From: Yilei "Dolee" Yang Date: Tue, 19 Jul 2022 21:26:11 +0000 (-0700) Subject: Fix the handling of `# fmt: skip` when it's at a colon line (#3148) X-Git-Url: https://git.madduck.net/etc/vim.git/commitdiff_plain/6ea4eddf936e88c24a6757c0c858812d5ca1a9c6 Fix the handling of `# fmt: skip` when it's at a colon line (#3148) When the Leaf node with `# fmt: skip` is a NEWLINE inside a `suite` Node, the nodes to ignore should be from the siblings of the parent `suite` Node. There is a also a special case for the ASYNC token, where it expands to the grandparent Node where the ASYNC token is. This fixes GH-2646, GH-3126, GH-2680, GH-2421, GH-2339, and GH-2138. --- diff --git a/CHANGES.md b/CHANGES.md index 8543a8d..90c62de 100644 --- a/CHANGES.md +++ b/CHANGES.md @@ -10,6 +10,7 @@ +- Fix incorrect handling of `# fmt: skip` on colon `:` lines. (#3148) - Comments are no longer deleted when a line had spaces removed around power operators (#2874) diff --git a/src/black/comments.py b/src/black/comments.py index 23bf87f..522c1a7 100644 --- a/src/black/comments.py +++ b/src/black/comments.py @@ -9,7 +9,7 @@ if sys.version_info >= (3, 8): else: from typing_extensions import Final -from blib2to3.pytree import Node, Leaf +from blib2to3.pytree import Node, Leaf, type_repr from blib2to3.pgen2 import token from black.nodes import first_leaf_column, preceding_leaf, container_of @@ -174,6 +174,11 @@ def convert_one_fmt_off_pair(node: Node, *, preview: bool) -> bool: first.prefix = prefix[comment.consumed :] if comment.value in FMT_SKIP: first.prefix = "" + standalone_comment_prefix = prefix + else: + standalone_comment_prefix = ( + prefix[:previous_consumed] + "\n" * comment.newlines + ) hidden_value = "".join(str(n) for n in ignored_nodes) if comment.value in FMT_OFF: hidden_value = comment.value + "\n" + hidden_value @@ -195,7 +200,7 @@ def convert_one_fmt_off_pair(node: Node, *, preview: bool) -> bool: Leaf( STANDALONE_COMMENT, hidden_value, - prefix=prefix[:previous_consumed] + "\n" * comment.newlines, + prefix=standalone_comment_prefix, ), ) return True @@ -211,26 +216,10 @@ def generate_ignored_nodes( If comment is skip, returns leaf only. Stops at the end of the block. """ - container: Optional[LN] = container_of(leaf) if comment.value in FMT_SKIP: - prev_sibling = leaf.prev_sibling - # Need to properly format the leaf prefix to compare it to comment.value, - # which is also formatted - comments = list_comments(leaf.prefix, is_endmarker=False, preview=preview) - if comments and comment.value == comments[0].value and prev_sibling is not None: - leaf.prefix = "" - siblings = [prev_sibling] - while ( - "\n" not in prev_sibling.prefix - and prev_sibling.prev_sibling is not None - ): - prev_sibling = prev_sibling.prev_sibling - siblings.insert(0, prev_sibling) - for sibling in siblings: - yield sibling - elif leaf.parent is not None: - yield leaf.parent + yield from _generate_ignored_nodes_from_fmt_skip(leaf, comment, preview=preview) return + container: Optional[LN] = container_of(leaf) while container is not None and container.type != token.ENDMARKER: if is_fmt_on(container, preview=preview): return @@ -246,6 +235,51 @@ def generate_ignored_nodes( container = container.next_sibling +def _generate_ignored_nodes_from_fmt_skip( + leaf: Leaf, comment: ProtoComment, *, preview: bool +) -> Iterator[LN]: + """Generate all leaves that should be ignored by the `# fmt: skip` from `leaf`.""" + prev_sibling = leaf.prev_sibling + parent = leaf.parent + # Need to properly format the leaf prefix to compare it to comment.value, + # which is also formatted + comments = list_comments(leaf.prefix, is_endmarker=False, preview=preview) + if