work on test prepare script, make the whole thing optional

.gitignore

@@ -14,6 +14,9 @@ ant.properties
 .gradle
 build
 gradle.properties
+# this is in here because the prepare-tests thing modifies it, and we DON'T
+# want this to be commited.  use git add -f to work on this file.
+settings.gradle
 
 #Maven
 target

.travis.yml

@@ -12,7 +12,7 @@ before_install:
     # Install required Android components.
     #- echo "y" | android update sdk -a --filter build-tools-19.1.0,android-19,platform-tools,extra-android-support,extra-android-m2repository --no-ui --force
     - ( sleep 5 && while [ 1 ]; do sleep 1; echo y; done ) | android update sdk --no-ui --all --force --filter build-tools-19.1.0,android-19,platform-tools,extra-android-support,extra-android-m2repository
-    - ./install-custom-gradle-test-plugin.sh
+    - ./prepare-tests.sh
 install: echo "Installation done"
 script:
     - gradle assemble -S -q

install-custom-gradle-test-plugin.sh

@@ -1,15 +0,0 @@
-#!/bin/bash
-
-mkdir temp
-cd temp
-
-  git clone https://github.com/nenick/gradle-android-test-plugin.git
-  cd gradle-android-test-plugin
-
-    echo "rootProject.name = 'gradle-android-test-plugin-parent'" > settings.gradle
-    echo "include ':gradle-android-test-plugin'" >> settings.gradle
-
-    ./gradlew :gradle-android-test-plugin:install
-
-  cd ..
-cd ..

prepare-tests.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# This script installs a plugin which is necessary to run OpenKeychain's tests
+# into the local maven repository, then puts a line to include the -Test
+# subproject into settings.gradle
+
+echo "checking jdk runtime.."
+if ! java -version 2>&1 | grep OpenJDK; then
+    echo "tests will only run on openjdk, see readme for details!" >&2
+    return
+fi
+
+tmpdir="$(mktemp -d)"
+(
+  cd "$tmpdir";
+  git clone https://github.com/nenick/gradle-android-test-plugin.git
+  cd gradle-android-test-plugin
+  echo "rootProject.name = 'gradle-android-test-plugin-parent'" > settings.gradle
+  echo "include ':gradle-android-test-plugin'" >> settings.gradle
+  ./gradlew :gradle-android-test-plugin:install
+)
+rm -rf "$tmpdir"
+
+echo -n "ok, adding tests to include list.. "
+if grep OpenKeychain-Test settings.gradle >/dev/null ; then
+    echo " already in."
+else
+    echo "include ':OpenKeychain-Test'" >> settings.gradle
+    echo "ok"
+fi

settings.gradle

@@ -1,5 +1,4 @@
 include ':OpenKeychain'
-include ':OpenKeychain-Test'
 include ':extern:openpgp-api-lib'
 include ':extern:openkeychain-api-lib'
 include ':extern:html-textview'