[thirdparty/git.git] / column.c

#include "git-compat-util.h"
#include "config.h"
#include "column.h"
#include "string-list.h"
#include "pager.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(const char *s)
{
	return utf8_strnwidth(s, strlen(s), 1);
}

/*
 * 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/trailing 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(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 (opts && (0 > opts->padding))
		BUG("padding must be non-negative");
	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:
		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 || pager_in_use())
			*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 strvec *argv;

	if (opts && (0 > opts->padding))
		BUG("padding must be non-negative");
	if (fd_out != -1)
		return -1;

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

	strvec_push(argv, "column");
	strvec_pushf(argv, "--raw-mode=%d", colopts);
	if (opts && opts->width)
		strvec_pushf(argv, "--width=%d", opts->width);
	if (opts && opts->indent)
		strvec_pushf(argv, "--indent=%s", opts->indent);
	if (opts && opts->padding)
		strvec_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
77f091ed	1	#include "git-compat-util.h"
b2141fc1	2	#include "config.h"
7e29b825 NTND	3	#include "column.h"
7e29b825 NTND	4	#include "string-list.h"
ca4eed70	5	#include "pager.h"
7e29b825	6	#include "parse-options.h"
b27004eb	7	#include "run-command.h"
077539d7 NTND	8	#include "utf8.h"
	9
	10	#define XY2LINEAR(d, x, y) (COL_LAYOUT((d)->colopts) == COL_COLUMN ? \
	11	(x) * (d)->rows + (y) : \
	12	(y) * (d)->cols + (x))
	13
	14	struct column_data {
	15	const struct string_list *list;
	16	unsigned int colopts;
	17	struct column_options opts;
	18
	19	int rows, cols;
	20	int len; / cell length */
3f8eccbe	21	int width; / index to the longest row in column */
077539d7 NTND	22	};
	23
	24	/* return length of 's' in letters, ANSI escapes stripped */
acbf33f8	25	static int item_length(const char *s)
077539d7	26	{
522cc87f	27	return utf8_strnwidth(s, strlen(s), 1);
077539d7 NTND	28	}
	29
	30	/*
	31	* Calculate cell width, rows and cols for a table of equal cells, given
	32	* table width and how many spaces between cells.
	33	*/
	34	static void layout(struct column_data data, int width)
	35	{
	36	int i;
	37
	38	*width = 0;
	39	for (i = 0; i < data->list->nr; i++)
	40	if (*width < data->len[i])
	41	*width = data->len[i];
	42
	43	*width += data->opts.padding;
	44
	45	data->cols = (data->opts.width - strlen(data->opts.indent)) / *width;
	46	if (data->cols == 0)
	47	data->cols = 1;
	48
	49	data->rows = DIV_ROUND_UP(data->list->nr, data->cols);
	50	}
7e29b825	51
3f8eccbe NTND	52	static void compute_column_width(struct column_data *data)
	53	{
	54	int i, x, y;
	55	for (x = 0; x < data->cols; x++) {
	56	data->width[x] = XY2LINEAR(data, x, 0);
	57	for (y = 0; y < data->rows; y++) {
	58	i = XY2LINEAR(data, x, y);
	59	if (i < data->list->nr &&
	60	data->len[data->width[x]] < data->len[i])
	61	data->width[x] = i;
	62	}
	63	}
	64	}
	65
	66	/*
	67	* Shrink all columns by shortening them one row each time (and adding
	68	* more columns along the way). Hopefully the longest cell will be
	69	* moved to the next column, column is shrunk so we have more space
	70	* for new columns. The process ends when the whole thing no longer
	71	* fits in data->total_width.
