diff options
| -rw-r--r-- | builtin-log.c | 67 | ||||
| -rw-r--r-- | revision.c | 22 | ||||
| -rw-r--r-- | revision.h | 4 |
3 files changed, 93 insertions, 0 deletions
diff --git a/builtin-log.c b/builtin-log.c index 8b2bf632c5..4e9d0cb69c 100644 --- a/builtin-log.c +++ b/builtin-log.c @@ -77,11 +77,78 @@ static void cmd_log_init(int argc, const char **argv, const char *prefix, } } +static void log_show_early(struct rev_info *revs, struct commit_list *list) +{ + int i = revs->early_output; + + sort_in_topological_order(&list, revs->lifo); + while (list && i) { + struct commit *commit = list->item; + log_tree_commit(revs, commit); + list = list->next; + i--; + } +} + +static void early_output(int signal) +{ + show_early_output = log_show_early; +} + +static void setup_early_output(struct rev_info *rev) +{ + struct sigaction sa; + struct itimerval v; + + /* + * Set up the signal handler, minimally intrusively: + * we only set a single volatile integer word (not + * using sigatomic_t - trying to avoid unnecessary + * system dependencies and headers), and using + * SA_RESTART. + */ + memset(&sa, 0, sizeof(sa)); + sa.sa_handler = early_output; + sigemptyset(&sa.sa_mask); + sa.sa_flags = SA_RESTART; + sigaction(SIGALRM, &sa, NULL); + + /* + * If we can get the whole output in less than a + * tenth of a second, don't even bother doing the + * early-output thing.. + * + * This is a one-time-only trigger. + */ + memset(&v, 0, sizeof(v)); + v.it_value.tv_sec = 0; + v.it_value.tv_usec = 100000; + setitimer(ITIMER_REAL, &v, NULL); +} + +static void finish_early_output(struct rev_info *rev) +{ + signal(SIGALRM, SIG_IGN); + if (rev->shown_one) { + rev->shown_one = 0; + if (rev->commit_format != CMIT_FMT_ONELINE) + putchar(rev->diffopt.line_termination); + } + printf("Final output:\n"); +} + static int cmd_log_walk(struct rev_info *rev) { struct commit *commit; + if (rev->early_output) + setup_early_output(rev); + prepare_revision_walk(rev); + + if (rev->early_output) + finish_early_output(rev); + while ((commit = get_revision(rev)) != NULL) { log_tree_commit(rev, commit); if (!rev->reflog_info) { diff --git a/revision.c b/revision.c index e85b4af392..26610bb42d 100644 --- a/revision.c +++ b/revision.c @@ -10,6 +10,8 @@ #include "reflog-walk.h" #include "patch-ids.h" +volatile show_early_output_fn_t show_early_output; + static char *path_name(struct name_path *path, const char *name) { struct name_path *p; @@ -533,6 +535,7 @@ static int limit_list(struct rev_info *revs) struct commit_list *entry = list; struct commit *commit = list->item; struct object *obj = &commit->object; + show_early_output_fn_t show; list = list->next; free(entry); @@ -550,6 +553,13 @@ static int limit_list(struct rev_info *revs) if (revs->min_age != -1 && (commit->date > revs->min_age)) continue; p = &commit_list_insert(commit, p)->next; + + show = show_early_output; + if (!show) + continue; + + show(revs, newlist); + show_early_output = NULL; } if (revs->cherry_pick) cherry_pick_list(newlist, revs); @@ -991,6 +1001,18 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch revs->topo_order = 1; continue; } + if (!prefixcmp(arg, "--early-output")) { + int count = 100; + switch (arg[14]) { + case '=': + count = atoi(arg+15); + /* Fallthrough */ + case 0: + revs->topo_order = 1; + revs->early_output = count; + continue; + } + } if (!strcmp(arg, "--parents")) { revs->parents = 1; continue; diff --git a/revision.h b/revision.h index 1f645764a5..d8a5a5021f 100644 --- a/revision.h +++ b/revision.h @@ -30,6 +30,8 @@ struct rev_info { void *prune_data; prune_fn_t *prune_fn; + unsigned int early_output; + /* Traversal flags */ unsigned int dense:1, no_merges:1, @@ -105,6 +107,8 @@ struct rev_info { #define REV_TREE_DIFFERENT 2 /* revision.c */ +typedef void (*show_early_output_fn_t)(struct rev_info *, struct commit_list *); +volatile show_early_output_fn_t show_early_output; extern void init_revisions(struct rev_info *revs, const char *prefix); extern int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def); |