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tests: write commit message using file I/O...
tests: write commit message using file I/O Python 2.7 will print() \x94\x5c\x0a whereas Python 3 will print() \xc2\x94\x5c\x0a. Why, I'm not sure. It probably has to do with print() being Unicode aware on Python 3 and Python attempting some kind of encoding before emitting the output. This difference results in a different bytes making it to the commit message and the JSON output varying. We work around this by writing bytes to a commit message file. Differential Revision: https://phab.mercurial-scm.org/D5741
Gregory Szorc -
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How to add fuzzers (partially cribbed from oss-fuzz[0]):

  1. git clone https://github.com/google/oss-fuzz
  2. cd oss-fuzz
  3. python infra/helper.py build_image mercurial
  4. docker run --cap-add=SYS_PTRACE -it -v $HG_REPO_PATH:/hg-new
    gcr.io/oss-fuzz/mercurial bash
  5. cd /src
  6. rm -r mercurial
  7. ln -s /hg-new mercurial
  8. cd mercurial
  9. compile
  10. ls $OUT

Step 9 is literally running the command "compile", which is part of the docker container. Once you have that working, you can build the fuzzers like this (in the oss-fuzz repo):

python infra/helper.py build_fuzzers --sanitizer address mercurial $HG_REPO_PATH

(you can also say "memory", "undefined" or "coverage" for sanitizer). Then run the built fuzzers like this:

python infra/helper.py run_fuzzer mercurial -- $FUZZER

0: https://github.com/google/oss-fuzz/blob/master/docs/new_project_guide.md