udpated README and build scripts

.gitignore

@@ -1,3 +1,7 @@
+# NDK
+NDK/
+rust/.cargo
+
 # rust output file
 *.a
 *.so

README.md

@@ -1,14 +1,34 @@
 # native-signer
 
-```
-npm i
-npm start
-```
+### Requirements
+
+- `node.js` (tested on `v7.4.0`)
+- `npm` (tested on `4.0.5`)
+- `multirust` (tested on `0.8.0 (8654d1c07 2016-03-08 23:02:12 +0000)`)
+- `rustc` (tested on `1.15.1 (021bd294c 2017-02-08)`)
+- `cargo` (tested on `0.16.0-nightly (6e0c18c 2017-01-27)`)
+- `android_ndk` (tested on `r13b`)
+- `Xcode` (only, for iOS, tested on `Version 8.1 (8B62)`)
+- `$NDK_HOME` envarionment variable set to ndk home directory (eg. `/usr/local/opt/android-ndk`)
+
+### setup
+
+- macOS
+
+    ```
+    ./setup_macos.sh
+    ```
+
+- linux
+
+    ```
+    ./setup_linux.sh
+    ```
 
 ### usage
 
 #### Create new account
- 
+
 seed: `this is sparta`
 
 address: `006E27B6A72E1f34C626762F3C4761547Aff1421`

cargo-config.toml.template

@@ -0,0 +1,11 @@
+[target.aarch64-linux-android]
+ar = "$PWD/NDK/arm64/bin/aarch64-linux-android-ar"
+linker = "$PWD/NDK/arm64/bin/aarch64-linux-android-gcc"
+
+[target.armv7-linux-androideabi]
+ar = "$PWD/NDK/arm/bin/arm-linux-androideabi-ar"
+linker = "$PWD/NDK/arm/bin/arm-linux-androideabi-gcc"
+
+[target.i686-linux-android]
+ar = "$PWD/NDK/x86/bin/i686-linux-android-ar"
+linker = "$PWD/NDK/x86/bin/i686-linux-android-gcc"

create-ndk-standalone.sh

@@ -0,0 +1,40 @@
+#! /bin/sh
+
+# based on https://github.com/kennytm/rust-ios-android
+
+set -euo pipefail
+
+if [ -d NDK ]; then
+    printf '\e[33;1mStandalone NDK already exists... Delete the NDK folder to make a new one.\e[0m\n\n'
+    printf '$ rm -rf NDK\n'
+    exit 0
+fi
+
+MAKER="$NDK_HOME/build/tools/make_standalone_toolchain.py"
+
+if [ -x "$MAKER" ]; then
+    MAKER="$(brew --prefix android-ndk)/build/tools/make_standalone_toolchain.py"
+fi
+
+if [ -x "$MAKER" ]; then
+    echo 'Creating standalone NDK...'
+else
+    printf '\e[91;1mPlease install `android-ndk`!\e[0m\n\n'
+    printf '$ brew install android-ndk\n'
+    exit 1
+fi
+
+mkdir NDK
+cd NDK
+
+for ARCH in arm64 arm x86; do
+    echo "($ARCH)..."
+    "$MAKER" --arch $ARCH --install-dir $ARCH
+done
+
+echo 'Updating ./rust/.cargo/config.toml...'
+
+cd ..
+mkdir -p rust/.cargo
+sed 's|$PWD|'"${PWD}"'|g' cargo-config.toml.template > ./rust/.cargo/config
+

package.json

@@ -3,8 +3,7 @@
   "version": "0.0.1",
   "private": true,
   "scripts": {
-    "installX": "cd rust/signer && ./setup.sh",
-    "build-rust": "cd rust/signer && make",
+    "build-rust": "cd rust/signer && make ios",
     "start": "npm run build-rust && node node_modules/react-native/local-cli/cli.js run-ios",
     "test": "jest"
   },

rust/signer/.gitignore

@@ -1,2 +1 @@
 target
-Cargo.lock