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8fba9523cf
Fix a race condition in "make regen-all" when make -jN option is used to run jobs in parallel. The clinic.py script now only use atomic write to write files. Moveover, generated files are now left unchanged if the content does not change, to not change the file modification time. The "make regen-all" command runs "make clinic" and "make regen-importlib" targets: * "make regen-importlib" builds object files (ex: Modules/_weakref.o) from source files (ex: Modules/_weakref.c) and clinic files (ex: Modules/clinic/_weakref.c.h) * "make clinic" always rewrites all clinic files (ex: Modules/clinic/_weakref.c.h) Since there is no dependency between "clinic" and "regen-importlib" Makefile targets, these two targets can be run in parallel. Moreover, half of clinic.py file writes are not atomic and so there is a race condition when "make regen-all" runs jobs in parallel using make -jN option (which can be passed in MAKEFLAGS environment variable). Fix clinic.py to make all file writes atomic: * Add write_file() function to ensure that all file writes are atomic: write into a temporary file and then use os.replace(). * Moreover, write_file() doesn't recreate or modify the file if the content does not change to avoid modifying the file modification file. * Update test_clinic to verify these assertions with a functional test. * Remove Clinic.force attribute which was no longer used, whereas Clinic.verify remains useful. |
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| .. | ||
| buildbot | ||
| c-analyzer | ||
| ccbench | ||
| clinic | ||
| demo | ||
| freeze | ||
| gdb | ||
| i18n | ||
| importbench | ||
| iobench | ||
| msi | ||
| nuget | ||
| peg_generator | ||
| pynche | ||
| scripts | ||
| ssl | ||
| stringbench | ||
| test2to3 | ||
| tz | ||
| unicode | ||
| unittestgui | ||
| README | ||
This directory contains a number of Python programs that are useful
while building or extending Python.
buildbot Batchfiles for running on Windows buildbot workers.
ccbench A Python threads-based concurrency benchmark. (*)
demo Several Python programming demos.
freeze Create a stand-alone executable from a Python program.
gdb Python code to be run inside gdb, to make it easier to
debug Python itself (by David Malcolm).
i18n Tools for internationalization. pygettext.py
parses Python source code and generates .pot files,
and msgfmt.py generates a binary message catalog
from a catalog in text format.
iobench Benchmark for the new Python I/O system. (*)
msi Support for packaging Python as an MSI package on Windows.
parser Un-parsing tool to generate code from an AST.
peg_generator PEG-based parser generator (pegen) used for new parser.
pynche A Tkinter-based color editor.
scripts A number of useful single-file programs, e.g. tabnanny.py
by Tim Peters, which checks for inconsistent mixing of
tabs and spaces, and 2to3, which converts Python 2 code
to Python 3 code.
stringbench A suite of micro-benchmarks for various operations on
strings (both 8-bit and unicode). (*)
test2to3 A demonstration of how to use 2to3 transparently in setup.py.
unicode Tools for generating unicodedata and codecs from unicode.org
and other mapping files (by Fredrik Lundh, Marc-Andre Lemburg
and Martin von Loewis).
unittestgui A Tkinter based GUI test runner for unittest, with test
discovery.
(*) A generic benchmark suite is maintained separately at https://github.com/python/performance