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Repart: Add support for machine readably report 

Add --json command line argument that prints all relevant information
in a machine-readable format.
This commit is contained in:
Tobias Hunger 2020-06-28 18:19:05 +02:00
parent 2ac7eec3b5
commit a015fbe7ef
2 changed files with 74 additions and 15 deletions
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9
man/systemd-repart.xml
View File

@ -265,6 +265,15 @@
and graphic illustrating the changes applied.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--json=</option><replaceable>MODE</replaceable></term>
<listitem><para>Shows output formatted as JSON. Expects one of <literal>short</literal> (for the
shortest possible output without any redundant whitespace or line breaks), <literal>pretty</literal>
(for a pretty version of the same, with indentation and line breaks) or <literal>off</literal> (to turn
off json output).</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--definitions=</option></term>

80
src/partition/repart.c
View File

@ -33,6 +33,7 @@
#include "fs-util.h"
#include "gpt.h"
#include "id128-util.h"
#include "json.h"
#include "list.h"
#include "locale-util.h"
#include "main-func.h"
@ -79,6 +80,8 @@ static sd_id128_t arg_seed = SD_ID128_NULL;
static bool arg_randomize = false;
static int arg_pretty = -1;
static uint64_t arg_size = UINT64_MAX;
static bool arg_json = false;
static JsonFormatFlags arg_json_format_flags = 0;
STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
STATIC_DESTRUCTOR_REGISTER(arg_definitions, freep);
@ -1620,12 +1623,23 @@ static int context_dump_partitions(Context *context, const char *node) {
Partition *p;
int r;
t = table_new("type", "label", "uuid", "file", "node", "offset", "raw size", "size", "raw padding", "padding");
if (!arg_json && context->n_partitions == 0) {
log_info("Empty partition table.");
return 0;
}
t = table_new("type", "label", "uuid", "file", "node", "offset", "old size", "raw size", "size", "old padding", "raw padding", "padding", "activity");
if (!t)
return log_oom();
if (!DEBUG_LOGGING)
(void) table_set_display(t, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4, (size_t) 7, (size_t) 9, (size_t) -1);
if (!DEBUG_LOGGING) {
if (arg_json)
(void) table_set_display(t, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4,
(size_t) 5, (size_t) 6, (size_t) 7, (size_t) 9, (size_t) 10, (size_t) 12, (size_t) -1);
else
(void) table_set_display(t, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4,
(size_t) 8, (size_t) 11, (size_t) -1);
}
(void) table_set_align_percent(t, table_get_cell(t, 0, 4), 100);
(void) table_set_align_percent(t, table_get_cell(t, 0, 5), 100);
@ -1633,11 +1647,16 @@ static int context_dump_partitions(Context *context, const char *node) {
LIST_FOREACH(partitions, p, context->partitions) {
_cleanup_free_ char *size_change = NULL, *padding_change = NULL, *partname = NULL;
char uuid_buffer[ID128_UUID_STRING_MAX];
const char *label;
const char *label, *activity = NULL;
if (p->dropped)
continue;
if (p->current_size == UINT64_MAX)
activity = "create";
else if (p->current_size != p->new_size)
activity = "resize";
label = partition_label(p);
partname = p->partno != UINT64_MAX ? fdisk_partname(node, p->partno+1) : NULL;
@ -1660,17 +1679,20 @@ static int context_dump_partitions(Context *context, const char *node) {
TABLE_STRING, label ?: "-", TABLE_SET_COLOR, label ? NULL : ansi_grey(),
TABLE_UUID, sd_id128_is_null(p->new_uuid) ? p->current_uuid : p->new_uuid,
