[thirdparty/git.git] / column.c

#include "cache.h"
#include "column.h"
#include "string-list.h"
#include "parse-options.h"
#include "run-command.h"
#include "utf8.h"

#define XY2LINEAR(d, x, y) (COL_LAYOUT((d)->colopts) == COL_COLUMN ? \
			    (x) * (d)->rows + (y) : \
			    (y) * (d)->cols + (x))

struct column_data {
	const struct string_list *list;
	unsigned int colopts;
	struct column_options opts;

	int rows, cols;
	int *len;		/* cell length */
	int *width;	      /* index to the longest row in column */
};

/* return length of 's' in letters, ANSI escapes stripped */
static int item_length(unsigned int colopts, const char *s)
{
	int len, i = 0;
	struct strbuf str = STRBUF_INIT;

	strbuf_addstr(&str, s);
	while ((s = strstr(str.buf + i, "\033[")) != NULL) {
		int len = strspn(s + 2, "0123456789;");
		i = s - str.buf;
		strbuf_remove(&str, i, len + 3); /* \033[<len><func char> */
	}
	len = utf8_strwidth(str.buf);
	strbuf_release(&str);
	return len;
}

/*
 * Calculate cell width, rows and cols for a table of equal cells, given
 * table width and how many spaces between cells.
 */
static void layout(struct column_data *data, int *width)
{
	int i;

	*width = 0;
	for (i = 0; i < data->list->nr; i++)
		if (*width < data->len[i])
			*width = data->len[i];

	*width += data->opts.padding;

	data->cols = (data->opts.width - strlen(data->opts.indent)) / *width;
	if (data->cols == 0)
		data->cols = 1;

	data->rows = DIV_ROUND_UP(data->list->nr, data->cols);
}

static void compute_column_width(struct column_data *data)
{
	int i, x, y;
	for (x = 0; x < data->cols; x++) {
		data->width[x] = XY2LINEAR(data, x, 0);
		for (y = 0; y < data->rows; y++) {
			i = XY2LINEAR(data, x, y);
			if (i < data->list->nr &&
			    data->len[data->width[x]] < data->len[i])
				data->width[x] = i;
		}
	}
}

/*
 * Shrink all columns by shortening them one row each time (and adding
 * more columns along the way). Hopefully the longest cell will be
 * moved to the next column, column is shrunk so we have more space
 * for new columns. The process ends when the whole thing no longer
 * fits in data->total_width.
 */
static void shrink_columns(struct column_data *data)
{
	REALLOC_ARRAY(data->width, data->cols);
	while (data->rows > 1) {
		int x, total_width, cols, rows;
		rows = data->rows;
		cols = data->cols;

		data->rows--;
		data->cols = DIV_ROUND_UP(data->list->nr, data->rows);
		if (data->cols != cols)
			REALLOC_ARRAY(data->width, data->cols);
		compute_column_width(data);

		total_width = strlen(data->opts.indent);
		for (x = 0; x < data->cols; x++) {
			total_width += data->len[data->width[x]];
			total_width += data->opts.padding;
		}
		if (total_width > data->opts.width) {
			data->rows = rows;
			data->cols = cols;
			break;
		}
	}
	compute_column_width(data);
}

/* Display without layout when not enabled */
static void display_plain(const struct string_list *list,
			  const char *indent, const char *nl)
{
	int i;

	for (i = 0; i < list->nr; i++)
		printf("%s%s%s", indent, list->items[i].string, nl);
}

