start_android_env.sh

#!/bin/bash
##########################################################################
#
# Start a valid Android/TWRP build environment on Arch Linux
#
# Copyright:    steadfasterX <steadfasterX -at- gmail -DoT- com>, 2018
# License:      LGPL v2
##########################################################################
#
# Requirements:
#       $> pacman -Sy python2-virtualenv
#
#       $> cd ~
#       $> virtualenv2 venvpy2 (will create an virtual env named venvpy2)
#       $> ln -s /usr/lib/python2.7/* ~/venvpy2/lib/python2.7/
#
##########################################################################
SRCONLY=0
BIN=${0##*/}
F_HELP(){
    cat <<EOHELP

    Starts a valid Android/TWRP build environment on Arch Linux


    Usage:
    ---------------------------------------------------------------------
    $BIN id|manual [dir]

    
    At the moment the only fully working mode is "manual":

    $BIN manual dirname
    (e.g.: $BIN manual omni)


    You must adjust the BDIR variable in $BIN which must be 1 dir before
    the sources directory. This makes sure you can use multiple subdirs e.g
    having one for TWRP (e.g. omni), one for LOS 14.1 (e.g. los14) and so on

    Current BDIR is: $BDIR
    Available dirs within BDIR (can be used by manual mode):
    $(for d in $(find $BDIR -maxdepth 1 -type d);do echo -e "\t${d/$BDIR/}" | tr -d "/" ;done)


EOHELP
}
# ensure we fail completely when any tiny bit fails
set -e

###########################################################################
# VARIABLE SECTION
#

# change this to the name of your virtualenv environment name you created
VENVNAME=venvpy2

source ~/$VENVNAME/bin/activate && echo venv sourced...

# when building with jack how much RAM should it suck?
JACKRAM=10G

# ccache settings
CACHESIZE=10G                   # the ccache size on disk
export USE_CCACHE=1             # enable / disable ccache
export CCACHE_DIR=~/.ccache     # best is having this on a diff disk then your $BDIR

# force java home set (needed for some special cases)
export ANDROID_SET_JAVA_HOME=true

# your path to the java jdk (will be set to JAVA_HOME)
# you can set different MY_JAVA_HOME's in the "check how we started" case condition!!
MY_JAVA_HOME=/usr/lib/jvm/java-8-openjdk

# special var for TWRP
export TW_DEVICE_VERSION="$(date +%F)"

# the hostname which should be displayed in your builds (settings->about etc)
export HOSTNAME="sfxbook-droid"

# the user which should be displayed in your builds (settings->about etc)
export USER=steadfasterx

# sets a part of the bash prompt to identify where you are in
BASHPROMPT=android      # can be overwritten by the "check how we started" case condition
PDIRSIZE='\\W'          # \\W means only the current dirname. \\w means the FULL path

# where is your MAIN android source dir (1 level BEFORE your sources dir)
# when starting this script with an argument you can automate the lunch cmd
# (just extend the "check how we started" case condition 
BDIR=/opt/data/development/android_build

# check how we started
case $1 in
    -help|--help|-h|help)
    F_HELP
    exit
    ;;
    twrp)
    ADIR=omni
    SELECTDEVICE="lunch omni_g4-eng"
    BASHPROMPT=TWRP
    ;;
    los15)
    ADIR="los/15.1"
    ;;
    manual) # will just display a copy/paste template
    ADIR=$2
    BASHPROMPT="$ADIR"
    SRCONLY=1
    ;;
    *)
    ADIR="$1"
    BASHPROMPT="$ADIR"
    ;;
esac

#
# END - VARIABLE SECTION
#######################################################################################
# no changes beyond here needed (usually)
#

[ -z $ADIR ] && echo "require a starting dir.. ABORTED" && exit 1

# some special vars
export HISTFILE="$HOME/.android_big_history"                # sets the path to a custom history file for android building
export HISTFILESIZE="200000"                            # max lines of $HISTFILE at startup time of a session (e.g. 100k have an avg of ~4MB file size)
export HISTSIZE="10000"                                 # max lines that are stored in MEMORY(!) in a history list while your bash session is ONGOING

