Checking for ANDROID_SDK_HOME and ANDROID_NDK_HOME variables before script execution

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

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