Add README with instructions for building mojo and prereqs.
Change-Id: I4c67cce6972398845693d7c442f9e05228ef046a
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+# Ether
+
+This project exposes Syncbase as a Mojo service.
+
+Read the [architecture proposal].
+
+## Initial Mojo setup
+
+You must have the Mojo repo in $MOJO_DIR.
+
+This section only needs to be run once.
+
+See the [mojo readme] for more comprehensive instructions.
+
+### Install Mojo prereqs
+
+1. Install [depot tools].
+2. Install [Goma][goma].
+3. Put the following in your .bashrc:
+
+ # NOTE: Actual locations depend on where you installed depot_tools and goma.
+ export PATH=${PATH}:${HOME}/dev/depot_tools
+ export GOMA_DIR=${HOME}/goma
+
+ export MOJO_DIR=${HOME}/mojo
+
+### Download Mojo repo
+
+ $ mkdir $MOJO_DIR && cd $MOJO_DIR
+
+ # NOTE: This step takes about 10 min.
+ $ fetch mojo --target_os=android,linux
+
+ # NOTE: This step also takes about 10 min. Furthermore, the script uses
+ # 'sudo', so you will need to enter your password.
+ $ cd src && ./build/install-build-deps-android.sh
+
+## Update Mojo and compile resources
+
+This updates the Mojo repo to HEAD, and builds the Mojo resources needed to
+compile Ether.
+
+Run this while you grab your morning coffee.
+
+1. Start by updating the repo.
+
+ $ cd $MOJO_DIR/src
+ $ git checkout master
+ $ git pull
+ $ gclient sync
+
+2. Compile for Linux. Built resources will be in $MOJO_DIR/src/out/Debug
+
+ $ ./mojo/tools/mojob.py gn
+ $ ./mojo/tools/mojob.py build # NOTE: This can take up to 10 minutes.
+
+3. Compile for Android. Built resources will be in $MOJO_DIR/src/out/android_Debug
+
+ $ ./mojo/tools/mojob.py gn --android
+ $ ./mojo/tools/mojob.py build --android # NOTE: This can take up to 10 minutes.
+
+[architecture proposal]: https://docs.google.com/document/d/1TyxPYIhj9VBCtY7eAXu_MEV9y0dtRx7n7UY4jm76Qq4/edit
+[depot tools]: http://www.chromium.org/developers/how-tos/install-depot-tools
+[goma]: https://sites.google.com/a/google.com/goma/how-to-use-goma/how-to-use-goma-for-chrome-team
+[mojo readme]: https://github.com/domokit/mojo/blob/master/README.md
