B2G repo setup and build quickstart

gistfile1.md

B2G Quickstart for Payments and Identity

This sets you up to make two separate targets:

• One for a desktop [simulator] 1
• One for the ZTE [device] 2

These are the moving parts:

• [mozilla-inbound repo] 3 clone (hg)
• [gaia repo] 4 fork (git)
• [B2G project clone] 5 (git)

Basic organization

I've structured my directories like so:

b2g-src/
  gaia/       # git clone of my gaia fork
  mi/         # hg clone of my mozilla-inbound user repo
  build/      # build dir that mi will create

b2g/          # git clone of mozilla-b2g/B2G

Prep steps: Setting up Mercurial Queues

Follow the steps in the [introduction to Mercurial queues] 6.

Read the [Mercurial queue workflow] 7 documentation.

Setting up the mozilla-inbound repo

This is where we will be working on navigator.id and friends.

First, cd b2g-src; mkdir mi; cd mi

In the mi directory:

hg init .
hg qinit -c    # initializes mercurial queues

Create and edit .hg/hgrc, filling in your LDAP username correctly:

[paths]
default = ssh://<LDAP_username>@mozilla.com@hg.mozilla.org/users/jparsons_mozilla.com/b2g-payments-identity/
mozilla-inbound = https://hg.mozilla.org/integration/mozilla-inbound/

Create and edit .hg/patches/.hg/hgrc

[paths]
default = http://hg.mozilla.org/users/jparsons_mozilla.com/b2g-payments-identity
default-push = ssh://hg.mozilla.org/users/jparsons_mozilla.com/b2g-payments-identity

Now you should be able to pull and build:

hg pull
hg update
make -f client.mk

Whoever is managing the shared user repo (me, in this case), would regularly do:

hg pull mozilla-inbound
hg update
make -f client.mk

You have to regularly blow away the ../build directory. Try that first if make crashes.

While that runs, set up Gaia.

Setting up gaia

cd b2g-src

Update with a git pull.

We need to create a default profile that will toggle the native identity features on.

Create the file custom-prefs.js in the root of the gaia directory. Put these lines in it:

pref("dom.identity.enabled", true);
pref("toolkit.identity.debug", true);

Build with:

DEBUG=1 make

You need network to build, since packages will be downloaded from nightly.

If you want to update the custom prefs at any time, you will need to re-build the profile (but not the whole project) with make profile.

Building for desktop or the device

Desktop builds

Create a .mozconfig file containing:

mk_add_options MOZ_OBJDIR=../build
mk_add_options MOZ_MAKE_FLAGS="-j8 -s"   # adjust -j for your number of cores

ac_add_options --enable-application=b2g
ac_add_options --disable-libjpeg-turbo
 
# This option is required if you want to be able to run Gaia's tests
ac_add_options --enable-tests

# turn on mozTelephony/mozSms interfaces
# Only turn this line on if you actually have a dev phone
# you want to forward to. If you get crashes at startup,
# make sure this line is commented.
#ac_add_options --enable-b2g-ril

If it crashes, try blowing away the build dir and makeing again.

Great! You've already built Gaia, so you can just run b2g like so:

build/dist/bin/b2g -profile gaia/profile --no-remote

You should see the emulator appear in all its glory.

Hotkeys:

• ESC for "back" button
• Home for to go to home screen. On the Mac, use Fn + left-arrow

MDN has more about [using the B2G desktop client] 8.

Building for the device

We clone the b2g project, but we will not use the repo sync script in it. Instead, we will make it use our own mozilla-inbound and gaia code.

git clone git clone https://github.com/mozilla-b2g/B2G b2g
cd b2g

Create .userconfig and add these lines (adjusting paths accordingly):

# Configuration for custom device builds;  Desktop builds ignore this.

GAIA_PATH=/path/to/b2g-src/gaia
GECKO_PATH=/path/to/b2g-src/mi

VARIANT=user  # 'user' strangely means 'production'
              # this option omits the test apps from the phone

Follow the [B2G Otoro setup instructions] 2. I can't summarize those steps here, because there are downloads and passwords involved. It's a short document that will take you through:

• setting up udev (on Linux)
• downloading the Adreno driver
• installing busybox on the phone

I honestly can't recall which of those steps I had to follow and which were already simplified somehow. But it was pretty straightforward.

Now configure, build, and flash:

./config.sh otoro   # assuming otoro is the correct target
./build.sh
./flash.sh

Running config.sh will download a ton of stuff the first time.

That's that. Time to go play with the phone.

Testing

We have notes about running xpshell tests in our [native identity warroom notes] 10.

Mochitests will not work in the b2g environment. For example:

# This will fail
TEST_PATH=browser/modules/test make -C ../build mochitest-browser-chrome

To test UI components that require mochi tests, either [push to the try server] 9 or apply your patch in your copy of the pine branch and run your tests there.