[PATCH 00/20] nd/diff-parseopt part 3

[PATCH 00/20] nd/diff-parseopt part 3

[Nguyễn Thái Ngọc Duy]

The next part of nd/diff-parseopt to continue converting more diff
options to parseopt. Based on nd/diff-parseopt-2.

Part 4 will hopefully finish the diff.c part and we'll move on to 4-5
more parts on revision.c.

Nguyễn Thái Ngọc Duy (20):
  diff-parseopt: convert --[no-]indent-heuristic
  diff-parseopt: convert --patience
  diff-parseopt: convert --histogram
  diff-parseopt: convert --diff-algorithm
  diff-parseopt: convert --anchored
  diff-parseopt: convert --binary
  diff-parseopt: convert --full-index
  diff-parseopt: convert -a|--text
  diff-parseopt: convert -R
  diff-parseopt: convert --[no-]follow
  diff-parseopt: convert --[no-]color
  diff-parseopt: convert --word-diff
  diff-parseopt: convert --word-diff-regex
  diff-parseopt: convert --color-words
  diff-parseopt: convert --exit-code
  diff-parseopt: convert --quiet
  diff-parseopt: convert --ext-diff
  diff-parseopt: convert --textconv
  diff-parseopt: convert --ignore-submodules
  diff-parseopt: convert --submodule

 Documentation/diff-options.txt |   2 +-
 diff.c                         | 342 ++++++++++++++++++++++-----------
 2 files changed, 229 insertions(+), 115 deletions(-)

-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 01/20] diff-parseopt: convert --[no-]indent-heuristic

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/diff.c b/diff.c
index a63ee4a44d..c4cd84f1b3 100644
--- a/diff.c
+++ b/diff.c
@@ -5124,6 +5124,9 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_BIT_F(0, "ignore-blank-lines", &options->xdl_opts,
 			  N_("ignore changes whose lines are all blank"),
 			  XDF_IGNORE_BLANK_LINES, PARSE_OPT_NONEG),
+		OPT_BIT(0, "indent-heuristic", &options->xdl_opts,
+			N_("heuristic to shift diff hunk boundaries for easy reading"),
+			XDF_INDENT_HEURISTIC),
 
 		OPT_GROUP(N_("Diff other options")),
 		OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5162,11 +5165,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* xdiff options */
-	if (!strcmp(arg, "--indent-heuristic"))
-		DIFF_XDL_SET(options, INDENT_HEURISTIC);
-	else if (!strcmp(arg, "--no-indent-heuristic"))
-		DIFF_XDL_CLR(options, INDENT_HEURISTIC);
-	else if (!strcmp(arg, "--patience")) {
+	if (!strcmp(arg, "--patience")) {
 		int i;
 		options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
 		/*
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 02/20] diff-parseopt: convert --patience

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/diff.c b/diff.c
index c4cd84f1b3..7899c7cc06 100644
--- a/diff.c
+++ b/diff.c
@@ -4960,6 +4960,26 @@ static enum parse_opt_result diff_opt_output(struct parse_opt_ctx_t *ctx,
 	return 0;
 }
 
+static int diff_opt_patience(const struct option *opt,
+			     const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+	int i;
+
+	BUG_ON_OPT_NEG(unset);
+	BUG_ON_OPT_ARG(arg);
+	options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
+	/*
+	 * Both --patience and --anchored use PATIENCE_DIFF
+	 * internally, so remove any anchors previously
+	 * specified.
+	 */
+	for (i = 0; i < options->anchors_nr; i++)
+		free(options->anchors[i]);
+	options->anchors_nr = 0;
+	return 0;
+}
+
 static int diff_opt_relative(const struct option *opt,
 			     const char *arg, int unset)
 {
@@ -5127,6 +5147,10 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_BIT(0, "indent-heuristic", &options->xdl_opts,
 			N_("heuristic to shift diff hunk boundaries for easy reading"),
 			XDF_INDENT_HEURISTIC),
+		OPT_CALLBACK_F(0, "patience", options, NULL,
+			       N_("generate diff using the \"patience diff\" algorithm"),
+			       PARSE_OPT_NONEG | PARSE_OPT_NOARG,
+			       diff_opt_patience),
 
 		OPT_GROUP(N_("Diff other options")),
 		OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5165,18 +5189,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* xdiff options */
-	if (!strcmp(arg, "--patience")) {
-		int i;
-		options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
-		/*
-		 * Both --patience and --anchored use PATIENCE_DIFF
-		 * internally, so remove any anchors previously
-		 * specified.
-		 */
-		for (i = 0; i < options->anchors_nr; i++)
-			free(options->anchors[i]);
-		options->anchors_nr = 0;
-	} else if (!strcmp(arg, "--histogram"))
+	if (!strcmp(arg, "--histogram"))
 		options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF);
 	else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) {
 		long value = parse_algorithm_value(optarg);
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 03/20] diff-parseopt: convert --histogram

