X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=rev-list.c;h=67d2a483fce79e23433ef21f209e55f7ff7a171d;hb=c401cb48e77459a4ccad76888ad31bef252facc5;hp=3a32e405a38faebe0d4b7ec3b743fe3e15cfd3cf;hpb=4ae22d96fe9248dac4f26b1fc91154ba5e879799;p=git.git diff --git a/rev-list.c b/rev-list.c index 3a32e405..67d2a483 100644 --- a/rev-list.c +++ b/rev-list.c @@ -5,33 +5,48 @@ #include "tree.h" #include "blob.h" #include "epoch.h" +#include "diff.h" #define SEEN (1u << 0) #define INTERESTING (1u << 1) #define COUNTED (1u << 2) #define SHOWN (1u << 3) +#define TREECHANGE (1u << 4) +#define TMP_MARK (1u << 5) /* for isolated cases; clean after use */ static const char rev_list_usage[] = - "git-rev-list [OPTION] commit-id \n" - " --max-count=nr\n" - " --max-age=epoch\n" - " --min-age=epoch\n" - " --parents\n" - " --bisect\n" - " --objects\n" - " --unpacked\n" - " --header\n" - " --pretty\n" - " --no-merges\n" - " --merge-order [ --show-breaks ]\n" - " --topo-order"; +"git-rev-list [OPTION] ... [ -- paths... ]\n" +" limiting output:\n" +" --max-count=nr\n" +" --max-age=epoch\n" +" --min-age=epoch\n" +" --sparse\n" +" --no-merges\n" +" --remove-empty\n" +" --all\n" +" ordering output:\n" +" --merge-order [ --show-breaks ]\n" +" --topo-order\n" +" --date-order\n" +" formatting output:\n" +" --parents\n" +" --objects | --objects-edge\n" +" --unpacked\n" +" --header | --pretty\n" +" --abbrev=nr | --no-abbrev\n" +" special purpose:\n" +" --bisect" +; +static int dense = 1; static int unpacked = 0; static int bisect_list = 0; static int tag_objects = 0; static int tree_objects = 0; static int blob_objects = 0; +static int edge_hint = 0; static int verbose_header = 0; +static int abbrev = DEFAULT_ABBREV; static int show_parents = 0; static int hdr_termination = 0; static const char *commit_prefix = ""; @@ -43,7 +58,40 @@ static int merge_order = 0; static int show_breaks = 0; static int stop_traversal = 0; static int topo_order = 0; +static int lifo = 1; static int no_merges = 0; +static const char **paths = NULL; +static int remove_empty_trees = 0; + +struct name_path { + struct name_path *up; + int elem_len; + const char *elem; +}; + +static char *path_name(struct name_path *path, const char *name) +{ + struct name_path *p; + char *n, *m; + int nlen = strlen(name); + int len = nlen + 1; + + for (p = path; p; p = p->up) { + if (p->elem_len) + len += p->elem_len + 1; + } + n = xmalloc(len); + m = n + len - (nlen + 1); + strcpy(m, name); + for (p = path; p; p = p->up) { + if (p->elem_len) { + m -= p->elem_len + 1; + memcpy(m, p->elem, p->elem_len); + m[p->elem_len] = '/'; + } + } + return n; +} static void show_commit(struct commit *commit) { @@ -60,9 +108,21 @@ static void show_commit(struct commit *commit) if (show_parents) { struct commit_list *parents = commit->parents; while (parents) { - printf(" %s", sha1_to_hex(parents->item->object.sha1)); + struct object *o = &(parents->item->object); parents = parents->next; + if (o->flags & TMP_MARK) + continue; + printf(" %s", sha1_to_hex(o->sha1)); + o->flags |= TMP_MARK; } + /* TMP_MARK is a general purpose flag that can + * be used locally, but the user should clean + * things up after it is done with them. + */ + for (parents = commit->parents; + parents; + parents = parents->next) + parents->item->object.flags &= ~TMP_MARK; } if (commit_format == CMIT_FMT_ONELINE) putchar(' '); @@ -71,12 +131,37 @@ static void show_commit(struct commit *commit) if (verbose_header) { static char pretty_header[16384]; - pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header)); + pretty_print_commit(commit_format, commit, ~0, pretty_header, sizeof(pretty_header), abbrev); printf("%s%c", pretty_header, hdr_termination); } fflush(stdout); } +static int rewrite_one(struct commit **pp) +{ + for (;;) { + struct commit *p = *pp; + if (p->object.flags & (TREECHANGE | UNINTERESTING)) + return 0; + if (!p->parents) + return -1; + *pp = p->parents->item; + } +} + +static void rewrite_parents(struct commit *commit) +{ + struct commit_list **pp = &commit->parents; + while (*pp) { + struct commit_list *parent = *pp; + if (rewrite_one(&parent->item) < 0) { + *pp = parent->next; + continue; + } + pp = &parent->next; + } +} + static int filter_commit(struct commit * commit) { if (stop_traversal && (commit->object.flags & BOUNDARY)) @@ -89,10 +174,13 @@ static int filter_commit(struct commit * commit) stop_traversal=1; return CONTINUE; } - if (max_count != -1 && !max_count--) - return STOP; if (no_merges && (commit->parents && commit->parents->next)) return CONTINUE; + if (paths && dense) { + if (!(commit->object.flags & TREECHANGE)) + return CONTINUE; + rewrite_parents(commit); + } return DO; } @@ -108,22 +196,31 @@ static int process_commit(struct commit * commit) return CONTINUE; } + if (max_count != -1 && !max_count--) + return STOP; + show_commit(commit); return CONTINUE; } -static struct object_list **add_object(struct object *obj, struct object_list **p, const char *name) +static struct object_list **add_object(struct object *obj, + struct object_list **p, + struct name_path *path, + const char *name) { struct object_list *entry = xmalloc(sizeof(*entry)); entry->item = obj; entry->next = *p; - entry->name = name; + entry->name = path_name(path, name); *p = entry; return &entry->next; } -static struct object_list **process_blob(struct blob *blob, struct object_list **p, const char *name) +static struct object_list **process_blob(struct blob *blob, + struct object_list **p, + struct name_path *path, + const char *name) { struct object *obj = &blob->object; @@ -132,13 +229,17 @@ static struct object_list **process_blob(struct blob *blob, struct object_list * if (obj->flags & (UNINTERESTING | SEEN)) return p; obj->flags |= SEEN; - return add_object(obj, p, name); + return add_object(obj, p, path, name); } -static struct object_list **process_tree(struct tree *tree, struct object_list **p, const char *name) +static struct object_list **process_tree(struct tree *tree, + struct object_list **p, + struct name_path *path, + const char *name) { struct object *obj = &tree->object; struct tree_entry_list *entry; + struct name_path me; if (!tree_objects) return p; @@ -147,15 +248,18 @@ static struct object_list **process_tree(struct tree *tree, struct object_list * if (parse_tree(tree) < 0) die("bad tree object %s", sha1_to_hex(obj->sha1)); obj->flags |= SEEN; - p = add_object(obj, p, name); + p = add_object(obj, p, path, name); + me.up = path; + me.elem = name; + me.elem_len = strlen(name); entry = tree->entries; tree->entries = NULL; while (entry) { struct tree_entry_list *next = entry->next; if (entry->directory) - p = process_tree(entry->item.tree, p, entry->name); + p = process_tree(entry->item.tree, p, &me, entry->name); else - p = process_blob(entry->item.blob, p, entry->name); + p = process_blob(entry->item.blob, p, &me, entry->name); free(entry); entry = next; } @@ -170,7 +274,7 @@ static void show_commit_list(struct commit_list *list) while (list) { struct commit *commit = pop_most_recent_commit(&list, SEEN); - p = process_tree(commit->tree, p, ""); + p = process_tree(commit->tree, p, NULL, ""); if (process_commit(commit) == STOP) break; } @@ -181,22 +285,22 @@ static void show_commit_list(struct commit_list *list) continue; if (obj->type == tag_type) { obj->flags |= SEEN; - p = add_object(obj, p, name); + p = add_object(obj, p, NULL, name); continue; } if (obj->type == tree_type) { - p = process_tree((struct tree *)obj, p, name); + p = process_tree((struct tree *)obj, p, NULL, name); continue; } if (obj->type == blob_type) { - p = process_blob((struct blob *)obj, p, name); + p = process_blob((struct blob *)obj, p, NULL, name); continue; } die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name); } while (objects) { - /* An object with name "foo\n0000000000000000000000000000000000000000" - * can be used confuse downstream git-pack-objects very badly. + /* An object with name "foo\n0000000..." can be used to + * confuse downstream git-pack-objects very badly. */ const char *ep = strchr(objects->name, '\n'); if (ep) { @@ -309,7 +413,8 @@ static int count_distance(struct commit_list *entry) if (commit->object.flags & (UNINTERESTING | COUNTED)) break; - nr++; + if (!paths || (commit->object.flags & TREECHANGE)) + nr++; commit->object.flags |= COUNTED; p = commit->parents; entry = p; @@ -321,6 +426,7 @@ static int count_distance(struct commit_list *entry) } } } + return nr; } @@ -341,15 +447,20 @@ static struct commit_list *find_bisection(struct commit_list *list) nr = 0; p = list; while (p) { - nr++; + if (!paths || (p->item->object.flags & TREECHANGE)) + nr++; p = p->next; } closest = 0; best = list; - p = list; - while (p) { - int distance = count_distance(p); + for (p = list; p; p = p->next) { + int distance; + + if (paths && !(p->item->object.flags & TREECHANGE)) + continue; + + distance = count_distance(p); clear_distance(list); if (nr - distance < distance) distance = nr - distance; @@ -357,23 +468,216 @@ static struct commit_list *find_bisection(struct commit_list *list) best = p; closest = distance; } - p = p->next; } if (best) best->next = NULL; return best; } +static void mark_edge_parents_uninteresting(struct commit *commit) +{ + struct commit_list *parents; + + for (parents = commit->parents; parents; parents = parents->next) { + struct commit *parent = parents->item; + if (!(parent->object.flags & UNINTERESTING)) + continue; + mark_tree_uninteresting(parent->tree); + if (edge_hint && !(parent->object.flags & SHOWN)) { + parent->object.flags |= SHOWN; + printf("-%s\n", sha1_to_hex(parent->object.sha1)); + } + } +} + static void mark_edges_uninteresting(struct commit_list *list) { for ( ; list; list = list->next) { - struct commit_list *parents = list->item->parents; + struct commit *commit = list->item; + + if (commit->object.flags & UNINTERESTING) { + mark_tree_uninteresting(commit->tree); + continue; + } + mark_edge_parents_uninteresting(commit); + } +} + +#define TREE_SAME 0 +#define TREE_NEW 1 +#define TREE_DIFFERENT 2 +static int tree_difference = TREE_SAME; + +static void file_add_remove(struct diff_options *options, + int addremove, unsigned mode, + const unsigned char *sha1, + const char *base, const char *path) +{ + int diff = TREE_DIFFERENT; + + /* + * Is it an add of a new file? It means that + * the old tree didn't have it at all, so we + * will turn "TREE_SAME" -> "TREE_NEW", but + * leave any "TREE_DIFFERENT" alone (and if + * it already was "TREE_NEW", we'll keep it + * "TREE_NEW" of course). + */ + if (addremove == '+') { + diff = tree_difference; + if (diff != TREE_SAME) + return; + diff = TREE_NEW; + } + tree_difference = diff; +} + +static void file_change(struct diff_options *options, + unsigned old_mode, unsigned new_mode, + const unsigned char *old_sha1, + const unsigned char *new_sha1, + const char *base, const char *path) +{ + tree_difference = TREE_DIFFERENT; +} + +static struct diff_options diff_opt = { + .recursive = 1, + .add_remove = file_add_remove, + .change = file_change, +}; + +static int compare_tree(struct tree *t1, struct tree *t2) +{ + if (!t1) + return TREE_NEW; + if (!t2) + return TREE_DIFFERENT; + tree_difference = TREE_SAME; + if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "", &diff_opt) < 0) + return TREE_DIFFERENT; + return tree_difference; +} + +static int same_tree_as_empty(struct tree *t1) +{ + int retval; + void *tree; + struct tree_desc empty, real; + + if (!t1) + return 0; + + tree = read_object_with_reference(t1->object.sha1, "tree", &real.size, NULL); + if (!tree) + return 0; + real.buf = tree; + + empty.buf = ""; + empty.size = 0; + + tree_difference = 0; + retval = diff_tree(&empty, &real, "", &diff_opt); + free(tree); + + return