Write an apache configuration file to /var/lib/eselect-php/mod_php.conf.

With the mod_php.so symlinking done, we realize a new problem: each
apache module has its "module name" hardcoded into the binary. For
example, in mod_php7.c, we find,

  AP_MODULE_DECLARE_DATA module php7_module

and likewise with php5_module in the 5.x series of PHP. This means
that we can't load both of these modules with one LoadModule statement
regardless of its filename -- we need to know the module name too.

This commit adds a function to write out an apache config file for the
current active module. The main apache config file should Include this
file, which will be updated whenever an apache2 target is set.

1 files changed, 36 insertions, 3 deletions

diff --git a/src/php.eselect.in b/src/php.eselect.in
index ea8676f..aa8ad68 100644
--- a/src/php.eselect.in
+++ b/src/php.eselect.in
@@ -208,6 +208,37 @@ get_active_apache2() {
 	fi
 }
 
+# Write an apache configuration file to load the active version of
+# mod_php. The 5.x and 7.x series (at least...) have different module
+# names, and so require a different apache configuration when
+# switching between the two.
+#
+# INPUT:
+#
+# The name of the target (php5.6, php7.0) for which to write the
+# configuration file.
+#
+# OUTPUT:
+#
+# None.
+#
+write_mod_php_conf() {
+	local target="${1}"
+	local conf_dir="${EROOT}"/var/lib/eselect-php
+	local conf_path="${conf_dir}/mod_php.conf"
+
+	mkdir -p "${conf_dir}" || die "failed to create ${conf_dir}"
+
+	# Parse the major version (for example "5" or "7") out of the
+	# target name.
+	local major="${target:3:1}"
+	cat <<-EOF > "${conf_path}" || die "failed to write mod_php.conf"
+	<IfModule !php${major}_module>
+	    LoadModule php${major}_module modules/mod_php.so
+	</IfModule>
+	EOF
+}
+
 resolv_target() {
 	local targets=( $(find_targets_$1) )
 	if is_number $2; then
@@ -279,18 +310,20 @@ list_fpm() {
 }
 
 set_apache2() {
-	local active_symlink libdir t=$(resolv_target apache2 $1)
+	local active_symlink libdir target=$(resolv_target apache2 $1)
 	active_symlink="$(get_apache2_active_symlink_path)"
 
-	[[ -z $t ]] && die -q "invalid target"
+	[[ -z $target ]] && die -q "invalid target"
 	for libdir in $(get_libdirs); do
 		rm --force "${active_symlink}" || \
 			die "failed to remove active module symlink"
 
-		@LN_S@ --force "../../${t}/apache2/libphp${t:3:1}.so" \
+		@LN_S@ --force "../../${target}/apache2/libphp${target:3:1}.so" \
 			"${active_symlink}" || \
 			die -q "failed to create active mod_php symlink"
 	done
+
+	write_mod_php_conf "${target}"
 	echo "Please restart apache for the changes to take effect."
 }