VARIANT_CHOICES=(user userdebug eng)，# TARGET_BUILD_VARIANT變數的可能值
#LUNCH_MENU_CHOICES是供使用者選擇的prodcut列表,
#每次source build/envsetup.sh時需重置變數LUNCH_MENU_CHOICES
#不然後續的include vendor/cm/vendorsetup.sh時會繼續新增產品至變數LUNCH_MENU_CHOICES裡，
#導致出現很多重複產品
unset LUNCH_MENU_CHOICES 
add_lunch_combo full-eng #預設新增full-eng，full_mips-eng等4個產品
add_lunch_combo full_x86-eng
add_lunch_combo vbox_x86-eng
add_lunch_combo full_mips-eng
alias bib=breakfast#給breakfast起別名
complete -F _lunch lunch #給lunch新增tab提示
case `uname -s` in #定義sgrep函式 在所有工程型別程式碼裡搜尋
    Darwin)
        function sgrep()
        {
            find -E . -name .repo -prune -o -name .git -prune -o  -type f \
                 -iregex '.*\.(c|h|cpp|S|java|xml|sh|mk)' -print0 \
                 | xargs -0 grep --color -n "[email protected]"
        }
        ;;
    *)
        function sgrep()
        {
            find . -name .repo -prune -o -name .git -prune -o  -type f \
                 -iregex '.*\.\(c\|h\|cpp\|S\|java\|xml\|sh\|mk\)' -print0 \ 
                 | xargs -0 grep --color -n "[email protected]"
        }
        ;;
esac
export -f cmremote
export -f aospremote
alias mmp='dopush mm' #定義更多編譯後push到裝置的函式的操作
alias mmmp='dopush mmm'
alias mkap='dopush mka'
alias cmkap='dopush cmka'
if [ "x$SHELL" != "x/bin/bash" ]; then #只支援Bash終端
    case `ps -o command -p $$` in
        *bash*)
            ;;
        *)
            echo "WARNING: Only bash is supported,"  \
                 "use of other shell would lead to erroneous results"
            ;;
    esac
fi
#Execute the contents of any vendorsetup.sh files we can find.
#source vendor和device下能找到的所有vendorsetup.sh
for f in `/bin/ls vendor/*/vendorsetup.sh vendor/*/*/vendorsetup.sh device/*/*/vendorsetup.sh 2> /dev/null`
do
    echo "including $f"
    . $f
done
unset f
#source目錄 sdk/bash_completion vendor/cm/bash_completion下的bash指令碼，
#能提供tab提示
addcompletions 
export ANDROID_BUILD_TOP=$(gettop)