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This splits the scanner into two discrete steps, one that scans the
source files, and one that that reads in the dependency information and
produces a dyndep.
The scanner uses the JSON format from
https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1689r5.html,
which is the same format the MSVC and Clang use for C++ modules
scanning. This will allow us to more easily move to using MSVC and
clang-scan-deps when possible.
As an added bonus, this correctly tracks dependencies across TU and
Target boundaries, unlike the previous implementation, which assumed
that if it couldn't find a provider that everything was good, but could
run into issues. Because of that limitation Fortran code had to fully
depend on all of it's dependencies, transitive or not. Now, when using
the dep scanner, we can remove that restriction, allowing more
parallelism.
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This basically existed for an assert which we don't need, as mypy would
catch that issue for us anyway. Removing the function entirely has some
small performance advantages
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We already have to decide whether to scan a file at configure time, so
we don't want to have to do it again at compile time, every time the
depscan rule is run. We can do this by saving and passing the language
to use in the pickle, so depscan doesn't have to re-calculate it. As an
added bonus, this removes an import from depscan
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We don't need to write and pass two separate files to the depscanner,
I've used the pickle because the pickle serializer/deserializer should
be faster than JSON, thought I haven't tested.
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This replaces all of the Apache blurbs at the start of each file with an
`# SPDX-License-Identifier: Apache-2.0` string. It also fixes existing
uses to be consistent in capitalization, and to be placed above any
copyright notices.
This removes nearly 3000 lines of boilerplate from the project (only
python files), which no developer cares to look at.
SPDX is in common use, particularly in the Linux kernel, and is the
recommended format for Meson's own `project(license: )` field
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In commit 4ca9a16288f51cce99624a2ef595d879acdc02d8 we added unreliable
support (it warns you if you try it) for gcc-compatible treatment of
uppercase-C files being C++ instead of C. In order to handle it
correctly, we needed to evaluate can-compile by special-casing "C" to
avoid lowercasing it for comparisons.
This didn't cover all cases where we check if "C" is a C++ language
file. We also straight-up check the language of a file (rather than
working backwards to see if a C++ compiler can compile it) when doing
module scanning, and this needs to special-case "C" as well.
We also had one case where we only checked lowercase fortran extensions,
but not lowercase C++ extensions. While we are at it, use lowercase for
C++ as well, except the "C" special case.
Fixes #10629
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In Fortran and C++ all the bits we care about are in ASCII. 8-bit
characters can only occur in comments and string literals and we don't
parse those.
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These are only used for type checking, so don't bother importing them at
runtime.
Generally add future annotations at the same time, to make sure that
existing uses of these imports don't need to be quoted.
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discovered via flake8 --select E303
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All changes were created by running
"pyupgrade --py3-only"
and committing the results. Although this has been performed in the
past, newer versions of pyupgrade can automatically catch more
opportunities, notably list comprehensions can use generators instead,
in the following cases:
- unpacking into function arguments as function(*generator)
- unpacking into assignments of the form x, y = generator
- as the argument to some builtin functions such as min/max/sorted
Also catch a few creeping cases of new code added using older styles.
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We have a lot of these. Some of them are harmless, if unidiomatic, such
as `if (condition)`, others are potentially dangerous `assert(...)`, as
`assert(condtion)` works as expected, but `assert(condition, message)`
will result in an assertion that never triggers, as what you're actually
asserting is `bool(tuple[2])`, which will always be true.
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Currently, we write each file to the command line, but this can result in
situations where the number of files passed exceeds OS imposed command
line limits. For compilers, we solve this with response files. For
depscan I've chosen to use a JSON list instead. JSON has several
advantages in that it's standardized, there's a built-in python module
for it, and it's familiar. I've also chosen to always use the JSON file
instead of having a heuristic to decide between JSON and not JSON,
while there may be a small performance trade off here, keeping the
implementation simple with only one path is wort it.
Fixes #9129
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performed by running "pyupgrade --py36-plus" and committing the results
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Invalid escape sequences are deprecated and will be removed from a
future version of python. Use r"" to define them so they remain
readable.
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In Fortran it is common to use capital F in the suffix (eg. '.F90') if
the source file makes use of preprocessor statements. Such files should
probably be treated like all other fortran files by meson.
Case insensitivity for suffixes was already implemented several places
in meson before this. So most likely, the few places changed here were
oversights anyway.
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Signed-off-by: Antonin Décimo <antonin.decimo@gmail.com>
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