/* Print a cell to stdout with all necessary leading/traling space */
static int display_cell(struct column_data *data, int initial_width,
			const char *empty_cell, int x, int y)
{
	int i, len, newline;

	i = XY2LINEAR(data, x, y);
	if (i >= data->list->nr)
		return -1;

	len = data->len[i];
	if (data->width && data->len[data->width[x]] < initial_width) {
		/*
		 * empty_cell has initial_width chars, if real column
		 * is narrower, increase len a bit so we fill less
		 * space.
		 */
		len += initial_width - data->len[data->width[x]];
		len -= data->opts.padding;
	}

	if (COL_LAYOUT(data->colopts) == COL_COLUMN)
		newline = i + data->rows >= data->list->nr;
	else
		newline = x == data->cols - 1 || i == data->list->nr - 1;

	printf("%s%s%s",
	       x == 0 ? data->opts.indent : "",
	       data->list->items[i].string,
	       newline ? data->opts.nl : empty_cell + len);
	return 0;
}

/* Display COL_COLUMN or COL_ROW */
static void display_table(const struct string_list *list,
			  unsigned int colopts,
			  const struct column_options *opts)
{
	struct column_data data;
	int x, y, i, initial_width;
	char *empty_cell;

	memset(&data, 0, sizeof(data));
	data.list = list;
	data.colopts = colopts;
	data.opts = *opts;

	ALLOC_ARRAY(data.len, list->nr);
	for (i = 0; i < list->nr; i++)
		data.len[i] = item_length(colopts, list->items[i].string);

	layout(&data, &initial_width);

	if (colopts & COL_DENSE)
		shrink_columns(&data);

	empty_cell = xmallocz(initial_width);
	memset(empty_cell, ' ', initial_width);
	for (y = 0; y < data.rows; y++) {
		for (x = 0; x < data.cols; x++)
			if (display_cell(&data, initial_width, empty_cell, x, y))
				break;
	}

	free(data.len);
	free(data.width);
	free(empty_cell);
}

void print_columns(const struct string_list *list, unsigned int colopts,
		   const struct column_options *opts)
{
	struct column_options nopts;

	if (!list->nr)
		return;
	assert((colopts & COL_ENABLE_MASK) != COL_AUTO);

	memset(&nopts, 0, sizeof(nopts));
	nopts.indent = opts && opts->indent ? opts->indent : "";
	nopts.nl = opts && opts->nl ? opts->nl : "\n";
	nopts.padding = opts ? opts->padding : 1;
	nopts.width = opts && opts->width ? opts->width : term_columns() - 1;
	if (!column_active(colopts)) {
		display_plain(list, "", "\n");
		return;
	}
	switch (COL_LAYOUT(colopts)) {
	case COL_PLAIN:
		display_plain(list, nopts.indent, nopts.nl);
		break;
	case COL_ROW:
	case COL_COLUMN:
		display_table(list, colopts, &nopts);
		break;
	default:
		die("BUG: invalid layout mode %d", COL_LAYOUT(colopts));
	}
}

int finalize_colopts(unsigned int *colopts, int stdout_is_tty)
{
	if ((*colopts & COL_ENABLE_MASK) == COL_AUTO) {
		if (stdout_is_tty < 0)
			stdout_is_tty = isatty(1);
		*colopts &= ~COL_ENABLE_MASK;
		if (stdout_is_tty)
			*colopts |= COL_ENABLED;
	}
	return 0;
}

struct colopt {
	const char *name;
	unsigned int value;
	unsigned int mask;
};

#define LAYOUT_SET 1
#define ENABLE_SET 2

static int parse_option(const char *arg, int len, unsigned int *colopts,
			int *group_set)
{
	struct colopt opts[] = {
		{ "always", COL_ENABLED,  COL_ENABLE_MASK },
		{ "never",  COL_DISABLED, COL_ENABLE_MASK },
		{ "auto",   COL_AUTO,     COL_ENABLE_MASK },
		{ "plain",  COL_PLAIN,    COL_LAYOUT_MASK },
		{ "column", COL_COLUMN,   COL_LAYOUT_MASK },
		{ "row",    COL_ROW,      COL_LAYOUT_MASK },
		{ "dense",  COL_DENSE,    0 },
	};
	int i;

	for (i = 0; i < ARRAY_SIZE(opts); i++) {
		int set = 1, arg_len = len, name_len;
		const char *arg_str = arg;

