git@vger.kernel.org list mirror (unofficial, one of many)
 help / color / mirror / code / Atom feed
10434bce4b646ea75ff3e3ec1f75d479d7dc9536 blob 4739 bytes (raw)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
 
#include "builtin.h"
#include "config.h"
#include "parse-options.h"
#include "fsmonitor.h"
#include "fsmonitor-ipc.h"
#include "simple-ipc.h"
#include "khash.h"

static const char * const builtin_fsmonitor__daemon_usage[] = {
	N_("git fsmonitor--daemon --stop"),
	N_("git fsmonitor--daemon --is-running"),
	N_("git fsmonitor--daemon --query <token>"),
	N_("git fsmonitor--daemon --query-index"),
	N_("git fsmonitor--daemon --flush"),
	NULL
};

#ifdef HAVE_FSMONITOR_DAEMON_BACKEND
/*
 * Acting as a CLIENT.
 *
 * Send an IPC query to a `git-fsmonitor--daemon` SERVER process and
 * ask for the changes since the given token.  This will implicitly
 * start a daemon process if necessary.  The daemon process will
 * persist after we exit.
 *
 * This feature is primarily used by the test suite.
 */
static int do_as_client__query_token(const char *token)
{
	struct strbuf answer = STRBUF_INIT;
	int ret;

	ret = fsmonitor_ipc__send_query(token, &answer);
	if (ret < 0)
		die(_("could not query fsmonitor--daemon"));

	write_in_full(1, answer.buf, answer.len);
	strbuf_release(&answer);

	return 0;
}

/*
 * Acting as a CLIENT.
 *
 * Read the `.git/index` to get the last token written to the FSMonitor index
 * extension and use that to make a query.
 *
 * This feature is primarily used by the test suite.
 */
static int do_as_client__query_from_index(void)
{
	struct index_state *istate = the_repository->index;

	setup_git_directory();
	if (do_read_index(istate, the_repository->index_file, 0) < 0)
		die("unable to read index file");
	if (!istate->fsmonitor_last_update)
		die("index file does not have fsmonitor extension");

	return do_as_client__query_token(istate->fsmonitor_last_update);
}

/*
 * Acting as a CLIENT.
 *
 * Send a "quit" command to the `git-fsmonitor--daemon` (if running)
 * and wait for it to shutdown.
 */
static int do_as_client__send_stop(void)
{
	struct strbuf answer = STRBUF_INIT;
	int ret;

	ret = fsmonitor_ipc__send_command("quit", &answer);

	/* The quit command does not return any response data. */
	strbuf_release(&answer);

	if (ret)
		return ret;

	trace2_region_enter("fsm_client", "polling-for-daemon-exit", NULL);
	while (fsmonitor_ipc__get_state() == IPC_STATE__LISTENING)
		sleep_millisec(50);
	trace2_region_leave("fsm_client", "polling-for-daemon-exit", NULL);

	return 0;
}

/*
 * Acting as a CLIENT.
 *
 * Send a "flush" command to the `git-fsmonitor--daemon` (if running)
 * and tell it to flush its cache.
 *
 * This feature is primarily used by the test suite to simulate a loss of
 * sync with the filesystem where we miss kernel events.
 */
static int do_as_client__send_flush(void)
{
	struct strbuf answer = STRBUF_INIT;
	int ret;

	ret = fsmonitor_ipc__send_command("flush", &answer);
	if (ret)
		return ret;

	write_in_full(1, answer.buf, answer.len);
	strbuf_release(&answer);

	return 0;
}

static int is_ipc_daemon_listening(void)
{
	return fsmonitor_ipc__get_state() == IPC_STATE__LISTENING;
}

int cmd_fsmonitor__daemon(int argc, const char **argv, const char *prefix)
{
	enum daemon_mode {
		UNDEFINED_MODE,
		STOP,
		IS_RUNNING,
		QUERY,
		QUERY_INDEX,
		FLUSH,
	} mode = UNDEFINED_MODE;

	struct option options[] = {
		OPT_CMDMODE(0, "stop", &mode, N_("stop the running daemon"),
			    STOP),

		OPT_CMDMODE(0, "is-running", &mode,
			    N_("test whether the daemon is running"),
			    IS_RUNNING),

		OPT_CMDMODE(0, "query", &mode,
			    N_("query the daemon (starting if necessary)"),
			    QUERY),
		OPT_CMDMODE(0, "query-index", &mode,
			    N_("query the daemon (starting if necessary) using token from index"),
			    QUERY_INDEX),
		OPT_CMDMODE(0, "flush", &mode, N_("flush cached filesystem events"),
			    FLUSH),
		OPT_END()
	};

	if (argc == 2 && !strcmp(argv[1], "-h"))
		usage_with_options(builtin_fsmonitor__daemon_usage, options);

	git_config(git_default_config, NULL);

	argc = parse_options(argc, argv, prefix, options,
			     builtin_fsmonitor__daemon_usage, 0);

	switch (mode) {
	case STOP:
		return !!do_as_client__send_stop();

	case IS_RUNNING:
		return !is_ipc_daemon_listening();

	case QUERY:
		if (argc != 1)
			usage_with_options(builtin_fsmonitor__daemon_usage,
					   options);
		return !!do_as_client__query_token(argv[0]);

	case QUERY_INDEX:
		return !!do_as_client__query_from_index();

	case FLUSH:
		return !!do_as_client__send_flush();

	case UNDEFINED_MODE:
	default:
		die(_("Unhandled command mode %d"), mode);
	}
}

#else
int cmd_fsmonitor__daemon(int argc, const char **argv, const char *prefix)
{
	struct option options[] = {
		OPT_END()
	};

	if (argc == 2 && !strcmp(argv[1], "-h"))
		usage_with_options(builtin_fsmonitor__daemon_usage, options);

	die(_("fsmonitor--daemon not supported on this platform"));
}
#endif
debug log:

solving 10434bce4b64 ...
found 10434bce4b64 in https://public-inbox.org/git/77170e521f67ce92587d833334f6951a9f375d4d.1617291666.git.gitgitgadget@gmail.com/
found 6700bac92c7d in https://public-inbox.org/git/95d511d83b1211f24aeb17edbd4918750f406ece.1617291666.git.gitgitgadget@gmail.com/

applying [1/2] https://public-inbox.org/git/95d511d83b1211f24aeb17edbd4918750f406ece.1617291666.git.gitgitgadget@gmail.com/
diff --git a/builtin/fsmonitor--daemon.c b/builtin/fsmonitor--daemon.c
new file mode 100644
index 000000000000..6700bac92c7d


applying [2/2] https://public-inbox.org/git/77170e521f67ce92587d833334f6951a9f375d4d.1617291666.git.gitgitgadget@gmail.com/
diff --git a/builtin/fsmonitor--daemon.c b/builtin/fsmonitor--daemon.c
index 6700bac92c7d..10434bce4b64 100644

Checking patch builtin/fsmonitor--daemon.c...
Applied patch builtin/fsmonitor--daemon.c cleanly.
Checking patch builtin/fsmonitor--daemon.c...
Applied patch builtin/fsmonitor--daemon.c cleanly.

index at:
100644 10434bce4b646ea75ff3e3ec1f75d479d7dc9536	builtin/fsmonitor--daemon.c

Code repositories for project(s) associated with this inbox:

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).