Merge branch 'nd/parseopt-completion'

Teach parse-options API an option to help the completion script,
and make use of the mechanism in command line completion.

* nd/parseopt-completion: (45 commits)
  completion: more subcommands in _git_notes()
  completion: complete --{reuse,reedit}-message= for all notes subcmds
  completion: simplify _git_notes
  completion: don't set PARSE_OPT_NOCOMPLETE on --rerere-autoupdate
  completion: use __gitcomp_builtin in _git_worktree
  completion: use __gitcomp_builtin in _git_tag
  completion: use __gitcomp_builtin in _git_status
  completion: use __gitcomp_builtin in _git_show_branch
  completion: use __gitcomp_builtin in _git_rm
  completion: use __gitcomp_builtin in _git_revert
  completion: use __gitcomp_builtin in _git_reset
  completion: use __gitcomp_builtin in _git_replace
  remote: force completing --mirror= instead of --mirror
  completion: use __gitcomp_builtin in _git_remote
  completion: use __gitcomp_builtin in _git_push
  completion: use __gitcomp_builtin in _git_pull
  completion: use __gitcomp_builtin in _git_notes
  completion: use __gitcomp_builtin in _git_name_rev
  completion: use __gitcomp_builtin in _git_mv
  completion: use __gitcomp_builtin in _git_merge_base
  ...

apply.c

@@ -4943,8 +4943,9 @@ int apply_parse_options(int argc, const char **argv,
 			N_("make sure the patch is applicable to the current index")),
 		OPT_BOOL(0, "cached", &state->cached,
 			N_("apply a patch without touching the working tree")),
-		OPT_BOOL(0, "unsafe-paths", &state->unsafe_paths,
-			N_("accept a patch that touches outside the working area")),
+		OPT_BOOL_F(0, "unsafe-paths", &state->unsafe_paths,
+			   N_("accept a patch that touches outside the working area"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_BOOL(0, "apply", force_apply,
 			N_("also apply the patch (use with --stat/--summary/--check)")),
 		OPT_BOOL('3', "3way", &state->threeway,

builtin/add.c

@@ -294,7 +294,7 @@ static struct option builtin_add_options[] = {
 	OPT_BOOL('i', "interactive", &add_interactive, N_("interactive picking")),
 	OPT_BOOL('p', "patch", &patch_interactive, N_("select hunks interactively")),
 	OPT_BOOL('e', "edit", &edit_interactive, N_("edit current diff and apply")),
-	OPT__FORCE(&ignored_too, N_("allow adding otherwise ignored files")),
+	OPT__FORCE(&ignored_too, N_("allow adding otherwise ignored files"), 0),
 	OPT_BOOL('u', "update", &take_worktree_changes, N_("update tracked files")),
 	OPT_BOOL(0, "renormalize", &add_renormalize, N_("renormalize EOL of tracked files (implies -u)")),
 	OPT_BOOL('N', "intent-to-add", &intent_to_add, N_("record only the fact that the path will be added later")),

builtin/branch.c

@@ -615,7 +615,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
 		OPT_BOOL('l', "create-reflog", &reflog, N_("create the branch's reflog")),
 		OPT_BOOL(0, "edit-description", &edit_description,
 			 N_("edit the description for the branch")),
-		OPT__FORCE(&force, N_("force creation, move/rename, deletion")),
+		OPT__FORCE(&force, N_("force creation, move/rename, deletion"), PARSE_OPT_NOCOMPLETE),
 		OPT_MERGED(&filter, N_("print only branches that are merged")),
 		OPT_NO_MERGED(&filter, N_("print only branches that are not merged")),
 		OPT_COLUMN(0, "column", &colopts, N_("list branches in columns")),

builtin/checkout-index.c

@@ -157,7 +157,7 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 	struct option builtin_checkout_index_options[] = {
 		OPT_BOOL('a', "all", &all,
 			N_("check out all files in the index")),
-		OPT__FORCE(&force, N_("force overwrite of existing files")),
+		OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
 		OPT__QUIET(&quiet,
 			N_("no warning for existing files and files not in index")),
 		OPT_BOOL('n', "no-create", &not_new,

builtin/checkout.c

@@ -1117,9 +1117,12 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 			    2),
 		OPT_SET_INT('3', "theirs", &opts.writeout_stage, N_("checkout their version for unmerged files"),
 			    3),
-		OPT__FORCE(&opts.force, N_("force checkout (throw away local modifications)")),
+		OPT__FORCE(&opts.force, N_("force checkout (throw away local modifications)"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_BOOL('m', "merge", &opts.merge, N_("perform a 3-way merge with the new branch")),
-		OPT_BOOL(0, "overwrite-ignore", &opts.overwrite_ignore, N_("update ignored files (default)")),
+		OPT_BOOL_F(0, "overwrite-ignore", &opts.overwrite_ignore,
+			   N_("update ignored files (default)"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_STRING(0, "conflict", &conflict_style, N_("style"),
 			   N_("conflict style (merge or diff3)")),
 		OPT_BOOL('p', "patch", &opts.patch_mode, N_("select hunks interactively")),

