fix: Remove english shell dependency in manage.sh script

[milouse]

The current manage.sh script checks its internal methods using:

[ $(command -V "$ACTION" | grep ' function$')" = "" ]

A problem occurs when your shell locale is not english. Mine is french for example and command -V update_packages will return:

update_packages est une fonction
update_packages ()
{
    pip install --upgrade pip;
    pip install --upgrade setuptools;
    pip install -r "$BASE_DIR/requirements.txt"
}

fonction being different than function, the script does not work at all.

This pull requests replace the command by a sed one, which expect than the internal method will all use the same syntax. That way, method check is now language independant. However, the sed check is very naive for now and would need improvement the day more methods (or "private" methods) will be added to the script.

[milouse]

rebased on master

[milouse]

Rebased on master

[codecov-io]

Codecov Report

Merging #1479 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1479      +/-   ##
==========================================
+ Coverage   72.33%   72.38%   +0.04%     
==========================================
  Files         108      108              
  Lines        6210     6210              
  Branches     1072     1072              
==========================================
+ Hits         4492     4495       +3     
+ Misses       1441     1438       -3     
  Partials      277      277

Impacted Files	Coverage Δ
searx/search.py	46.45% <0%> (+1.06%)	⬆️

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[return42]

Hi @milouse, please apologize the late response .. thanks for pointing out this bug! A more simpler solution might be:

LANG=C command -V ....

what do you think?

[milouse]

Effectivelly, it can be a more simple solution. I discover only recently the locale switch trick, that's why I didn't choose it initially. Feel free to use it instead!

[return42]

Thanks! .. and sorry for the delay :)