		if (!opts[i].mask) {
			if (arg_len > 2 && !strncmp(arg_str, "no", 2)) {
				arg_str += 2;
				arg_len -= 2;
				set = 0;
			}
		}

		name_len = strlen(opts[i].name);
		if (arg_len != name_len ||
		    strncmp(arg_str, opts[i].name, name_len))
			continue;

		switch (opts[i].mask) {
		case COL_ENABLE_MASK:
			*group_set |= ENABLE_SET;
			break;
		case COL_LAYOUT_MASK:
			*group_set |= LAYOUT_SET;
			break;
		}

		if (opts[i].mask)
			*colopts = (*colopts & ~opts[i].mask) | opts[i].value;
		else {
			if (set)
				*colopts |= opts[i].value;
			else
				*colopts &= ~opts[i].value;
		}
		return 0;
	}

	return error("unsupported option '%s'", arg);
}

static int parse_config(unsigned int *colopts, const char *value)
{
	const char *sep = " ,";
	int group_set = 0;

	while (*value) {
		int len = strcspn(value, sep);
		if (len) {
			if (parse_option(value, len, colopts, &group_set))
				return -1;

			value += len;
		}
		value += strspn(value, sep);
	}
	/*
	 * If none of "always", "never", and "auto" is specified, then setting
	 * layout implies "always".
	 *
	 * Current value in COL_ENABLE_MASK is disregarded. This means if
	 * you set column.ui = auto and pass --column=row, then "auto"
	 * will become "always".
	 */
	if ((group_set & LAYOUT_SET) && !(group_set & ENABLE_SET))
		*colopts = (*colopts & ~COL_ENABLE_MASK) | COL_ENABLED;
	return 0;
}

static int column_config(const char *var, const char *value,
			 const char *key, unsigned int *colopts)
{
	if (!value)
		return config_error_nonbool(var);
	if (parse_config(colopts, value))
		return error("invalid column.%s mode %s", key, value);
	return 0;
}

int git_column_config(const char *var, const char *value,
		      const char *command, unsigned int *colopts)
{
	const char *it;

	if (!skip_prefix(var, "column.", &it))
		return 0;

	if (!strcmp(it, "ui"))
		return column_config(var, value, "ui", colopts);

	if (command && !strcmp(it, command))
		return column_config(var, value, it, colopts);

	return 0;
}

int parseopt_column_callback(const struct option *opt,
			     const char *arg, int unset)
{
	unsigned int *colopts = opt->value;
	*colopts |= COL_PARSEOPT;
	*colopts &= ~COL_ENABLE_MASK;
	if (unset)		/* --no-column == never */
		return 0;
	/* --column == always unless "arg" states otherwise */
	*colopts |= COL_ENABLED;
	if (arg)
		return parse_config(colopts, arg);

	return 0;
}

static int fd_out = -1;
static struct child_process column_process = CHILD_PROCESS_INIT;

int run_column_filter(int colopts, const struct column_options *opts)
{
	struct argv_array *argv;

	if (fd_out != -1)
		return -1;

	child_process_init(&column_process);
	argv = &column_process.args;

	argv_array_push(argv, "column");
	argv_array_pushf(argv, "--raw-mode=%d", colopts);
	if (opts && opts->width)
		argv_array_pushf(argv, "--width=%d", opts->width);
	if (opts && opts->indent)
		argv_array_pushf(argv, "--indent=%s", opts->indent);
	if (opts && opts->padding)
		argv_array_pushf(argv, "--padding=%d", opts->padding);

	fflush(stdout);
	column_process.in = -1;
	column_process.out = dup(1);
	column_process.git_cmd = 1;

	if (start_command(&column_process))
		return -2;

	fd_out = dup(1);
	close(1);
	dup2(column_process.in, 1);
	close(column_process.in);
	return 0;
}

