Merge branch 'pb/complete-config'

The command line completion script (in contrib/) learned to
complete configuration variable names better.

* pb/complete-config:
  completion: add and use __git_compute_second_level_config_vars_for_section
  completion: add and use __git_compute_first_level_config_vars_for_section
  completion: complete 'submodule.*' config variables
  completion: add space after config variable names also in Bash 3

Author: gitster

contrib/completion/git-completion.bash

@@ -2660,6 +2660,31 @@ __git_compute_config_vars ()
 	__git_config_vars="$(git help --config-for-completion)"
 }
 
+__git_config_vars_all=
+__git_compute_config_vars_all ()
+{
+	test -n "$__git_config_vars_all" ||
+	__git_config_vars_all="$(git --no-pager help --config)"
+}
+
+__git_compute_first_level_config_vars_for_section ()
+{
+	local section="$1"
+	__git_compute_config_vars
+	local this_section="__git_first_level_config_vars_for_section_${section}"
+	test -n "${!this_section}" ||
+	printf -v "__git_first_level_config_vars_for_section_${section}" %s "$(echo "$__git_config_vars" | grep -E "^${section}\.[a-z]" | awk -F. '{print $2}')"
+}
+
+__git_compute_second_level_config_vars_for_section ()
+{
+	local section="$1"
+	__git_compute_config_vars_all
+	local this_section="__git_second_level_config_vars_for_section_${section}"
+	test -n "${!this_section}" ||
+	printf -v "__git_second_level_config_vars_for_section_${section}" %s "$(echo "$__git_config_vars_all" | grep -E "^${section}\.<" | awk -F. '{print $3}')"
+}
+
 __git_config_sections=
 __git_compute_config_sections ()
 {
@@ -2804,73 +2829,50 @@ __git_complete_config_variable_name ()
 	done
 
 	case "$cur_" in
-	branch.*.*)
+	branch.*.*|guitool.*.*|difftool.*.*|man.*.*|mergetool.*.*|remote.*.*|submodule.*.*|url.*.*)
 		local pfx="${cur_%.*}."
 		cur_="${cur_##*.}"
-		__gitcomp "remote pushRemote merge mergeOptions rebase" "$pfx" "$cur_" "$sfx"
+		local section="${pfx%.*.}"
+		__git_compute_second_level_config_vars_for_section "${section}"
+		local this_section="__git_second_level_config_vars_for_section_${section}"
+		__gitcomp "${!this_section}" "$pfx" "$cur_" "$sfx"
 		return
 		;;
 	branch.*)
 		local pfx="${cur_%.*}."
 		cur_="${cur_#*.}"
+		local section="${pfx%.}"
 		__gitcomp_direct "$(__git_heads "$pfx" "$cur_" ".")"
-		__gitcomp_nl_append $'autoSetupMerge\nautoSetupRebase\n' "$pfx" "$cur_" "${sfx- }"
-		return
-		;;
-	guitool.*.*)
-		local pfx="${cur_%.*}."
-		cur_="${cur_##*.}"
-		__gitcomp "
-			argPrompt cmd confirm needsFile noConsole noRescan
-			prompt revPrompt revUnmerged title
-			" "$pfx" "$cur_" "$sfx"
-		return
-		;;
-	difftool.*.*)
-		local pfx="${cur_%.*}."
-		cur_="${cur_##*.}"
-		__gitcomp "cmd path" "$pfx" "$cur_" "$sfx"
-		return
-		;;
-	man.*.*)
-		local pfx="${cur_%.*}."
-		cur_="${cur_##*.}"
-		__gitcomp "cmd path" "$pfx" "$cur_" "$sfx"
-		return
-		;;
-	mergetool.*.*)
-		local pfx="${cur_%.*}."
-		cur_="${cur_##*.}"
-		__gitcomp "cmd path trustExitCode" "$pfx" "$cur_" "$sfx"
+		__git_compute_first_level_config_vars_for_section "${section}"
+		local this_section="__git_first_level_config_vars_for_section_${section}"
+		__gitcomp_nl_append "${!this_section}" "$pfx" "$cur_" "${sfx:- }"
 		return
 		;;
 	pager.*)
 		local pfx="${cur_%.*}."
 		cur_="${cur_#*.}"
 		__git_compute_all_commands
-		__gitcomp_nl "$__git_all_commands" "$pfx" "$cur_" "${sfx- }"
-		return
-		;;
-	remote.*.*)
-		local pfx="${cur_%.*}."
-		cur_="${cur_##*.}"
-		__gitcomp "
-			url proxy fetch push mirror skipDefaultUpdate
-			receivepack uploadpack tagOpt pushurl
-			" "$pfx" "$cur_" "$sfx"
+		__gitcomp_nl "$__git_all_commands" "$pfx" "$cur_" "${sfx:- }"
 		return
 		;;
 	remote.*)
 		local pfx="${cur_%.*}."
 		cur_="${cur_#*.}"
+		local section="${pfx%.}"
 		__gitcomp_nl "$(__git_remotes)" "$pfx" "$cur_" "."
-		__gitcomp_nl_append "pushDefault" "$pfx" "$cur_" "${sfx- }"
+		__git_compute_first_level_config_vars_for_section "${section}"
+		local this_section="__git_first_level_config_vars_for_section_${section}"
+		__gitcomp_nl_append "${!this_section}" "$pfx" "$cur_" "${sfx:- }"
 		return
 		;;
-	url.*.*)
+	submodule.*)
 		local pfx="${cur_%.*}."
-		cur_="${cur_##*.}"
-		__gitcomp "insteadOf pushInsteadOf" "$pfx" "$cur_" "$sfx"
+		cur_="${cur_#*.}"
+		local section="${pfx%.}"
+		__gitcomp_nl "$(__git config -f "$(__git rev-parse --show-toplevel)/.gitmodules" --get-regexp 'submodule.*.path' | awk -F. '{print $2}')" "$pfx" "$cur_" "."
+		__git_compute_first_level_config_vars_for_section "${section}"
+		local this_section="__git_first_level_config_vars_for_section_${section}"
+		__gitcomp_nl_append "${!this_section}" "$pfx" "$cur_" "${sfx:- }"
 		return
 		;;
 	*.*)

t/t9902-completion.sh

@@ -2724,6 +2724,35 @@ test_expect_success 'git config - variable name include' '
 	EOF
 '
 
+test_expect_success 'setup for git config submodule tests' '
+	test_create_repo sub &&
+	test_commit -C sub initial &&
+	git submodule add ./sub
+'
+
+test_expect_success 'git config - variable name - submodule and __git_compute_first_level_config_vars_for_section' '
+	test_completion "git config submodule." <<-\EOF
+	submodule.active Z
+	submodule.alternateErrorStrategy Z
+	submodule.alternateLocation Z
+	submodule.fetchJobs Z
+	submodule.propagateBranches Z
+	submodule.recurse Z
+	submodule.sub.Z
+	EOF
+'
+
+test_expect_success 'git config - variable name - __git_compute_second_level_config_vars_for_section' '
+	test_completion "git config submodule.sub." <<-\EOF
+	submodule.sub.url Z
+	submodule.sub.update Z
+	submodule.sub.branch Z
+	submodule.sub.fetchRecurseSubmodules Z
+	submodule.sub.ignore Z
+	submodule.sub.active Z
+	EOF
+'
+
 test_expect_success 'git config - value' '
 	test_completion "git config color.pager " <<-\EOF
 	false Z