retval >= 0 && !tree_difference; +} - for ( ; parents; parents = parents->next) { - struct commit *commit = parents->item; - if (commit->object.flags & UNINTERESTING) - mark_tree_uninteresting(commit->tree); +static void try_to_simplify_commit(struct commit *commit) +{ + struct commit_list **pp, *parent; + + if (!commit->tree) + return; + + if (!commit->parents) { + if (!same_tree_as_empty(commit->tree)) + commit->object.flags |= TREECHANGE; + return; + } + + pp = &commit->parents; + while ((parent = *pp) != NULL) { + struct commit *p = parent->item; + + if (p->object.flags & UNINTERESTING) { + pp = &parent->next; + continue; + } + + parse_commit(p); + switch (compare_tree(p->tree, commit->tree)) { + case TREE_SAME: + parent->next = NULL; + commit->parents = parent; + return; + + case TREE_NEW: + if (remove_empty_trees && same_tree_as_empty(p->tree)) { + *pp = parent->next; + continue; + } + /* fallthrough */ + case TREE_DIFFERENT: + pp = &parent->next; + continue; + } + die("bad tree compare for commit %s", sha1_to_hex(commit->object.sha1)); + } + commit->object.flags |= TREECHANGE; +} + +static void add_parents_to_list(struct commit *commit, struct commit_list **list) +{ + struct commit_list *parent = commit->parents; + + /* + * If the commit is uninteresting, don't try to + * prune parents - we want the maximal uninteresting + * set. + * + * Normally we haven't parsed the parent + * yet, so we won't have a parent of a parent + * here. However, it may turn out that we've + * reached this commit some other way (where it + * wasn't uninteresting), in which case we need + * to mark its parents recursively too.. + */ + if (commit->object.flags & UNINTERESTING) { + while (parent) { + struct commit *p = parent->item; + parent = parent->next; + parse_commit(p); + p->object.flags |= UNINTERESTING; + if (p->parents) + mark_parents_uninteresting(p); + if (p->object.flags & SEEN) + continue; + p->object.flags |= SEEN; + insert_by_date(p, list); } + return; + } + + /* + * Ok, the commit wasn't uninteresting. Try to + * simplify the commit history and find the parent + * that has no differences in the path set if one exists. + */ + if (paths) + try_to_simplify_commit(commit); + + parent = commit->parents; + while (parent) { + struct commit *p = parent->item; + + parent = parent->next; + + parse_commit(p); + if (p->object.flags & SEEN) + continue; + p->object.flags |= SEEN; + insert_by_date(p, list); } } @@ -382,13 +686,18 @@ static struct commit_list *limit_list(struct commit_list *list) struct commit_list *newlist = NULL; struct commit_list **p = &newlist; while (list) { - struct commit *commit = pop_most_recent_commit(&list, SEEN); + struct commit_list *entry = list; + struct commit *commit = list->item; struct object *obj = &commit->object; + list = list->next; + free(entry); + if (max_age != -1 && (commit->date < max_age)) obj->flags |= UNINTERESTING; if (unpacked && has_sha1_pack(obj->sha1)) obj->flags |= UNINTERESTING; + add_parents_to_list(commit, &list); if (obj->flags & UNINTERESTING) { mark_parents_uninteresting(commit); if (everybody_uninteresting(list)) @@ -408,16 +717,13 @@ static struct commit_list *limit_list(struct commit_list *list) static void add_pending_object(struct object *obj, const char *name) { - add_object(obj, &pending_objects, name); + add_object(obj, &pending_objects, NULL, name); } -static struct commit *get_commit_reference(const char *name, unsigned int flags) +static struct commit *get_commit_reference(const char *name, const unsigned char *sha1, unsigned int flags) { - unsigned char sha1[20]; struct object *object; - if (get_sha1(name, sha1)) - usage(rev_list_usage); object = parse_object(sha1); if (!object) die("bad object %s", name); @@ -495,7 +801,7 @@ static struct commit_list **global_lst; static int include_one_commit(const char *path, const unsigned char *sha1) { - struct commit *com = get_commit_reference(path, 0); + struct commit *com = get_commit_reference(path, sha1, 0); handle_one_commit(com, global_lst); return 0; } @@ -507,18 +813,34 @@ static void handle_all(struct commit_list **lst) global_lst = NULL; } -int main(int argc, char **argv) +int main(int argc, const char **argv) { + const char *prefix = setup_git_directory(); struct commit_list *list = NULL; int i, limited = 0; - setup_git_directory(); for (i = 1 ; i < argc; i++) { int flags; - char *arg = argv[i]; + const char *arg = argv[i]; char *dotdot; struct commit *commit; + unsigned char sha1[20]; + /* accept -, like traditilnal "head" */ + if ((*arg == '-') && isdigit(arg[1])) { + max_count = atoi(arg + 1); + continue; + } + if (!strcmp(arg, "-n")) { + if (++i >= argc) + die("-n requires an argument"); + max_count = atoi(argv[i]); + continue; + } + if (!strncmp(arg,"-n",2)) { + max_count = atoi(arg + 2); + continue; + } if (!strncmp(arg, "--max-count=", 12)) { max_count = atoi(arg + 12); continue; @@ -537,6 +859,18 @@ int main(int argc, char **argv) verbose_header = 1; continue; } + if (!strcmp(arg, "--no-abbrev")) { + abbrev = 0; + continue; + } + if (!strncmp(arg, "--abbrev=", 9)) { + abbrev = strtoul(arg + 9, NULL, 10); + if (abbrev && abbrev < MINIMUM_ABBREV) + abbrev = MINIMUM_ABBREV; + else if (40 < abbrev) + abbrev = 40; + continue; + } if (!strncmp(arg, "--pretty", 8)) { commit_format = get_commit_format(arg+8); verbose_header = 1; @@ -569,6 +903,13 @@ int main(int argc, char **argv) blob_objects = 1; continue; } + if (!strcmp(arg, "--objects-edge")) { + tag_objects = 1; + tree_objects = 1; + blob_objects = 1; + edge_hint = 1; + continue; + } if (!strcmp(arg, "--unpacked")) { unpacked = 1; limited = 1; @@ -584,9 +925,32 @@ int main(int argc, char **argv) } if (!strcmp(arg, "--topo-order")) { topo_order = 1; + lifo = 1; limited = 1; continue; } + if (!strcmp(arg, "--date-order")) { + topo_order = 1; + lifo = 0; + limited = 1; + continue; + } + if (!strcmp(arg, "--dense")) { + dense = 1; + continue; + } + if (!strcmp(arg, "--sparse")) { + dense = 0; + continue; + } + if (!strcmp(arg, "--remove-empty")) { + remove_empty_trees = 1; + continue; + } + if (!strcmp(arg, "--")) { + i++; + break; + } if (show_breaks && !merge_order) usage(rev_list_usage); @@ -594,15 +958,19 @@ int main(int argc, char **argv) flags = 0; dotdot = strstr(arg, ".."); if (dotdot) { + unsigned char from_sha1[20]; char *next = dotdot + 2; - struct commit *exclude = NULL; - struct commit *include = NULL; *dotdot = 0; if (!*next) next = "HEAD"; - exclude = get_commit_reference(arg, UNINTERESTING); - include = get_commit_reference(next, 0); - if (exclude && include) { + if (!get_sha1(arg, from_sha1) && !get_sha1(next, sha1)) { + struct commit *exclude; + struct commit *include; + + exclude = get_commit_reference(arg, from_sha1, UNINTERESTING); + include = get_commit_reference(next, sha1, 0); + if (!exclude || !include) + die("Invalid revision range %s..%s", arg, next); limited = 1; handle_one_commit(exclude, &list); handle_one_commit(include, &list); @@ -615,10 +983,26 @@ int main(int argc, char **argv) arg++; limited = 1; } - commit = get_commit_reference(arg, flags); + if (get_sha1(arg, sha1) < 0) { + struct stat st; + if (lstat(arg, &st) < 0) + die("'%s': %s", arg, strerror(errno)); + break; + } + commit = get_commit_reference(arg, sha1, flags); handle_one_commit(commit, &list); } + if (!list && + (!(tag_objects||tree_objects||blob_objects) && !pending_objects)) + usage(rev_list_usage); + + paths = get_pathspec(prefix, argv + i); + if (paths) { + limited = 1; + diff_tree_setup_paths(paths); + } + save_commit_buffer = verbose_header; track_object_refs = 0; @@ -632,7 +1016,7 @@ int main(int argc, char **argv) if (limited) list = limit_list(list); if (topo_order) - sort_in_topological_order(&list); + sort_in_topological_order(&list, lifo); show_commit_list(list); } else { #ifndef NO_OPENSSL