	72	*/
	73	static void shrink_columns(struct column_data *data)
	74	{
2756ca43	75	REALLOC_ARRAY(data->width, data->cols);
3f8eccbe NTND	76	while (data->rows > 1) {
	77	int x, total_width, cols, rows;
	78	rows = data->rows;
	79	cols = data->cols;
	80
	81	data->rows--;
	82	data->cols = DIV_ROUND_UP(data->list->nr, data->rows);
	83	if (data->cols != cols)
2756ca43	84	REALLOC_ARRAY(data->width, data->cols);
3f8eccbe NTND	85	compute_column_width(data);
	86
	87	total_width = strlen(data->opts.indent);
	88	for (x = 0; x < data->cols; x++) {
	89	total_width += data->len[data->width[x]];
	90	total_width += data->opts.padding;
	91	}
	92	if (total_width > data->opts.width) {
	93	data->rows = rows;
	94	data->cols = cols;
	95	break;
	96	}
	97	}
	98	compute_column_width(data);
	99	}
	100
7e29b825 NTND	101	/* Display without layout when not enabled */
	102	static void display_plain(const struct string_list *list,
	103	const char indent, const char nl)
	104	{
	105	int i;
	106
	107	for (i = 0; i < list->nr; i++)
	108	printf("%s%s%s", indent, list->items[i].string, nl);
	109	}
	110
84544f2e	111	/* Print a cell to stdout with all necessary leading/trailing space */
077539d7 NTND	112	static int display_cell(struct column_data *data, int initial_width,
	113	const char *empty_cell, int x, int y)
	114	{
	115	int i, len, newline;
	116
	117	i = XY2LINEAR(data, x, y);
	118	if (i >= data->list->nr)
	119	return -1;
3f8eccbe	120
077539d7	121	len = data->len[i];
3f8eccbe NTND	122	if (data->width && data->len[data->width[x]] < initial_width) {
	123	/*
	124	* empty_cell has initial_width chars, if real column
	125	* is narrower, increase len a bit so we fill less
	126	* space.
	127	*/
	128	len += initial_width - data->len[data->width[x]];
	129	len -= data->opts.padding;
	130	}
	131
077539d7 NTND	132	if (COL_LAYOUT(data->colopts) == COL_COLUMN)
	133	newline = i + data->rows >= data->list->nr;
	134	else
	135	newline = x == data->cols - 1 \|\| i == data->list->nr - 1;
	136
	137	printf("%s%s%s",
	138	x == 0 ? data->opts.indent : "",
	139	data->list->items[i].string,
	140	newline ? data->opts.nl : empty_cell + len);
	141	return 0;
	142	}
	143
	144	/* Display COL_COLUMN or COL_ROW */
	145	static void display_table(const struct string_list *list,
	146	unsigned int colopts,
	147	const struct column_options *opts)
	148	{
	149	struct column_data data;
	150	int x, y, i, initial_width;
	151	char *empty_cell;
	152
	153	memset(&data, 0, sizeof(data));
	154	data.list = list;
	155	data.colopts = colopts;
	156	data.opts = *opts;
	157
b32fa95f	158	ALLOC_ARRAY(data.len, list->nr);
077539d7	159	for (i = 0; i < list->nr; i++)
acbf33f8	160	data.len[i] = item_length(list->items[i].string);
077539d7 NTND	161
	162	layout(&data, &initial_width);
	163
3f8eccbe NTND	164	if (colopts & COL_DENSE)
	165	shrink_columns(&data);
	166
3733e694	167	empty_cell = xmallocz(initial_width);
077539d7	168	memset(empty_cell, ' ', initial_width);
077539d7 NTND	169	for (y = 0; y < data.rows; y++) {
	170	for (x = 0; x < data.cols; x++)
	171	if (display_cell(&data, initial_width, empty_cell, x, y))
	172	break;
	173	}
	174
	175	free(data.len);
3f8eccbe	176	free(data.width);
077539d7 NTND	177	free(empty_cell);
	178	}
	179
7e29b825 NTND	180	void print_columns(const struct string_list *list, unsigned int colopts,
	181	const struct column_options *opts)
	182	{
	183	struct column_options nopts;
	184
76fb807f KH	185	if (opts && (0 > opts->padding))
76fb807f KH	186	BUG("padding must be non-negative");
