fix(porcelain): apply config overrides before resolving the blueprint

[mustafab0]

Dimos.run() resolved the target first and applied the instance's config overrides second.

Resolving a blueprint name imports its module, and blueprints settle the arm-versus-sim split at import time, SIMULATED = bool(global_config.simulation) at module scope, so Dimos(simulation="mujoco").run("xarm-grasp") captured the default, composed the hardware stack, and then tried to reach an xArm and a RealSense that are not attached.

Found by greptile on #3873, which added the tenth such blueprint. The cause is here, not there.

[codecov]

❌ 7 Tests Failed:

Tests completed	Failed	Passed	Skipped
5428	7	5421	103

View the full list of 7 ❄️ flaky test(s)

dimos.experimental.memory.test_rust_recorder_e2e::test_cli_recording_uses_existing_binary_for_both_formats[mcap]

Flake rate in main: 33.33% (Passed 6 times, Failed 3 times)

Stack Traces | 0s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 299
errpipe_write = 300
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'....../Users/ec2-user/.local.../uv/python/nix', b'/...l/uv/0.12.12/aarch64/nix', b'....../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', b'.../homebrew/sbin/nix', ...)
fds_to_keep = {300}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 18660
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.experimental.memory.test_rust_recorder_e2e::test_cli_recording_uses_existing_binary_for_both_formats[sqlite]

Flake rate in main: 33.33% (Passed 6 times, Failed 3 times)

Stack Traces | 0s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 299
errpipe_write = 300
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'....../Users/ec2-user/.local.../uv/python/nix', b'/...l/uv/0.12.12/aarch64/nix', b'....../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', b'.../homebrew/sbin/nix', ...)
fds_to_keep = {300}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 18660
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.experimental.memory.test_rust_recorder_e2e::test_rust_artifact_is_readable_by_python_memory2[mcap]

Flake rate in main: 33.33% (Passed 6 times, Failed 3 times)

Stack Traces | 0s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 299
errpipe_write = 300
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'....../Users/ec2-user/.local.../uv/python/nix', b'/...l/uv/0.12.12/aarch64/nix', b'....../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', b'.../homebrew/sbin/nix', ...)
fds_to_keep = {300}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 18660
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.experimental.memory.test_rust_recorder_e2e::test_rust_artifact_is_readable_by_python_memory2[sqlite]

Flake rate in main: 33.33% (Passed 6 times, Failed 3 times)

Stack Traces | 0.018s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 299
errpipe_write = 300
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'....../Users/ec2-user/.local.../uv/python/nix', b'/...l/uv/0.12.12/aarch64/nix', b'....../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', b'.../homebrew/sbin/nix', ...)
fds_to_keep = {300}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 18660
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.experimental.memory.test_rust_recorder_e2e::test_tf_records_over_zenoh_and_replays_through_python

Flake rate in main: 33.33% (Passed 6 times, Failed 3 times)

Stack Traces | 0s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 299
errpipe_write = 300
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'....../Users/ec2-user/.local.../uv/python/nix', b'/...l/uv/0.12.12/aarch64/nix', b'....../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', b'.../homebrew/sbin/nix', ...)
fds_to_keep = {300}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 18660
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.hardware.whole_body.dual_openyam_damiao.test_adapter::test_adapter_connects_complete_dual_yam_topology

Flake rate in main: 33.33% (Passed 6 times, Failed 3 times)