builtin/clean.c

@@ -909,7 +909,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 	struct option options[] = {
 		OPT__QUIET(&quiet, N_("do not print names of files removed")),
 		OPT__DRY_RUN(&dry_run, N_("dry run")),
-		OPT__FORCE(&force, N_("force")),
+		OPT__FORCE(&force, N_("force"), PARSE_OPT_NOCOMPLETE),
 		OPT_BOOL('i', "interactive", &interactive, N_("interactive cleaning")),
 		OPT_BOOL('d', NULL, &remove_directories,
 				N_("remove whole directories")),

builtin/fetch.c

@@ -126,7 +126,7 @@ static struct option builtin_fetch_options[] = {
 		 N_("append to .git/FETCH_HEAD instead of overwriting")),
 	OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
 		   N_("path to upload pack on remote end")),
-	OPT__FORCE(&force, N_("force overwrite of local branch")),
+	OPT__FORCE(&force, N_("force overwrite of local branch"), 0),
 	OPT_BOOL('m', "multiple", &multiple,
 		 N_("fetch from multiple remotes")),
 	OPT_SET_INT('t', "tags", &tags,

builtin/gc.c

@@ -360,8 +360,11 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 			N_("prune unreferenced objects"),
 			PARSE_OPT_OPTARG, NULL, (intptr_t)prune_expire },
 		OPT_BOOL(0, "aggressive", &aggressive, N_("be more thorough (increased runtime)")),
-		OPT_BOOL(0, "auto", &auto_gc, N_("enable auto-gc mode")),
-		OPT_BOOL(0, "force", &force, N_("force running gc even if there may be another gc running")),
+		OPT_BOOL_F(0, "auto", &auto_gc, N_("enable auto-gc mode"),
+			   PARSE_OPT_NOCOMPLETE),
+		OPT_BOOL_F(0, "force", &force,
+			   N_("force running gc even if there may be another gc running"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_END()
 	};
 

builtin/grep.c

@@ -839,8 +839,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 		OPT_BOOL('L', "files-without-match",
 			&opt.unmatch_name_only,
 			N_("show only the names of files without match")),
-		OPT_BOOL('z', "null", &opt.null_following_name,
-			N_("print NUL after filenames")),
+		OPT_BOOL_F('z', "null", &opt.null_following_name,
+			   N_("print NUL after filenames"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_BOOL('c', "count", &opt.count,
 			N_("show the number of matches instead of matching lines")),
 		OPT__COLOR(&opt.color, N_("highlight matches")),
@@ -891,9 +892,11 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 		OPT_GROUP(""),
 		{ OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
 			N_("pager"), N_("show matching files in the pager"),
-			PARSE_OPT_OPTARG, NULL, (intptr_t)default_pager },
-		OPT_BOOL(0, "ext-grep", &external_grep_allowed__ignored,
-			 N_("allow calling of grep(1) (ignored by this build)")),
+			PARSE_OPT_OPTARG | PARSE_OPT_NOCOMPLETE,
+			NULL, (intptr_t)default_pager },
+		OPT_BOOL_F(0, "ext-grep", &external_grep_allowed__ignored,
+			   N_("allow calling of grep(1) (ignored by this build)"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_END()
 	};
 

builtin/ls-remote.c

@@ -60,8 +60,9 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
 		OPT_BIT(0, "refs", &flags, N_("do not show peeled tags"), REF_NORMAL),
 		OPT_BOOL(0, "get-url", &get_url,
 			 N_("take url.<base>.insteadOf into account")),
-		OPT_SET_INT(0, "exit-code", &status,
-			    N_("exit with exit code 2 if no matching refs are found"), 2),
+		OPT_SET_INT_F(0, "exit-code", &status,
+			      N_("exit with exit code 2 if no matching refs are found"),
+			      2, PARSE_OPT_NOCOMPLETE),
 		OPT_BOOL(0, "symref", &show_symref_target,
 			 N_("show underlying ref in addition to the object pointed by it")),
 		OPT_END()

builtin/mv.c

@@ -122,7 +122,8 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
 	struct option builtin_mv_options[] = {
 		OPT__VERBOSE(&verbose, N_("be verbose")),
 		OPT__DRY_RUN(&show_only, N_("dry run")),
-		OPT__FORCE(&force, N_("force move/rename even if target exists")),
+		OPT__FORCE(&force, N_("force move/rename even if target exists"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
 		OPT_END(),
 	};

builtin/notes.c

@@ -413,7 +413,7 @@ static int add(int argc, const char **argv, const char *prefix)
 			parse_reuse_arg},
 		OPT_BOOL(0, "allow-empty", &allow_empty,
 			N_("allow storing empty note")),
-		OPT__FORCE(&force, N_("replace existing notes")),
+		OPT__FORCE(&force, N_("replace existing notes"), PARSE_OPT_NOCOMPLETE),
 		OPT_END()
 	};
 