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/diff.c b/diff.c
index 7899c7cc06..7432702fd8 100644
--- a/diff.c
+++ b/diff.c
@@ -5151,6 +5151,9 @@ static void prep_parse_options(struct diff_options *options)
 			       N_("generate diff using the \"patience diff\" algorithm"),
 			       PARSE_OPT_NONEG | PARSE_OPT_NOARG,
 			       diff_opt_patience),
+		OPT_BITOP(0, "histogram", &options->xdl_opts,
+			  N_("generate diff using the \"histogram diff\" algorithm"),
+			  XDF_HISTOGRAM_DIFF, XDF_DIFF_ALGORITHM_MASK),
 
 		OPT_GROUP(N_("Diff other options")),
 		OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5189,9 +5192,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* xdiff options */
-	if (!strcmp(arg, "--histogram"))
-		options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF);
-	else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) {
+	if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) {
 		long value = parse_algorithm_value(optarg);
 		if (value < 0)
 			return error("option diff-algorithm accepts \"myers\", "
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 04/20] diff-parseopt: convert --diff-algorithm

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/diff.c b/diff.c
index 7432702fd8..8d08795f9c 100644
--- a/diff.c
+++ b/diff.c
@@ -4891,6 +4891,24 @@ static int diff_opt_compact_summary(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_diff_algorithm(const struct option *opt,
+				   const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+	long value = parse_algorithm_value(arg);
+
+	BUG_ON_OPT_NEG(unset);
+	if (value < 0)
+		return error(_("option diff-algorithm accepts \"myers\", "
+			       "\"minimal\", \"patience\" and \"histogram\""));
+
+	/* clear out previous settings */
+	DIFF_XDL_CLR(options, NEED_MINIMAL);
+	options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
+	options->xdl_opts |= value;
+	return 0;
+}
+
 static int diff_opt_dirstat(const struct option *opt,
 			    const char *arg, int unset)
 {
@@ -5154,6 +5172,9 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_BITOP(0, "histogram", &options->xdl_opts,
 			  N_("generate diff using the \"histogram diff\" algorithm"),
 			  XDF_HISTOGRAM_DIFF, XDF_DIFF_ALGORITHM_MASK),
+		OPT_CALLBACK_F(0, "diff-algorithm", options, N_("<algorithm>"),
+			       N_("choose a diff algorithm"),
+			       PARSE_OPT_NONEG, diff_opt_diff_algorithm),
 
 		OPT_GROUP(N_("Diff other options")),
 		OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5192,17 +5213,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* xdiff options */
-	if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) {
-		long value = parse_algorithm_value(optarg);
-		if (value < 0)
-			return error("option diff-algorithm accepts \"myers\", "
-				     "\"minimal\", \"patience\" and \"histogram\"");
-		/* clear out previous settings */
-		DIFF_XDL_CLR(options, NEED_MINIMAL);
-		options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
-		options->xdl_opts |= value;
-		return argcount;
-	} else if (skip_prefix(arg, "--anchored=", &arg)) {
+	if (skip_prefix(arg, "--anchored=", &arg)) {
 		options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
 		ALLOC_GROW(options->anchors, options->anchors_nr + 1,
 			   options->anchors_alloc);
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 05/20] diff-parseopt: convert --anchored

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/diff.c b/diff.c
index 8d08795f9c..5195526db9 100644
--- a/diff.c
+++ b/diff.c
@@ -4839,6 +4839,19 @@ static int parse_objfind_opt(struct diff_options *opt, const char *arg)
 	return 1;
 }
 
+static int diff_opt_anchored(const struct option *opt,
+			     const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
+	ALLOC_GROW(options->anchors, options->anchors_nr + 1,
+		   options->anchors_alloc);
+	options->anchors[options->anchors_nr++] = xstrdup(arg);
+	return 0;
+}
+
 static int diff_opt_break_rewrites(const struct option *opt,
 				   const char *arg, int unset)
 {
@@ -5175,6 +5188,9 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_CALLBACK_F(0, "diff-algorithm", options, N_("<algorithm>"),
 			       N_("choose a diff algorithm"),
 			       PARSE_OPT_NONEG, diff_opt_diff_algorithm),
+		OPT_CALLBACK_F(0, "anchored", options, N_("<text>"),
+			       N_("generate diff using the \"anchored diff\" algorithm"),
+			       PARSE_OPT_NONEG, diff_opt_anchored),
 
 		OPT_GROUP(N_("Diff other options")),
 		OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5212,16 +5228,8 @@ int diff_opt_parse(struct diff_options *options,
 	if (ac)
 		return ac;
 
