initial commit

Signed-off-by: Sean Cross <sean@xobs.io>

.gitmodules

@@ -0,0 +1,33 @@
+[submodule "deps/migen"]
+	path = deps/migen
+	url = https://github.com/m-labs/migen.git
+[submodule "deps/litex"]
+	path = deps/litex
+	url = https://github.com/enjoy-digital/litex.git
+[submodule "deps/litescope"]
+	path = deps/litescope
+	url = https://github.com/enjoy-digital/litescope.git
+[submodule "deps/pyserial"]
+	path = deps/pyserial
+	url = https://github.com/pyserial/pyserial.git
+[submodule "deps/liteeth"]
+	path = deps/liteeth
+	url = https://github.com/enjoy-digital/liteeth.git
+[submodule "deps/liteusb"]
+	path = deps/liteusb
+	url = https://github.com/enjoy-digital/liteusb.git
+[submodule "deps/litedram"]
+	path = deps/litedram
+	url = https://github.com/enjoy-digital/litedram.git
+[submodule "deps/litepcie"]
+	path = deps/litepcie
+	url = https://github.com/enjoy-digital/litepcie.git
+[submodule "deps/litesdcard"]
+	path = deps/litesdcard
+	url = https://github.com/enjoy-digital/litesdcard.git
+[submodule "deps/liteiclink"]
+	path = deps/liteiclink
+	url = https://github.com/enjoy-digital/liteiclink.git
+[submodule "deps/litevideo"]
+	path = deps/litevideo
+	url = https://github.com/enjoy-digital/litevideo.git

bin/litex_read_verilog

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+#!/usr/bin/env python3
+
+import sys
+import os
+
+# This script lives in the "bin" directory, but uses a helper script in the parent
+# directory.  Obtain the current path so we can get the absolute parent path.
+script_path = os.path.dirname(os.path.realpath(
+    __file__)) + os.path.sep + os.path.pardir + os.path.sep
+sys.path.insert(0, script_path)
+import lxbuildenv
+
+from litex.utils.litex_read_verilog import main
+main()

bin/litex_server

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+
+# This script lives in the "bin" directory, but uses a helper script in the parent
+# directory.  Obtain the current path so we can get the absolute parent path.
+script_path = os.path.dirname(os.path.realpath(
+    __file__)) + os.path.sep + os.path.pardir + os.path.sep
+sys.path.insert(0, script_path)
+import lxbuildenv
+
+from litex.utils.litex_server import main
+main()

bin/litex_sim

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+
+# This script lives in the "bin" directory, but uses a helper script in the parent
+# directory.  Obtain the current path so we can get the absolute parent path.
+script_path = os.path.dirname(os.path.realpath(
+    __file__)) + os.path.sep + os.path.pardir + os.path.sep
+sys.path.insert(0, script_path)
+import lxbuildenv
+
+from litex.utils.litex_sim import main
+main()

bin/litex_simple

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+
+# This script lives in the "bin" directory, but uses a helper script in the parent
+# directory.  Obtain the current path so we can get the absolute parent path.
+script_path = os.path.dirname(os.path.realpath(
+    __file__)) + os.path.sep + os.path.pardir + os.path.sep
+sys.path.insert(0, script_path)
+import lxbuildenv
+
+from litex.boards.targets.simple import main
+main()

bin/litex_term

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+
+# This script lives in the "bin" directory, but uses a helper script in the parent
+# directory.  Obtain the current path so we can get the absolute parent path.
+script_path = os.path.dirname(os.path.realpath(
+    __file__)) + os.path.sep + os.path.pardir + os.path.sep
+sys.path.insert(0, script_path)
+import lxbuildenv
+
+from litex.utils.litex_term import main
+main()

bin/mkmscimg

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+
+# This script lives in the "bin" directory, but uses a helper script in the parent
+# directory.  Obtain the current path so we can get the absolute parent path.
+script_path = os.path.dirname(os.path.realpath(
+    __file__)) + os.path.sep + os.path.pardir + os.path.sep
+sys.path.insert(0, script_path)
+import lxbuildenv
+
+from litex.soc.tools.mkmscimg import main
+main()

