A script to work around a bug that for some reason prevents Android-related commands from being executable on Linux.

android-installer-for-unity.sh

#!/bin/bash

# Android-related commands are somewhat not executable on Linux, so install them again.
# cf. https://forum.unity.com/threads/android-sdk-ndk-and-openjdk-arent-marked-with-executable-permission-on-linux.1238494/

UNITY_EDITOR_ROOT="/path/to/Unity/Hub/Editor"
UNITY_EDITOR_VERSION="2021.3.3f1"
DESTINATION_ROOT="${UNITY_EDITOR_ROOT}/${UNITY_EDITOR_VERSION}/Editor/Data/PlaybackEngines/AndroidPlayer"

ANDROID_OPEN_JDK_URL=http://download.unity3d.com/download_unity/open-jdk/open-jdk-linux-x64/jdk8u172-b11_4be8440cc514099cfe1b50cbc74128f6955cd90fd5afe15ea7be60f832de67b4.zip
ANDROID_SDK_NDK_TOOLS_URL=https://dl.google.com/android/repository/sdk-tools-linux-4333796.zip
ANDROID_SDK_PLATFORMS_29_URL=https://dl.google.com/android/repository/platform-29_r05.zip
ANDROID_NDK_URL=https://dl.google.com/android/repository/android-ndk-r21d-linux-x86_64.zip
ANDROID_SDK_PLATFORM_TOOLS_URL=https://dl.google.com/android/repository/platform-tools_r30.0.4-linux.zip
ANDROID_SDK_PLATFORMS_30_URL=https://dl.google.com/android/repository/platform-30_r03.zip
ANDROID_SDK_BUILD_TOOLS_URL=https://dl.google.com/android/repository/build-tools_r30.0.2-linux.zip

# install android-open-jdk
ANDROID_OPEN_JDK_TMP_PATH=/tmp/android-open-jdk.zip
curl -X GET ${ANDROID_OPEN_JDK_URL} -o ${ANDROID_OPEN_JDK_TMP_PATH}
unzip -o ${ANDROID_OPEN_JDK_TMP_PATH} -d ${DESTINATION_ROOT}/OpenJDK
rm ${ANDROID_OPEN_JDK_TMP_PATH}

# install android-sdk-ndk-tools
ANDROID_SDK_NDK_TOOLS_TMP_PATH=/tmp/android-sdk-ndk-tools.zip
curl -X GET ${ANDROID_SDK_NDK_TOOLS_URL} -o ${ANDROID_SDK_NDK_TOOLS_TMP_PATH}
unzip -o ${ANDROID_SDK_NDK_TOOLS_TMP_PATH} -d ${DESTINATION_ROOT}/SDK
rm ${ANDROID_SDK_NDK_TOOLS_TMP_PATH}

# install android-sdk-platforms-29
ANDROID_SDK_PLATFORMS_29_TMP_PATH=/tmp/android-sdk-platforms-29.zip
curl -X GET ${ANDROID_SDK_PLATFORMS_29_URL} -o ${ANDROID_SDK_PLATFORMS_29_TMP_PATH}
unzip -o ${ANDROID_SDK_PLATFORMS_29_TMP_PATH} -d ${DESTINATION_ROOT}/SDK/platforms
rm ${ANDROID_SDK_PLATFORMS_29_TMP_PATH}

# install android-ndk
ANDROID_NDK_TMP_PATH=/tmp/android-ndk.zip
curl -X GET ${ANDROID_NDK_URL} -o ${ANDROID_NDK_TMP_PATH}
unzip -o ${ANDROID_NDK_TMP_PATH} -d /tmp/NDK
cp -rp /tmp/NDK/android-ndk-r21d/* ${DESTINATION_ROOT}/NDK
rm -rf /tmp/NDK
rm ${ANDROID_NDK_TMP_PATH}

# install android-sdk-platform-tools
ANDROID_SDK_PLATFORM_TOOLS_TMP_PATH=/tmp/android-sdk-platform-tools.zip
curl -X GET ${ANDROID_SDK_PLATFORM_TOOLS_URL} -o ${ANDROID_SDK_PLATFORM_TOOLS_TMP_PATH}
unzip -o ${ANDROID_SDK_PLATFORM_TOOLS_TMP_PATH} -d ${DESTINATION_ROOT}/SDK
rm ${ANDROID_SDK_PLATFORM_TOOLS_TMP_PATH}

# install android-sdk-platforms-30
ANDROID_SDK_PLATFORMS_30_TMP_PATH=/tmp/android-sdk-platforms-30.zip
curl -X GET ${ANDROID_SDK_PLATFORMS_30_URL} -o ${ANDROID_SDK_PLATFORMS_30_TMP_PATH}
unzip -o ${ANDROID_SDK_PLATFORMS_30_TMP_PATH} -d ${DESTINATION_ROOT}/SDK/platforms
rm ${ANDROID_SDK_PLATFORMS_30_TMP_PATH}

# install android-sdk-build-tools
ANDROID_SDK_BUILD_TOOLS_TMP_PATH=/tmp/android-sdk-build-tools.zip
curl -X GET ${ANDROID_SDK_BUILD_TOOLS_URL} -o ${ANDROID_SDK_BUILD_TOOLS_TMP_PATH}
unzip -o ${ANDROID_SDK_BUILD_TOOLS_TMP_PATH} -d ${DESTINATION_ROOT}/SDK/build-tools
rm ${ANDROID_SDK_BUILD_TOOLS_TMP_PATH}