-	/* xdiff options */
-	if (skip_prefix(arg, "--anchored=", &arg)) {
-		options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
-		ALLOC_GROW(options->anchors, options->anchors_nr + 1,
-			   options->anchors_alloc);
-		options->anchors[options->anchors_nr++] = xstrdup(arg);
-	}
-
 	/* flags options */
-	else if (!strcmp(arg, "--binary")) {
+	if (!strcmp(arg, "--binary")) {
 		enable_patch_output(&options->output_format);
 		options->flags.binary = 1;
 	}
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 06/20] diff-parseopt: convert --binary

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 Documentation/diff-options.txt |  2 +-
 diff.c                         | 21 ++++++++++++++++-----
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 915f2fec8b..6810c94fea 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -425,7 +425,7 @@ endif::git-format-patch[]
 
 --binary::
 	In addition to `--full-index`, output a binary diff that
-	can be applied with `git-apply`.
+	can be applied with `git-apply`. Implies `--patch`.
 
 --abbrev[=<n>]::
 	Instead of showing the full 40-byte hexadecimal object
diff --git a/diff.c b/diff.c
index 5195526db9..214728c892 100644
--- a/diff.c
+++ b/diff.c
@@ -4852,6 +4852,18 @@ static int diff_opt_anchored(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_binary(const struct option *opt,
+			   const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	BUG_ON_OPT_ARG(arg);
+	enable_patch_output(&options->output_format);
+	options->flags.binary = 1;
+	return 0;
+}
+
 static int diff_opt_break_rewrites(const struct option *opt,
 				   const char *arg, int unset)
 {
@@ -5116,6 +5128,9 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_CALLBACK_F(0, "compact-summary", options, NULL,
 			       N_("generate compact summary in diffstat"),
 			       PARSE_OPT_NOARG, diff_opt_compact_summary),
+		OPT_CALLBACK_F(0, "binary", options, NULL,
+			       N_("output a binary diff that can be applied"),
+			       PARSE_OPT_NONEG | PARSE_OPT_NOARG, diff_opt_binary),
 		OPT_CALLBACK_F(0, "output-indicator-new",
 			       &options->output_indicators[OUTPUT_INDICATOR_NEW],
 			       N_("<char>"),
@@ -5229,11 +5244,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* flags options */
-	if (!strcmp(arg, "--binary")) {
-		enable_patch_output(&options->output_format);
-		options->flags.binary = 1;
-	}
-	else if (!strcmp(arg, "--full-index"))
+	if (!strcmp(arg, "--full-index"))
 		options->flags.full_index = 1;
 	else if (!strcmp(arg, "-a") || !strcmp(arg, "--text"))
 		options->flags.text = 1;
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 07/20] diff-parseopt: convert --full-index

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/diff.c b/diff.c
index 214728c892..3a13ba37fd 100644
--- a/diff.c
+++ b/diff.c
@@ -5131,6 +5131,8 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_CALLBACK_F(0, "binary", options, NULL,
 			       N_("output a binary diff that can be applied"),
 			       PARSE_OPT_NONEG | PARSE_OPT_NOARG, diff_opt_binary),
+		OPT_BOOL(0, "full-index", &options->flags.full_index,
+			 N_("show full pre- and post-image object names on the \"index\" lines")),
 		OPT_CALLBACK_F(0, "output-indicator-new",
 			       &options->output_indicators[OUTPUT_INDICATOR_NEW],
 			       N_("<char>"),
@@ -5244,9 +5246,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* flags options */
-	if (!strcmp(arg, "--full-index"))
-		options->flags.full_index = 1;
-	else if (!strcmp(arg, "-a") || !strcmp(arg, "--text"))
+	if (!strcmp(arg, "-a") || !strcmp(arg, "--text"))
 		options->flags.text = 1;
 	else if (!strcmp(arg, "-R"))
 		options->flags.reverse_diff = 1;
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 08/20] diff-parseopt: convert -a|--text

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/diff.c b/diff.c
index 3a13ba37fd..51d22f63fa 100644
--- a/diff.c
+++ b/diff.c
@@ -5214,6 +5214,8 @@ static void prep_parse_options(struct diff_options *options)
 			       N_("when run from subdir, exclude changes outside and show relative paths"),
 			       PARSE_OPT_NONEG | PARSE_OPT_OPTARG,
 			       diff_opt_relative),
+		OPT_BOOL('a', "text", &options->flags.text,
+			 N_("treat all files as text")),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
 		  N_("Output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5246,9 +5248,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* flags options */
-	if (!strcmp(arg, "-a") || !strcmp(arg, "--text"))
-		options->flags.text = 1;
-	else if (!strcmp(arg, "-R"))
+	if (!strcmp(arg, "-R"))
 		options->flags.reverse_diff = 1;
 	else if (!strcmp(arg, "--follow"))
 		options->flags.follow_renames = 1;
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 09/20] diff-parseopt: convert -R

