comparison tests/test-issue6642.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

  o  0 a file_adds: [a], file_mods: [], file_dels: [], files: [a]
  

  $ hg log -r . --debug | grep files
  [1]
  $ hg log -r . --debug -T json | egrep '(added|removed|modified)'
    "added": [],
    "modified": [],
    "removed": [],
  $ hg log -r . --debug -T xml | grep path
  <paths>

50725:7e5be4a7cda7

  o  0 a file_adds: [a], file_mods: [], file_dels: [], files: [a]
  

  $ hg log -r . --debug | grep files
  [1]
  $ hg log -r . --debug -T json | grep -E '(added|removed|modified)'
    "added": [],
    "modified": [],
    "removed": [],
  $ hg log -r . --debug -T xml | grep path
  <paths>