[PATCH 10/12] completion: add new git_complete helper

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This simplifies the completions, and makes it easier to define aliases:

 git_complete gf git_fetch

Signed-off-by: Felipe Contreras <felipe.contreras@xxxxxxxxx>
---
 contrib/completion/git-completion.bash |   69 +++++++++++++++-----------------
 t/t9902-completion.sh                  |    2 +-
 2 files changed, 33 insertions(+), 38 deletions(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 60ea224..6cf1d98 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2616,21 +2616,6 @@ _git ()
 {
 	local i c=1 cmd cmd_pos __git_dir
 
-	if [[ -n ${ZSH_VERSION-} ]]; then
-		emulate -L bash
-		setopt KSH_TYPESET
-
-		# workaround zsh's bug that leaves 'words' as a special
-		# variable in versions < 4.3.12
-		typeset -h words
-
-		# workaround zsh's bug that quotes spaces in the COMPREPLY
-		# array if IFS doesn't contain spaces.
-		typeset -h IFS
-	fi
-
-	local cur words cword prev
-	_get_comp_words_by_ref -n =: cur words cword prev
 	while [ $c -lt $cword ]; do
 		i="${words[c]}"
 		case "$i" in
@@ -2683,22 +2668,6 @@ _git ()
 
 _gitk ()
 {
-	if [[ -n ${ZSH_VERSION-} ]]; then
-		emulate -L bash
-		setopt KSH_TYPESET
-
-		# workaround zsh's bug that leaves 'words' as a special
-		# variable in versions < 4.3.12
-		typeset -h words
-
-		# workaround zsh's bug that quotes spaces in the COMPREPLY
-		# array if IFS doesn't contain spaces.
-		typeset -h IFS
-	fi
-
-	local cur words cword prev
-	_get_comp_words_by_ref -n =: cur words cword prev
-
 	__git_has_doubledash && return
 
 	local g="$(__gitdir)"
@@ -2719,16 +2688,42 @@ _gitk ()
 	__git_complete_revlist
 }
 
-complete -o bashdefault -o default -o nospace -F _git git 2>/dev/null \
-	|| complete -o default -o nospace -F _git git
-complete -o bashdefault -o default -o nospace -F _gitk gitk 2>/dev/null \
-	|| complete -o default -o nospace -F _gitk gitk
+foo_wrap ()
+{
+	local cmd=foo_cmd cmd_pos=1
+	if [[ -n ${ZSH_VERSION-} ]]; then
+		emulate -L bash
+		setopt KSH_TYPESET
+
+		# workaround zsh's bug that leaves 'words' as a special
+		# variable in versions < 4.3.12
+		typeset -h words
+
+		# workaround zsh's bug that quotes spaces in the COMPREPLY
+		# array if IFS doesn't contain spaces.
+		typeset -h IFS
+	fi
+	local cur words cword prev
+	_get_comp_words_by_ref -n =: cur words cword prev
+	foo "$@"
+}
+
+git_complete ()
+{
+	local name="${2-$1}"
+	local cmd="${name#git_}"
+	eval "$(typeset -f foo_wrap | sed -e "s/foo_cmd/$cmd/" -e "s/foo/_$name/")"
+	complete -o bashdefault -o default -o nospace -F _${name}_wrap $1 2>/dev/null \
+		|| complete -o default -o nospace -F _${name}_wrap $1
+}
+
+git_complete git
+git_complete gitk
 
 # The following are necessary only for Cygwin, and only are needed
 # when the user has tab-completed the executable name and consequently
 # included the '.exe' suffix.
 #
 if [ Cygwin = "$(uname -o 2>/dev/null)" ]; then
-complete -o bashdefault -o default -o nospace -F _git git.exe 2>/dev/null \
-	|| complete -o default -o nospace -F _git git.exe
+git_complete git.exe git
 fi
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index b99fb88..7b87f4c 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -58,7 +58,7 @@ test_completion ()
 	_words=( $1 )
 	test $# -gt 1 && echo "$2" > expected
 	(( _cword = ${#_words[@]} - 1 ))
-	_git && print_comp &&
+	_git_wrap && print_comp &&
 	test_cmp expected out
 }
 
-- 
1.7.10.3.g5a738d

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