foboot-bitstream.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+# This variable defines all the external programs that this module
+# relies on.  lxbuildenv reads this variable in order to ensure
+# the build will finish without exiting due to missing third-party
+# programs.
+LX_DEPENDENCIES = ["riscv", "icestorm", "yosys"]
+
+# Import lxbuildenv to integrate the deps/ directory
+import lxbuildenv
+
+# Disable pylint's E1101, which breaks completely on migen
+#pylint:disable=E1101
+
+#from migen import *
+from litex.build.xilinx import VivadoProgrammer, XilinxPlatform
+from litex.build.generic_platform import Pins, IOStandard
+from litex.soc.integration import SoCSDRAM
+from litex.soc.integration.builder import Builder
+from litex.soc.integration.soc_core import csr_map_update
+
+_io = [
+    ("clk50", 0, Pins("J19"), IOStandard("LVCMOS33")),
+]
+
+class Platform(XilinxPlatform):
+    def __init__(self, toolchain="vivado", programmer="vivado", part="35"):
+        part = "xc7a" + part + "t-fgg484-2"
+    def create_programmer(self):
+        if self.programmer == "vivado":
+            return VivadoProgrammer(flash_part="n25q128-3.3v-spi-x1_x2_x4")
+        else:
+            raise ValueError("{} programmer is not supported"
+                             .format(self.programmer))
+
+    def do_finalize(self, fragment):
+        XilinxPlatform.do_finalize(self, fragment)
+
+class BaseSoC(SoCSDRAM):
+    csr_peripherals = [
+        "ddrphy",
+#        "dna",
+        "xadc",
+        "cpu_or_bridge",
+    ]
+    csr_map_update(SoCSDRAM.csr_map, csr_peripherals)
+
+    def __init__(self, platform, **kwargs):
+        # clk_freq = int(100e6)
+        self.integrated_main_ram_size = 8192
+        self.add_memory()
+
+def main():
+    platform = Platform()
+    soc = BaseSoC(platform)
+    builder = Builder(soc, output_dir="build", csr_csv="test/csr.csv")
+    vns = builder.build()
+    soc.do_exit(vns)
+
+if __name__ == "__main__":
+    main()