Stack Traces | 0.001s run time

mocker = <pytest_mock.plugin.MockerFixture object at 0x3b1824f20>

    @pytest.fixture
    def adapter(mocker: MockerFixture) -> Iterator[DualOpenYamDamiaoAdapter]:
>       mocker.patch.object(can_motor_control, "SocketCanBus", can_motor_control.MockCanBus)

mocker     = <pytest_mock.plugin.MockerFixture object at 0x3b1824f20>

.../whole_body/dual_openyam_damiao/test_adapter.py:32: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
.venv/lib/python3.12....../site-packages/pytest_mock/plugin.py:294: in object
    return self._start_patch(
        attribute  = 'SocketCanBus'
        autospec   = None
        create     = False
        kwargs     = {}
        new        = <class 'can_motor_control.MockCanBus'>
        new_callable = None
        self       = <pytest_mock.plugin.MockerFixture._Patcher object at 0x3b1824e30>
        spec       = None
        spec_set   = None
        target     = <module 'can_motor_control' from '.../dimos/dimos/.venv/lib/python3.12............/site-packages/can_motor_control/__init__.py'>
.venv/lib/python3.12....../site-packages/pytest_mock/plugin.py:263: in _start_patch
    mocked: MockType = p.start()
        args       = (<module 'can_motor_control' from '.../dimos/dimos/.venv/lib/python3.12............/site-packages/can_motor_control/__init__.py'>, 'SocketCanBus')
        kwargs     = {'autospec': None, 'create': False, 'new': <class 'can_motor_control.MockCanBus'>, 'new_callable': None, ...}
        mock_func  = <function _patch_object at 0x10339b2e0>
        p          = <unittest.mock._patch object at 0x3b1824d70>
        self       = <pytest_mock.plugin.MockerFixture._Patcher object at 0x3b1824e30>
        warn_on_mock_enter = True
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/unittest/mock.py:1624: in start
    result = self.__enter__()
        self       = <unittest.mock._patch object at 0x3b1824d70>
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/unittest/mock.py:1467: in __enter__
    original, local = self.get_original()
        autospec   = None
        kwargs     = {}
        new        = <class 'can_motor_control.MockCanBus'>
        new_callable = None
        self       = <unittest.mock._patch object at 0x3b1824d70>
        spec       = None
        spec_set   = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <unittest.mock._patch object at 0x3b1824d70>

    def get_original(self):
        target = self.getter()
        name = self.attribute
    
        original = DEFAULT
        local = False
    
        try:
            original = target.__dict__[name]
        except (AttributeError, KeyError):
            original = getattr(target, name, DEFAULT)
        else:
            local = True
    
        if name in _builtins and isinstance(target, ModuleType):
            self.create = True
    
        if not self.create and original is DEFAULT:
>           raise AttributeError(
                "%s does not have the attribute %r" % (target, name)
            )
E           AttributeError: <module 'can_motor_control' from '.../dimos/dimos/.venv/lib/python3.12............/site-packages/can_motor_control/__init__.py'> does not have the attribute 'SocketCanBus'

local      = False
name       = 'SocketCanBus'
original   = sentinel.DEFAULT
self       = <unittest.mock._patch object at 0x3b1824d70>
target     = <module 'can_motor_control' from '.../dimos/dimos/.venv/lib/python3.12............/site-packages/can_motor_control/__init__.py'>

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/unittest/mock.py:1437: AttributeError

dimos.hardware.whole_body.openarm_damiao.test_adapter::test_openarm_feedback_limits_match_urdf_joint_limits

Flake rate in main: 33.33% (Passed 6 times, Failed 3 times)

Stack Traces | 0.001s run time

mocker = <pytest_mock.plugin.MockerFixture object at 0x3b176f7d0>

    @pytest.fixture
    def openarm_adapter(mocker: MockerFixture) -> Iterator[OpenArmDamiaoAdapter]:
>       mocker.patch.object(can_motor_control, "SocketCanBus", can_motor_control.MockCanBus)

