My Chromium virtualenv (note: needs goma)

activate.sh

#!/bin/bash

# If this file isn't being run as a source, source it.
if (return 0 2>/dev/null); then

    deactivate () {
        goma_ctl ensure_stop

        export PATH="$OLD_PATH"
        unset OLD_PATH
        export PS1="$OLD_PS1"
        unset OLD_PS1
        unset -f deactivate
        unset -f build
        unset -f build_important
    }

    build () {
        NINJA_BUILD_IN_BACKGROUND=1
        DEFAULT_NUM_JOBS=5000
        NUM_JOBS=0
        BUILD_DIR=out/Default
        while true; do
            case $1 in
                -h|--help)
                    echo "build [--important] [-C <build_dir>] [<build_targets>...]"
                    exit 0
                ;;
                --important)
                    NINJA_BUILD_IN_BACKGROUND=0
                    DEFAULT_NUM_JOBS=5000
                    shift
                    continue
                ;;
                -C)
                    shift
                    if [[ $1 == "" ]]; then
                        echo "build [--important] [-C <build_dir>] [<build_targets>...]"
                        exit 0
                    fi
                    if [[ $1 == */* ]]; then
                        BUILD_DIR="$1"
                    else
                        BUILD_DIR="out/$1"
                    fi
                    shift
                    continue
                ;;
                -j)
                    shift
                    if [[ $1 == "" ]]; then
                        echo "build [--important] [-C <build_dir>] [<build_targets>...]"
                        exit 0
                    fi
                    NUM_JOBS="$1"
                    shift
                    continue
                ;;
                *)
                    break
                ;;
            esac
        done
        if (( $NUM_JOBS <= 0 )); then
            NUM_JOBS="$DEFAULT_NUM_JOBS"
        fi

        declare -a ARGS
        for arg in "$@"; do
            if [[ "$arg" == "chromium" ]]; then
                arg="chrome"
            fi
            ARGS+=("$arg")
        don
        if (( "${#ARGS[*]}" == 0 )); then
            ARGS+=("blink_tests")
        fi

        echo NINJA_BUILD_IN_BACKGROUND="${NINJA_BUILD_IN_BACKGROUND}" autoninja -C "$BUILD_DIR" -j "$NUM_JOBS" "${ARGS[@]}"
        NINJA_BUILD_IN_BACKGROUND="${NINJA_BUILD_IN_BACKGROUND}" autoninja -C "$BUILD_DIR" -j "$NUM_JOBS" "${ARGS[@]}"
        if (( $? == 0 )); then
            notify-send "Chromium build finished!"
        else
            notify-send "Chromium build failed!"
        fi
    }

    build_important () {
        build --important $@
    }

    OLD_PS1="$PS1"
    export PS1="[CHROMIUM - \u@\h \W]\\$ "

    OLD_PATH="$PATH"
    export PATH="$(realpath "$(dirname "${BASH_SOURCE[0]}")/.path"):$PATH:$(realpath "$(dirname "${BASH_SOURCE[0]}")/../depot_tools"):$(realpath "$(dirname "${BASH_SOURCE[0]}")/src/third_party/blink/tools")"

    goma_ctl ensure_start

else
    echo "Please run \". '${0}'\" instead."
fi