[PATCH v7 05/10] column: add column.ui for default column output settings

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 Documentation/config.txt     |   26 ++++++++++++++++++++++++++
 Documentation/git-column.txt |    6 +++++-
 builtin/column.c             |   21 +++++++++++++++++++++
 column.c                     |   28 ++++++++++++++++++++++++++++
 column.h                     |    2 ++
 5 files changed, 82 insertions(+), 1 deletions(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index abeb82b..5216598 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -821,6 +821,32 @@ color.ui::
 	`never` if you prefer git commands not to use color unless enabled
 	explicitly with some other configuration or the `--color` option.
 
+column.ui::
+	Specify whether supported commands should output in columns.
+	This variable consists of a list of tokens separated by spaces
+	or commas:
++
+--
+`always`;;
+	always show in columns
+`never`;;
+	never show in columns
+`auto`;;
+	show in columns if the output is to the terminal
+`column`;;
+	fill columns before rows (default)
+`row`;;
+	fill rows before columns
+`dense`;;
+	make unequal size columns to utilize more space
+`nodense`;;
+	make equal size columns
+`color`;;
+	input contains ANSI escape sequence for coloring
+--
++
+	This option defaults to 'never'.
+
 commit.status::
 	A boolean to enable/disable inclusion of status information in the
 	commit message template when using an editor to prepare the commit
diff --git a/Documentation/git-column.txt b/Documentation/git-column.txt
index 508b85f..94fd7ac 100644
--- a/Documentation/git-column.txt
+++ b/Documentation/git-column.txt
@@ -8,7 +8,7 @@ git-column - Display data in columns
 SYNOPSIS
 --------
 [verse]
-'git column' [--mode=<mode> | --rawmode=<n>] [--width=<width>]
+'git column' [--command=<name>] [--[raw]mode=<mode>] [--width=<width>]
 	     [--indent=<string>] [--nl=<string>] [--pading=<n>]
 
 DESCRIPTION
@@ -17,6 +17,10 @@ This command formats its input into multiple columns.
 
 OPTIONS
 -------
+--command=<name>::
+	Look up layout mode using configuration variable column.<name> and
+	column.ui.
+
 --mode=<mode>::
 	Specify layout mode. See configuration variable column.ui for option
 	syntax.
diff --git a/builtin/column.c b/builtin/column.c
index 3b0f74e..102d71b 100644
--- a/builtin/column.c
+++ b/builtin/column.c
@@ -11,12 +11,19 @@ static const char * const builtin_column_usage[] = {
 };
 static unsigned int colopts;
 
+static int column_config(const char *var, const char *value, void *cb)
+{
+	return git_column_config(var, value, cb, &colopts);
+}
+
 int cmd_column(int argc, const char **argv, const char *prefix)
 {
 	struct string_list list = STRING_LIST_INIT_DUP;
 	struct strbuf sb = STRBUF_INIT;
 	struct column_options copts;
+	const char *command = NULL, *real_command = NULL;
 	struct option options[] = {
+		OPT_STRING(0, "command", &real_command, "name", "lookup config vars"),
 		OPT_COLUMN(0, "mode", &colopts, "layout to use"),
 		OPT_INTEGER(0, "rawmode", &colopts, "layout to use"),
 		OPT_INTEGER(0, "width", &copts.width, "Maximum width"),
@@ -26,6 +33,15 @@ int cmd_column(int argc, const char **argv, const char *prefix)
 		OPT_END()
 	};
 
+	/* This one is special and must be the first one */
+	if (argc > 1 && !prefixcmp(argv[1], "--command=")) {
+		int nonitok = 0;
+		setup_git_directory_gently(&nonitok);
+
+		command = argv[1] + 10;
+		git_config(column_config, (void *)command);
+	}
+
 	memset(&copts, 0, sizeof(copts));
 	copts.width = term_columns();
 	copts.padding = 1;
@@ -33,6 +49,11 @@ int cmd_column(int argc, const char **argv, const char *prefix)
 	if (argc)
 		usage_with_options(builtin_column_usage, options);
 
+	if (real_command || command) {
+		if (!real_command || !command || strcmp(real_command, command))
+			die(_("--command must be the first argument"));
+	}
+
 	while (!strbuf_getline(&sb, stdin, '\n'))
 		string_list_append(&list, sb.buf);
 
diff --git a/column.c b/column.c
index 95faec5..67bfd06 100644
--- a/column.c
+++ b/column.c
@@ -2,6 +2,7 @@
 #include "column.h"
 #include "string-list.h"
 #include "parse-options.h"
+#include "color.h"
 #include "utf8.h"
 
 #define MODE(mode) ((mode) & COL_MODE)
@@ -361,6 +362,33 @@ int git_config_column(unsigned int *mode, const char *value,
 	return 0;
 }
 
+static int column_config(const char *var, const char *value,
+			 const char *key, unsigned int *colopts)
+{
+	if (git_config_column(colopts, value, -1))
+		return error("invalid %s mode %s", key, value);
+	return 0;
+}
+
+int git_column_config(const char *var, const char *value,
+		      const char *command, unsigned int *colopts)
+{
+	if (!strcmp(var, "column.ui"))
+		return column_config(var, value, "column.ui", colopts);
+
+	if (command) {
+		struct strbuf sb = STRBUF_INIT;
+		int ret = 0;
+		strbuf_addf(&sb, "column.%s", command);
+		if (!strcmp(var, sb.buf))
+			ret = column_config(var, value, sb.buf, colopts);
+		strbuf_release(&sb);
+		return ret;
+	}
+
+	return 0;
+}
+
 int parseopt_column_callback(const struct option *opt,
 			     const char *arg, int unset)
 {
diff --git a/column.h b/column.h
index eb03c6c..43528da 100644
--- a/column.h
+++ b/column.h
@@ -27,6 +27,8 @@ extern void print_columns(const struct string_list *list,
 			  struct column_options *opts);
 extern int git_config_column(unsigned int *mode, const char *value,
 			     int stdout_is_tty);
+extern int git_column_config(const char *var, const char *value,
+			     const char *command, unsigned int *colopts);
 
 struct option;
 extern int parseopt_column_callback(const struct option *opt,
-- 
1.7.8.36.g69ee2