TABLE_STRING, p->definition_path ? basename(p->definition_path) : "-", TABLE_SET_COLOR, p->definition_path ? NULL : ansi_grey(),
TABLE_STRING, partname ?: "no", TABLE_SET_COLOR, partname ? NULL : ansi_highlight(),
TABLE_STRING, partname ?: "-", TABLE_SET_COLOR, partname ? NULL : ansi_highlight(),
TABLE_UINT64, p->offset,
TABLE_UINT64, p->current_size == UINT64_MAX ? 0 : p->current_size,
TABLE_UINT64, p->new_size,
TABLE_STRING, size_change, TABLE_SET_COLOR, !p->partitions_next && sum_size > 0 ? ansi_underline() : NULL,
TABLE_UINT64, p->current_padding == UINT64_MAX ? 0 : p->current_padding,
TABLE_UINT64, p->new_padding,
TABLE_STRING, padding_change, TABLE_SET_COLOR, !p->partitions_next && sum_padding > 0 ? ansi_underline() : NULL);
TABLE_STRING, padding_change, TABLE_SET_COLOR, !p->partitions_next && sum_padding > 0 ? ansi_underline() : NULL,
TABLE_STRING, activity ?: "unknown");
if (r < 0)
return table_log_add_error(r);
}
if (sum_padding > 0 || sum_size > 0) {
if (!arg_json && (sum_padding > 0 || sum_size > 0)) {
char s[FORMAT_BYTES_MAX];
const char *a, *b;
@ -1686,14 +1708,20 @@ static int context_dump_partitions(Context *context, const char *node) {
TABLE_EMPTY,
TABLE_EMPTY,
TABLE_EMPTY,
TABLE_EMPTY,
TABLE_STRING, a,
TABLE_EMPTY,
TABLE_STRING, b);
TABLE_EMPTY,
TABLE_STRING, b,
TABLE_EMPTY);
if (r < 0)
return table_log_add_error(r);
}
r = table_print(t, stdout);
if (arg_json)
r = table_print_json(t, stdout, arg_json_format_flags);
else
r = table_print(t, stdout);
if (r < 0)
return log_error_errno(r, "Failed to dump table: %m");
@ -2399,16 +2427,14 @@ static int context_write_partition_table(
assert(context);
if (arg_pretty > 0 ||
(arg_pretty < 0 && isatty(STDOUT_FILENO) > 0)) {
(arg_pretty < 0 && isatty(STDOUT_FILENO) > 0) || arg_json) {
if (context->n_partitions == 0)
puts("Empty partition table.");
else
(void) context_dump_partitions(context, node);
(void) context_dump_partitions(context, node);
putc('\n', stdout);
(void) context_dump_partition_bar(context, node);
if (!arg_json)
(void) context_dump_partition_bar(context, node);
putc('\n', stdout);
fflush(stdout);
}
@ -2799,6 +2825,8 @@ static int help(void) {
" --definitions=DIR Find partitions in specified directory\n"
" --seed=UUID 128bit seed UUID to derive all UUIDs from\n"
" --size=BYTES Grow loopback file to specified size\n"
" --json=(pretty|short|off)\n"
" Generate json output\n"
"\nSee the %s for details.\n"
, program_invocation_short_name
, ansi_highlight(), ansi_normal()
@ -2822,6 +2850,7 @@ static int parse_argv(int argc, char *argv[]) {
ARG_PRETTY,
ARG_DEFINITIONS,
ARG_SIZE,
ARG_JSON,
};
static const struct option options[] = {
@ -2837,6 +2866,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "pretty", required_argument, NULL, ARG_PRETTY },
{ "definitions", required_argument, NULL, ARG_DEFINITIONS },
{ "size", required_argument, NULL, ARG_SIZE },
{ "json", required_argument, NULL, ARG_JSON },
{}
};
@ -2960,6 +2990,26 @@ static int parse_argv(int argc, char *argv[]) {
arg_size = rounded;
break;
}
case ARG_JSON:
if (streq(optarg, "pretty")) {
arg_json = true;
arg_json_format_flags = JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR_AUTO;
} else if (streq(optarg, "short")) {
arg_json = true;
arg_json_format_flags = JSON_FORMAT_NEWLINE;
} else if (streq(optarg, "off")) {
arg_json = false;
arg_json_format_flags = 0;
} else if (streq(optarg, "help")) {
puts("pretty\n"
"short\n"
"off");
return 0;
} else
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown argument to --json=: %s", optarg);
break;
case '?':
return -EINVAL;