@@ -484,7 +484,7 @@ static int copy(int argc, const char **argv, const char *prefix)
 	struct notes_tree *t;
 	const char *rewrite_cmd = NULL;
 	struct option options[] = {
-		OPT__FORCE(&force, N_("replace existing notes")),
+		OPT__FORCE(&force, N_("replace existing notes"), PARSE_OPT_NOCOMPLETE),
 		OPT_BOOL(0, "stdin", &from_stdin, N_("read objects from stdin")),
 		OPT_STRING(0, "for-rewrite", &rewrite_cmd, N_("command"),
 			   N_("load rewriting config for <command> (implies "

builtin/pull.c

@@ -193,7 +193,7 @@ static struct option pull_options[] = {
 	OPT_PASSTHRU(0, "upload-pack", &opt_upload_pack, N_("path"),
 		N_("path to upload pack on remote end"),
 		0),
-	OPT__FORCE(&opt_force, N_("force overwrite of local branch")),
+	OPT__FORCE(&opt_force, N_("force overwrite of local branch"), 0),
 	OPT_PASSTHRU('t', "tags", &opt_tags, NULL,
 		N_("fetch all tags and associated objects"),
 		PARSE_OPT_NOARG),

builtin/push.c

@@ -548,7 +548,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		{ OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, "check|on-demand|no",
 			N_("control recursive pushing of submodules"),
 			PARSE_OPT_OPTARG, option_parse_recurse_submodules },
-		OPT_BOOL( 0 , "thin", &thin, N_("use thin pack")),
+		OPT_BOOL_F( 0 , "thin", &thin, N_("use thin pack"), PARSE_OPT_NOCOMPLETE),
 		OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", N_("receive pack program")),
 		OPT_STRING( 0 , "exec", &receivepack, "receive-pack", N_("receive pack program")),
 		OPT_BIT('u', "set-upstream", &flags, N_("set upstream for git pull/status"),

builtin/remote.c

@@ -168,7 +168,7 @@ static int add(int argc, const char **argv)
 		OPT_STRING('m', "master", &master, N_("branch"), N_("master branch")),
 		{ OPTION_CALLBACK, 0, "mirror", &mirror, N_("push|fetch"),
 			N_("set up remote as a mirror to push to or fetch from"),
-			PARSE_OPT_OPTARG, parse_mirror_opt },
+			PARSE_OPT_OPTARG | PARSE_OPT_COMP_ARG, parse_mirror_opt },
 		OPT_END()
 	};
 

builtin/replace.c

@@ -439,7 +439,8 @@ int cmd_replace(int argc, const char **argv, const char *prefix)
 		OPT_CMDMODE('d', "delete", &cmdmode, N_("delete replace refs"), MODE_DELETE),
 		OPT_CMDMODE('e', "edit", &cmdmode, N_("edit existing object"), MODE_EDIT),
 		OPT_CMDMODE('g', "graft", &cmdmode, N_("change a commit's parents"), MODE_GRAFT),
-		OPT_BOOL('f', "force", &force, N_("replace the ref if it exists")),
+		OPT_BOOL_F('f', "force", &force, N_("replace the ref if it exists"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_BOOL(0, "raw", &raw, N_("do not pretty-print contents for --edit")),
 		OPT_STRING(0, "format", &format, N_("format"), N_("use this format")),
 		OPT_END()

builtin/rm.c

@@ -242,7 +242,7 @@ static struct option builtin_rm_options[] = {
 	OPT__DRY_RUN(&show_only, N_("dry run")),
 	OPT__QUIET(&quiet, N_("do not list removed files")),
 	OPT_BOOL( 0 , "cached",         &index_only, N_("only remove from the index")),
-	OPT__FORCE(&force, N_("override the up-to-date check")),
+	OPT__FORCE(&force, N_("override the up-to-date check"), PARSE_OPT_NOCOMPLETE),
 	OPT_BOOL('r', NULL,             &recursive,  N_("allow recursive removal")),
 	OPT_BOOL( 0 , "ignore-unmatch", &ignore_unmatch,
 				N_("exit with a zero status even if nothing matched")),

builtin/submodule--helper.c

@@ -1019,7 +1019,7 @@ static int module_deinit(int argc, const char **argv, const char *prefix)
 
 	struct option module_deinit_options[] = {
 		OPT__QUIET(&quiet, N_("Suppress submodule status output")),
-		OPT__FORCE(&force, N_("Remove submodule working trees even if they contain local changes")),
+		OPT__FORCE(&force, N_("Remove submodule working trees even if they contain local changes"), 0),
 		OPT_BOOL(0, "all", &all, N_("Unregister all submodules")),
 		OPT_END()
 	};

builtin/tag.c

@@ -397,7 +397,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 			N_("how to strip spaces and #comments from message")),
 		OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 					N_("use another key to sign the tag")),
-		OPT__FORCE(&force, N_("replace the tag if exists")),
+		OPT__FORCE(&force, N_("replace the tag if exists"), 0),
 		OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 
 		OPT_GROUP(N_("Tag listing options")),

builtin/update-server-info.c

@@ -12,7 +12,7 @@ int cmd_update_server_info(int argc, const char **argv, const char *prefix)
 {
 	int force = 0;
 	struct option options[] = {
-		OPT__FORCE(&force, N_("update the info files from scratch")),
+		OPT__FORCE(&force, N_("update the info files from scratch"), 0),
 		OPT_END()
 	};
 

builtin/worktree.c

@@ -381,7 +381,9 @@ static int add(int ac, const char **av, const char *prefix)
 	const char *branch;
 	const char *opt_track = NULL;
 	struct option options[] = {
-		OPT__FORCE(&opts.force, N_("checkout <branch> even if already checked out in other worktree")),
+		OPT__FORCE(&opts.force,
+			   N_("checkout <branch> even if already checked out in other worktree"),
+			   PARSE_OPT_NOCOMPLETE),
 		OPT_STRING('b', NULL, &opts.new_branch, N_("branch"),
 			   N_("create a new branch")),
 		OPT_STRING('B', NULL, &new_branch_force, N_("branch"),