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/diff.c b/diff.c
index 51d22f63fa..689dc11684 100644
--- a/diff.c
+++ b/diff.c
@@ -5216,6 +5216,8 @@ static void prep_parse_options(struct diff_options *options)
 			       diff_opt_relative),
 		OPT_BOOL('a', "text", &options->flags.text,
 			 N_("treat all files as text")),
+		OPT_BOOL('R', NULL, &options->flags.reverse_diff,
+			 N_("swap two inputs, reverse the diff")),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
 		  N_("Output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5248,9 +5250,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* flags options */
-	if (!strcmp(arg, "-R"))
-		options->flags.reverse_diff = 1;
-	else if (!strcmp(arg, "--follow"))
+	if (!strcmp(arg, "--follow"))
 		options->flags.follow_renames = 1;
 	else if (!strcmp(arg, "--no-follow")) {
 		options->flags.follow_renames = 0;
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 10/20] diff-parseopt: convert --[no-]follow

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/diff.c b/diff.c
index 689dc11684..ad813ea418 100644
--- a/diff.c
+++ b/diff.c
@@ -4986,6 +4986,21 @@ static int diff_opt_find_renames(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_follow(const struct option *opt,
+			   const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_ARG(arg);
+	if (unset) {
+		options->flags.follow_renames = 0;
+		options->flags.default_follow_renames = 0;
+	} else {
+		options->flags.follow_renames = 1;
+	}
+	return 0;
+}
+
 static enum parse_opt_result diff_opt_output(struct parse_opt_ctx_t *ctx,
 					     const struct option *opt,
 					     const char *arg, int unset)
@@ -5172,6 +5187,9 @@ static void prep_parse_options(struct diff_options *options)
 			      0, PARSE_OPT_NONEG),
 		OPT_BOOL(0, "rename-empty", &options->flags.rename_empty,
 			 N_("use empty blobs as rename source")),
+		OPT_CALLBACK_F(0, "follow", options, NULL,
+			       N_("continue listing the history of a file beyond renames"),
+			       PARSE_OPT_NOARG, diff_opt_follow),
 
 		OPT_GROUP(N_("Diff algorithm options")),
 		OPT_BIT(0, "minimal", &options->xdl_opts,
@@ -5250,12 +5268,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* flags options */
-	if (!strcmp(arg, "--follow"))
-		options->flags.follow_renames = 1;
-	else if (!strcmp(arg, "--no-follow")) {
-		options->flags.follow_renames = 0;
-		options->flags.default_follow_renames = 0;
-	} else if (skip_to_optional_arg_default(arg, "--color", &arg, "always")) {
+	if (skip_to_optional_arg_default(arg, "--color", &arg, "always")) {
 		int value = git_config_colorbool(NULL, arg);
 		if (value < 0)
 			return error("option `color' expects \"always\", \"auto\", or \"never\"");
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 11/20] diff-parseopt: convert --[no-]color

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/diff.c b/diff.c
index ad813ea418..bb36d507ec 100644
--- a/diff.c
+++ b/diff.c
@@ -5148,6 +5148,8 @@ static void prep_parse_options(struct diff_options *options)
 			       PARSE_OPT_NONEG | PARSE_OPT_NOARG, diff_opt_binary),
 		OPT_BOOL(0, "full-index", &options->flags.full_index,
 			 N_("show full pre- and post-image object names on the \"index\" lines")),
+		OPT_COLOR_FLAG(0, "color", &options->use_color,
+			       N_("show colored diff")),
 		OPT_CALLBACK_F(0, "output-indicator-new",
 			       &options->output_indicators[OUTPUT_INDICATOR_NEW],
 			       N_("<char>"),
@@ -5268,15 +5270,7 @@ int diff_opt_parse(struct diff_options *options,
 		return ac;
 
 	/* flags options */
-	if (skip_to_optional_arg_default(arg, "--color", &arg, "always")) {
-		int value = git_config_colorbool(NULL, arg);
-		if (value < 0)
-			return error("option `color' expects \"always\", \"auto\", or \"never\"");
-		options->use_color = value;
-	}
-	else if (!strcmp(arg, "--no-color"))
-		options->use_color = 0;
-	else if (!strcmp(arg, "--color-moved")) {
+	if (!strcmp(arg, "--color-moved")) {
 		if (diff_color_moved_default)
 			options->color_moved = diff_color_moved_default;
 		if (options->color_moved == COLOR_MOVED_NO)
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 12/20] diff-parseopt: convert --word-diff