mocker     = <pytest_mock.plugin.MockerFixture object at 0x3b176f7d0>

.../whole_body/openarm_damiao/test_adapter.py:33: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
.venv/lib/python3.12....../site-packages/pytest_mock/plugin.py:294: in object
    return self._start_patch(
        attribute  = 'SocketCanBus'
        autospec   = None
        create     = False
        kwargs     = {}
        new        = <class 'can_motor_control.MockCanBus'>
        new_callable = None
        self       = <pytest_mock.plugin.MockerFixture._Patcher object at 0x3b176f860>
        spec       = None
        spec_set   = None
        target     = <module 'can_motor_control' from '.../dimos/dimos/.venv/lib/python3.12............/site-packages/can_motor_control/__init__.py'>
.venv/lib/python3.12....../site-packages/pytest_mock/plugin.py:263: in _start_patch
    mocked: MockType = p.start()
        args       = (<module 'can_motor_control' from '.../dimos/dimos/.venv/lib/python3.12............/site-packages/can_motor_control/__init__.py'>, 'SocketCanBus')
        kwargs     = {'autospec': None, 'create': False, 'new': <class 'can_motor_control.MockCanBus'>, 'new_callable': None, ...}
        mock_func  = <function _patch_object at 0x10339b2e0>
        p          = <unittest.mock._patch object at 0x3b176f830>
        self       = <pytest_mock.plugin.MockerFixture._Patcher object at 0x3b176f860>
        warn_on_mock_enter = True
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/unittest/mock.py:1624: in start
    result = self.__enter__()
        self       = <unittest.mock._patch object at 0x3b176f830>
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/unittest/mock.py:1467: in __enter__
    original, local = self.get_original()
        autospec   = None
        kwargs     = {}
        new        = <class 'can_motor_control.MockCanBus'>
        new_callable = None
        self       = <unittest.mock._patch object at 0x3b176f830>
        spec       = None
        spec_set   = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <unittest.mock._patch object at 0x3b176f830>

    def get_original(self):
        target = self.getter()
        name = self.attribute
    
        original = DEFAULT
        local = False
    
        try:
            original = target.__dict__[name]
        except (AttributeError, KeyError):
            original = getattr(target, name, DEFAULT)
        else:
            local = True
    
        if name in _builtins and isinstance(target, ModuleType):
            self.create = True
    
        if not self.create and original is DEFAULT:
>           raise AttributeError(
                "%s does not have the attribute %r" % (target, name)
            )
E           AttributeError: <module 'can_motor_control' from '.../dimos/dimos/.venv/lib/python3.12............/site-packages/can_motor_control/__init__.py'> does not have the attribute 'SocketCanBus'

local      = False
name       = 'SocketCanBus'
original   = sentinel.DEFAULT
self       = <unittest.mock._patch object at 0x3b176f830>
target     = <module 'can_motor_control' from '.../dimos/dimos/.venv/lib/python3.12............/site-packages/can_motor_control/__init__.py'>

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/unittest/mock.py:1437: AttributeError

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[greptile-apps]

Greptile Summary

Moves porcelain configuration overrides ahead of target resolution so first-time blueprint imports observe the requested simulation mode.

• Updates Dimos.run() ordering before coordinator construction.
• Adds a regression test confirming the resolver sees the override.
• The runtime path still needs failure rollback and handling for already-imported blueprint modules.

Confidence Score: 3/5

The PR is not yet safe to merge because failed resolution can leak process-wide configuration and cached blueprint modules can preserve the wrong hardware/simulation composition.

The reordered mutation fixes first imports, but it introduces persistent state changes when resolution fails and leaves the reported behavior broken when the target module was previously imported under another configuration.

Files Needing Attention: dimos/porcelain/dimos.py, dimos/porcelain/test_dimos.py

Important Files Changed

Filename	Overview
dimos/porcelain/dimos.py	Reorders global configuration mutation before blueprint resolution, but leaves stale global state after resolution failures and cannot change import-time choices in cached modules.
dimos/porcelain/test_dimos.py	Covers first-time resolution ordering but not failed-resolution rollback or repeated runs using an already-imported blueprint.

_{Reviews (1): Last reviewed commit: "fix(porcelain): apply config overrides b..." | Re-trigger Greptile}