7e29b825 NTND	187	if (!list->nr)
	188	return;
	189	assert((colopts & COL_ENABLE_MASK) != COL_AUTO);
	190
	191	memset(&nopts, 0, sizeof(nopts));
	192	nopts.indent = opts && opts->indent ? opts->indent : "";
	193	nopts.nl = opts && opts->nl ? opts->nl : "\n";
	194	nopts.padding = opts ? opts->padding : 1;
	195	nopts.width = opts && opts->width ? opts->width : term_columns() - 1;
	196	if (!column_active(colopts)) {
	197	display_plain(list, "", "\n");
	198	return;
	199	}
	200	switch (COL_LAYOUT(colopts)) {
	201	case COL_PLAIN:
	202	display_plain(list, nopts.indent, nopts.nl);
	203	break;
077539d7 NTND	204	case COL_ROW:
	205	case COL_COLUMN:
	206	display_table(list, colopts, &nopts);
	207	break;
7e29b825	208	default:
033abf97	209	BUG("invalid layout mode %d", COL_LAYOUT(colopts));
7e29b825 NTND	210	}
	211	}
	212
	213	int finalize_colopts(unsigned int *colopts, int stdout_is_tty)
	214	{
	215	if ((*colopts & COL_ENABLE_MASK) == COL_AUTO) {
	216	if (stdout_is_tty < 0)
	217	stdout_is_tty = isatty(1);
	218	*colopts &= ~COL_ENABLE_MASK;
b2d3fd28	219	if (stdout_is_tty \|\| pager_in_use())
7e29b825 NTND	220	*colopts \|= COL_ENABLED;
	221	}
	222	return 0;
	223	}
	224
	225	struct colopt {
	226	const char *name;
	227	unsigned int value;
	228	unsigned int mask;
	229	};
	230
	231	#define LAYOUT_SET 1
	232	#define ENABLE_SET 2
	233
	234	static int parse_option(const char arg, int len, unsigned int colopts,
	235	int *group_set)
	236	{
	237	struct colopt opts[] = {
	238	{ "always", COL_ENABLED, COL_ENABLE_MASK },
	239	{ "never", COL_DISABLED, COL_ENABLE_MASK },
	240	{ "auto", COL_AUTO, COL_ENABLE_MASK },
	241	{ "plain", COL_PLAIN, COL_LAYOUT_MASK },
077539d7 NTND	242	{ "column", COL_COLUMN, COL_LAYOUT_MASK },
077539d7 NTND	243	{ "row", COL_ROW, COL_LAYOUT_MASK },
3f8eccbe	244	{ "dense", COL_DENSE, 0 },
7e29b825 NTND	245	};
	246	int i;
	247
	248	for (i = 0; i < ARRAY_SIZE(opts); i++) {
3f8eccbe	249	int set = 1, arg_len = len, name_len;
7e29b825 NTND	250	const char *arg_str = arg;
7e29b825 NTND	251
3f8eccbe NTND	252	if (!opts[i].mask) {
	253	if (arg_len > 2 && !strncmp(arg_str, "no", 2)) {
	254	arg_str += 2;
	255	arg_len -= 2;
	256	set = 0;
	257	}
	258	}
	259
7e29b825 NTND	260	name_len = strlen(opts[i].name);
	261	if (arg_len != name_len \|\|
	262	strncmp(arg_str, opts[i].name, name_len))
	263	continue;
	264
	265	switch (opts[i].mask) {
	266	case COL_ENABLE_MASK:
	267	*group_set \|= ENABLE_SET;
	268	break;
	269	case COL_LAYOUT_MASK:
	270	*group_set \|= LAYOUT_SET;
	271	break;
	272	}
	273
	274	if (opts[i].mask)
	275	colopts = (colopts & ~opts[i].mask) \| opts[i].value;
3f8eccbe NTND	276	else {
	277	if (set)
	278	*colopts \|= opts[i].value;
	279	else
	280	*colopts &= ~opts[i].value;
	281	}
7e29b825 NTND	282	return 0;
	283	}
	284
	285	return error("unsupported option '%s'", arg);
	286	}
	287
	288	static int parse_config(unsigned int colopts, const char value)
	289	{
	290	const char *sep = " ,";
	291	int group_set = 0;
	292
	293	while (*value) {
	294	int len = strcspn(value, sep);
	295	if (len) {
	296	if (parse_option(value, len, colopts, &group_set))
	297	return -1;
	298
	299	value += len;
	300	}
	301	value += strspn(value, sep);
	302	}
	303	/*
01689909 JL	304	* If none of "always", "never", and "auto" is specified, then setting
01689909 JL	305	* layout implies "always".
7e29b825 NTND	306	*
	307	* Current value in COL_ENABLE_MASK is disregarded. This means if
	308	* you set column.ui = auto and pass --column=row, then "auto"
	309	* will become "always".