lxbuildenv.py

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+#!/usr/bin/env python3
+
+# This script enables easy, cross-platform building without the need
+# to install third-party Python modules.
+
+import sys
+import os
+import subprocess
+import argparse
+
+
+DEPS_DIR = "deps"
+
+DEFAULT_DEPS = {
+    'migen':        'https://github.com/m-labs/migen.git',
+    'litex':        'https://github.com/enjoy-digital/litex.git',
+    'litescope':    'https://github.com/enjoy-digital/litescope.git',
+    'pyserial':     'https://github.com/pyserial/pyserial.git',
+    'liteeth':      'https://github.com/enjoy-digital/liteeth.git',
+    'liteusb':      'https://github.com/enjoy-digital/liteusb.git',
+    'litedram':     'https://github.com/enjoy-digital/litedram.git',
+    'litepcie':     'https://github.com/enjoy-digital/litepcie.git',
+    'litesdcard':   'https://github.com/enjoy-digital/litesdcard.git',
+    'liteiclink':   'https://github.com/enjoy-digital/liteiclink.git',
+    'litevideo':    'https://github.com/enjoy-digital/litevideo.git',
+}
+
+# Obtain the path to this script, plus a trailing separator.  This will
+# be used later on to construct various environment variables for paths
+# to a variety of support directories.
+script_path = os.path.dirname(os.path.realpath(__file__)) + os.path.sep
+
+# Look through the specified file for known variables to get the dependency list
+def get_required_dependencies(filename):
+    import ast
+
+    # Always check the Python version
+    dependencies = {
+        'python': 1
+    }
+    main_src = ""
+
+    try:
+        with open(sys.argv[0], 'r') as f:
+            main_src = f.read()
+        main_ast = ast.parse(main_src, filename=filename)
+    except:
+        return list(dependencies.keys())
+
+    # Iterate through the top-level nodes looking for variables named
+    # LX_DEPENDENCIES or LX_DEPENDENCY and get the values that are
+    # assigned to them.
+    for node in ast.iter_child_nodes(main_ast):
+        if isinstance(node, ast.Assign):
+            value = node.value
+            for target in node.targets:
+                if isinstance(target, ast.Name):
+                    if target.id == "LX_DEPENDENCIES" or target.id == "LX_DEPENDENCY":
+                        if isinstance(value, (ast.List, ast.Tuple)):
+                            for elt in value.elts:
+                                if isinstance(elt, ast.Str):
+                                    dependencies[elt.s] = 1
+                        elif isinstance(value, ast.Str):
+                            dependencies[value.s] = 1
+
+    # Set up sub-dependencies
+    if 'riscv' in dependencies:
+        dependencies['make'] = 1
+    return list(dependencies.keys())
+
+def get_python_path(script_path, args):
+    # Python has no concept of a local dependency path, such as the C `-I``
+    # switch, or the nodejs `node_modules` path, or the rust cargo registry.
+    # Instead, it relies on an environment variable to append to the search
+    # path.
+    # Construct this variable by adding each subdirectory under the `deps/`
+    # directory to the PYTHONPATH environment variable.
+    python_path = []
+    if os.path.isdir(script_path + DEPS_DIR):
+        for dep in os.listdir(script_path + DEPS_DIR):
+            dep = script_path + DEPS_DIR + os.path.sep + dep
+            if os.path.isdir(dep):
+                python_path.append(dep)
+    return python_path
+
+def fixup_env(script_path, args):
+    os.environ["PYTHONPATH"] = os.pathsep.join(get_python_path(script_path, 0))
+
+    # Set the "LXBUILDENV_REEXEC" variable to prevent the script from continuously
+    # reinvoking itself.
+    os.environ["LXBUILDENV_REEXEC"] = "1"
+
+    # Python randomizes the order in which it traverses hashes, and Migen uses
+    # hashes an awful lot when bringing together modules.  As such, the order
+    # in which Migen generates its output Verilog will change with every run,
+    # and the addresses for various modules will change.
+    # Make builds deterministic so that the generated Verilog code won't change
+    # across runs.
+    os.environ["PYTHONHASHSEED"] = "1"
+
+    # Some Makefiles are invoked as part of the build process, and those Makefiles
+    # occasionally have calls to Python.  Ensure those Makefiles use the same
+    # interpreter that this script is using.
+    os.environ["PYTHON"] = sys.executable
+
+    # Set the environment variable "V" to 1.  This causes Makefiles to print
+    # the commands they run, which makes them easier to debug.
+    if "lx_verbose" in args and args.lx_verbose:
+        os.environ["V"] = "1"
+
+    # If the user just wanted to print the environment variables, do that and quit.
+    if args.lx_print_env:
+        print("PYTHONPATH={}".format(os.environ["PYTHONPATH"]))
+        print("PYTHONHASHSEED={}".format(os.environ["PYTHONHASHSEED"]))
+        print("PYTHON={}".format(sys.executable))
+        print("LXBUILDENV_REEXEC={}".format(os.environ["LXBUILDENV_REEXEC"]))
+
+        sys.exit(0)
+
+# Equivalent to the powershell Get-Command, and kinda like `which`
+def get_command(cmd):
+    if os.name == 'nt':
+        path_ext = os.environ["PATHEXT"].split(os.pathsep)
+    else:
+        path_ext = [""]
+    for ext in path_ext:
+        for path in os.environ["PATH"].split(os.pathsep):
+
+            if os.path.exists(path + os.path.sep + cmd + ext):
+                return path + os.path.sep + cmd + ext
+    return None
+
+def check_python_version(args):
+    import platform
+    # Litex / Migen require Python 3.5 or newer.  Ensure we're running
+    # under a compatible version of Python.
+    if sys.version_info[:3] < (3, 5):
+        return (False,
+            "python: You need Python 3.5+ (version {} found)".format(sys.version_info[:3]))
+    return (True, "python 3.5+: ok (Python {} found)".format(platform.python_version()))
+
+def check_vivado(args):
+    vivado_path = get_command("vivado")
+    if vivado_path == None:
+        # Look for the default Vivado install directory
+        if os.name == 'nt':
+            base_dir = r"C:\Xilinx\Vivado"
+        else:
+            base_dir = "/opt/Xilinx/Vivado"
+        if os.path.exists(base_dir):
+            for file in os.listdir(base_dir):
+                bin_dir = base_dir + os.path.sep + file + os.path.sep + "bin"
+                if os.path.exists(bin_dir + os.path.sep + "vivado"):
+                    os.environ["PATH"] += os.pathsep + bin_dir
+                    vivado_path = bin_dir
+                    break
+    if vivado_path == None:
+        return (False, "toolchain not found in your PATH", "download it from https://www.xilinx.com/support/download.html")
+    return (True, "found at {}".format(vivado_path))
+
+def check_cmd(args, cmd, name=None, fix=None):
+    if name is None:
+        name = cmd
+    path = get_command(cmd)
+    if path == None:
+        return (False, name + " not found in your PATH", fix)
+    return (True, "found at {}".format(path))
+
+def check_make(args):
+    return check_cmd(args, "make", "GNU Make")
+
+def check_riscv(args):
+    return check_cmd(args, "riscv64-unknown-elf-gcc", "riscv toolchain", "download it from https://www.sifive.com/products/tools/")
+
+def check_yosys(args):
+    return check_cmd(args, "yosys")
+
+def check_arachne(args):
+    return check_cmd(args, "arachne-pnr")
+
+dependency_checkers = {
+    'python': check_python_version,
+    'vivado': check_vivado,
+    'make': check_make,
+    'riscv': check_riscv,
+    'yosys': check_yosys,
+    'arachne-pnr': check_arachne,
+}
+
+# Validate that the required dependencies (Vivado, compilers, etc.)
+# have been installed.
+def check_dependencies(args, dependency_list):
+
+    dependency_errors = 0
+    for dependency_name in dependency_list:
+        if not dependency_name in dependency_checkers:
+            print('WARNING: Unrecognized dependency "{}"'.format(dependency_name))
+            continue
+        result = dependency_checkers[dependency_name](args)
+        if result[0] == False:
+            if len(result) > 2:
+                print('{}: {} -- {}'.format(dependency_name, result[1], result[2]))
+            else:
+                print('{}: {}'.format(dependency_name, result[1]))
+            dependency_errors = dependency_errors + 1
+
+        elif args.lx_check_deps or args.lx_verbose:
+            print('dependency: {}: {}'.format(dependency_name, result[1]))
+    if dependency_errors > 0:
+        if args.lx_ignore_deps:
+            print('{} missing dependencies were found but continuing anyway'.format(dependency_errors))
+        else:
+            raise SystemExit(str(dependency_errors) +
+                             " missing dependencies were found")
+
+    if args.lx_check_deps:
+        sys.exit(0)
+
+# Return True if the given tree needs to be initialized
+def check_module_recursive(root_path, depth, verbose=False):
+    if verbose:
+        print('git-dep: checking if "{}" requires updating...'.format(root_path))
+    # If the directory isn't a valid git repo, initialization is required
+    if not os.path.exists(root_path + os.path.sep + '.git'):
+        return True
+
+    # If there are no submodules, no initialization needs to be done
+    if not os.path.isfile(root_path + os.path.sep + '.gitmodules'):
+        return False
+
+    # Loop through the gitmodules to check all submodules
+    gitmodules = open(root_path + os.path.sep + '.gitmodules', 'r')
+    for line in gitmodules:
+        parts = line.split("=", 2)
+        if parts[0].strip() == "path":
