[PATCH 0/7] completion: fix expansion issues with compgen

["SZEDER Gábor" <szeder@ira.uka.de>]

This series fixes the expansion issues with compgen reported by Jeroen
Meijer a while ago in

  http://article.gmane.org/gmane.comp.version-control.git/201596

The problem is that the compgen Bash-builtin performs expansion on all
words in the wordlist given to its -W option, breaking Git's completion
script when e.g. refs or filenames contain expandable substrings.  Since
compgen has no option to turn off this expansion and we only use a small
subset of compgen's functionality, this series replaces compgen in
__gitcomp() and __gitcomp_nl() by some shell logic and a small awk script,
respectively.

Patches 1 and 2 are test enhancements and fixes, while 3 and 4 add new
tests to make sure I don't break anything and to demonstrate the issues,
respectively.  The actual bugfixes are in patches 5 and 6.  Finally, patch
7 is a cleanup made possible by patch 6 (could be squashed into 6).

In the future we might want/need to fill COMPREPLY directly when
completing a path in the <tree>:<path> notation instead using
__gitcomp_nl() there, because paths can contain newlines, too.

Compared to Felipe's series from yesterday, this series has more tests,
more descriptive commit messages, and it's faster.  However, it doesn't
include his 1/5 (completion: get rid of empty COMPREPLY assignments).


Footnote: check the patchlist below, and notice how format-patch put
patches 4 and 5 into the same line.

SZEDER Gábor (7):
  completion: make the 'basic' test more tester-friendly
  completion: fix args of run_completion() test helper
  completion: add tests for the __gitcomp_nl() completion helper
    function
  completion: add tests for invalid variable name among completion words  completion: fix expansion issues in __gitcomp_nl()
  completion: fix expansion issue in __gitcomp()
  completion: remove the now unused __gitcomp_1() internal helper
    function

 contrib/completion/git-completion.bash |  57 ++++++++-------
 t/t9902-completion.sh                  | 123 ++++++++++++++++++++++++++++++---
 2 files changed, 147 insertions(+), 33 deletions(-)

-- 
1.8.0.220.g4d14ece