Revision 68a6e976a821ebf2b3766efb167fa716cbf8c188 authored by Junio C Hamano on 31 May 2016, 21:08:27 UTC, committed by Junio C Hamano on 31 May 2016, 21:08:27 UTC
Running tests with '-x' option to trace the individual command executions is a useful way to debug test scripts, but some tests that capture the standard error stream and check what the command said can be broken with the trace output mixed in. When running our tests under "bash", however, we can redirect the trace output to another file descriptor to keep the standard error of programs being tested intact. * jk/test-send-sh-x-trace-elsewhere: test-lib: set BASH_XTRACEFD automatically
color.c
#include "cache.h"
#include "color.h"
static int git_use_color_default = GIT_COLOR_AUTO;
int color_stdout_is_tty = -1;
/*
* The list of available column colors.
*/
const char *column_colors_ansi[] = {
GIT_COLOR_RED,
GIT_COLOR_GREEN,
GIT_COLOR_YELLOW,
GIT_COLOR_BLUE,
GIT_COLOR_MAGENTA,
GIT_COLOR_CYAN,
GIT_COLOR_BOLD_RED,
GIT_COLOR_BOLD_GREEN,
GIT_COLOR_BOLD_YELLOW,
GIT_COLOR_BOLD_BLUE,
GIT_COLOR_BOLD_MAGENTA,
GIT_COLOR_BOLD_CYAN,
GIT_COLOR_RESET,
};
/* Ignore the RESET at the end when giving the size */
const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1;
/* An individual foreground or background color. */
struct color {
enum {
COLOR_UNSPECIFIED = 0,
COLOR_NORMAL,
COLOR_ANSI, /* basic 0-7 ANSI colors */
COLOR_256,
COLOR_RGB
} type;
/* The numeric value for ANSI and 256-color modes */
unsigned char value;
/* 24-bit RGB color values */
unsigned char red, green, blue;
};
/*
* "word" is a buffer of length "len"; does it match the NUL-terminated
* "match" exactly?
*/
static int match_word(const char *word, int len, const char *match)
{
return !strncasecmp(word, match, len) && !match[len];
}
static int get_hex_color(const char *in, unsigned char *out)
{
unsigned int val;
val = (hexval(in[0]) << 4) | hexval(in[1]);
if (val & ~0xff)
return -1;
*out = val;
return 0;
}
static int parse_color(struct color *out, const char *name, int len)
{
/* Positions in array must match ANSI color codes */
static const char * const color_names[] = {
"black", "red", "green", "yellow",
"blue", "magenta", "cyan", "white"
};
char *end;
int i;
long val;
/* First try the special word "normal"... */
if (match_word(name, len, "normal")) {
out->type = COLOR_NORMAL;
return 0;
}
/* Try a 24-bit RGB value */
if (len == 7 && name[0] == '#') {
if (!get_hex_color(name + 1, &out->red) &&
!get_hex_color(name + 3, &out->green) &&
!get_hex_color(name + 5, &out->blue)) {
out->type = COLOR_RGB;
return 0;
}
}
/* Then pick from our human-readable color names... */
for (i = 0; i < ARRAY_SIZE(color_names); i++) {
if (match_word(name, len, color_names[i])) {
out->type = COLOR_ANSI;
out->value = i;
return 0;
}
}
/* And finally try a literal 256-color-mode number */
val = strtol(name, &end, 10);
if (end - name == len) {
/*
* Allow "-1" as an alias for "normal", but other negative
* numbers are bogus.
*/
if (val < -1)
; /* fall through to error */
else if (val < 0) {
out->type = COLOR_NORMAL;
return 0;
/* Rewrite low numbers as more-portable standard colors. */
} else if (val < 8) {
out->type = COLOR_ANSI;
out->value = val;
return 0;
} else if (val < 256) {
out->type = COLOR_256;
out->value = val;
return 0;
}
}
return -1;
}
static int parse_attr(const char *name, int len)
{
static const int attr_values[] = { 1, 2, 4, 5, 7,
22, 22, 24, 25, 27 };
static const char * const attr_names[] = {
"bold", "dim", "ul", "blink", "reverse",
"nobold", "nodim", "noul", "noblink", "noreverse"
};
int i;
for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
const char *str = attr_names[i];
if (!strncasecmp(name, str, len) && !str[len])
return attr_values[i];
}
return -1;
}
int color_parse(const char *value, char *dst)
{
return color_parse_mem(value, strlen(value), dst);
}
void color_set(char *dst, const char *color_bytes)
{
xsnprintf(dst, COLOR_MAXLEN, "%s", color_bytes);
}
/*
* Write the ANSI color codes for "c" to "out"; the string should
* already have the ANSI escape code in it. "out" should have enough
* space in it to fit any color.