[ ! -f $HISTFILE ] && touch $HISTFILE

# required! otherwise build will fail :p
export LANG=$LANG
export LC_ALL=C

ccache --set-config=max_size=$CACHESIZE

# prepare the basics
cd ${BDIR}/${ADIR}
ENVSRC=custombuildenv

cat >$ENVSRC<<EOHOST
# needed to overwrite the build hostname
alias hostname='echo $HOSTNAME'
EOHOST
source build/envsetup.sh
$SELECTDEVICE

# jack args
export ANDROID_JACK_VM_ARGS="-Dfile.encoding=UTF-8 -XX:+TieredCompilation -Xmx${JACKRAM}"

# MUST BE DONE AFTER LUNCH!
# this here is needed as LUNCH will overwrite anything which was set!
export JAVA_HOME="$MY_JAVA_HOME"

# ensure that all parent functions will be exported to the subshells
lsfns () {
   case "$1" in
      -v | v*)
         # verbose:
         set | grep '()' --color=always
         ;;
      *)
         declare -F | cut -d" " -f3 
         ;;
   esac
}
# not needed atm.. leaving it here for future ref
#lsvars () {
#   case "$1" in
#      -v | v*)
#         # verbose:
#         set | egrep '^\w+=' --color=always | egrep -v "PATH="
#         ;;
#      *)
#        #export -p | cut -d " " -f3 | egrep -v "PATH"
#         ;;
#   esac
#}
#export $(lsvars)

PYVER=$(python --version 2>&1)

# set bash prompt
echo "PS1='\[\033[01;32m\]['${BASHPROMPT}' ('${VIRTUAL_ENV##*/}')]\[\033[01;37m\] [\['$PDIRSIZE']\$\[\033[00m\] '" >> $ENVSRC

if [ $SRCONLY -eq 0 ] ;then
    export -f $(lsfns)

    # fasten your seat bells.. the magic happens NOW!
    /bin/bash --rcfile <(echo "echo -e \"\nAndroid build environment has been setup:\n\tpython: $PYVER\n\tuse ccache: $USE_CCACHE\n\tJAVA_HOME: $JAVA_HOME\n\tTW_DEVICE_VERSION: $TW_DEVICE_VERSION\n\tbuild user: $USER\n\thost set: $HOSTNAME\n\";source $ENVSRC")

    #/bin/bash  -c "echo -e \"\nAndroid build environment has been setup:\n\tpython: $(python --version 2>&1)\n\tuse ccache: $USE_CCACHE\n\tJAVA_HOME: $JAVA_HOME\n\tTW_DEVICE_VERSION: $TW_DEVICE_VERSION\n\tbuild user: $USER\n\thost set: $HOSTNAME\n\"; \
     #          $SHELL --rcfile $ENVSRC"
else
    echo "copy & paste only mode.."
    cat >$ENVSRC<<EOFSRC
export USE_CCACHE=$USE_CCACHE
export CCACHE_DIR="$CCACHE_DIR"
export ANDROID_SET_JAVA_HOME=true
export TW_DEVICE_VERSION="$(date +%F)"
export HOSTNAME=$HOSTNAME
export USER=$USER
export BASHPROMPT="$BASHPROMPT"
export PDIRSIZE="$PDIRSIZE"
export BDIR="$BDIR"
export HISTFILE="$HOME/.android_big_history"
export HISTFILESIZE="200000"
export HISTSIZE="10000"
export LANG="$LANG"
export LC_ALL=C
alias hostname='echo $HOSTNAME'
export ANDROID_JACK_VM_ARGS="$ANDROID_JACK_VM_ARGS"
export JAVA_HOME="$MY_JAVA_HOME"
PROMPT_COMMAND="history -a; $PROMPT_COMMAND"
PS1='\[\033[01;32m\]['${BASHPROMPT}' ('${VIRTUAL_ENV##*/}')]\[\033[01;37m\] [\['$PDIRSIZE']\$\[\033[00m\] '
EOFSRC
    cat <<EOFCP

copy everything between these 2 lines and paste it to your shell
*****************************************************************

  cd ${BDIR}/${ADIR}
  ccache --set-config=max_size=$CACHESIZE
  source ~/$VENVNAME/bin/activate
  source build/envsetup.sh
  source $ENVSRC
  history -r $HISTFILE


*****************************************************************

DO NOT FORGET to lunch ;)


EOFCP
fi