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 47 +++++++++++++++++++++++++++++------------------
 1 file changed, 29 insertions(+), 18 deletions(-)

diff --git a/diff.c b/diff.c
index bb36d507ec..14c057f3df 100644
--- a/diff.c
+++ b/diff.c
@@ -5066,6 +5066,32 @@ static int diff_opt_unified(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_word_diff(const struct option *opt,
+			      const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	if (arg) {
+		if (!strcmp(arg, "plain"))
+			options->word_diff = DIFF_WORDS_PLAIN;
+		else if (!strcmp(arg, "color")) {
+			options->use_color = 1;
+			options->word_diff = DIFF_WORDS_COLOR;
+		}
+		else if (!strcmp(arg, "porcelain"))
+			options->word_diff = DIFF_WORDS_PORCELAIN;
+		else if (!strcmp(arg, "none"))
+			options->word_diff = DIFF_WORDS_NONE;
+		else
+			return error(_("bad --word-diff argument: %s"), arg);
+	} else {
+		if (options->word_diff == DIFF_WORDS_NONE)
+			options->word_diff = DIFF_WORDS_PLAIN;
+	}
+	return 0;
+}
+
 static void prep_parse_options(struct diff_options *options)
 {
 	struct option parseopts[] = {
@@ -5228,6 +5254,9 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_CALLBACK_F(0, "anchored", options, N_("<text>"),
 			       N_("generate diff using the \"anchored diff\" algorithm"),
 			       PARSE_OPT_NONEG, diff_opt_anchored),
+		OPT_CALLBACK_F(0, "word-diff", options, N_("<mode>"),
+			       N_("show word diff, using <mode> to delimit changed words"),
+			       PARSE_OPT_NONEG | PARSE_OPT_OPTARG, diff_opt_word_diff),
 
 		OPT_GROUP(N_("Diff other options")),
 		OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5291,24 +5320,6 @@ int diff_opt_parse(struct diff_options *options,
 		options->use_color = 1;
 		options->word_diff = DIFF_WORDS_COLOR;
 	}
-	else if (!strcmp(arg, "--word-diff")) {
-		if (options->word_diff == DIFF_WORDS_NONE)
-			options->word_diff = DIFF_WORDS_PLAIN;
-	}
-	else if (skip_prefix(arg, "--word-diff=", &arg)) {
-		if (!strcmp(arg, "plain"))
-			options->word_diff = DIFF_WORDS_PLAIN;
-		else if (!strcmp(arg, "color")) {
-			options->use_color = 1;
-			options->word_diff = DIFF_WORDS_COLOR;
-		}
-		else if (!strcmp(arg, "porcelain"))
-			options->word_diff = DIFF_WORDS_PORCELAIN;
-		else if (!strcmp(arg, "none"))
-			options->word_diff = DIFF_WORDS_NONE;
-		else
-			die("bad --word-diff argument: %s", arg);
-	}
 	else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) {
 		if (options->word_diff == DIFF_WORDS_NONE)
 			options->word_diff = DIFF_WORDS_PLAIN;
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 13/20] diff-parseopt: convert --word-diff-regex

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/diff.c b/diff.c
index 14c057f3df..634981723b 100644
--- a/diff.c
+++ b/diff.c
@@ -5092,6 +5092,18 @@ static int diff_opt_word_diff(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_word_diff_regex(const struct option *opt,
+				    const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	if (options->word_diff == DIFF_WORDS_NONE)
+		options->word_diff = DIFF_WORDS_PLAIN;
+	options->word_regex = arg;
+	return 0;
+}
+
 static void prep_parse_options(struct diff_options *options)
 {
 	struct option parseopts[] = {
@@ -5257,6 +5269,9 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_CALLBACK_F(0, "word-diff", options, N_("<mode>"),
 			       N_("show word diff, using <mode> to delimit changed words"),
 			       PARSE_OPT_NONEG | PARSE_OPT_OPTARG, diff_opt_word_diff),
+		OPT_CALLBACK_F(0, "word-diff-regex", options, N_("<regex>"),
+			       N_("use <regex> to decide what a word is"),
+			       PARSE_OPT_NONEG, diff_opt_word_diff_regex),
 
 		OPT_GROUP(N_("Diff other options")),
 		OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5320,12 +5335,6 @@ int diff_opt_parse(struct diff_options *options,
 		options->use_color = 1;
 		options->word_diff = DIFF_WORDS_COLOR;
 	}
-	else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) {
-		if (options->word_diff == DIFF_WORDS_NONE)
-			options->word_diff = DIFF_WORDS_PLAIN;
-		options->word_regex = optarg;
-		return argcount;
-	}
 	else if (!strcmp(arg, "--exit-code"))
 		options->flags.exit_with_status = 1;
 	else if (!strcmp(arg, "--quiet"))
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 14/20] diff-parseopt: convert --color-words

