to: $MONGODB_URI"
 
-OLD_PATH=$PATH
-PATH=/opt/php/${PHP_VERSION}-64bit/bin:$OLD_PATH
-
 # Disable failing PHPUnit due to deprecations
 export SYMFONY_DEPRECATIONS_HELPER=999999