int stop_column_filter(void)
{
	if (fd_out == -1)
		return -1;

	fflush(stdout);
	close(1);
	finish_command(&column_process);
	dup2(fd_out, 1);
	close(fd_out);
	fd_out = -1;
	return 0;
}
Commit	Line	Data
7e29b825 NTND	1	#include "cache.h"
	2	#include "column.h"
	3	#include "string-list.h"
	4	#include "parse-options.h"
b27004eb	5	#include "run-command.h"
077539d7 NTND	6	#include "utf8.h"
	7
	8	#define XY2LINEAR(d, x, y) (COL_LAYOUT((d)->colopts) == COL_COLUMN ? \
	9	(x) * (d)->rows + (y) : \
	10	(y) * (d)->cols + (x))
	11
	12	struct column_data {
	13	const struct string_list *list;
	14	unsigned int colopts;
	15	struct column_options opts;
	16
	17	int rows, cols;
	18	int len; / cell length */
3f8eccbe	19	int width; / index to the longest row in column */
077539d7 NTND	20	};
	21
	22	/* return length of 's' in letters, ANSI escapes stripped */
	23	static int item_length(unsigned int colopts, const char *s)
	24	{
	25	int len, i = 0;
	26	struct strbuf str = STRBUF_INIT;
	27
	28	strbuf_addstr(&str, s);
	29	while ((s = strstr(str.buf + i, "\033[")) != NULL) {
	30	int len = strspn(s + 2, "0123456789;");
	31	i = s - str.buf;
	32	strbuf_remove(&str, i, len + 3); /* \033[<len><func char> */
	33	}
	34	len = utf8_strwidth(str.buf);
	35	strbuf_release(&str);
	36	return len;
	37	}
	38
	39	/*
	40	* Calculate cell width, rows and cols for a table of equal cells, given
	41	* table width and how many spaces between cells.
	42	*/
	43	static void layout(struct column_data data, int width)
	44	{
	45	int i;
	46
	47	*width = 0;
	48	for (i = 0; i < data->list->nr; i++)
	49	if (*width < data->len[i])
	50	*width = data->len[i];
	51
	52	*width += data->opts.padding;
	53
	54	data->cols = (data->opts.width - strlen(data->opts.indent)) / *width;
	55	if (data->cols == 0)
	56	data->cols = 1;
	57
	58	data->rows = DIV_ROUND_UP(data->list->nr, data->cols);
	59	}
7e29b825	60
3f8eccbe NTND	61	static void compute_column_width(struct column_data *data)
	62	{
	63	int i, x, y;
	64	for (x = 0; x < data->cols; x++) {
	65	data->width[x] = XY2LINEAR(data, x, 0);
	66	for (y = 0; y < data->rows; y++) {
	67	i = XY2LINEAR(data, x, y);
	68	if (i < data->list->nr &&
	69	data->len[data->width[x]] < data->len[i])
	70	data->width[x] = i;
	71	}
	72	}
	73	}
	74
	75	/*
	76	* Shrink all columns by shortening them one row each time (and adding
	77	* more columns along the way). Hopefully the longest cell will be
	78	* moved to the next column, column is shrunk so we have more space
	79	* for new columns. The process ends when the whole thing no longer
	80	* fits in data->total_width.
	81	*/
	82	static void shrink_columns(struct column_data *data)
	83	{
2756ca43	84	REALLOC_ARRAY(data->width, data->cols);
3f8eccbe NTND	85	while (data->rows > 1) {
	86	int x, total_width, cols, rows;
	87	rows = data->rows;
	88	cols = data->cols;
	89
	90	data->rows--;
	91	data->cols = DIV_ROUND_UP(data->list->nr, data->rows);
	92	if (data->cols != cols)
2756ca43	93	REALLOC_ARRAY(data->width, data->cols);
3f8eccbe NTND	94	compute_column_width(data);
	95
