diff options
| -rw-r--r-- | rerere.c | 98 | ||||
| -rwxr-xr-x | t/t4200-rerere.sh | 2 |
2 files changed, 61 insertions, 39 deletions
@@ -74,7 +74,9 @@ static void assign_variant(struct rerere_id *id) variant = id->variant; if (variant < 0) { - variant = 0; /* for now */ + for (variant = 0; variant < rr_dir->status_nr; variant++) + if (!rr_dir->status[variant]) + break; } fit_variant(rr_dir, variant); id->variant = variant; @@ -177,15 +179,6 @@ static int has_rerere_resolution(const struct rerere_id *id) return ((id->collection->status[variant] & both) == both); } -static int has_rerere_preimage(const struct rerere_id *id) -{ - int variant = id->variant; - - if (variant < 0) - return 0; - return (id->collection->status[variant] & RR_HAS_PREIMAGE); -} - static struct rerere_id *new_rerere_id_hex(char *hex) { struct rerere_id *id = xmalloc(sizeof(*id)); @@ -818,6 +811,13 @@ static void update_paths(struct string_list *update) rollback_lock_file(&index_lock); } +static void remove_variant(struct rerere_id *id) +{ + unlink_or_warn(rerere_path(id, "postimage")); + unlink_or_warn(rerere_path(id, "preimage")); + id->collection->status[id->variant] = 0; +} + /* * The path indicated by rr_item may still have conflict for which we * have a recorded resolution, in which case replay it and optionally @@ -830,32 +830,46 @@ static void do_rerere_one_path(struct string_list_item *rr_item, { const char *path = rr_item->string; struct rerere_id *id = rr_item->util; + struct rerere_dir *rr_dir = id->collection; int variant; - if (id->variant < 0) - assign_variant(id); variant = id->variant; - if (!has_rerere_preimage(id)) { + /* Has the user resolved it already? */ + if (variant >= 0) { + if (!handle_file(path, NULL, NULL)) { + copy_file(rerere_path(id, "postimage"), path, 0666); + id->collection->status[variant] |= RR_HAS_POSTIMAGE; + fprintf(stderr, "Recorded resolution for '%s'.\n", path); + free_rerere_id(rr_item); + rr_item->util = NULL; + return; + } /* - * We are the first to encounter this conflict. Ask - * handle_file() to write the normalized contents to - * the "preimage" file. + * There may be other variants that can cleanly + * replay. Try them and update the variant number for + * this one. */ - handle_file(path, NULL, rerere_path(id, "preimage")); - if (id->collection->status[variant] & RR_HAS_POSTIMAGE) { - const char *path = rerere_path(id, "postimage"); - if (unlink(path)) - die_errno("cannot unlink stray '%s'", path); - id->collection->status[variant] &= ~RR_HAS_POSTIMAGE; - } - id->collection->status[variant] |= RR_HAS_PREIMAGE; - fprintf(stderr, "Recorded preimage for '%s'\n", path); - return; - } else if (has_rerere_resolution(id)) { - /* Is there a recorded resolution we could attempt to apply? */ - if (merge(id, path)) - return; /* failed to replay */ + } + + /* Does any existing resolution apply cleanly? */ + for (variant = 0; variant < rr_dir->status_nr; variant++) { + const int both = RR_HAS_PREIMAGE | RR_HAS_POSTIMAGE; + struct rerere_id vid = *id; + + if ((rr_dir->status[variant] & both) != both) + continue; + + vid.variant = variant; + if (merge(&vid, path)) + continue; /* failed to replay */ + + /* + * If there already is a different variant that applies + * cleanly, there is no point maintaining our own variant. + */ + if (0 <= id->variant && id->variant != variant) + remove_variant(id); if (rerere_autoupdate) string_list_insert(update, path); @@ -863,16 +877,24 @@ static void do_rerere_one_path(struct string_list_item *rr_item, fprintf(stderr, "Resolved '%s' using previous resolution.\n", path); - } else if (!handle_file(path, NULL, NULL)) { - /* The user has resolved it. */ - copy_file(rerere_path(id, "postimage"), path, 0666); - id->collection->status[variant] |= RR_HAS_POSTIMAGE; - fprintf(stderr, "Recorded resolution for '%s'.\n", path); - } else { + free_rerere_id(rr_item); + rr_item->util = NULL; return; } - free_rerere_id(rr_item); - rr_item->util = NULL; + + /* None of the existing one applies; we need a new variant */ + assign_variant(id); + + variant = id->variant; + handle_file(path, NULL, rerere_path(id, "preimage")); + if (id->collection->status[variant] & RR_HAS_POSTIMAGE) { + const char *path = rerere_path(id, "postimage"); + if (unlink(path)) + die_errno("cannot unlink stray '%s'", path); + id->collection->status[variant] &= ~RR_HAS_POSTIMAGE; + } + id->collection->status[variant] |= RR_HAS_PREIMAGE; + fprintf(stderr, "Recorded preimage for '%s'\n", path); } static int do_plain_rerere(struct string_list *rr, int fd) diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh index 6fcc6d4e7..b1bda2092 100755 --- a/t/t4200-rerere.sh +++ b/t/t4200-rerere.sh @@ -412,7 +412,7 @@ concat_insert () { cat early && printf "%s\n" "$@" && cat late "$last" } -test_expect_failure 'multiple identical conflicts' ' +test_expect_success 'multiple identical conflicts' ' git reset --hard && test_seq 1 6 >early && |