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/*
* test-fsmonitor-client.c: client code to send commands/requests to
* a `git fsmonitor--daemon` daemon.
*/
#include "test-tool.h"
#include "cache.h"
#include "parse-options.h"
#include "fsmonitor-ipc.h"
#ifndef HAVE_FSMONITOR_DAEMON_BACKEND
int cmd__fsmonitor_client(int argc, const char **argv)
{
die("fsmonitor--daemon not available on this platform");
}
#else
/*
* Read the `.git/index` to get the last token written to the
* FSMonitor Index Extension.
*/
static const char *get_token_from_index(void)
{
struct index_state *istate = the_repository->index;
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 istate->fsmonitor_last_update;
}
/*
* Send an IPC query to a `git-fsmonitor--daemon` daemon and
* ask for the changes since the given token or from the last
* token in the index extension.
*
* This will implicitly start a daemon process if necessary. The
* daemon process will persist after we exit.
*/
static int do_send_query(const char *token)
{
struct strbuf answer = STRBUF_INIT;
int ret;
if (!token || !*token)
token = get_token_from_index();
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;
}
/*
* 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_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;
}
int cmd__fsmonitor_client(int argc, const char **argv)
{
const char *subcmd;
const char *token = NULL;
const char * const fsmonitor_client_usage[] = {
"test-tool fsmonitor-client query [<token>]",
"test-tool fsmonitor-client flush",
NULL,
};
struct option options[] = {
OPT_STRING(0, "token", &token, "token",
"command token to send to the server"),
OPT_END()
};
argc = parse_options(argc, argv, NULL, options, fsmonitor_client_usage, 0);
if (argc != 1)
usage_with_options(fsmonitor_client_usage, options);
subcmd = argv[0];
setup_git_directory();
if (!strcmp(subcmd, "query"))
return !!do_send_query(token);
if (!strcmp(subcmd, "flush"))
return !!do_send_flush();
die("Unhandled subcommand: '%s'", subcmd);
}
#endif
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