Merge "Script to set up android build directory"

#! /bin/bash

#

# Sets the current directory as Android build output directory for a

# given target by writing the "prefix script" to it. Commands prefixed

# by this script are executed in the Android build environment. E.g.,

# running

#   ./run <command>

# runs <command> as if we issued

#   cd <source>

#   mount --bind <build dir> out

#   . build/envsetup.sh

#   lunch <config>

#   <command>

#   exit

#

# This arrangement eliminates the need to issue envsetup/lunch commands

# manually, and allows to run multiple builds from the same shell.

# Thus, if your source tree is in ~/aosp and you are building for

# 'blueline' and 'cuttlefish', issuing

#   cd /sdx/blueline && \

#      ~/aosp/build/soong/scripts/setup-android-build.sh aosp_blueline-userdebug

#   cd /sdx/cuttlefish && \

#      ~/aosp/build/soong/scripts/setup-android-build.sh aosp_cf_arm64_phone-userdebug

# sets up build directories in /sdx/blueline and /sdx/cuttlefish respectively.

# After that, issue

#   /sdx/blueline/run m

# to build blueline image, and issue

#   /sdx/cuttlefish atest CtsSecurityBulletinHostTestCases

# to run CTS tests. Notice there is no need to change to a specific directory for that.

#

# Argument:

# * configuration (one of those shown by `lunch` command).

#

set -e

function die() { printf "$@"; exit 1; }

# Find out where the source tree using the fact that we are in its

# build/ subdirectory.

[[ "$(uname)" == Linux ]] || die "This setup runs only on Linux\n"

declare -r mydir="${0%/*}"

declare -r source="${mydir%/build/soong/scripts}"

[[ "/${mydir}/" =~ '/build/soong/scripts/' ]] || \

  die "$0 should be in build/soong/scripts/ subdirectory of the source tree\n"

[[ ! -e .repo && ! -e .git ]] || \

  die "Current directory looks like source. You should be in the _target_ directory.\n"

# Do not override old run script.

if [[ -x ./run ]]; then

  # Set variables from config=xxx and source=xxx comments in the existing script.

  . <(sed -nr 's/^# *source=(.*)/oldsource=\1/p;s/^# *config=(.*)/oldconfig=\1/p' run)

  die "This directory has been already set up to build Android for %s from %s.\n\

Remove 'run' file if you want to set it up afresh\n" "$oldconfig" "$oldsource"

fi

(($#<2)) || die "usage: %s [<config>]\n" $0

if (($#==1)); then

  # Configuration is provided, emit run script.

  declare -r config="$1"

  declare -r target="$PWD"

  cat >./run <<EOF

#! /bin/bash

# source=$source

# config=$config

declare -r cmd=\$(printf ' %q' "\$@")

"$source/prebuilts/build-tools/linux-x86/bin/nsjail"\

 -Mo -q -e -t 0\

 -EANDROID_QUIET_BUILD=true \

 -B / -B "$target:$source/out"\

 --cwd "$source"\

 --skip_setsid \

 --keep_caps\

 --disable_clone_newcgroup\

 --disable_clone_newnet\

 --rlimit_as soft\

 --rlimit_core soft\

 --rlimit_cpu soft\

 --rlimit_fsize soft\

 --rlimit_nofile soft\

 --proc_rw\

 --hostname $(hostname) \

 --\

 /bin/bash -i -c ". build/envsetup.sh && lunch "$config" &&\$cmd"

EOF

  chmod +x ./run

else

  # No configuration, show available ones.

  printf "Please specify build target. Common values:\n"

  (cd "$source"

   . build/envsetup.sh

   get_build_var COMMON_LUNCH_CHOICES | tr ' ' '\n' | pr -c4 -tT -W"$(tput cols)"

  )

  exit 1

fi