diff options
Diffstat (limited to 'rerere.c')
| -rw-r--r-- | rerere.c | 228 |
1 files changed, 193 insertions, 35 deletions
@@ -7,6 +7,11 @@ #include "ll-merge.h" #include "attr.h" +#define RESOLVED 0 +#define PUNTED 1 +#define THREE_STAGED 2 +void *RERERE_RESOLVED = &RERERE_RESOLVED; + /* if rerere_enabled == -1, fall back to detection of .git/rr-cache */ static int rerere_enabled = -1; @@ -42,11 +47,17 @@ static void read_rr(struct string_list *rr) name = xstrdup(buf); if (fgetc(in) != '\t') die("corrupt MERGE_RR"); - for (i = 0; i < sizeof(buf) && (buf[i] = fgetc(in)); i++) - ; /* do nothing */ + for (i = 0; i < sizeof(buf); i++) { + int c = fgetc(in); + if (c < 0) + die("corrupt MERGE_RR"); + buf[i] = c; + if (c == 0) + break; + } if (i == sizeof(buf)) die("filename too long"); - string_list_insert(buf, rr)->util = name; + string_list_insert(rr, buf)->util = name; } fclose(in); } @@ -153,7 +164,7 @@ static int handle_path(unsigned char *sha1, struct rerere_io *io, int marker_siz git_SHA_CTX ctx; int hunk_no = 0; enum { - RR_CONTEXT = 0, RR_SIDE_1, RR_SIDE_2, RR_ORIGINAL, + RR_CONTEXT = 0, RR_SIDE_1, RR_SIDE_2, RR_ORIGINAL } hunk = RR_CONTEXT; struct strbuf one = STRBUF_INIT, two = STRBUF_INIT; struct strbuf buf = STRBUF_INIT; @@ -319,9 +330,13 @@ static int handle_cache(const char *path, unsigned char *sha1, const char *outpu if (!mmfile[i].ptr && !mmfile[i].size) mmfile[i].ptr = xstrdup(""); } - ll_merge(&result, path, &mmfile[0], + /* + * NEEDSWORK: handle conflicts from merges with + * merge.renormalize set, too + */ + ll_merge(&result, path, &mmfile[0], NULL, &mmfile[1], "ours", - &mmfile[2], "theirs", 0); + &mmfile[2], "theirs", NULL); for (i = 0; i < 3; i++) free(mmfile[i].ptr); @@ -341,21 +356,74 @@ static int handle_cache(const char *path, unsigned char *sha1, const char *outpu return hunk_no; } -static int find_conflict(struct string_list *conflict) +static int check_one_conflict(int i, int *type) { - int i; - if (read_cache() < 0) - return error("Could not read index"); - for (i = 0; i+1 < active_nr; i++) { + struct cache_entry *e = active_cache[i]; + + if (!ce_stage(e)) { + *type = RESOLVED; + return i + 1; + } + + *type = PUNTED; + if (ce_stage(e) == 1) { + if (active_nr <= ++i) + return i + 1; + } + + /* Only handle regular files with both stages #2 and #3 */ + if (i + 1 < active_nr) { struct cache_entry *e2 = active_cache[i]; - struct cache_entry *e3 = active_cache[i+1]; + struct cache_entry *e3 = active_cache[i + 1]; if (ce_stage(e2) == 2 && ce_stage(e3) == 3 && - ce_same_name(e2, e3) && + ce_same_name(e, e3) && S_ISREG(e2->ce_mode) && - S_ISREG(e3->ce_mode)) { - string_list_insert((const char *)e2->name, conflict); - i++; /* skip over both #2 and #3 */ + S_ISREG(e3->ce_mode)) + *type = THREE_STAGED; + } + + /* Skip the entries with the same name */ + while (i < active_nr && ce_same_name(e, active_cache[i])) + i++; + return i; +} + +static int find_conflict(struct string_list *conflict) +{ + int i; + if (read_cache() < 0) + return error("Could not read index"); + + for (i = 0; i < active_nr;) { + int conflict_type; + struct cache_entry *e = active_cache[i]; + i = check_one_conflict(i, &conflict_type); + if (conflict_type == THREE_STAGED) + string_list_insert(conflict, (const char *)e->name); + } + return 0; +} + +int rerere_remaining(struct string_list *merge_rr) +{ + int i; + if (read_cache() < 0) + return error("Could not read index"); + + for (i = 0; i < active_nr;) { + int conflict_type; + struct cache_entry *e = active_cache[i]; + i = check_one_conflict(i, &conflict_type); + if (conflict_type == PUNTED) + string_list_insert(merge_rr, (const char *)e->name); + else if (conflict_type == RESOLVED) { + struct string_list_item *it; + it = string_list_lookup(merge_rr, (const char *)e->name); + if (it != NULL) { + free(it->util); + it->util = RERERE_RESOLVED; + } } } return 0; @@ -376,9 +444,15 @@ static int merge(const char *name, const char *path) ret = 1; goto out; } - ret = ll_merge(&result, path, &base, &cur, "", &other, "", 0); + ret = ll_merge(&result, path, &base, NULL, &cur, "", &other, "", NULL); if (!ret) { - FILE *f = fopen(path, "w"); + FILE *f; + + if (utime(rerere_path(name, "postimage"), NULL) < 0) + warning("failed utime() on %s: %s", + rerere_path(name, "postimage"), + strerror(errno)); + f = fopen(path, "w"); if (!f) return error("Could not open %s: %s", path, strerror(errno)); @@ -426,8 +500,8 @@ static int update_paths(struct string_list *update) static int do_plain_rerere(struct string_list *rr, int fd) { - struct string_list conflict = { NULL, 0, 0, 1 }; - struct string_list update = { NULL, 0, 0, 1 }; + struct string_list