completion: factor out _git_xxx calling code

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 2e30950299fd74a8f11b0cea86d6d8ffb6ca3226..4aaec3cd40d767608ee170069b9fb6aecfd82f0c 100644 (file)
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -29,6 +29,8 @@
 # tell the completion to use commit completion.  This also works with aliases
 # of form "!sh -c '...'".  For example, "!sh -c ': git commit ; ... '".
 #
+# Compatible with bash 3.2.57.
+#
 # You can set the following environment variables to influence the behavior of
 # the completion routines:
 #
@@ -280,6 +282,10 @@ __gitcomp ()
        esac
 }
 
+# Clear the variables caching builtins' options when (re-)sourcing
+# the completion script.
+unset $(set |sed -ne 's/^\(__gitcomp_builtin_[a-zA-Z0-9_][a-zA-Z0-9_]*\)=.*/\1/p') 2>/dev/null
+
 # This function is equivalent to
 #
 #    __gitcomp "$(git xxx --git-completion-helper) ..."
@@ -3029,6 +3035,17 @@ _git_worktree ()
        fi
 }
 
+__git_complete_command () {
+       local command="$1"
+       local completion_func="_git_${command//-/_}"
+       if declare -f $completion_func >/dev/null 2>/dev/null; then
+               $completion_func
+               return 0
+       else
+               return 1
+       fi
+}
+
 __git_main ()
 {
        local i c=1 command __git_dir __git_repo_path
@@ -3088,14 +3105,12 @@ __git_main ()
                return
        fi
 
-       local completion_func="_git_${command//-/_}"
-       declare -f $completion_func >/dev/null 2>/dev/null && $completion_func && return
+       __git_complete_command "$command" && return
 
        local expansion=$(__git_aliased_command "$command")
        if [ -n "$expansion" ]; then
                words[1]=$expansion
-               completion_func="_git_${expansion//-/_}"
-               declare -f $completion_func >/dev/null 2>/dev/null && $completion_func
+               __git_complete_command "$expansion"
        fi
 }