diff options
| -rw-r--r-- | Documentation/config.txt | 5 | ||||
| -rw-r--r-- | builtin-rerere.c | 118 | ||||
| -rwxr-xr-x | t/t4200-rerere.sh | 16 |
3 files changed, 95 insertions, 44 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt index a403d46c1b..838794dca7 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -658,6 +658,11 @@ gc.rerereunresolved:: kept for this many days when 'git-rerere gc' is run. The default is 15 days. See linkgit:git-rerere[1]. +rerere.autoupdate:: + When set to true, `git-rerere` updates the index with the + resulting contents after it cleanly resolves conflicts using + previously recorded resolution. Defaults to false. + rerere.enabled:: Activate recording of resolved conflicts, so that identical conflict hunks can be resolved automatically, should they diff --git a/builtin-rerere.c b/builtin-rerere.c index 85222d9bc5..839b26e8e0 100644 --- a/builtin-rerere.c +++ b/builtin-rerere.c @@ -16,6 +16,9 @@ static int cutoff_resolve = 60; /* if rerere_enabled == -1, fall back to detection of .git/rr-cache */ static int rerere_enabled = -1; +/* automatically update cleanly resolved paths to the index */ +static int rerere_autoupdate; + static char *merge_rr_path; static const char *rr_path(const char *name, const char *file) @@ -23,6 +26,18 @@ static const char *rr_path(const char *name, const char *file) return git_path("rr-cache/%s/%s", name, file); } +static time_t rerere_created_at(const char *name) +{ + struct stat st; + return stat(rr_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime; +} + +static int has_resolution(const char *name) +{ + struct stat st; + return !stat(rr_path(name, "postimage"), &st); +} + static void read_rr(struct path_list *rr) { unsigned char sha1[20]; @@ -54,8 +69,12 @@ static int write_rr(struct path_list *rr, int out_fd) { int i; for (i = 0; i < rr->nr; i++) { - const char *path = rr->items[i].path; - int length = strlen(path) + 1; + const char *path; + int length; + if (!rr->items[i].util) + continue; + path = rr->items[i].path; + length = strlen(path) + 1; if (write_in_full(out_fd, rr->items[i].util, 40) != 40 || write_in_full(out_fd, "\t", 1) != 1 || write_in_full(out_fd, path, length) != length) @@ -98,13 +117,10 @@ static int handle_file(const char *path, else if (!prefixcmp(buf, "=======")) hunk = 2; else if (!prefixcmp(buf, ">>>>>>> ")) { - int cmp = strbuf_cmp(&one, &two); - + if (strbuf_cmp(&one, &two) > 0) + strbuf_swap(&one, &two); hunk_no++; hunk = 0; - if (cmp > 0) { - strbuf_swap(&one, &two); - } if (out) { fputs("<<<<<<<\n", out); fwrite(one.buf, one.len, 1, out); @@ -135,6 +151,11 @@ static int handle_file(const char *path, fclose(out); if (sha1) SHA1_Final(sha1, &ctx); + if (hunk) { + if (output) + unlink(output); + return error("Could not parse conflict hunks in %s", path); + } return hunk_no; } @@ -201,33 +222,24 @@ static void unlink_rr_item(const char *name) static void garbage_collect(struct path_list *rr) { struct path_list to_remove = { NULL, 0, 0, 1 }; - char buf[1024]; DIR *dir; struct dirent *e; - int len, i, cutoff; + int i, cutoff; time_t now = time(NULL), then; - strlcpy(buf, git_path("rr-cache"), sizeof(buf)); - len = strlen(buf); - dir = opendir(buf); - strcpy(buf + len++, "/"); + dir = opendir(git_path("rr-cache")); while ((e = readdir(dir))) { const char *name = e->d_name; - struct stat st; - if (name[0] == '.' && (name[1] == '\0' || - (name[1] == '.' && name[2] == '\0'))) + if (name[0] == '.' && + (name[1] == '\0' || (name[1] == '.' && name[2] == '\0'))) continue; - i = snprintf(buf + len, sizeof(buf) - len, "%s", name); - strlcpy(buf + len + i, "/preimage", sizeof(buf) - len - i); - if (stat(buf, &st)) + then = rerere_created_at(name); + if (!then) continue; - then = st.st_mtime; - strlcpy(buf + len + i, "/postimage", sizeof(buf) - len - i); - cutoff = stat(buf, &st) ? cutoff_noresolve : cutoff_resolve; - if (then < now - cutoff * 86400) { - buf[len + i] = '\0'; - path_list_insert(xstrdup(name), &to_remove); - } + cutoff = (has_resolution(name) + ? cutoff_resolve : cutoff_noresolve); + if (then < now - cutoff * 86400) + path_list_append(name, &to_remove); } for (i = 0; i < to_remove.nr; i++) unlink_rr_item(to_remove.items[i].path); @@ -267,9 +279,36 @@ static int diff_two(const char *file1, const char *label1, return 0; } +static struct lock_file index_lock; + +static int update_paths(struct path_list *update) +{ + int i; + int fd = hold_locked_index(&index_lock, 0); + int status = 0; + + if (fd < 0) + return -1; + + for (i = 0; i < update->nr; i++) { + struct path_list_item *item = &update->items[i]; + if (add_file_to_cache(item->path, ADD_CACHE_IGNORE_ERRORS)) + status = -1; + } + + if (!status && active_cache_changed) { + if (write_cache(fd, active_cache, active_nr) || + commit_locked_index(&index_lock)) + die("Unable to write new index file"); + } else if (fd >= 0) + rollback_lock_file(&index_lock); + return status; +} + static int do_plain_rerere(struct path_list *rr, int fd) { struct path_list conflict = { NULL, 0, 0, 1 }; + struct path_list update = { NULL, 0, 0, 1 }; int i; find_conflict(&conflict); @@ -306,17 +345,17 @@ static int do_plain_rerere(struct path_list *rr, int fd) */ for (i = 0; i < rr->nr; i++) { - struct stat st; int ret; const char *path = rr->items[i].path; const char *name = (const char *)rr->items[i].util; - if (!stat(rr_path(name, "preimage"), &st) && - !stat(rr_path(name, "postimage"), &st)) { + if (has_resolution(name)) { if (!merge(name, path)) { fprintf(stderr, "Resolved '%s' using " "previous resolution.\n", path); - goto tail_optimization; + if (rerere_autoupdate) + path_list_insert(path, &update); + goto mark_resolved; } } @@ -327,15 +366,13 @@ static int do_plain_rerere(struct path_list *rr, int fd) fprintf(stderr, "Recorded resolution for '%s'.\n", path); copy_file(rr_path(name, "postimage"), path, 0666); -tail_optimization: - if (i < rr->nr - 1) - memmove(rr->items + i, - rr->items + i + 1, - sizeof(rr->items[0]) * (rr->nr - i - 1)); - rr->nr--; - i--; + mark_resolved: + rr->items[i].util = NULL; } + if (update.nr) + update_paths(&update); + return write_rr(rr, fd); } @@ -347,6 +384,8 @@ static int git_rerere_config(const char *var, const char *value, void *cb) cutoff_noresolve = git_config_int(var, value); else if (!strcmp(var, "rerere.enabled")) rerere_enabled = git_config_bool(var, value); + else if (!strcmp(var, "rerere.autoupdate")) + rerere_autoupdate = git_config_bool(var, value); else return git_default_config(var, value, cb); return 0; @@ -410,11 +449,8 @@ int cmd_rerere(int argc, const char **argv, const char *prefix) return do_plain_rerere(&merge_rr, fd); else if (!strcmp(argv[1], "clear")) { for (i = 0; i < merge_rr.nr; i++) { - struct stat st; const char *name = (const char *)merge_rr.items[i].util; - if (!stat(git_path("rr-cache/%s", name), &st) && - S_ISDIR(st.st_mode) && - stat(rr_path(name, "postimage"), &st)) + if (!has_resolution(name)) unlink_rr_item(name); } unlink(merge_rr_path); diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh index 85d7e3edcd..a64727d5ad 100755 --- a/t/t4200-rerere.sh +++ b/t/t4200-rerere.sh @@ -193,9 +193,19 @@ test_expect_success 'resolution was recorded properly' ' echo Bello > file3 && git add file3 && git commit -m version2 && - ! git merge fifth && - git diff-files -q && - test Cello = "$(cat file3)" + git tag version2 && + test_must_fail git merge fifth && + test Cello = "$(cat file3)" && + test 0 != $(git ls-files -u | wc -l) +' + +test_expect_success 'rerere.autoupdate' ' + git config rerere.autoupdate true + git reset --hard && + git checkout version2 && + test_must_fail git merge fifth && + test 0 = $(git ls-files -u | wc -l) + ' test_done |