contrib/completion/git-completion.bash

@@ -280,6 +280,39 @@ __gitcomp ()
 	esac
 }
 
+# This function is equivalent to
+#
+#    __gitcomp "$(git xxx --git-completion-helper) ..."
+#
+# except that the output is cached. Accept 1-3 arguments:
+# 1: the git command to execute, this is also the cache key
+# 2: extra options to be added on top (e.g. negative forms)
+# 3: options to be excluded
+__gitcomp_builtin ()
+{
+	# spaces must be replaced with underscore for multi-word
+	# commands, e.g. "git remote add" becomes remote_add.
+	local cmd="$1"
+	local incl="$2"
+	local excl="$3"
+
+	local var=__gitcomp_builtin_"${cmd/-/_}"
+	local options
+	eval "options=\$$var"
+
+	if [ -z "$options" ]; then
+		# leading and trailing spaces are significant to make
+		# option removal work correctly.
+		options=" $(__git ${cmd/_/ } --git-completion-helper) $incl "
+		for i in $excl; do
+			options="${options/ $i / }"
+		done
+		eval "$var=\"$options\""
+	fi
+
+	__gitcomp "$options"
+}
+
 # Variation of __gitcomp_nl () that appends to the existing list of
 # completion candidates, COMPREPLY.
 __gitcomp_nl_append ()
@@ -1072,12 +1105,13 @@ __git_count_arguments ()
 }
 
 __git_whitespacelist="nowarn warn error error-all fix"
+__git_am_inprogress_options="--skip --continue --resolved --abort --quit --show-current-patch"
 
 _git_am ()
 {
 	__git_find_repo_path
 	if [ -d "$__git_repo_path"/rebase-apply ]; then
-		__gitcomp "--skip --continue --resolved --abort --quit --show-current-patch"
+		__gitcomp "$__git_am_inprogress_options"
 		return
 	fi
 	case "$cur" in
@@ -1086,12 +1120,8 @@ _git_am ()
 		return
 		;;
 	--*)
-		__gitcomp "
-			--3way --committer-date-is-author-date --ignore-date
-			--ignore-whitespace --ignore-space-change
-			--interactive --keep --no-utf8 --signoff --utf8
-			--whitespace= --scissors
-			"
+		__gitcomp_builtin am "--no-utf8" \
+			"$__git_am_inprogress_options"
 		return
 	esac
 }
@@ -1104,14 +1134,7 @@ _git_apply ()
 		return
 		;;
 	--*)
-		__gitcomp "
-			--stat --numstat --summary --check --index
-			--cached --index-info --reverse --reject --unidiff-zero
-			--apply --no-add --exclude=
-			--ignore-whitespace --ignore-space-change
-			--whitespace= --inaccurate-eof --verbose
-			--recount --directory=
-			"
+		__gitcomp_builtin apply
 		return
 	esac
 }
@@ -1120,10 +1143,7 @@ _git_add ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--interactive --refresh --patch --update --dry-run
-			--ignore-errors --intent-to-add --force --edit --chmod=
-			"
+		__gitcomp_builtin add
 		return
 	esac
 
@@ -1200,12 +1220,8 @@ _git_branch ()
 		__git_complete_refs --cur="${cur##--set-upstream-to=}"
 		;;
 	--*)
-		__gitcomp "
-			--color --no-color --verbose --abbrev= --no-abbrev
-			--track --no-track --contains --no-contains --merged --no-merged
-			--set-upstream-to= --edit-description --list
-			--unset-upstream --delete --move --copy --remotes
-			--column --no-column --sort= --points-at
+		__gitcomp_builtin branch "--no-color --no-abbrev
+			--no-track --no-column
 			"
 		;;
 	*)
@@ -1247,11 +1263,7 @@ _git_checkout ()
 		__gitcomp "diff3 merge" "" "${cur##--conflict=}"
 		;;
 	--*)
-		__gitcomp "
-			--quiet --ours --theirs --track --no-track --merge
-			--conflict= --orphan --patch --detach --ignore-skip-worktree-bits
-			--recurse-submodules --no-recurse-submodules
-			"
+		__gitcomp_builtin checkout "--no-track --no-recurse-submodules"
 		;;
 	*)
 		# check if --track, --no-track, or --no-guess was specified
@@ -1271,16 +1283,19 @@ _git_cherry ()
 	__git_complete_refs
 }
 
+__git_cherry_pick_inprogress_options="--continue --quit --abort"
+
 _git_cherry_pick ()
 {
 	__git_find_repo_path
 	if [ -f "$__git_repo_path"/CHERRY_PICK_HEAD ]; then
-		__gitcomp "--continue --quit --abort"
+		__gitcomp "$__git_cherry_pick_inprogress_options"
 		return
 	fi
 	case "$cur" in
 	--*)
-		__gitcomp "--edit --no-commit --signoff --strategy= --mainline"
+		__gitcomp_builtin cherry-pick "" \
+			"$__git_cherry_pick_inprogress_options"
 		;;
 	*)
 		__git_complete_refs
@@ -1292,7 +1307,7 @@ _git_clean ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--dry-run --quiet"
+		__gitcomp_builtin clean
 		return
 		;;
 	esac
@@ -1305,26 +1320,7 @@ _git_clone ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--local
-			--no-hardlinks
-			--shared
-			--reference
-			--quiet
-			--no-checkout
-			--bare
-			--mirror
-			--origin
-			--upload-pack
-			--template=
-			--depth
-			--single-branch
-			--no-tags
-			--branch
-			--recurse-submodules
-			--no-single-branch
-			--shallow-submodules
-			"
+		__gitcomp_builtin clone "--no-single-branch"
 		return
 		;;
 	esac
@@ -1357,16 +1353,7 @@ _git_commit ()
 		return
 		;;
 	--*)
-		__gitcomp "
-			--all --author= --signoff --verify --no-verify
-			--edit --no-edit
-			--amend --include --only --interactive
-			--dry-run --reuse-message= --reedit-message=
-			--reset-author --file= --message= --template=
-			--cleanup= --untracked-files --untracked-files=
-			--verbose --quiet --fixup= --squash=
-			--patch --short --date --allow-empty
-			"
+		__gitcomp_builtin commit "--no-edit --verify"
 		return
 	esac
 