	310	*/
	311	if ((group_set & LAYOUT_SET) && !(group_set & ENABLE_SET))
	312	colopts = (colopts & ~COL_ENABLE_MASK) \| COL_ENABLED;
	313	return 0;
	314	}
	315
	316	static int column_config(const char var, const char value,
	317	const char key, unsigned int colopts)
	318	{
	319	if (!value)
	320	return config_error_nonbool(var);
	321	if (parse_config(colopts, value))
	322	return error("invalid column.%s mode %s", key, value);
	323	return 0;
	324	}
	325
	326	int git_column_config(const char var, const char value,
	327	const char command, unsigned int colopts)
	328	{
cf4fff57 JK	329	const char *it;
	330
	331	if (!skip_prefix(var, "column.", &it))
7e29b825 NTND	332	return 0;
	333
	334	if (!strcmp(it, "ui"))
	335	return column_config(var, value, "ui", colopts);
	336
	337	if (command && !strcmp(it, command))
	338	return column_config(var, value, it, colopts);
	339
	340	return 0;
	341	}
	342
	343	int parseopt_column_callback(const struct option *opt,
	344	const char *arg, int unset)
	345	{
	346	unsigned int *colopts = opt->value;
	347	*colopts \|= COL_PARSEOPT;
	348	*colopts &= ~COL_ENABLE_MASK;
	349	if (unset) /* --no-column == never */
	350	return 0;
	351	/* --column == always unless "arg" states otherwise */
	352	*colopts \|= COL_ENABLED;
	353	if (arg)
	354	return parse_config(colopts, arg);
	355
	356	return 0;
	357	}
b27004eb NTND	358
b27004eb NTND	359	static int fd_out = -1;
d3180279	360	static struct child_process column_process = CHILD_PROCESS_INIT;
b27004eb NTND	361
	362	int run_column_filter(int colopts, const struct column_options *opts)
	363	{
ef8d7ac4	364	struct strvec *argv;
b27004eb	365
76fb807f KH	366	if (opts && (0 > opts->padding))
76fb807f KH	367	BUG("padding must be non-negative");
b27004eb NTND	368	if (fd_out != -1)
	369	return -1;
	370
8828f298	371	child_process_init(&column_process);
5eb7f7ea JK	372	argv = &column_process.args;
5eb7f7ea JK	373
ef8d7ac4 JK	374	strvec_push(argv, "column");
ef8d7ac4 JK	375	strvec_pushf(argv, "--raw-mode=%d", colopts);
5eb7f7ea	376	if (opts && opts->width)
ef8d7ac4	377	strvec_pushf(argv, "--width=%d", opts->width);
5eb7f7ea	378	if (opts && opts->indent)
ef8d7ac4	379	strvec_pushf(argv, "--indent=%s", opts->indent);
5eb7f7ea	380	if (opts && opts->padding)
ef8d7ac4	381	strvec_pushf(argv, "--padding=%d", opts->padding);
b27004eb NTND	382
b27004eb NTND	383	fflush(stdout);
b27004eb NTND	384	column_process.in = -1;
	385	column_process.out = dup(1);
	386	column_process.git_cmd = 1;
b27004eb	387
5eb7f7ea	388	if (start_command(&column_process))
b27004eb NTND	389	return -2;
	390
	391	fd_out = dup(1);
	392	close(1);
	393	dup2(column_process.in, 1);
	394	close(column_process.in);
	395	return 0;
	396	}
	397
	398	int stop_column_filter(void)
	399	{
	400	if (fd_out == -1)
	401	return -1;
	402
	403	fflush(stdout);
	404	close(1);
	405	finish_command(&column_process);
	406	dup2(fd_out, 1);
	407	close(fd_out);
	408	fd_out = -1;
	409	return 0;
	410	}