conflict = STRING_LIST_INIT_DUP; + struct string_list update = STRING_LIST_INIT_DUP; int i; find_conflict(&conflict); @@ -449,8 +523,8 @@ static int do_plain_rerere(struct string_list *rr, int fd) if (ret < 1) continue; hex = xstrdup(sha1_to_hex(sha1)); - string_list_insert(path, rr)->util = hex; - if (mkdir(git_path("rr-cache/%s", hex), 0755)) + string_list_insert(rr, path)->util = hex; + if (mkdir_in_gitdir(git_path("rr-cache/%s", hex))) continue; handle_file(path, NULL, rerere_path(hex, "preimage")); fprintf(stderr, "Recorded preimage for '%s'\n", path); @@ -470,13 +544,13 @@ static int do_plain_rerere(struct string_list *rr, int fd) if (has_rerere_resolution(name)) { if (!merge(name, path)) { - if (rerere_autoupdate) - string_list_insert(path, &update); - fprintf(stderr, - "%s '%s' using previous resolution.\n", - rerere_autoupdate - ? "Staged" : "Resolved", - path); + const char *msg; + if (rerere_autoupdate) { + string_list_insert(&update, path); + msg = "Staged '%s' using previous resolution.\n"; + } else + msg = "Resolved '%s' using previous resolution.\n"; + fprintf(stderr, msg, path); goto mark_resolved; } } @@ -522,8 +596,7 @@ static int is_rerere_enabled(void) if (rerere_enabled < 0) return rr_cache_exists; - if (!rr_cache_exists && - (mkdir(rr_cache, 0777) || adjust_shared_perm(rr_cache))) + if (!rr_cache_exists && mkdir_in_gitdir(rr_cache)) die("Could not create directory %s", rr_cache); return 1; } @@ -547,7 +620,7 @@ int setup_rerere(struct string_list *merge_rr, int flags) int rerere(int flags) { - struct string_list merge_rr = { NULL, 0, 0, 1 }; + struct string_list merge_rr = STRING_LIST_INIT_DUP; int fd; fd = setup_rerere(&merge_rr, flags); @@ -577,7 +650,7 @@ static int rerere_forget_one_path(const char *path, struct string_list *rr) fprintf(stderr, "Updated preimage for '%s'\n", path); - string_list_insert(path, rr)->util = hex; + string_list_insert(rr, path)->util = hex; fprintf(stderr, "Forgot resolution for %s\n", path); return 0; } @@ -585,8 +658,8 @@ static int rerere_forget_one_path(const char *path, struct string_list *rr) int rerere_forget(const char **pathspec) { int i, fd; - struct string_list conflict = { NULL, 0, 0, 1 }; - struct string_list merge_rr = { NULL, 0, 0, 1 }; + struct string_list conflict = STRING_LIST_INIT_DUP; + struct string_list merge_rr = STRING_LIST_INIT_DUP; if (read_cache() < 0) return error("Could not read index"); @@ -604,3 +677,88 @@ int rerere_forget(const char **pathspec) } return write_rr(&merge_rr, fd); } + +static time_t rerere_created_at(const char *name) +{ + struct stat st; + return stat(rerere_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime; +} + +static time_t rerere_last_used_at(const char *name) +{ + struct stat st; + return stat(rerere_path(name, "postimage"), &st) ? (time_t) 0 : st.st_mtime; +} + +static void unlink_rr_item(const char *name) +{ + unlink(rerere_path(name, "thisimage")); + unlink(rerere_path(name, "preimage")); + unlink(rerere_path(name, "postimage")); + rmdir(git_path("rr-cache/%s", name)); +} + +struct rerere_gc_config_cb { + int cutoff_noresolve; + int cutoff_resolve; +}; + +static int git_rerere_gc_config(const char *var, const char *value, void *cb) +{ + struct rerere_gc_config_cb *cf = cb; + + if (!strcmp(var, "gc.rerereresolved")) + cf->cutoff_resolve = git_config_int(var, value); + else if (!strcmp(var, "gc.rerereunresolved")) + cf->cutoff_noresolve = git_config_int(var, value); + else + return git_default_config(var, value, cb); + return 0; +} + +void rerere_gc(struct string_list *rr) +{ + struct string_list to_remove = STRING_LIST_INIT_DUP; + DIR *dir; + struct dirent *e; + int i, cutoff; + time_t now = time(NULL), then; + struct rerere_gc_config_cb cf = { 15, 60 }; + + git_config(git_rerere_gc_config, &cf); + dir = opendir(git_path("rr-cache")); + if (!dir) + die_errno("unable to open rr-cache directory"); + while ((e = readdir(dir))) { + if (is_dot_or_dotdot(e->d_name)) + continue; + + then = rerere_last_used_at(e->d_name); + if (then) { + cutoff = cf.cutoff_resolve; + } else { + then = rerere_created_at(e->d_name); + if (!then) + continue; + cutoff = cf.cutoff_noresolve; + } + if (then < now - cutoff * 86400) + string_list_append(&to_remove, e->d_name); + } + closedir(dir); + for (i = 0; i < to_remove.nr; i++) + unlink_rr_item(to_remove.items[i].string); + string_list_clear(&to_remove, 0); +} + +void rerere_clear(struct string_list *merge_rr) +{ + int i; + + for (i = 0; i < merge_rr->nr; i++) { + const char *name = (const char *)merge_rr->items[i].util; + if (!has_rerere_resolution(name)) + unlink_rr_item(name); + } + unlink_or_warn(git_path("MERGE_RR")); +} |