[PATCH] completion: fix incorrect bash/zsh string equality check

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From: Robert Estelle <robertestelle@xxxxxxxxx>

In the basic `[`/`test` command, the string equality operator is a
single `=`. The `==` operator is only available in `[[`, which is a
bash-ism also supported by zsh.

This mix-up was causing the following completion error in zsh:
> __git_ls_files_helper:7: = not found

(That message refers to the extraneous symbol in `==` ← `=`).

This updates that comparison to use the extended `[[ … ]]` conditional
for consistency with the other checks in this file.

Signed-off-by: Robert Estelle <robertestelle@xxxxxxxxx>
---
    completion: Fix incorrect bash/zsh string equality check
    
    This fixes an error in contrib/completion/git-completion.bash caused by
    the incorrect use of == (vs. single =) inside a basic [/test command.
    Double-equals == should only be used with the extended [[ comparison.
    
    This was causing the following completion error in zsh:
    
    > __git_ls_files_helper:7: = not found
    
    
    That message refers to the extraneous = symbol in ==.
    
    This updates that comparison to use the extended [[ … ]] conditional for
    consistency with the other checks in this file.
    
    Note that there may be some contributing cause to this error related to
    emulation mode inheritance/stickiness, since it seems that the function
    is intended to run with emulate ksh and that does not appear to be
    happening properly. Nevertheless, fixing this comparison fixes this
    particular error in a compatible way, and I have not observed any other
    errors.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1096%2Frwe%2Ffix-completion-sh-eq-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1096/rwe/fix-completion-sh-eq-v1
Pull-Request: https://github.com/git/git/pull/1096

 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 4bdd27ddc87..14de5efa734 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -515,7 +515,7 @@ __gitcomp_file ()
 # argument, and using the options specified in the second argument.
 __git_ls_files_helper ()
 {
-	if [ "$2" == "--committable" ]; then
+	if [[ "$2" == "--committable" ]]; then
 		__git -C "$1" -c core.quotePath=false diff-index \
 			--name-only --relative HEAD -- "${3//\\/\\\\}*"
 	else

base-commit: 225bc32a989d7a22fa6addafd4ce7dcd04675dbf
-- 
gitgitgadget



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