	96	total_width = strlen(data->opts.indent);
	97	for (x = 0; x < data->cols; x++) {
	98	total_width += data->len[data->width[x]];
	99	total_width += data->opts.padding;
	100	}
	101	if (total_width > data->opts.width) {
	102	data->rows = rows;
	103	data->cols = cols;
	104	break;
	105	}
	106	}
	107	compute_column_width(data);
	108	}
	109
7e29b825 NTND	110	/* Display without layout when not enabled */
	111	static void display_plain(const struct string_list *list,
	112	const char indent, const char nl)
	113	{
	114	int i;
	115
	116	for (i = 0; i < list->nr; i++)
	117	printf("%s%s%s", indent, list->items[i].string, nl);
	118	}
	119
077539d7 NTND	120	/* Print a cell to stdout with all necessary leading/traling space */
	121	static int display_cell(struct column_data *data, int initial_width,
	122	const char *empty_cell, int x, int y)
	123	{
	124	int i, len, newline;
	125
	126	i = XY2LINEAR(data, x, y);
	127	if (i >= data->list->nr)
	128	return -1;
3f8eccbe	129
077539d7	130	len = data->len[i];
3f8eccbe NTND	131	if (data->width && data->len[data->width[x]] < initial_width) {
	132	/*
	133	* empty_cell has initial_width chars, if real column
	134	* is narrower, increase len a bit so we fill less
	135	* space.
	136	*/
	137	len += initial_width - data->len[data->width[x]];
	138	len -= data->opts.padding;
	139	}
	140
077539d7 NTND	141	if (COL_LAYOUT(data->colopts) == COL_COLUMN)
	142	newline = i + data->rows >= data->list->nr;
	143	else
	144	newline = x == data->cols - 1 \|\| i == data->list->nr - 1;
	145
	146	printf("%s%s%s",
	147	x == 0 ? data->opts.indent : "",
	148	data->list->items[i].string,
	149	newline ? data->opts.nl : empty_cell + len);
	150	return 0;
	151	}
	152
	153	/* Display COL_COLUMN or COL_ROW */
	154	static void display_table(const struct string_list *list,
	155	unsigned int colopts,
	156	const struct column_options *opts)
	157	{
	158	struct column_data data;
	159	int x, y, i, initial_width;
	160	char *empty_cell;
	161
	162	memset(&data, 0, sizeof(data));
	163	data.list = list;
	164	data.colopts = colopts;
	165	data.opts = *opts;
	166
b32fa95f	167	ALLOC_ARRAY(data.len, list->nr);
077539d7 NTND	168	for (i = 0; i < list->nr; i++)
	169	data.len[i] = item_length(colopts, list->items[i].string);
	170
	171	layout(&data, &initial_width);
	172
3f8eccbe NTND	173	if (colopts & COL_DENSE)
	174	shrink_columns(&data);
	175
3733e694	176	empty_cell = xmallocz(initial_width);
077539d7	177	memset(empty_cell, ' ', initial_width);
077539d7 NTND	178	for (y = 0; y < data.rows; y++) {
	179	for (x = 0; x < data.cols; x++)
	180	if (display_cell(&data, initial_width, empty_cell, x, y))
	181	break;
	182	}
	183
	184	free(data.len);
3f8eccbe	185	free(data.width);
077539d7 NTND	186	free(empty_cell);
	187	}
	188
7e29b825 NTND	189	void print_columns(const struct string_list *list, unsigned int colopts,
	190	const struct column_options *opts)
	191	{
	192	struct column_options nopts;
	193
	194	if (!list->nr)
	195	return;
	196	assert((colopts & COL_ENABLE_MASK) != COL_AUTO);
	197
	198	memset(&nopts, 0, sizeof(nopts));