*/
static char *color_output(char *out, int len, const struct color *c, char type)
{
switch (c->type) {
case COLOR_UNSPECIFIED:
case COLOR_NORMAL:
break;
case COLOR_ANSI:
if (len < 2)
die("BUG: color parsing ran out of space");
*out++ = type;
*out++ = '0' + c->value;
break;
case COLOR_256:
out += xsnprintf(out, len, "%c8;5;%d", type, c->value);
break;
case COLOR_RGB:
out += xsnprintf(out, len, "%c8;2;%d;%d;%d", type,
c->red, c->green, c->blue);
break;
}
return out;
}
static int color_empty(const struct color *c)
{
return c->type <= COLOR_NORMAL;
}
int color_parse_mem(const char *value, int value_len, char *dst)
{
const char *ptr = value;
int len = value_len;
char *end = dst + COLOR_MAXLEN;
unsigned int attr = 0;
struct color fg = { COLOR_UNSPECIFIED };
struct color bg = { COLOR_UNSPECIFIED };
if (!strncasecmp(value, "reset", len)) {
xsnprintf(dst, end - dst, GIT_COLOR_RESET);
return 0;
}
/* [fg [bg]] [attr]... */
while (len > 0) {
const char *word = ptr;
struct color c;
int val, wordlen = 0;
while (len > 0 && !isspace(word[wordlen])) {
wordlen++;
len--;
}
ptr = word + wordlen;
while (len > 0 && isspace(*ptr)) {
ptr++;
len--;
}
if (!parse_color(&c, word, wordlen)) {
if (fg.type == COLOR_UNSPECIFIED) {
fg = c;
continue;
}
if (bg.type == COLOR_UNSPECIFIED) {
bg = c;
continue;
}
goto bad;
}
val = parse_attr(word, wordlen);
if (0 <= val)
attr |= (1 << val);
else
goto bad;
}
#undef OUT
#define OUT(x) do { \
if (dst == end) \
die("BUG: color parsing ran out of space"); \
*dst++ = (x); \
} while(0)
if (attr || !color_empty(&fg) || !color_empty(&bg)) {
int sep = 0;
int i;
OUT('\033');
OUT('[');
for (i = 0; attr; i++) {
unsigned bit = (1 << i);
if (!(attr & bit))
continue;
attr &= ~bit;
if (sep++)
OUT(';');
dst += xsnprintf(dst, end - dst, "%d", i);
}
if (!color_empty(&fg)) {
if (sep++)
OUT(';');
/* foreground colors are all in the 3x range */
dst = color_output(dst, end - dst, &fg, '3');
}
if (!color_empty(&bg)) {
if (sep++)
OUT(';');
/* background colors are all in the 4x range */
dst = color_output(dst, end - dst, &bg, '4');
}
OUT('m');
}
OUT(0);
return 0;
bad:
return error(_("invalid color value: %.*s"), value_len, value);
#undef OUT
}
int git_config_colorbool(const char *var, const char *value)
{
if (value) {
if (!strcasecmp(value, "never"))
return 0;
if (!strcasecmp(value, "always"))
return 1;
if (!strcasecmp(value, "auto"))
return GIT_COLOR_AUTO;
}
if (!var)
return -1;
/* Missing or explicit false to turn off colorization */
if (!git_config_bool(var, value))
return 0;
/* any normal truth value defaults to 'auto' */
return GIT_COLOR_AUTO;
}
static int check_auto_color(void)
{
if (color_stdout_is_tty < 0)
color_stdout_is_tty = isatty(1);
if (color_stdout_is_tty || (pager_in_use() && pager_use_color)) {
char *term = getenv("TERM");
if (term && strcmp(term, "dumb"))
return 1;
}
return 0;
}
int want_color(int var)
{
static int want_auto = -1;
if (var < 0)
var = git_use_color_default;
if (var == GIT_COLOR_AUTO) {
if (want_auto < 0)
want_auto = check_auto_color();
return want_auto;
}
return var;
}
int git_color_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, "color.ui")) {
git_use_color_default = git_config_colorbool(var, value);
return 0;
}
return 0;
}
int git_color_default_config(const char *var, const char *value, void *cb)
{
if (git_color_config(var, value, cb) < 0)
return -1;
return git_default_config(var, value, cb);
}
void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
{
if (*color)
fprintf(fp, "%s", color);
fprintf(fp, "%s", sb->buf);
if (*color)
fprintf(fp, "%s", GIT_COLOR_RESET);
}
static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
va_list args, const char *trail)
{
int r = 0;
if (*color)
r += fprintf(fp, "%s", color);
r += vfprintf(fp, fmt, args);
if (*color)
r += fprintf(fp, "%s", GIT_COLOR_RESET);
if (trail)
r += fprintf(fp, "%s", trail);
return r;
}
int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
{
va_list args;
int r;
va_start(args, fmt);
r = color_vfprintf(fp, color, fmt, args, NULL);
va_end(args);
return r;
}
int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
{
va_list args;
int r;
va_start(args, fmt);
r = color_vfprintf(fp, color, fmt, args, "\n");
va_end(args);
return r;
}
int color_is_nil(const char *c)
{
return !strcmp(c, "NIL");
}
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