+            path = parts[1].strip()
+            if check_module_recursive(root_path + os.path.sep + path, depth + 1, verbose=verbose):
+                return True
+    return False
+
+# Determine whether we need to invoke "git submodules init --recurse"
+def check_submodules(script_path, args):
+    if check_module_recursive(script_path, 0, verbose=args.lx_verbose):
+        print("Missing submodules -- updating")
+        subprocess.Popen(["git", "submodule", "update",
+                          "--init", "--recursive"], cwd=script_path).wait()
+    elif args.lx_verbose:
+        print("Submodule check: Submodules found")
+
+
+def lx_git(cmd, *args):
+    import subprocess
+    git_cmd = ["git", cmd]
+    if args is not None:
+        for arg in args:
+            git_cmd = git_cmd + [arg]
+    subprocess.call(git_cmd)
+
+def lx_print_deps():
+    print('Known dependencies:')
+    for dep in dependency_checkers.keys():
+        print('    {}'.format(dep))
+    print('To define a dependency, add a variable inside {} at the top level called LX_DEPENDENCIES and assign it a list or tuple.'.format(sys.argv[0]))
+    print('For example:')
+    print('LX_DEPENDENCIES = ("riscv", "vivado")')
+
+
+def lx_main(args):
+    if args.lx_print_env:
+        fixup_env(script_path, args)
+
+    elif args.lx_print_deps:
+        lx_print_deps()
+
+    elif args.init:
+        if args.main is None:
+            main_name = os.getcwd().split(os.path.sep)[-1] + '.py'
+            new_main_name = input('What would you like your main program to be called? [' + main_name + '] ')
+            if new_main_name is not None and new_main_name != "":
+                main_name = new_main_name
+        else:
+            main_name = args.main
+        if not main_name.endswith('.py'):
+            main_name = main_name + '.py'
+
+        if args.no_git:
+            print("skipping git initialization")
+        else:
+            if not os.path.exists(DEPS_DIR):
+                os.mkdir(DEPS_DIR)
+
+            if not os.path.exists(".git"):
+                print("initializing git repository")
+                lx_git('init')
+            else:
+                print("using existing git repository")
+            lx_git('add', str(__file__))
+
+            for dep_name, dep_url in DEFAULT_DEPS.items():
+                dest_path = '{}{}{}'.format(DEPS_DIR, '/', dep_name)
+                if not os.path.exists(dest_path):
+                    lx_git('submodule', 'add', dep_url, dest_path)
+                    lx_git('add', dest_path)
+
+            lx_git('submodule', 'update', '--init', '--recursive')
+
+        if args.no_bin:
+            print("skipping bin/ initialization")
+        elif os.path.exists("bin"):
+            print("bin/ directory exists -- remove bin/ directory to re-initialize")
+        else:
+            bin_tools = {
+                'mkmscimg':           'litex.soc.tools.mkmscimg',
+                'litex_term':         'litex.utils.litex_term',
+                'litex_server':       'litex.utils.litex_server',
+                'litex_sim':          'litex.utils.litex_sim',
+                'litex_read_verilog': 'litex.utils.litex_read_verilog',
+                'litex_simple':       'litex.boards.targets.simple',
+            }
+            bin_template = """#!/usr/bin/env python3
+
+import sys
+import os
+
+# This script lives in the "bin" directory, but uses a helper script in the parent
+# directory.  Obtain the current path so we can get the absolute parent path.
+script_path = os.path.dirname(os.path.realpath(
+    __file__)) + os.path.sep + os.path.pardir + os.path.sep
+sys.path.insert(0, script_path)
+import lxbuildenv
+
+"""
+            print("Creating binaries")
+            os.mkdir("bin")
+            for bin_name, python_module in bin_tools.items():
+                with open('bin' + os.path.sep + bin_name, 'w') as new_bin:
+                    new_bin.write(bin_template)
+                    new_bin.write('from ' + python_module + ' import main\n')
+                    new_bin.write('main()\n')
+                import stat
+                os.chmod('bin' + os.path.sep + bin_name, stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
+                if not args.no_git:
+                    lx_git('add', '--chmod=+x', 'bin' + os.path.sep + bin_name)
+
+        if os.path.exists(main_name):
+            print("skipping creation of {}: file exists".format(main_name))
+        else:
+            print("creating main program {}".format(main_name))
+            with open(main_name, 'w') as m:
+                program_template = """#!/usr/bin/env python3
+# This variable defines all the external programs that this module
+# relies on.  lxbuildenv reads this variable in order to ensure
