Add script to determine required xDebug version.

Author: Potherca

docker/xdebug.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+set -o errexit  # Exit script when a command exits with non-zero status.
+#set -o errtrace # Exit on error inside any functions or sub-shells.
+set -o nounset  # Exit script on use of an undefined variable.
+#set -o pipefail # Return exit status of the last command in the pipe that exited with a non-zero exit code
+
+if [ -z "${NEXTCLOUD_VERSION}" ]; then
+    echo >&2 'The "NEXTCLOUD_VERSION" variable MUST be set during build: docker build --build-arg "NEXTCLOUD_VERSION=..."'
+    exit 65
+else
+    echo "NEXTCLOUD_VERSION is set to '${NEXTCLOUD_VERSION}'"
+fi
+
+PHP_VERSION="${PHP_VERSION:-$(php -r 'echo PHP_VERSION;')}"
+PHP_MAJOR="${PHP_VERSION%%.*}"
+PHP_MINOR="$(echo "${PHP_VERSION}" | awk -F. '{print $2}')"
+
+if [ -z "${XDEBUG_VERSION:-}" ]; then
+    if [ "$PHP_MAJOR" -eq 8 ]; then
+        XDEBUG_VERSION=3.4.3
+    elif [ "$PHP_MAJOR" -eq 7 ]; then
+        if [ "$PHP_MINOR" -ge 2 ] && [ "$PHP_MINOR" -le 4 ]; then
+            XDEBUG_VERSION=3.1.6
+        elif [ "$PHP_MINOR" -eq 1 ]; then
+            XDEBUG_VERSION=2.9.8
+        elif [ "$PHP_MINOR" -eq 0 ]; then
+            XDEBUG_VERSION=2.7.2
+        else
+            echo >&2 "Unsupported PHP 7 minor version: $PHP_MINOR"
+            exit 66
+        fi
+    elif [ "$PHP_MAJOR" -eq 5 ]; then
+        if [ "$PHP_MINOR" -ge 5 ] && [ "$PHP_MINOR" -le 6 ]; then
+            XDEBUG_VERSION=2.5.5
+        elif [ "$PHP_MINOR" -eq 4 ]; then
+            XDEBUG_VERSION=2.4.1
+        else
+            echo >&2 "Unsupported PHP 5 minor version: $PHP_MINOR"
+            exit 67
+        fi
+    else
+        echo >&2 "Unsupported PHP version: ${PHP_VERSION}"
+        exit 68
+    fi
+fi
+
+echo "${XDEBUG_VERSION}" > /xdebug.version