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Add color output to zfs diff.

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This adds support to color zfs diff (in the style of git diff)
conditional on the ZFS_COLOR environment variable.

Signed-off-by: Ethan Coe-Renner <coerenner1@llnl.gov>
This commit is contained in:
Ethan Coe-Renner 2022-12-12 15:30:51 -08:00 committed by Tony Hutter
parent 24502bd3a7
commit fb11b1570a
4 changed files with 53 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/libzutil.h
View File

@ -170,7 +170,9 @@ struct zfs_cmd;
* List of colors to use
*/
#define ANSI_RED "\033[0;31m"
#define ANSI_GREEN "\033[0;32m"
#define ANSI_YELLOW "\033[0;33m"
#define ANSI_BLUE "\033[0;34m"
#define ANSI_RESET "\033[0m"
#define ANSI_BOLD "\033[1m"

40
lib/libzfs/libzfs_diff.c
View File

@ -44,6 +44,7 @@
#include <pthread.h>
#include <sys/zfs_ioctl.h>
#include <libzfs.h>
#include <libzutil.h>
#include "libzfs_impl.h"
#define ZDIFF_SNAPDIR "/.zfs/snapshot/"
@ -54,6 +55,10 @@
#define ZDIFF_REMOVED '-'
#define ZDIFF_RENAMED "R"
#define ZDIFF_ADDED_COLOR ANSI_GREEN
#define ZDIFF_MODIFIED_COLOR ANSI_YELLOW
#define ZDIFF_REMOVED_COLOR ANSI_RED
#define ZDIFF_RENAMED_COLOR ANSI_BLUE
/*
* Given a {dsname, object id}, get the object path
@ -128,6 +133,25 @@ stream_bytes(FILE *fp, const char *string)
}
}
/*
* Takes the type of change (like `print_file`), outputs the appropriate color
*/
static const char *
type_to_color(char type)
{
if (type == '+')
return (ZDIFF_ADDED_COLOR);
else if (type == '-')
return (ZDIFF_REMOVED_COLOR);
else if (type == 'M')
return (ZDIFF_MODIFIED_COLOR);
else if (type == 'R')
return (ZDIFF_RENAMED_COLOR);
else
return (NULL);
}
static char
get_what(mode_t what)
{
@ -175,6 +199,8 @@ static void
print_rename(FILE *fp, differ_info_t *di, const char *old, const char *new,
zfs_stat_t *isb)
{
if (isatty(fileno(fp)))
color_start(ZDIFF_RENAMED_COLOR);
if (di->timestamped)
(void) fprintf(fp, "%10lld.%09lld\t",
(longlong_t)isb->zs_ctime[0],
@ -186,12 +212,18 @@ print_rename(FILE *fp, differ_info_t *di, const char *old, const char *new,
(void) fputs(di->scripted ? "\t" : " -> ", fp);
print_cmn(fp, di, new);
(void) fputc('\n', fp);
if (isatty(fileno(fp)))
color_end();
}
static void
print_link_change(FILE *fp, differ_info_t *di, int delta, const char *file,
zfs_stat_t *isb)
{
if (isatty(fileno(fp)))
color_start(ZDIFF_MODIFIED_COLOR);
if (di->timestamped)
(void) fprintf(fp, "%10lld.%09lld\t",
(longlong_t)isb->zs_ctime[0],
@ -201,12 +233,17 @@ print_link_change(FILE *fp, differ_info_t *di, int delta, const char *file,
(void) fprintf(fp, "%c\t", get_what(isb->zs_mode));
print_cmn(fp, di, file);
(void) fprintf(fp, "\t(%+d)\n", delta);
if (isatty(fileno(fp)))
color_end();
}
static void
print_file(FILE *fp, differ_info_t *di, char type, const char *file,
zfs_stat_t *isb)
{
if (isatty(fileno(fp)))
color_start(type_to_color(type));
if (di->timestamped)
(void) fprintf(fp, "%10lld.%09lld\t",
(longlong_t)isb->zs_ctime[0],
@ -216,6 +253,9 @@ print_file(FILE *fp, differ_info_t *di, char type, const char *file,
(void) fprintf(fp, "%c\t", get_what(isb->zs_mode));
print_cmn(fp, di, file);
(void) fputc('\n', fp);
if (isatty(fileno(fp)))
color_end();
}
static int

9
lib/libzfs/libzfs_util.c
View File

@ -2010,15 +2010,20 @@ use_color(void)
void
color_start(const char *color)
{
if (use_color())
if (use_color()) {
fputs(color, stdout);
fflush(stdout);
}
}
void
color_end(void)
{
if (use_color())
if (use_color()) {
fputs(ANSI_RESET, stdout);
fflush(stdout);
}
}
/* printf() with a color. If color is NULL, then do a normal printf. */

4
man/man8/zfs.8
View File

@ -737,6 +737,10 @@ command will be undone if the share is ever unshared (like via a reboot).
.
.Sh ENVIRONMENT VARIABLES
.Bl -tag -width "ZFS_MODULE_TIMEOUT"
.It Sy ZFS_COLOR
Use ANSI color in
.Nm zfs Cm diff
output.
.It Sy ZFS_MOUNT_HELPER
Cause
.Nm zfs Cm mount