riscv/qemu - qemu - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
John Snow	b2b31fdf9b	qapi/source: Remove line number from QAPISourceInfo initializer With the QAPISourceInfo(None, None, None) construct gone, there's no longer any reason to have to specify that a file starts on the first line. Remove it from the initializer and default it to 1. Remove the last vestiges where we check for 'line' being unset, that can't happen, now. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210519183951.3946870-4-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>	5 years ago
John Snow	3404e57410	qapi/parser: Don't try to handle file errors Fixes: `f5d4361cda` Fixes: `52a474180a` Fixes: `46f49468c6` Remove the try/except block that handles file-opening errors in QAPISchemaParser.__init__() and add one each to QAPISchemaParser._include() and QAPISchema.__init__() respectively. This simultaneously fixes the typing of info.fname (`f5d4361cda`), A static typing violation in test-qapi (`46f49468c6`), and a regression of an error message (`52a474180a`). The short-ish version of what motivates this patch is: - It's hard to write a good error message in the init method, because we need to determine the context of our caller to do so. It's easier to just let the caller write the message. - We don't want to allow QAPISourceInfo(None, None, None) to exist. The typing introduced by commit `f5d4361cda` types the 'fname' field as (non-optional) str, which was premature until the removal of this construct. - Errors made using such an object are currently incorrect (since `52a474180a`) - It's not technically a semantic error if we cannot open the schema. - There are various typing constraints that make mixing these two cases undesirable for a single special case. - test-qapi's code handling an fname of 'None' is now dead, drop it. Additionally, Not all QAPIError objects have an 'info' field (since `46f49468`), so deleting this stanza corrects a typing oversight in test-qapi introduced by that commit. Other considerations: - open() is moved to a 'with' block to ensure file pointers are cleaned up deterministically. - Python 3.3 deprecated IOError and made it a synonym for OSError. Avoid the misleading perception these exception handlers are narrower than they really are. The long version: The error message here is incorrect (since commit `52a474180a`): > python3 qapi-gen.py 'fake.json' qapi-gen.py: qapi-gen.py: can't read schema file 'fake.json': No such file or directory In pursuing it, we find that QAPISourceInfo has a special accommodation for when there's no filename. Meanwhile, the intent when QAPISourceInfo was typed (`f5d4361cda`) was non-optional 'str'. This usage was overlooked. To remove this, I'd want to avoid having a "fake" QAPISourceInfo object. I also don't want to explicitly begin accommodating QAPISourceInfo itself being None, because we actually want to eventually prove that this can never happen -- We don't want to confuse "The file isn't open yet" with "This error stems from a definition that wasn't defined in any file". (An earlier series tried to create a dummy info object, but it was tough to prove in review that it worked correctly without creating new regressions. This patch avoids that distraction. We would like to first prove that we never raise QAPISemError for any built-in object before we add "special" info objects. We aren't ready to do that yet.) So, which way out of the labyrinth? Here's one way: Don't try to handle errors at a level with "mixed" semantic contexts; i.e. don't mix inclusion errors (should report a source line where the include was triggered) and command line errors (where we specified a file we couldn't read). Remove the error handling from the initializer of the parser. Pythonic! Now it's the caller's job to figure out what to do about it. Handle the error in QAPISchemaParser._include() instead, where we can write a targeted error message where we are guaranteed to have an 'info' context to report with. The root level error can similarly move to QAPISchema.__init__(), where we know we'll never have an info context to report with, so we use a more abstract error type. Now the error looks sensible again: > python3 qapi-gen.py 'fake.json' qapi-gen.py: can't read schema file 'fake.json': No such file or directory With these error cases separated, QAPISourceInfo can be solidified as never having placeholder arguments that violate our desired types. Clean up test-qapi along similar lines. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210519183951.3946870-2-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>	5 years ago
Markus Armbruster	05ebf841ef	qapi: Enforce command naming rules Command names should be lower-case. Enforce this. Fix the fixable offenders (all in tests/), and add the remainder to pragma command-name-exceptions. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210323094025.3569441-25-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>	5 years ago
Markus Armbruster	b86df37478	qapi: Rename pragma -whitelist to -exceptions Rename pragma returns-whitelist to command-returns-exceptions, and name-case-whitelist to member-name-case-exceptions. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210323094025.3569441-20-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>	5 years ago
John Snow	96670e89ec	qapi/source.py: delint with pylint Shush an error and leave a hint for future cleanups when we're allowed to use Python 3.7+. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20201009161558.107041-26-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>	6 years ago
John Snow	f5d4361cda	qapi/source.py: add type hint annotations Annotations do not change runtime behavior. This commit only adds annotations. A note on typing of __init__: mypy requires init functions with no parameters to document a return type of None to be considered fully typed. In the case when there are input parameters, None may be omitted. Since __init__ may never return any value, it is preferred to omit the return annotation whenever possible. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20201009161558.107041-25-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>	6 years ago
Markus Armbruster	baa310f1bb	qapi: Inheriting from object is pointless with Python 3, drop Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200304155932.20452-2-armbru@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>	6 years ago
Markus Armbruster	e6c42b96b9	qapi: Split up scripts/qapi/common.py The QAPI code generator clocks in at some 3100 SLOC in 8 source files. Almost 60% of the code is in qapi/common.py. Split it into more focused modules: * Move QAPISchemaPragma and QAPISourceInfo to qapi/source.py. * Move QAPIError and its sub-classes to qapi/error.py. * Move QAPISchemaParser and QAPIDoc to parser.py. Use the opportunity to put QAPISchemaParser first. * Move check_expr() & friends to qapi/expr.py. Use the opportunity to put the code into a more sensible order. * Move QAPISchema & friends to qapi/schema.py * Move QAPIGen and its sub-classes, ifcontext, QAPISchemaModularCVisitor, and QAPISchemaModularCVisitor to qapi/gen.py * Delete camel_case(), it's unused since commit `e98859a9b9` "qapi: Clean up after recent conversions to QAPISchemaVisitor" A number of helper functions remain in qapi/common.py. I considered moving the code generator helpers to qapi/gen.py, but decided not to. Perhaps we should rewrite them as methods of QAPIGen some day. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20191018074345.24034-7-armbru@redhat.com> [Add "# -- coding: utf-8 --" lines]	7 years ago