comparison tests/test-hook.t @ 50725:7e5be4a7cda7 stable

tests: use grep -E instead of obsolescent egrep

Testing on Fedora 38 failed with:
  egrep: warning: egrep is obsolescent; using grep -E

The warning comes from
https://git.savannah.gnu.org/cgit/grep.git/commit/?id=a9515624709865d480e3142fd959bccd1c9372d1
. For further anecdotal evidence of the change, see
https://www.phoronix.com/news/GNU-Grep-3.8-Stop-egrep-fgrep .

This reverses the code check that goes back to e7d3b509af8b. grep -E is POSIX,
but there is a risk that it doesn't work the same on all platforms - especially
older Unix versions. It should however always be possible to put a GNU grep in
$PATH before running the tests.

50724:a10d823a8e3d

  searching for changes
  abort: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed
  (run with --traceback for stack trace)
  [255]

  $ hg pull ../a --traceback 2>&1 | egrep 'pulling|searching|^exception|Traceback|SyntaxError|ImportError|ModuleNotFoundError|HookLoadError|abort'
  pulling from ../a
  searching for changes
  exception from first failed import attempt:
  Traceback (most recent call last):
  SyntaxError: * (glob)

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'precommit.importfail = python:importfail.whatever' >> .hg/hgrc

  $ echo a >> a
  $ hg --traceback commit -ma 2>&1 | egrep '^exception|ImportError|ModuleNotFoundError|Traceback|HookLoadError|abort'
  exception from first failed import attempt:
  Traceback (most recent call last):
  ModuleNotFoundError: No module named 'somebogusmodule'
  exception from second failed import attempt:
  Traceback (most recent call last):

50725:7e5be4a7cda7

  searching for changes
  abort: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed
  (run with --traceback for stack trace)
  [255]

  $ hg pull ../a --traceback 2>&1 | grep -E 'pulling|searching|^exception|Traceback|SyntaxError|ImportError|ModuleNotFoundError|HookLoadError|abort'
  pulling from ../a
  searching for changes
  exception from first failed import attempt:
  Traceback (most recent call last):
  SyntaxError: * (glob)

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'precommit.importfail = python:importfail.whatever' >> .hg/hgrc

  $ echo a >> a
  $ hg --traceback commit -ma 2>&1 | grep -E '^exception|ImportError|ModuleNotFoundError|Traceback|HookLoadError|abort'
  exception from first failed import attempt:
  Traceback (most recent call last):
  ModuleNotFoundError: No module named 'somebogusmodule'
  exception from second failed import attempt:
  Traceback (most recent call last):