[PATCHv2 1/2] completion: add __git_config_get_set_variables() to get config variables

[Stephen Boyd <bebarino@gmail.com>]

This function retrieves the set configuration variables from the
appropriate configuration file. For example, if the user has previously
specified --global only the global variables are returned. The same
applies for --system, and --file. If no location has been specified, all
set variables are returned.

Signed-off-by: Stephen Boyd <bebarino@gmail.com>
---
 contrib/completion/git-completion.bash |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 1683e6d..e73359c 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1322,6 +1322,35 @@ _git_send_email ()
 	COMPREPLY=()
 }
 
+__git_config_get_set_variables ()
+{
+	local prevword word config_file= c=$COMP_CWORD
+	while [ $c -gt 1 ]; do
+		word="${COMP_WORDS[c]}"
+		case "$word" in
+		--global|--system|--file=*)
+			config_file="$word"
+			break
+			;;
+		-f|--file)
+			config_file="$word $prevword"
+			break
+			;;
+		esac
+		prevword=$word
+		c=$((--c))
+	done
+
+	for i in $(git --git-dir="$(__gitdir)" config $config_file --list \
+			2>/dev/null); do
+		case "$i" in
+		*.*)
+			echo "${i/=*/}"
+			;;
+		esac
+	done
+}
+
 _git_config ()
 {
 	local cur="${COMP_WORDS[COMP_CWORD]}"
-- 
1.6.3