not comments or comment.value != comments[0].value: + return + if prev_sibling is not None: + leaf.prefix = "" + siblings = [prev_sibling] + while "\n" not in prev_sibling.prefix and prev_sibling.prev_sibling is not None: + prev_sibling = prev_sibling.prev_sibling + siblings.insert(0, prev_sibling) + for sibling in siblings: + yield sibling + elif ( + parent is not None + and type_repr(parent.type) == "suite" + and leaf.type == token.NEWLINE + ): + # The `# fmt: skip` is on the colon line of the if/while/def/class/... + # statements. The ignored nodes should be previous siblings of the + # parent suite node. + leaf.prefix = "" + ignored_nodes: List[LN] = [] + parent_sibling = parent.prev_sibling + while parent_sibling is not None and type_repr(parent_sibling.type) != "suite": + ignored_nodes.insert(0, parent_sibling) + parent_sibling = parent_sibling.prev_sibling + # Special case for `async_stmt` where the ASYNC token is on the + # grandparent node. + grandparent = parent.parent + if ( + grandparent is not None + and grandparent.prev_sibling is not None + and grandparent.prev_sibling.type == token.ASYNC + ): + ignored_nodes.insert(0, grandparent.prev_sibling) + yield from iter(ignored_nodes) + + def is_fmt_on(container: LN, preview: bool) -> bool: """Determine whether formatting is switched on within a container. Determined by whether the last `# fmt:` comment is `on` or `off`. diff --git a/src/black/linegen.py b/src/black/linegen.py index 1f132b7..8e8d41e 100644 --- a/src/black/linegen.py +++ b/src/black/linegen.py @@ -220,7 +220,9 @@ class LineGenerator(Visitor[Line]): for child in children: yield from self.visit(child) - if child.type == token.ASYNC: + if child.type == token.ASYNC or child.type == STANDALONE_COMMENT: + # STANDALONE_COMMENT happens when `# fmt: skip` is applied on the async + # line. break internal_stmt = next(children) diff --git a/tests/data/simple_cases/fmtskip8.py b/tests/data/simple_cases/fmtskip8.py new file mode 100644 index 0000000..38e9c2a --- /dev/null +++ b/tests/data/simple_cases/fmtskip8.py @@ -0,0 +1,62 @@ +# Make sure a leading comment is not removed. +def some_func( unformatted, args ): # fmt: skip + print("I am some_func") + return 0 + # Make sure this comment is not removed. + + +# Make sure a leading comment is not removed. +async def some_async_func( unformatted, args): # fmt: skip + print("I am some_async_func") + await asyncio.sleep(1) + + +# Make sure a leading comment is not removed. +class SomeClass( Unformatted, SuperClasses ): # fmt: skip + def some_method( self, unformatted, args ): # fmt: skip + print("I am some_method") + return 0 + + async def some_async_method( self, unformatted, args ): # fmt: skip + print("I am some_async_method") + await asyncio.sleep(1) + + +# Make sure a leading comment is not removed. +if unformatted_call( args ): # fmt: skip + print("First branch") + # Make sure this is not removed. +elif another_unformatted_call( args ): # fmt: skip + print("Second branch") +else : # fmt: skip + print("Last branch") + + +while some_condition( unformatted, args ): # fmt: skip + print("Do something") + + +for i in some_iter( unformatted, args ): # fmt: skip + print("Do something") + + +async def test_async_for(): + async for i in some_async_iter( unformatted, args ): # fmt: skip + print("Do something") + + +try : # fmt: skip + some_call() +except UnformattedError as ex: # fmt: skip + handle_exception() +finally : # fmt: skip + finally_call() + + +with give_me_context( unformatted, args ): # fmt: skip + print("Do something") + + +async def test_async_with(): + async with give_me_async_context( unformatted, args ): # fmt: skip + print("Do something")