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/diff.c b/diff.c
index 634981723b..5180c2f5a9 100644
--- a/diff.c
+++ b/diff.c
@@ -4901,6 +4901,18 @@ static int diff_opt_char(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_color_words(const struct option *opt,
+				const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	options->use_color = 1;
+	options->word_diff = DIFF_WORDS_COLOR;
+	options->word_regex = arg;
+	return 0;
+}
+
 static int diff_opt_compact_summary(const struct option *opt,
 				    const char *arg, int unset)
 {
@@ -5272,6 +5284,9 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_CALLBACK_F(0, "word-diff-regex", options, N_("<regex>"),
 			       N_("use <regex> to decide what a word is"),
 			       PARSE_OPT_NONEG, diff_opt_word_diff_regex),
+		OPT_CALLBACK_F(0, "color-words", options, N_("<regex>"),
+			       N_("equivalent to --word-diff=color --word-diff-regex=<regex>"),
+			       PARSE_OPT_NONEG | PARSE_OPT_OPTARG, diff_opt_color_words),
 
 		OPT_GROUP(N_("Diff other options")),
 		OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5331,11 +5346,7 @@ int diff_opt_parse(struct diff_options *options,
 		if (cm & COLOR_MOVED_WS_ERROR)
 			return -1;
 		options->color_moved_ws_handling = cm;
-	} else if (skip_to_optional_arg_default(arg, "--color-words", &options->word_regex, NULL)) {
-		options->use_color = 1;
-		options->word_diff = DIFF_WORDS_COLOR;
-	}
-	else if (!strcmp(arg, "--exit-code"))
+	} else if (!strcmp(arg, "--exit-code"))
 		options->flags.exit_with_status = 1;
 	else if (!strcmp(arg, "--quiet"))
 		options->flags.quick = 1;
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 15/20] diff-parseopt: convert --exit-code

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/diff.c b/diff.c
index 5180c2f5a9..3f80e06de5 100644
--- a/diff.c
+++ b/diff.c
@@ -5297,6 +5297,8 @@ static void prep_parse_options(struct diff_options *options)
 			 N_("treat all files as text")),
 		OPT_BOOL('R', NULL, &options->flags.reverse_diff,
 			 N_("swap two inputs, reverse the diff")),
+		OPT_BOOL(0, "exit-code", &options->flags.exit_with_status,
+			 N_("exit with 1 if there were differences, 0 otherwise")),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
 		  N_("Output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5346,9 +5348,7 @@ int diff_opt_parse(struct diff_options *options,
 		if (cm & COLOR_MOVED_WS_ERROR)
 			return -1;
 		options->color_moved_ws_handling = cm;
-	} else if (!strcmp(arg, "--exit-code"))
-		options->flags.exit_with_status = 1;
-	else if (!strcmp(arg, "--quiet"))
+	} else if (!strcmp(arg, "--quiet"))
 		options->flags.quick = 1;
 	else if (!strcmp(arg, "--ext-diff"))
 		options->flags.allow_external = 1;
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 16/20] diff-parseopt: convert --quiet

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/diff.c b/diff.c
index 3f80e06de5..bd15269346 100644
--- a/diff.c
+++ b/diff.c
@@ -5299,6 +5299,8 @@ static void prep_parse_options(struct diff_options *options)
 			 N_("swap two inputs, reverse the diff")),
 		OPT_BOOL(0, "exit-code", &options->flags.exit_with_status,
 			 N_("exit with 1 if there were differences, 0 otherwise")),
+		OPT_BOOL(0, "quiet", &options->flags.quick,
+			 N_("disable all output of the program")),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
 		  N_("Output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5348,9 +5350,7 @@ int diff_opt_parse(struct diff_options *options,
 		if (cm & COLOR_MOVED_WS_ERROR)
 			return -1;
 		options->color_moved_ws_handling = cm;
-	} else if (!strcmp(arg, "--quiet"))
-		options->flags.quick = 1;
-	else if (!strcmp(arg, "--ext-diff"))
+	} else if (!strcmp(arg, "--ext-diff"))
 		options->flags.allow_external = 1;
 	else if (!strcmp(arg, "--no-ext-diff"))
 		options->flags.allow_external = 0;
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 17/20] diff-parseopt: convert --ext-diff

