comparison mercurial/__init__.py @ 43090:1f339b503a40

py3: manually import pycompat.delattr where it is needed

And with this change, we no longer need the auto-inserted import statement
in the source transformer, so it has been removed!

Differential Revision: https://phab.mercurial-scm.org/D7010

43089:c59eb1560c44

        its changes do not necessarily match the output token stream.

        REMEMBER TO CHANGE ``BYTECODEHEADER`` WHEN CHANGING THIS FUNCTION
        OR CACHED FILES WON'T GET INVALIDATED PROPERLY.
        """
        futureimpline = False

        # The following utility functions access the tokens list and i index of
        # the for i, t enumerate(tokens) loop below
        def _isop(j, *o):
            """Assert that tokens[j] is an OP with one of the given values"""
            try:

            st = tokens[j]
            if st.type == token.STRING and st.string.startswith(("'", '"')):
                tokens[j] = st._replace(string='u%s' % st.string)

        for i, t in enumerate(tokens):
            # Insert compatibility imports at "from __future__ import" line.
            # No '\n' should be added to preserve line numbers.
            if (
                t.type == token.NAME
                and t.string == 'import'
                and all(u.type == token.NAME for u in tokens[i - 2 : i])
                and [u.string for u in tokens[i - 2 : i]]
                == ['from', '__future__']
            ):
                futureimpline = True
            if t.type == token.NEWLINE and futureimpline:
                futureimpline = False
                if fullname == 'mercurial.pycompat':
                    yield t
                    continue
                r, c = t.start
                l = (
                    b'; from mercurial.pycompat import '
                    b'delattr\n'
                )
                for u in tokenize.tokenize(io.BytesIO(l).readline):
                    if u.type in (tokenize.ENCODING, token.ENDMARKER):
                        continue
                    yield u._replace(
                        start=(r, c + u.start[1]), end=(r, c + u.end[1])
                    )
                continue

            # This looks like a function call.
            if t.type == token.NAME and _isop(i + 1, '('):
                fn = t.string

                # *attr() builtins don't accept byte strings to 2nd argument.

    # Header to add to bytecode files. This MUST be changed when
    # ``replacetoken`` or any mechanism that changes semantics of module
    # loading is changed. Otherwise cached bytecode may get loaded without
    # the new transformation mechanisms applied.
    BYTECODEHEADER = b'HG\x00\x11'

    class hgloader(importlib.machinery.SourceFileLoader):
        """Custom module loader that transforms source code.

        When the source code is converted to a code object, we transform

43090:1f339b503a40

        its changes do not necessarily match the output token stream.

        REMEMBER TO CHANGE ``BYTECODEHEADER`` WHEN CHANGING THIS FUNCTION
        OR CACHED FILES WON'T GET INVALIDATED PROPERLY.
        """
        # The following utility functions access the tokens list and i index of
        # the for i, t enumerate(tokens) loop below
        def _isop(j, *o):
            """Assert that tokens[j] is an OP with one of the given values"""
            try:

            st = tokens[j]
            if st.type == token.STRING and st.string.startswith(("'", '"')):
                tokens[j] = st._replace(string='u%s' % st.string)

        for i, t in enumerate(tokens):
            # This looks like a function call.
            if t.type == token.NAME and _isop(i + 1, '('):
                fn = t.string

                # *attr() builtins don't accept byte strings to 2nd argument.

    # Header to add to bytecode files. This MUST be changed when
    # ``replacetoken`` or any mechanism that changes semantics of module
    # loading is changed. Otherwise cached bytecode may get loaded without
    # the new transformation mechanisms applied.
    BYTECODEHEADER = b'HG\x00\x12'

    class hgloader(importlib.machinery.SourceFileLoader):
        """Custom module loader that transforms source code.

        When the source code is converted to a code object, we transform