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Merge branch 'jn/fast-import-ondemand-checkpoint'
* jn/fast-import-ondemand-checkpoint: fast-import: treat SIGUSR1 as a request to access objects early
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commit
f73c3e9704
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@ -1233,6 +1233,13 @@ and lazy loading of subtrees, allows fast-import to efficiently import
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projects with 2,000+ branches and 45,114+ files in a very limited
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memory footprint (less than 2.7 MiB per active branch).
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Signals
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-------
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Sending *SIGUSR1* to the 'git fast-import' process ends the current
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packfile early, simulating a `checkpoint` command. The impatient
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operator can use this facility to peek at the objects and refs from an
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import in progress, at the cost of some added running time and worse
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compression.
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Author
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------
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@ -362,6 +362,9 @@ static uintmax_t next_mark;
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static struct strbuf new_data = STRBUF_INIT;
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static int seen_data_command;
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/* Signal handling */
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static volatile sig_atomic_t checkpoint_requested;
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static void parse_argv(void);
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static void write_branch_report(FILE *rpt, struct branch *b)
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@ -501,6 +504,32 @@ static NORETURN void die_nicely(const char *err, va_list params)
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exit(128);
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}
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#ifndef SIGUSR1 /* Windows, for example */
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static void set_checkpoint_signal(void)
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{
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}
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#else
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static void checkpoint_signal(int signo)
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{
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checkpoint_requested = 1;
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}
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static void set_checkpoint_signal(void)
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{
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struct sigaction sa;
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memset(&sa, 0, sizeof(sa));
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sa.sa_handler = checkpoint_signal;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_RESTART;
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sigaction(SIGUSR1, &sa, NULL);
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}
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#endif
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static void alloc_objects(unsigned int cnt)
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{
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struct object_entry_pool *b;
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@ -2715,14 +2744,20 @@ static void parse_reset_branch(void)
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unread_command_buf = 1;
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}
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static void parse_checkpoint(void)
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static void checkpoint(void)
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{
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checkpoint_requested = 0;
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if (object_count) {
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cycle_packfile();
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dump_branches();
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dump_tags();
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dump_marks();
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}
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}
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static void parse_checkpoint(void)
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{
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checkpoint_requested = 1;
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skip_optional_lf();
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}
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@ -2979,6 +3014,7 @@ int main(int argc, const char **argv)
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prepare_packed_git();
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start_packfile();
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set_die_routine(die_nicely);
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set_checkpoint_signal();
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while (read_next_command() != EOF) {
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if (!strcmp("blob", command_buf.buf))
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parse_new_blob();
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@ -3000,6 +3036,9 @@ int main(int argc, const char **argv)
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/* ignore non-git options*/;
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else
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die("Unsupported command: %s", command_buf.buf);
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if (checkpoint_requested)
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checkpoint();
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}
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/* argv hasn't been parsed yet, do so */
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