[PATCH] completion: use native ZSH array pattern matching

["Marco Trevisan via GitGitGadget" <gitgitgadget@gmail.com>]

From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>

When clearing the builtin operations on re-sourcing in the ZSH case we
can use the native ${parameters} associative array keys values to get
the currently `__gitcomp_builtin_*` operations using pattern matching
instead of using sed.

As also stated in commit 94408dc7, introducing this change the usage of
sed has some overhead implications, while ZSH can do this check just
using its native syntax.

Signed-off-by: Marco Trevisan (Treviño) <mail@3v1n0.net>
---
    completion: Use native ZSH array pattern matching
    
    When clearing the builtin operations on re-sourcing in the ZSH case we
    can use the native ${parameters} associative array keys values to get
    the currently __gitcomp_builtin_* operations using pattern matching
    instead of using sed.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-645%2F3v1n0%2Fzsh-native-operation-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-645/3v1n0/zsh-native-operation-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/645

 contrib/completion/git-completion.bash | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 70ad04e1b2a..ad6934a3864 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -373,7 +373,7 @@ __gitcomp ()
 # Clear the variables caching builtins' options when (re-)sourcing
 # the completion script.
 if [[ -n ${ZSH_VERSION-} ]]; then
-	unset $(set |sed -ne 's/^\(__gitcomp_builtin_[a-zA-Z0-9_][a-zA-Z0-9_]*\)=.*/\1/p') 2>/dev/null
+	unset ${(M)${(k)parameters[@]}:#__gitcomp_builtin_*} 2>/dev/null
 else
 	unset $(compgen -v __gitcomp_builtin_)
 fi

base-commit: d2ecc46c0981fb829fdfb204604ed0a2798cbe07
-- 
gitgitgadget