CI: Download the NDK libs

Now I can finally push all these changes, as the CI should also run and
we're ready to try out the new version of the app which uses libgit2
instead of jgit. Hopefully no user will notice anything different.

.circleci/config.yml

@@ -5,6 +5,9 @@ jobs:
       - image: vhanda/flutter-android:latest
     steps:
       - checkout
+      - run:
+          name: Get NDK Libraries
+          command: ./scripts/install_ndk_libs.sh
       - run:
           name: Test
           command: flutter test

scripts/install_ndk_libs.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+set -eux
+
+cd "$(dirname "$0")"/../android/app
+
+BUILD_NUM=$(curl -s 'https://circleci.com/api/v1.1/project/github/GitJournal/ndk-libraries?limit=1&offset=0&filter=succeeded' | jq .[0] | jq -r .build_num)
+echo "CircleCI Buld Number: $BUILD_NUM"
+
+URL=$(curl -s https://circleci.com/api/v1.1/project/github/GitJournal/ndk-libraries/$BUILD_NUM/artifacts | grep -o 'https://[^"]*libs.tar')
+
+echo "Downloading $URL"
+
+curl "$URL" -o "libs.tar"
+rm -rf libs
+tar xf libs.tar
+mv libs ci_libs
+mkdir libs
+cp -r ci_libs/openssl-lib/* libs/
+cp -r ci_libs/libssh2/* libs/
+cp -r ci_libs/libgit2/* libs/
+rm -rf ci_libs
+rm libs.tar