unix-cpy: Remove unix-cpy. It's no longer needed.

unix-cpy was originally written to get semantic equivalent with CPython
without writing functional tests.  When writing the initial
implementation of uPy it was a long way between lexer and functional
tests, so the half-way test was to make sure that the bytecode was
correct.  The idea was that if the uPy bytecode matched CPython 1-1 then
uPy would be proper Python if the bytecodes acted correctly.  And having
matching bytecode meant that it was less likely to miss some deep
subtlety in the Python semantics that would require an architectural
change later on.

But that is all history and it no longer makes sense to retain the
ability to output CPython bytecode, because:

1. It outputs CPython 3.3 compatible bytecode.  CPython's bytecode
changes from version to version, and seems to have changed quite a bit
in 3.5.  There's no point in changing the bytecode output to match
CPython anymore.

2. uPy and CPy do different optimisations to the bytecode which makes it
harder to match.

3. The bytecode tests are not run.  They were never part of Travis and
are not run locally anymore.

4. The EMIT_CPYTHON option needs a lot of extra source code which adds
heaps of noise, especially in compile.c.

5. Now that there is an extensive test suite (which tests functionality)
there is no need to match the bytecode.  Some very subtle behaviour is
tested with the test suite and passing these tests is a much better
way to stay Python-language compliant, rather than trying to match
CPy bytecode.

1 files changed, 0 insertions, 180 deletions

diff --git a/tests/bytecode/pylib-tests/pty.py b/tests/bytecode/pylib-tests/pty.py
deleted file mode 100644
index 3ccf61989..000000000
--- a/tests/bytecode/pylib-tests/pty.py
+++ /dev/null
@@ -1,180 +0,0 @@
-"""Pseudo terminal utilities."""
-
-# Bugs: No signal handling.  Doesn't set slave termios and window size.
-#       Only tested on Linux.
-# See:  W. Richard Stevens. 1992.  Advanced Programming in the
-#       UNIX Environment.  Chapter 19.
-# Author: Steen Lumholt -- with additions by Guido.
-
-from select import select
-import os
-import tty
-
-__all__ = ["openpty","fork","spawn"]
-
-STDIN_FILENO = 0
-STDOUT_FILENO = 1
-STDERR_FILENO = 2
-
-CHILD = 0
-
-def openpty():
-    """openpty() -> (master_fd, slave_fd)
-    Open a pty master/slave pair, using os.openpty() if possible."""
-
-    try:
-        return os.openpty()
-    except (AttributeError, OSError):
-        pass
-    master_fd, slave_name = _open_terminal()
-    slave_fd = slave_open(slave_name)
-    return master_fd, slave_fd
-
-def master_open():
-    """master_open() -> (master_fd, slave_name)
-    Open a pty master and return the fd, and the filename of the slave end.
-    Deprecated, use openpty() instead."""
-
-    try:
-        master_fd, slave_fd = os.openpty()
-    except (AttributeError, OSError):
-        pass
-    else:
-        slave_name = os.ttyname(slave_fd)
-        os.close(slave_fd)
-        return master_fd, slave_name
-
-    return _open_terminal()
-
-def _open_terminal():
-    """Open pty master and return (master_fd, tty_name).
-    SGI and generic BSD version, for when openpty() fails."""
-    try:
-        import sgi
-    except ImportError:
-        pass
-    else:
-        try:
-            tty_name, master_fd = sgi._getpty(os.O_RDWR, 0o666, 0)
-        except IOError as msg:
-            raise os.error(msg)
-        return master_fd, tty_name
-    for x in 'pqrstuvwxyzPQRST':
-        for y in '0123456789abcdef':
-            pty_name = '/dev/pty' + x + y
-            try:
-                fd = os.open(pty_name, os.O_RDWR)
-            except os.error:
-                continue
-            return (fd, '/dev/tty' + x + y)
-    raise os.error('out of pty devices')
-
-def slave_open(tty_name):
-    """slave_open(tty_name) -> slave_fd
-    Open the pty slave and acquire the controlling terminal, returning
-    opened filedescriptor.
-    Deprecated, use openpty() instead."""
-
-    result = os.open(tty_name, os.O_RDWR)
-    try:
-        from fcntl import ioctl, I_PUSH
-    except ImportError:
-        return result
-    try:
-        ioctl(result, I_PUSH, "ptem")
-        ioctl(result, I_PUSH, "ldterm")
-    except IOError:
-        pass
-    return result
-
-def fork():
-    """fork() -> (pid, master_fd)
-    Fork and make the child a session leader with a controlling terminal."""
-
-    try:
-        pid, fd = os.forkpty()
-    except (AttributeError, OSError):
-        pass
-    else:
-        if pid == CHILD:
-            try:
-                os.setsid()
-            except OSError:
-                # os.forkpty() already set us session leader
-                pass
-        return pid, fd
-
-    master_fd, slave_fd = openpty()
-    pid = os.fork()
-    if pid == CHILD:
-        # Establish a new session.
-        os.setsid()
-        os.close(master_fd)
-
-        # Slave becomes stdin/stdout/stderr of child.
-        os.dup2(slave_fd, STDIN_FILENO)
-        os.dup2(slave_fd, STDOUT_FILENO)
-        os.dup2(slave_fd, STDERR_FILENO)
-        if (slave_fd > STDERR_FILENO):
-            os.close (slave_fd)
-
-        # Explicitly open the tty to make it become a controlling tty.
-        tmp_fd = os.open(os.ttyname(STDOUT_FILENO), os.O_RDWR)
-        os.close(tmp_fd)
-    else:
-        os.close(slave_fd)
-
-    # Parent and child process.
-    return pid, master_fd
-
-def _writen(fd, data):
-    """Write all the data to a descriptor."""
-    while data:
-        n = os.write(fd, data)
-        data = data[n:]
-
-def _read(fd):
-    """Default read function."""
-    return os.read(fd, 1024)
-
-def _copy(master_fd, master_read=_read, stdin_read=_read):
-    """Parent copy loop.
-    Copies
-            pty master -> standard output   (master_read)
-            standard input -> pty master    (stdin_read)"""
-    fds = [master_fd, STDIN_FILENO]
-    while True:
-        rfds, wfds, xfds = select(fds, [], [])
-        if master_fd in rfds:
-            data = master_read(master_fd)
-            if not data:  # Reached EOF.
-                fds.remove(master_fd)
-            else:
-                os.write(STDOUT_FILENO, data)
-        if STDIN_FILENO in rfds:
-            data = stdin_read(STDIN_FILENO)
-            if not data:
-                fds.remove(STDIN_FILENO)
-            else:
-                _writen(master_fd, data)
-
-def spawn(argv, master_read=_read, stdin_read=_read):
-    """Create a spawned process."""
-    if type(argv) == type(''):
-        argv = (argv,)
-    pid, master_fd = fork()
-    if pid == CHILD:
-        os.execlp(argv[0], *argv)
-    try:
-        mode = tty.tcgetattr(STDIN_FILENO)
-        tty.setraw(STDIN_FILENO)
-        restore = 1
-    except tty.error:    # This is the same as termios.error
-        restore = 0
-    try:
-        _copy(master_fd, master_read, stdin_read)
-    except (IOError, OSError):
-        if restore:
-            tty.tcsetattr(STDIN_FILENO, tty.TCSAFLUSH, mode)
-
-    os.close(master_fd)