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/diff.c b/diff.c
index bd15269346..b460fa010b 100644
--- a/diff.c
+++ b/diff.c
@@ -5301,6 +5301,8 @@ static void prep_parse_options(struct diff_options *options)
 			 N_("exit with 1 if there were differences, 0 otherwise")),
 		OPT_BOOL(0, "quiet", &options->flags.quick,
 			 N_("disable all output of the program")),
+		OPT_BOOL(0, "ext-diff", &options->flags.allow_external,
+			 N_("allow an external diff helper to be executed")),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
 		  N_("Output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5350,11 +5352,7 @@ int diff_opt_parse(struct diff_options *options,
 		if (cm & COLOR_MOVED_WS_ERROR)
 			return -1;
 		options->color_moved_ws_handling = cm;
-	} else if (!strcmp(arg, "--ext-diff"))
-		options->flags.allow_external = 1;
-	else if (!strcmp(arg, "--no-ext-diff"))
-		options->flags.allow_external = 0;
-	else if (!strcmp(arg, "--textconv")) {
+	} else if (!strcmp(arg, "--textconv")) {
 		options->flags.allow_textconv = 1;
 		options->flags.textconv_set_via_cmdline = 1;
 	} else if (!strcmp(arg, "--no-textconv"))
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 18/20] diff-parseopt: convert --textconv

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/diff.c b/diff.c
index b460fa010b..a27bca527d 100644
--- a/diff.c
+++ b/diff.c
@@ -5062,6 +5062,21 @@ static int diff_opt_relative(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_textconv(const struct option *opt,
+			     const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_ARG(arg);
+	if (unset) {
+		options->flags.allow_textconv = 0;
+	} else {
+		options->flags.allow_textconv = 1;
+		options->flags.textconv_set_via_cmdline = 1;
+	}
+	return 0;
+}
+
 static int diff_opt_unified(const struct option *opt,
 			    const char *arg, int unset)
 {
@@ -5303,6 +5318,9 @@ static void prep_parse_options(struct diff_options *options)
 			 N_("disable all output of the program")),
 		OPT_BOOL(0, "ext-diff", &options->flags.allow_external,
 			 N_("allow an external diff helper to be executed")),
+		OPT_CALLBACK_F(0, "textconv", options, NULL,
+			       N_("run external text conversion filters when comparing binary files"),
+			       PARSE_OPT_NOARG, diff_opt_textconv),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
 		  N_("Output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5352,12 +5370,7 @@ int diff_opt_parse(struct diff_options *options,
 		if (cm & COLOR_MOVED_WS_ERROR)
 			return -1;
 		options->color_moved_ws_handling = cm;
-	} else if (!strcmp(arg, "--textconv")) {
-		options->flags.allow_textconv = 1;
-		options->flags.textconv_set_via_cmdline = 1;
-	} else if (!strcmp(arg, "--no-textconv"))
-		options->flags.allow_textconv = 0;
-	else if (skip_to_optional_arg_default(arg, "--ignore-submodules", &arg, "all")) {
+	} else if (skip_to_optional_arg_default(arg, "--ignore-submodules", &arg, "all")) {
 		options->flags.override_submodule_config = 1;
 		handle_ignore_submodules_arg(options, arg);
 	} else if (skip_to_optional_arg_default(arg, "--submodule", &arg, "log"))
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 19/20] diff-parseopt: convert --ignore-submodules

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/diff.c b/diff.c
index a27bca527d..6fd6106963 100644
--- a/diff.c
+++ b/diff.c
@@ -5013,6 +5013,19 @@ static int diff_opt_follow(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_ignore_submodules(const struct option *opt,
+				      const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	if (!arg)
+		arg = "all";
+	options->flags.override_submodule_config = 1;
+	handle_ignore_submodules_arg(options, arg);
+	return 0;
+}
+
 static enum parse_opt_result diff_opt_output(struct parse_opt_ctx_t *ctx,
 					     const struct option *opt,
 					     const char *arg, int unset)
@@ -5321,6 +5334,10 @@ static void prep_parse_options(struct diff_options *options)
 		OPT_CALLBACK_F(0, "textconv", options, NULL,
 			       N_("run external text conversion filters when comparing binary files"),
 			       PARSE_OPT_NOARG, diff_opt_textconv),
+		OPT_CALLBACK_F(0, "ignore-submodules", options, N_("<when>"),
+			       N_("ignore changes to submodules in the diff generation"),
+			       PARSE_OPT_NONEG | PARSE_OPT_OPTARG,
+			       diff_opt_ignore_submodules),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
 		  N_("Output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5370,9 +5387,6 @@ int diff_opt_parse(struct diff_options *options,
 		if (cm & COLOR_MOVED_WS_ERROR)
 			return -1;
 		options->color_moved_ws_handling = cm;
-	} else if (skip_to_optional_arg_default(arg, "--ignore-submodules", &arg, "all")) {
-		options->flags.override_submodule_config = 1;
-		handle_ignore_submodules_arg(options, arg);
 	} else if (skip_to_optional_arg_default(arg, "--submodule", &arg, "log"))
 		return parse_submodule_opt(options, arg);
 	else if (skip_prefix(arg, "--ws-error-highlight=", &arg))
-- 
2.21.0.rc1.337.gdf7f8d0522