	199	nopts.indent = opts && opts->indent ? opts->indent : "";
	200	nopts.nl = opts && opts->nl ? opts->nl : "\n";
	201	nopts.padding = opts ? opts->padding : 1;
	202	nopts.width = opts && opts->width ? opts->width : term_columns() - 1;
	203	if (!column_active(colopts)) {
	204	display_plain(list, "", "\n");
	205	return;
	206	}
	207	switch (COL_LAYOUT(colopts)) {
	208	case COL_PLAIN:
	209	display_plain(list, nopts.indent, nopts.nl);
	210	break;
077539d7 NTND	211	case COL_ROW:
	212	case COL_COLUMN:
	213	display_table(list, colopts, &nopts);
	214	break;
7e29b825 NTND	215	default:
	216	die("BUG: invalid layout mode %d", COL_LAYOUT(colopts));
	217	}
	218	}
	219
	220	int finalize_colopts(unsigned int *colopts, int stdout_is_tty)
	221	{
	222	if ((*colopts & COL_ENABLE_MASK) == COL_AUTO) {
	223	if (stdout_is_tty < 0)
	224	stdout_is_tty = isatty(1);
	225	*colopts &= ~COL_ENABLE_MASK;
	226	if (stdout_is_tty)
	227	*colopts \|= COL_ENABLED;
	228	}
	229	return 0;
	230	}
	231
	232	struct colopt {
	233	const char *name;
	234	unsigned int value;
	235	unsigned int mask;
	236	};
	237
	238	#define LAYOUT_SET 1
	239	#define ENABLE_SET 2
	240
	241	static int parse_option(const char arg, int len, unsigned int colopts,
	242	int *group_set)
	243	{
	244	struct colopt opts[] = {
	245	{ "always", COL_ENABLED, COL_ENABLE_MASK },
	246	{ "never", COL_DISABLED, COL_ENABLE_MASK },
	247	{ "auto", COL_AUTO, COL_ENABLE_MASK },
	248	{ "plain", COL_PLAIN, COL_LAYOUT_MASK },
077539d7 NTND	249	{ "column", COL_COLUMN, COL_LAYOUT_MASK },
077539d7 NTND	250	{ "row", COL_ROW, COL_LAYOUT_MASK },
3f8eccbe	251	{ "dense", COL_DENSE, 0 },
7e29b825 NTND	252	};
	253	int i;
	254
	255	for (i = 0; i < ARRAY_SIZE(opts); i++) {
3f8eccbe	256	int set = 1, arg_len = len, name_len;
7e29b825 NTND	257	const char *arg_str = arg;
7e29b825 NTND	258
3f8eccbe NTND	259	if (!opts[i].mask) {
	260	if (arg_len > 2 && !strncmp(arg_str, "no", 2)) {
	261	arg_str += 2;
	262	arg_len -= 2;
	263	set = 0;
	264	}
	265	}
	266
7e29b825 NTND	267	name_len = strlen(opts[i].name);
	268	if (arg_len != name_len \|\|
	269	strncmp(arg_str, opts[i].name, name_len))
	270	continue;
	271
	272	switch (opts[i].mask) {
	273	case COL_ENABLE_MASK:
	274	*group_set \|= ENABLE_SET;
	275	break;
	276	case COL_LAYOUT_MASK:
	277	*group_set \|= LAYOUT_SET;
	278	break;
	279	}
	280
	281	if (opts[i].mask)
	282	colopts = (colopts & ~opts[i].mask) \| opts[i].value;
3f8eccbe NTND	283	else {
	284	if (set)
	285	*colopts \|= opts[i].value;
	286	else
	287	*colopts &= ~opts[i].value;
	288	}
7e29b825 NTND	289	return 0;
	290	}
	291
	292	return error("unsupported option '%s'", arg);
	293	}
	294
	295	static int parse_config(unsigned int colopts, const char value)
	296	{
	297	const char *sep = " ,";
	298	int group_set = 0;
	299
	300	while (*value) {
	301	int len = strcspn(value, sep);
	302	if (len) {
	303	if (parse_option(value, len, colopts, &group_set))
	304	return -1;
	305
	306	value += len;
	307	}
	308	value += strspn(value, sep);
	309	}
	310	/*