@@ -1382,11 +1369,7 @@ _git_describe ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--all --tags --contains --abbrev= --candidates=
-			--exact-match --debug --long --match --always --first-parent
-			--exclude --dirty --broken
-			"
+		__gitcomp_builtin describe
 		return
 	esac
 	__git_complete_refs
@@ -1411,7 +1394,7 @@ __git_diff_common_options="--stat --numstat --shortstat --summary
 			--dirstat --dirstat= --dirstat-by-file
 			--dirstat-by-file= --cumulative
 			--diff-algorithm=
-			--submodule --submodule=
+			--submodule --submodule= --ignore-submodules
 "
 
 _git_diff ()
@@ -1452,11 +1435,11 @@ _git_difftool ()
 		return
 		;;
 	--*)
-		__gitcomp "--cached --staged --pickaxe-all --pickaxe-regex
-			--base --ours --theirs
-			--no-renames --diff-filter= --find-copies-harder
-			--relative --ignore-submodules
-			--tool="
+		__gitcomp_builtin difftool "$__git_diff_common_options
+					--base --cached --ours --theirs
+					--pickaxe-all --pickaxe-regex
+					--relative --staged
+					"
 		return
 		;;
 	esac
@@ -1465,12 +1448,6 @@ _git_difftool ()
 
 __git_fetch_recurse_submodules="yes on-demand no"
 
-__git_fetch_options="
-	--quiet --verbose --append --upload-pack --force --keep --depth=
-	--tags --no-tags --all --prune --dry-run --recurse-submodules=
-	--unshallow --update-shallow --prune-tags
-"
-
 _git_fetch ()
 {
 	case "$cur" in
@@ -1479,7 +1456,7 @@ _git_fetch ()
 		return
 		;;
 	--*)
-		__gitcomp "$__git_fetch_options"
+		__gitcomp_builtin fetch "--no-tags"
 		return
 		;;
 	esac
@@ -1516,10 +1493,7 @@ _git_fsck ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--tags --root --unreachable --cache --no-reflogs --full
-			--strict --verbose --lost-found --name-objects
-			"
+		__gitcomp_builtin fsck "--no-reflogs"
 		return
 		;;
 	esac
@@ -1529,7 +1503,7 @@ _git_gc ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--prune --aggressive"
+		__gitcomp_builtin gc
 		return
 		;;
 	esac
@@ -1585,21 +1559,7 @@ _git_grep ()
 
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--cached
-			--text --ignore-case --word-regexp --invert-match
-			--full-name --line-number
-			--extended-regexp --basic-regexp --fixed-strings
-			--perl-regexp
-			--threads
-			--files-with-matches --name-only
-			--files-without-match
-			--max-depth
-			--count
-			--and --or --not --all-match
-			--break --heading --show-function --function-context
-			--untracked --no-index
-			"
+		__gitcomp_builtin grep
 		return
 		;;
 	esac
@@ -1617,7 +1577,7 @@ _git_help ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--all --guides --info --man --web"
+		__gitcomp_builtin help
 		return
 		;;
 	esac
@@ -1640,7 +1600,7 @@ _git_init ()
 		return
 		;;
 	--*)
-		__gitcomp "--quiet --bare --template= --shared --shared="
+		__gitcomp_builtin init
 		return
 		;;
 	esac
@@ -1650,13 +1610,7 @@ _git_ls_files ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--cached --deleted --modified --others --ignored
-			--stage --directory --no-empty-directory --unmerged
-			--killed --exclude= --exclude-from=
-			--exclude-per-directory= --exclude-standard
-			--error-unmatch --with-tree= --full-name
-			--abbrev --ignored --exclude-per-directory
-			"
+		__gitcomp_builtin ls-files "--no-empty-directory"
 		return
 		;;
 	esac
@@ -1670,7 +1624,7 @@ _git_ls_remote ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--heads --tags --refs --get-url --symref"
+		__gitcomp_builtin ls-remote
 		return
 		;;
 	esac
@@ -1794,22 +1748,18 @@ _git_log ()
 	__git_complete_revlist
 }
 
