php: add a custom PHP runner for tests

Since the default PHP test runner ignores a good number of environment
variables to potentially tampering the test suite execution, create a
custom php-for-tests.sh script which does nothing more than sourcing the
custom environment that our run-php-tests.sh outputs and running the
actual "php" executable (the one found by configure).

This fixes the loading of the guestfs_php.so module in the test suite,
as the libguestfs.so.0 library can be found by that module.

.gitignore

@@ -360,6 +360,7 @@ Makefile.in
 /php/extension/mkinstalldirs
 /php/extension/missing
 /php/extension/modules/
+/php/extension/php-for-tests.sh
 /php/extension/php_guestfs_php.h
 /php/extension/run-tests.php
 /php/extension/tmp-php.ini

configure.ac

@@ -1595,6 +1595,8 @@ AC_CONFIG_FILES([appliance/libguestfs-make-fixed-appliance],
                 [chmod +x,-w appliance/libguestfs-make-fixed-appliance])
 AC_CONFIG_FILES([inspector/test-xmllint.sh],
                 [chmod +x,-w inspector/test-xmllint.sh])
+AC_CONFIG_FILES([php/extension/php-for-tests.sh],
+                [chmod +x,-w php/extension/php-for-tests.sh])
 AC_CONFIG_FILES([pick-guests.pl],
                 [chmod +x,-w pick-guests.pl])
 AC_CONFIG_FILES([podwrapper.pl],

php/extension/php-for-tests.sh.in

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+. ./env
+@PHP@ $@

php/run-php-tests.sh

@@ -45,4 +45,4 @@ TESTS=$(echo guestfs_php_*.phpt)
 echo TESTS: $TESTS
 
 # PHP ignores the result of the tests!
-make test TESTS="$TESTS"
+make test TESTS="$TESTS" PHP_EXECUTABLE="$PWD/php-for-tests.sh"