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, 97 deletions

diff --git a/tests/bytecode/pylib-tests/macurl2path.py b/tests/bytecode/pylib-tests/macurl2path.py
deleted file mode 100644
index f22fb207b..000000000
--- a/tests/bytecode/pylib-tests/macurl2path.py
+++ /dev/null
@@ -1,97 +0,0 @@
-"""Macintosh-specific module for conversion between pathnames and URLs.
-
-Do not import directly; use urllib instead."""
-
-import urllib.parse
-import os
-
-__all__ = ["url2pathname","pathname2url"]
-
-def url2pathname(pathname):
-    """OS-specific conversion from a relative URL of the 'file' scheme
-    to a file system path; not recommended for general use."""
-    #
-    # XXXX The .. handling should be fixed...
-    #
-    tp = urllib.parse.splittype(pathname)[0]
-    if tp and tp != 'file':
-        raise RuntimeError('Cannot convert non-local URL to pathname')
-    # Turn starting /// into /, an empty hostname means current host
-    if pathname[:3] == '///':
-        pathname = pathname[2:]
-    elif pathname[:2] == '//':
-        raise RuntimeError('Cannot convert non-local URL to pathname')
-    components = pathname.split('/')
-    # Remove . and embedded ..
-    i = 0
-    while i < len(components):
-        if components[i] == '.':
-            del components[i]
-        elif components[i] == '..' and i > 0 and \
-                                  components[i-1] not in ('', '..'):
-            del components[i-1:i+1]
-            i = i-1
-        elif components[i] == '' and i > 0 and components[i-1] != '':
-            del components[i]
-        else:
-            i = i+1
-    if not components[0]:
-        # Absolute unix path, don't start with colon
-        rv = ':'.join(components[1:])
-    else:
-        # relative unix path, start with colon. First replace
-        # leading .. by empty strings (giving ::file)
-        i = 0
-        while i < len(components) and components[i] == '..':
-            components[i] = ''
-            i = i + 1
-        rv = ':' + ':'.join(components)
-    # and finally unquote slashes and other funny characters
-    return urllib.parse.unquote(rv)
-
-def pathname2url(pathname):
-    """OS-specific conversion from a file system path to a relative URL
-    of the 'file' scheme; not recommended for general use."""
-    if '/' in pathname:
-        raise RuntimeError("Cannot convert pathname containing slashes")
-    components = pathname.split(':')
-    # Remove empty first and/or last component
-    if components[0] == '':
-        del components[0]
-    if components[-1] == '':
-        del components[-1]
-    # Replace empty string ('::') by .. (will result in '/../' later)
-    for i in range(len(components)):
-        if components[i] == '':
-            components[i] = '..'
-    # Truncate names longer than 31 bytes
-    components = map(_pncomp2url, components)
-
-    if os.path.isabs(pathname):
-        return '/' + '/'.join(components)
-    else:
-        return '/'.join(components)
-
-def _pncomp2url(component):
-    # We want to quote slashes
-    return urllib.parse.quote(component[:31], safe='')
-
-def test():
-    for url in ["index.html",
-                "bar/index.html",
-                "/foo/bar/index.html",
-                "/foo/bar/",
-                "/"]:
-        print('%r -> %r' % (url, url2pathname(url)))
-    for path in ["drive:",
-                 "drive:dir:",
-                 "drive:dir:file",
-                 "drive:file",
-                 "file",
-                 ":file",
-                 ":dir:",
-                 ":dir:file"]:
-        print('%r -> %r' % (path, pathname2url(path)))
-
-if __name__ == '__main__':
-    test()