Android: add a script which allows headless installation of the Android tools required for compilation

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28525 a1c6a512-1295-4272-9138-f99709370657

android/README

@@ -3,7 +3,7 @@ application for android.
 
 * Prerequisites
 
-Download and install the Android SDK[1] and NDK[2].
+Download and install the Android SDK[1] and NDK[2], or run installToolchain.sh.
 After you extracted the SDK, you need to run <sdk-dir>/tools/android in order to
 install the actual platform sdk from the available packages tab (SDK Platform
 Android 1.5 or above should work).

android/installToolchain.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+
+# Abort execution as soon as an error is encountered
+# That way the script do not let the user think the process completed correctly
+# and leave the opportunity to fix the problem and restart compilation where
+# it stopped
+set -e
+
+# http://developer.android.com/sdk/index.html
+SDK_URL="http://dl.google.com/android/android-sdk_r07-linux_x86.tgz"
+# http://developer.android.com/sdk/ndk/index.html
+NDK_URL="http://dl.google.com/android/ndk/android-ndk-r4b-linux-x86.zip"
+
+prefix="${INSTALL_PREFIX:-$HOME}"
+dldir="${DOWNLOAD_DIR:-/tmp}"
+
+SDK_PATH=$(find $prefix -maxdepth 1 -name "android-sdk-*")
+NDK_PATH=$(find $prefix -maxdepth 1 -name "android-ndk-*")
+
+download_and_extract() {
+    url="$1"
+    name=${url##*/}
+    local_file="$dldir/$name"
+    if [ \! -f "$local_file" ]; then
+        echo " * Downloading $name..."
+        wget -O "$local_file" $1
+    fi
+
+    echo " * Extracting $name..."
+    case ${local_file#*.} in
+        zip)
+            unzip -qo -d "$prefix" "$local_file"
+            ;;
+        tgz|tar.gz)
+            (cd $prefix; tar -xf "$local_file")
+            ;;
+        *)
+            echo "Couldn't figure out how to extract $local_file" ! 1>&2
+            ;;
+    esac
+}
+
+if [ -z "$SDK_PATH" ]; then
+    download_and_extract $SDK_URL
+    SDK_PATH=$(realpath $prefix/android-sdk-*)
+fi
+if [ -z "$NDK_PATH" ]; then
+    download_and_extract $NDK_URL
+    NDK_PATH=$(realpath $prefix/android-ndk-*)
+fi
+
+if [ -z "$(find $SDK_PATH/platforms -type d -name 'android-*')" ]; then
+    echo " * Installing Android platforms..."
+    $SDK_PATH/tools/android update sdk --no-ui --filter platform,tool
+fi
+
+cat <<EOF
+ * All done!
+
+Please set the following environment variables before running tools/configure:
+export \$ANDROID_SDK_PATH=$SDK_PATH
+export \$ANDROID_NDK_PATH=$NDK_PATH
+
+EOF