-# Common merge options shared by git-merge(1) and git-pull(1).
-__git_merge_options="
-	--no-commit --no-stat --log --no-log --squash --strategy
-	--commit --stat --no-squash --ff --no-ff --ff-only --edit --no-edit
-	--verify-signatures --no-verify-signatures --gpg-sign
-	--quiet --verbose --progress --no-progress
-"
-
 _git_merge ()
 {
 	__git_complete_strategy && return
 
 	case "$cur" in
 	--*)
-		__gitcomp "$__git_merge_options
-			--rerere-autoupdate --no-rerere-autoupdate --abort --continue"
+		__gitcomp_builtin merge "--no-rerere-autoupdate
+				--no-commit --no-edit --no-ff
+				--no-log --no-progress
+				--no-squash --no-stat
+				--no-verify-signatures
+				"
 		return
 	esac
 	__git_complete_refs
@@ -1833,7 +1783,7 @@ _git_merge_base ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--octopus --independent --is-ancestor --fork-point"
+		__gitcomp_builtin merge-base
 		return
 		;;
 	esac
@@ -1844,7 +1794,7 @@ _git_mv ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--dry-run"
+		__gitcomp_builtin mv
 		return
 		;;
 	esac
@@ -1860,17 +1810,17 @@ _git_mv ()
 
 _git_name_rev ()
 {
-	__gitcomp "--tags --all --stdin"
+	__gitcomp_builtin name-rev
 }
 
 _git_notes ()
 {
-	local subcommands='add append copy edit list prune remove show'
+	local subcommands='add append copy edit get-ref list merge prune remove show'
 	local subcommand="$(__git_find_on_cmdline "$subcommands")"
 
 	case "$subcommand,$cur" in
 	,--*)
-		__gitcomp '--ref'
+		__gitcomp_builtin notes
 		;;
 	,*)
 		case "$prev" in
@@ -1882,21 +1832,14 @@ _git_notes ()
 			;;
 		esac
 		;;
-	add,--reuse-message=*|append,--reuse-message=*|\
-	add,--reedit-message=*|append,--reedit-message=*)
+	*,--reuse-message=*|*,--reedit-message=*)
 		__git_complete_refs --cur="${cur#*=}"
 		;;
-	add,--*|append,--*)
-		__gitcomp '--file= --message= --reedit-message=
-				--reuse-message='
+	*,--*)
+		__gitcomp_builtin notes_$subcommand
 		;;
-	copy,--*)
-		__gitcomp '--stdin'
-		;;
-	prune,--*)
-		__gitcomp '--dry-run --verbose'
-		;;
-	prune,*)
+	prune,*|get-ref,*)
+		# this command does not take a ref, do not complete it
 		;;
 	*)
 		case "$prev" in
@@ -1920,12 +1863,11 @@ _git_pull ()
 		return
 		;;
 	--*)
-		__gitcomp "
-			--rebase --no-rebase
-			--autostash --no-autostash
-			$__git_merge_options
-			$__git_fetch_options
-		"
+		__gitcomp_builtin pull "--no-autostash --no-commit --no-edit
+					--no-ff --no-log --no-progress --no-rebase
+					--no-squash --no-stat --no-tags
+					--no-verify-signatures"
+
 		return
 		;;
 	esac
@@ -1976,12 +1918,7 @@ _git_push ()
 		return
 		;;
 	--*)
-		__gitcomp "
-			--all --mirror --tags --dry-run --force --verbose
-			--quiet --prune --delete --follow-tags
-			--receive-pack= --repo= --set-upstream
-			--force-with-lease --force-with-lease= --recurse-submodules=
-		"
+		__gitcomp_builtin push
 		return
 		;;
 	esac
@@ -2016,6 +1953,7 @@ _git_rebase ()
 			--autostash --no-autostash
 			--verify --no-verify
 			--keep-empty --root --force-rebase --no-ff
+			--rerere-autoupdate
 			--exec
 			"
 
@@ -2119,11 +2057,7 @@ _git_status ()
 		return
 		;;
 	--*)
-		__gitcomp "
-			--short --branch --porcelain --long --verbose
-			--untracked-files= --ignore-submodules= --ignored
-			--column= --no-column
-			"
+		__gitcomp_builtin status "--no-column"
 		return
 		;;
 	esac
@@ -2265,14 +2199,7 @@ _git_config ()
 	esac
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--system --global --local --file=
-			--list --replace-all
-			--get --get-all --get-regexp
-			--add --unset --unset-all
-			--remove-section --rename-section
-			--name-only
-			"
+		__gitcomp_builtin config
 		return
 		;;
 	branch.*.*)
@@ -2672,7 +2599,7 @@ _git_remote ()
 	if [ -z "$subcommand" ]; then
 		case "$cur" in
 		--*)
-			__gitcomp "--verbose"
+			__gitcomp_builtin remote
 			;;
 		*)
 			__gitcomp "$subcommands"
@@ -2683,33 +2610,33 @@ _git_remote ()
 
 	case "$subcommand,$cur" in
 	add,--*)
-		__gitcomp "--track --master --fetch --tags --no-tags --mirror="
+		__gitcomp_builtin remote_add "--no-tags"
 		;;
 	add,*)
 		;;
 	set-head,--*)
-		__gitcomp "--auto --delete"
+		__gitcomp_builtin remote_set-head
 		;;
 	set-branches,--*)
-		__gitcomp "--add"
+		__gitcomp_builtin remote_set-branches
 		;;
 	set-head,*|set-branches,*)
 		__git_complete_remote_or_refspec
 		;;
 	update,--*)
-		__gitcomp "--prune"
+		__gitcomp_builtin remote_update
 		;;
 	update,*)
 		__gitcomp "$(__git_get_config_variables "remotes")"
 		;;
 	set-url,--*)
-		__gitcomp "--push --add --delete"
+		__gitcomp_builtin remote_set-url
 		;;
 	get-url,--*)
-		__gitcomp "--push --all"
+		__gitcomp_builtin remote_get-url
 		;;
 	prune,--*)
-		__gitcomp "--dry-run"
+		__gitcomp_builtin remote_prune
 		;;
 	*)
 		__gitcomp_nl "$(__git_remotes)"
@@ -2721,7 +2648,7 @@ _git_replace ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--edit --graft --format= --list --delete"
+		__gitcomp_builtin replace
 		return
 		;;
 	esac
@@ -2745,26 +2672,26 @@ _git_reset ()
 