+# the build will finish without exiting due to missing third-party
+# programs.
+LX_DEPENDENCIES = ["riscv", "vivado"]
+
+# Import lxbuildenv to integrate the deps/ directory
+import lxbuildenv
+
+# Disable pylint's E1101, which breaks completely on migen
+#pylint:disable=E1101
+
+from migen import *
+from litex.build.generic_platform import *
+
+_io = [
+    ("clk50", 0, Pins("J19"), IOStandard("LVCMOS33")),
+]
+
+class Platform(XilinxPlatform):
+    def __init__(self, toolchain="vivado", programmer="vivado", part="35"):
+        part = "xc7a" + part + "t-fgg484-2"
+    def create_programmer(self):
+        if self.programmer == "vivado":
+            return VivadoProgrammer(flash_part="n25q128-3.3v-spi-x1_x2_x4")
+        else:
+            raise ValueError("{} programmer is not supported"
+                             .format(self.programmer))
+
+    def do_finalize(self, fragment):
+        XilinxPlatform.do_finalize(self, fragment)
+
+class BaseSoC(SoCSDRAM):
+    csr_peripherals = [
+        "ddrphy",
+#        "dna",
+        "xadc",
+        "cpu_or_bridge",
+    ]
+    csr_map_update(SoCSDRAM.csr_map, csr_peripherals)
+
+    def __init__(self, platform, **kwargs):
+        clk_freq = int(100e6)
+
+def main():
+    platform = Platform()
+    soc = BaseSoC(platform)
+    builder = Builder(soc, output_dir="build", csr_csv="test/csr.csv")
+    vns = builder.build()
+    soc.do_exit(vns)
+
+if __name__ == "__main__":
+    main()
+"""
+                m.write(program_template)
+                if not args.no_git:
+                    lx_git("add", main_name)
+    else:
+        return False
+    return True
+
+# For the main command, parse args and hand it off to main()
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Wrap Python code to enable quickstart",
+        add_help=False)
+    parser.add_argument(
+        "-h", "--help", '--lx-help', help="show this help message and exit", action="help"
+    )
+    parser.add_argument(
+        '-i', '--init', '--lx-init', help='initialize a new project', action="store_true"
+    )
+    parser.add_argument(
+        '-m', '--main', '--lx-main', help='name of main project'
+    )
+    parser.add_argument(
+        '--no-bin', '--lx-no-bin', help="don't create a bin/ directory"
+    )
+    parser.add_argument(
+        '--no-git', '--lx-no-git', help="Don't create a git repository"
+    )
+    parser.add_argument(
+        '-e', '--print-env', '--lx-print-env', dest="lx_print_env", help="print environment variable listing for pycharm, vscode, or bash", action="store_true"
+    )
+    parser.add_argument(
+        '-d', '--print-deps', '--lx-print-deps', dest="lx_print_deps", help="print all possible dependencies and then exit", action="store_true"
+    )
+    args = parser.parse_args()
+
+    if not lx_main(args):
+        parser.print_help()
+
+elif not os.path.isfile(sys.argv[0]):
+    print("lxbuildenv doesn't operate while in interactive mode")
+
+elif "LXBUILDENV_REEXEC" not in os.environ:
+    parser = argparse.ArgumentParser(
+        description="Wrap Python code to enable quickstart",
+        add_help=False)
+    parser.add_argument(
+        "--lx-verbose", help="increase verboseness of some processes", action="store_true"
+    )
+    parser.add_argument(
+        "--lx-print-env", help="print environment variable listing for pycharm, vscode, or bash", action="store_true"
+    )
+    parser.add_argument(
+        "--lx-check-deps", help="check build environment for dependencies such as compiler and fpga tools and then exit", action="store_true"
+    )
+    parser.add_argument(
+        "--lx-print-deps", help="print all possible dependencies and then exit", action="store_true"
+    )
+    parser.add_argument(
+        "--lx-help", action="help"
+    )
+    parser.add_argument(
+        "--lx-ignore-deps", help="try building even if dependencies are missing", action="store_true"
+    )
+    (args, rest) = parser.parse_known_args()
+
+    if args.lx_print_deps:
+        lx_print_deps()
+        sys.exit(0)
+
+    deps = get_required_dependencies(sys.argv[0])
+
+    fixup_env(script_path, args)
+    check_dependencies(args, deps)
+    check_submodules(script_path, args)
+
+    try:
+        sys.exit(subprocess.Popen(
+            [sys.executable] + [sys.argv[0]] + rest).wait())
+    except:
+        sys.exit(1)
+else:
+    # Overwrite the deps directory.
+    # Because we're running with a predefined PYTHONPATH, you'd think that
+    # the DEPS_DIR would be first.
+    # Unfortunately, setuptools causes the sitewide packages to take precedence
+    # over the PYTHONPATH variable.
+    # Work around this bug by inserting paths into the first index.
+    for path in get_python_path(script_path, None):
+        sys.path.insert(0, path)