From 2f85b4524c9c7c6662a784be77d235c05392e7d4 Mon Sep 17 00:00:00 2001
From: Javernaut <javernaut@gmail.com>
Date: Sun, 22 Mar 2020 11:42:55 +0200
Subject: [PATCH] Checking for ANDROID_SDK_HOME and ANDROID_NDK_HOME variables
 before script execution

---
 ffmpeg-android-maker.sh       |  3 +++
 scripts/check-host-machine.sh | 16 ++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100755 scripts/check-host-machine.sh

diff --git a/ffmpeg-android-maker.sh b/ffmpeg-android-maker.sh
index 19b2780..8cba281 100755
--- a/ffmpeg-android-maker.sh
+++ b/ffmpeg-android-maker.sh
@@ -18,6 +18,9 @@ export SCRIPTS_DIR=${BASE_DIR}/scripts
 # All FFmpeg's libraries and headers are copied there
 export OUTPUT_DIR=${BASE_DIR}/output
 
+# Check the host machine for proper setup and fail fast otherwise
+${SCRIPTS_DIR}/check-host-machine.sh || exit 1
+
 # Directory to use as a place to build/install FFmpeg and its dependencies
 BUILD_DIR=${BASE_DIR}/build
 # Separate directory to build FFmpeg to
diff --git a/scripts/check-host-machine.sh b/scripts/check-host-machine.sh
new file mode 100755
index 0000000..faf3280
--- /dev/null
+++ b/scripts/check-host-machine.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+function checkVariablePresence() {
+  VARIABLE_NAME=$1
+  if [[ -z "${!VARIABLE_NAME}" ]]; then
+    echo "The ${VARIABLE_NAME} environment variable isn't defined"
+    echo $2
+    exit 1
+  fi
+}
+
+checkVariablePresence "ANDROID_SDK_HOME" \
+  "The variable should be set to the actual Android SDK path" || exit 1
+
+checkVariablePresence "ANDROID_NDK_HOME" \
+  "The variable should be set to the actual Android NDK path" || exit 1