01689909 JL	311	* If none of "always", "never", and "auto" is specified, then setting
01689909 JL	312	* layout implies "always".
7e29b825 NTND	313	*
	314	* Current value in COL_ENABLE_MASK is disregarded. This means if
	315	* you set column.ui = auto and pass --column=row, then "auto"
	316	* will become "always".
	317	*/
	318	if ((group_set & LAYOUT_SET) && !(group_set & ENABLE_SET))
	319	colopts = (colopts & ~COL_ENABLE_MASK) \| COL_ENABLED;
	320	return 0;
	321	}
	322
	323	static int column_config(const char var, const char value,
	324	const char key, unsigned int colopts)
	325	{
	326	if (!value)
	327	return config_error_nonbool(var);
	328	if (parse_config(colopts, value))
	329	return error("invalid column.%s mode %s", key, value);
	330	return 0;
	331	}
	332
	333	int git_column_config(const char var, const char value,
	334	const char command, unsigned int colopts)
	335	{
cf4fff57 JK	336	const char *it;
	337
	338	if (!skip_prefix(var, "column.", &it))
7e29b825 NTND	339	return 0;
	340
	341	if (!strcmp(it, "ui"))
	342	return column_config(var, value, "ui", colopts);
	343
	344	if (command && !strcmp(it, command))
	345	return column_config(var, value, it, colopts);
	346
	347	return 0;
	348	}
	349
	350	int parseopt_column_callback(const struct option *opt,
	351	const char *arg, int unset)
	352	{
	353	unsigned int *colopts = opt->value;
	354	*colopts \|= COL_PARSEOPT;
	355	*colopts &= ~COL_ENABLE_MASK;
	356	if (unset) /* --no-column == never */
	357	return 0;
	358	/* --column == always unless "arg" states otherwise */
	359	*colopts \|= COL_ENABLED;
	360	if (arg)
	361	return parse_config(colopts, arg);
	362
	363	return 0;
	364	}
b27004eb NTND	365
b27004eb NTND	366	static int fd_out = -1;
d3180279	367	static struct child_process column_process = CHILD_PROCESS_INIT;
b27004eb NTND	368
	369	int run_column_filter(int colopts, const struct column_options *opts)
	370	{
5eb7f7ea	371	struct argv_array *argv;
b27004eb NTND	372
	373	if (fd_out != -1)
	374	return -1;
	375
8828f298	376	child_process_init(&column_process);
5eb7f7ea JK	377	argv = &column_process.args;
	378
	379	argv_array_push(argv, "column");
	380	argv_array_pushf(argv, "--raw-mode=%d", colopts);
	381	if (opts && opts->width)
	382	argv_array_pushf(argv, "--width=%d", opts->width);
	383	if (opts && opts->indent)
	384	argv_array_pushf(argv, "--indent=%s", opts->indent);
	385	if (opts && opts->padding)
	386	argv_array_pushf(argv, "--padding=%d", opts->padding);
b27004eb NTND	387
b27004eb NTND	388	fflush(stdout);
b27004eb NTND	389	column_process.in = -1;
	390	column_process.out = dup(1);
	391	column_process.git_cmd = 1;
b27004eb	392
5eb7f7ea	393	if (start_command(&column_process))
b27004eb NTND	394	return -2;
	395
	396	fd_out = dup(1);
	397	close(1);
	398	dup2(column_process.in, 1);
	399	close(column_process.in);
	400	return 0;
	401	}
	402
	403	int stop_column_filter(void)
	404	{
	405	if (fd_out == -1)
	406	return -1;
	407
	408	fflush(stdout);
	409	close(1);
	410	finish_command(&column_process);
	411	dup2(fd_out, 1);
	412	close(fd_out);
	413	fd_out = -1;
	414	return 0;
	415	}