 	case "$cur" in
 	--*)
-		__gitcomp "--merge --mixed --hard --soft --patch --keep"
+		__gitcomp_builtin reset
 		return
 		;;
 	esac
 	__git_complete_refs
 }
 
+__git_revert_inprogress_options="--continue --quit --abort"
+
 _git_revert ()
 {
 	__git_find_repo_path
 	if [ -f "$__git_repo_path"/REVERT_HEAD ]; then
-		__gitcomp "--continue --quit --abort"
+		__gitcomp "$__git_revert_inprogress_options"
 		return
 	fi
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--edit --mainline --no-edit --no-commit --signoff
-			--strategy= --strategy-option=
-			"
+		__gitcomp_builtin revert "--no-edit" \
+			"$__git_revert_inprogress_options"
 		return
 		;;
 	esac
@@ -2775,7 +2702,7 @@ _git_rm ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "--cached --dry-run --ignore-unmatch --quiet"
+		__gitcomp_builtin rm
 		return
 		;;
 	esac
@@ -2833,12 +2760,7 @@ _git_show_branch ()
 {
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--all --remotes --topo-order --date-order --current --more=
-			--list --independent --merge-base --no-name
-			--color --no-color
-			--sha1-name --sparse --topics --reflog
-			"
+		__gitcomp_builtin show-branch "--no-color"
 		return
 		;;
 	esac
@@ -3071,11 +2993,7 @@ _git_tag ()
 
 	case "$cur" in
 	--*)
-		__gitcomp "
-			--list --delete --verify --annotate --message --file
-			--sign --cleanup --local-user --force --column --sort=
-			--contains --no-contains --points-at --merged --no-merged --create-reflog
-			"
+		__gitcomp_builtin tag
 		;;
 	esac
 }
@@ -3094,16 +3012,16 @@ _git_worktree ()
 	else
 		case "$subcommand,$cur" in
 		add,--*)
-			__gitcomp "--detach"
+			__gitcomp_builtin worktree_add
 			;;
 		list,--*)
-			__gitcomp "--porcelain"
+			__gitcomp_builtin worktree_list
 			;;
 		lock,--*)
-			__gitcomp "--reason"
+			__gitcomp_builtin worktree_lock
 			;;
 		prune,--*)
-			__gitcomp "--dry-run --expire --verbose"
+			__gitcomp_builtin worktree_prune
 			;;
 		remove,--*)
 			__gitcomp "--force"

parse-options.c

@@ -425,6 +425,48 @@ void parse_options_start(struct parse_opt_ctx_t *ctx,
 	parse_options_check(options);
 }
 
+/*
+ * TODO: we are not completing the --no-XXX form yet because there are
+ * many options that do not suppress it properly.
+ */
+static int show_gitcomp(struct parse_opt_ctx_t *ctx,
+			const struct option *opts)
+{
+	for (; opts->type != OPTION_END; opts++) {
+		const char *suffix = "";
+
+		if (!opts->long_name)
+			continue;
+		if (opts->flags & (PARSE_OPT_HIDDEN | PARSE_OPT_NOCOMPLETE))
+			continue;
+
+		switch (opts->type) {
+		case OPTION_GROUP:
+			continue;
+		case OPTION_STRING:
+		case OPTION_FILENAME:
+		case OPTION_INTEGER:
+		case OPTION_MAGNITUDE:
+		case OPTION_CALLBACK:
+			if (opts->flags & PARSE_OPT_NOARG)
+				break;
+			if (opts->flags & PARSE_OPT_OPTARG)
+				break;
+			if (opts->flags & PARSE_OPT_LASTARG_DEFAULT)
+				break;
+			suffix = "=";
+			break;
+		default:
+			break;
+		}
+		if (opts->flags & PARSE_OPT_COMP_ARG)
+			suffix = "=";
+		printf(" --%s%s", opts->long_name, suffix);
+	}
+	fputc('\n', stdout);
+	exit(0);
+}
+
 static int usage_with_options_internal(struct parse_opt_ctx_t *,
 				       const char * const *,
 				       const struct option *, int, int);
@@ -455,6 +497,10 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
 		if (internal_help && ctx->total == 1 && !strcmp(arg + 1, "h"))
 			goto show_usage;
 