[PATCH 20/20] diff-parseopt: convert --submodule

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 diff.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/diff.c b/diff.c
index 6fd6106963..ce118bb326 100644
--- a/diff.c
+++ b/diff.c
@@ -4721,14 +4721,6 @@ static int parse_dirstat_opt(struct diff_options *options, const char *params)
 	return 1;
 }
 
-static int parse_submodule_opt(struct diff_options *options, const char *value)
-{
-	if (parse_submodule_params(options, value))
-		die(_("Failed to parse --submodule option parameter: '%s'"),
-			value);
-	return 1;
-}
-
 static const char diff_status_letters[] = {
 	DIFF_STATUS_ADDED,
 	DIFF_STATUS_COPIED,
@@ -5075,6 +5067,20 @@ static int diff_opt_relative(const struct option *opt,
 	return 0;
 }
 
+static int diff_opt_submodule(const struct option *opt,
+			      const char *arg, int unset)
+{
+	struct diff_options *options = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+	if (!arg)
+		arg = "log";
+	if (parse_submodule_params(options, arg))
+		return error(_("failed to parse --submodule option parameter: '%s'"),
+			     arg);
+	return 0;
+}
+
 static int diff_opt_textconv(const struct option *opt,
 			     const char *arg, int unset)
 {
@@ -5338,6 +5344,10 @@ static void prep_parse_options(struct diff_options *options)
 			       N_("ignore changes to submodules in the diff generation"),
 			       PARSE_OPT_NONEG | PARSE_OPT_OPTARG,
 			       diff_opt_ignore_submodules),
+		OPT_CALLBACK_F(0, "submodule", options, N_("<format>"),
+			       N_("specify how differences in submodules are shown"),
+			       PARSE_OPT_NONEG | PARSE_OPT_OPTARG,
+			       diff_opt_submodule),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
 		  N_("Output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
@@ -5387,9 +5397,7 @@ int diff_opt_parse(struct diff_options *options,
 		if (cm & COLOR_MOVED_WS_ERROR)
 			return -1;
 		options->color_moved_ws_handling = cm;
-	} else if (skip_to_optional_arg_default(arg, "--submodule", &arg, "log"))
-		return parse_submodule_opt(options, arg);
-	else if (skip_prefix(arg, "--ws-error-highlight=", &arg))
+	} else if (skip_prefix(arg, "--ws-error-highlight=", &arg))
 		return parse_ws_error_highlight_opt(options, arg);
 	else if (!strcmp(arg, "--ita-invisible-in-index"))
 		options->ita_invisible_in_index = 1;
-- 
2.21.0.rc1.337.gdf7f8d0522

Re: [PATCH 16/20] diff-parseopt: convert --quiet

[Eric Sunshine]

On Tue, Mar 5, 2019 at 7:32 AM Nguyễn Thái Ngọc Duy <pclouds@gmail.com> wrote:
> diff --git a/diff.c b/diff.c
> @@ -5299,6 +5299,8 @@ static void prep_parse_options(struct diff_options *options)
> +               OPT_BOOL(0, "quiet", &options->flags.quick,
> +                        N_("disable all output of the program")),

As a reviewer, I was wondering why you didn't use OPT__QUIET() here, but...

> @@ -5348,9 +5350,7 @@ int diff_opt_parse(struct diff_options *options,
> -       } else if (!strcmp(arg, "--quiet"))
> -               options->flags.quick = 1;
> -       else if (!strcmp(arg, "--ext-diff"))

I guess the reason is that flags.quick isn't necessarily about
verbosity/quietness.

Re: [PATCH 16/20] diff-parseopt: convert --quiet

[Duy Nguyen]

On Tue, Mar 5, 2019 at 10:42 PM Eric Sunshine <sunshine@sunshineco.com> wrote:
>
> On Tue, Mar 5, 2019 at 7:32 AM Nguyễn Thái Ngọc Duy <pclouds@gmail.com> wrote:
> > diff --git a/diff.c b/diff.c
> > @@ -5299,6 +5299,8 @@ static void prep_parse_options(struct diff_options *options)
> > +               OPT_BOOL(0, "quiet", &options->flags.quick,
> > +                        N_("disable all output of the program")),
>
> As a reviewer, I was wondering why you didn't use OPT__QUIET() here, but...

It probably just didn't occur to me. After doing a couple conversions,
you kinda get in a routine and forget to question if your choice is
the right one.

> > @@ -5348,9 +5350,7 @@ int diff_opt_parse(struct diff_options *options,
> > -       } else if (!strcmp(arg, "--quiet"))
> > -               options->flags.quick = 1;
> > -       else if (!strcmp(arg, "--ext-diff"))
>
> I guess the reason is that flags.quick isn't necessarily about
> verbosity/quietness.

Also OPT__QUIET() adds the short option -q. Adding that, even if
helpful, should be done separately.
-- 
Duy