+		/* lone --git-completion-helper is asked by git-completion.bash */
+		if (ctx->total == 1 && !strcmp(arg + 1, "-git-completion-helper"))
+			return show_gitcomp(ctx, options);
+
 		if (arg[1] != '-') {
 			ctx->opt = arg + 1;
 			switch (parse_short_opt(ctx, options)) {

parse-options.h

@@ -38,7 +38,9 @@ enum parse_opt_option_flags {
 	PARSE_OPT_LASTARG_DEFAULT = 16,
 	PARSE_OPT_NODASH = 32,
 	PARSE_OPT_LITERAL_ARGHELP = 64,
-	PARSE_OPT_SHELL_EVAL = 256
+	PARSE_OPT_SHELL_EVAL = 256,
+	PARSE_OPT_NOCOMPLETE = 512,
+	PARSE_OPT_COMP_ARG = 1024
 };
 
 struct option;
@@ -89,6 +91,11 @@ typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
  *   PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets
  *				(i.e. '<argh>') in the help message.
  *				Useful for options with multiple parameters.
+ *   PARSE_OPT_NOCOMPLETE: by default all visible options are completable
+ *			   by git-completion.bash. This option suppresses that.
+ *   PARSE_OPT_COMP_ARG: this option forces to git-completion.bash to
+ *			 complete an option as --name= not --name even if
+ *			 the option takes optional argument.
  *
  * `callback`::
  *   pointer to the callback to use for OPTION_CALLBACK or
@@ -112,19 +119,24 @@ struct option {
 	intptr_t defval;
 };
 
+#define OPT_BIT_F(s, l, v, h, b, f) { OPTION_BIT, (s), (l), (v), NULL, (h), \
+				      PARSE_OPT_NOARG|(f), NULL, (b) }
+#define OPT_COUNTUP_F(s, l, v, h, f) { OPTION_COUNTUP, (s), (l), (v), NULL, \
+				       (h), PARSE_OPT_NOARG|(f) }
+#define OPT_SET_INT_F(s, l, v, h, i, f) { OPTION_SET_INT, (s), (l), (v), NULL, \
+					  (h), PARSE_OPT_NOARG | (f), NULL, (i) }
+#define OPT_BOOL_F(s, l, v, h, f)   OPT_SET_INT_F(s, l, v, h, 1, f)
+
 #define OPT_END()                   { OPTION_END }
 #define OPT_ARGUMENT(l, h)          { OPTION_ARGUMENT, 0, (l), NULL, NULL, \
 				      (h), PARSE_OPT_NOARG}
 #define OPT_GROUP(h)                { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
-#define OPT_BIT(s, l, v, h, b)      { OPTION_BIT, (s), (l), (v), NULL, (h), \
-				      PARSE_OPT_NOARG, NULL, (b) }
+#define OPT_BIT(s, l, v, h, b)      OPT_BIT_F(s, l, v, h, b, 0)
 #define OPT_NEGBIT(s, l, v, h, b)   { OPTION_NEGBIT, (s), (l), (v), NULL, \
 				      (h), PARSE_OPT_NOARG, NULL, (b) }
-#define OPT_COUNTUP(s, l, v, h)     { OPTION_COUNTUP, (s), (l), (v), NULL, \
-				      (h), PARSE_OPT_NOARG }
-#define OPT_SET_INT(s, l, v, h, i)  { OPTION_SET_INT, (s), (l), (v), NULL, \
-				      (h), PARSE_OPT_NOARG, NULL, (i) }
-#define OPT_BOOL(s, l, v, h)        OPT_SET_INT(s, l, v, h, 1)
+#define OPT_COUNTUP(s, l, v, h)     OPT_COUNTUP_F(s, l, v, h, 0)
+#define OPT_SET_INT(s, l, v, h, i)  OPT_SET_INT_F(s, l, v, h, i, 0)
+#define OPT_BOOL(s, l, v, h)        OPT_BOOL_F(s, l, v, h, 0)
 #define OPT_HIDDEN_BOOL(s, l, v, h) { OPTION_SET_INT, (s), (l), (v), NULL, \
 				      (h), PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1}
 #define OPT_CMDMODE(s, l, v, h, i)  { OPTION_CMDMODE, (s), (l), (v), NULL, \
@@ -240,7 +252,7 @@ extern int parse_opt_passthru_argv(const struct option *, const char *, int);
 	{ OPTION_CALLBACK, 'q', "quiet", (var), NULL, N_("be more quiet"), \
 	  PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
 #define OPT__DRY_RUN(var, h)  OPT_BOOL('n', "dry-run", (var), (h))
-#define OPT__FORCE(var, h)    OPT_COUNTUP('f', "force",   (var), (h))
+#define OPT__FORCE(var, h, f) OPT_COUNTUP_F('f', "force",   (var), (h), (f))
 #define OPT__ABBREV(var)  \
 	{ OPTION_CALLBACK, 0, "abbrev", (var), N_("n"),	\
 	  N_("use <n> digits to display SHA-1s"),	\

t/t9902-completion.sh

@@ -1237,17 +1237,19 @@ test_expect_success 'double dash "git" itself' '
 test_expect_success 'double dash "git checkout"' '
 	test_completion "git checkout --" <<-\EOF
 	--quiet Z
+	--detach Z
+	--track Z
+	--orphan=Z
 	--ours Z
 	--theirs Z
-	--track Z
-	--no-track Z
 	--merge Z
-	--conflict=
-	--orphan Z
+	--conflict=Z
 	--patch Z
-	--detach Z
 	--ignore-skip-worktree-bits Z
+	--ignore-other-worktrees Z
 	--recurse-submodules Z
+	--progress Z
+	--no-track Z
 	--no-recurse-submodules Z
 	EOF
 '