#include "cache.h"
+#include "refs.h"
+#include "tag.h"
#include "commit.h"
+#include "tree.h"
+#include "blob.h"
+#include "epoch.h"
+#include "diff.h"
+#include "revision.h"
-#define SEEN (1u << 0)
-#define INTERESTING (1u << 1)
-#define UNINTERESTING (1u << 2)
+/* bits #0 and #1 in revision.h */
+
+#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[] =
- "usage: git-rev-list [OPTION] commit-id <commit-id>\n"
- " --max-count=nr\n"
- " --max-age=epoch\n"
- " --min-age=epoch\n"
- " --header";
+"git-rev-list [OPTION] <commit-id>... [ -- 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"
+;
+
+struct rev_info revs;
+
+static int bisect_list = 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 = "";
+static enum cmit_fmt commit_format = CMIT_FMT_RAW;
+static int merge_order = 0;
+static int show_breaks = 0;
+static int stop_traversal = 0;
+static int no_merges = 0;
+
+static void show_commit(struct commit *commit)
+{
+ commit->object.flags |= SHOWN;
+ if (show_breaks) {
+ commit_prefix = "| ";
+ if (commit->object.flags & DISCONTINUITY) {
+ commit_prefix = "^ ";
+ } else if (commit->object.flags & BOUNDARY) {
+ commit_prefix = "= ";
+ }
+ }
+ printf("%s%s", commit_prefix, sha1_to_hex(commit->object.sha1));
+ if (show_parents) {
+ struct commit_list *parents = commit->parents;
+ while (parents) {
+ 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(' ');
+ else
+ putchar('\n');
+
+ if (verbose_header) {
+ static char pretty_header[16384];
+ 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))
+ return STOP;
+ if (commit->object.flags & (UNINTERESTING|SHOWN))
+ return CONTINUE;
+ if (revs.min_age != -1 && (commit->date > revs.min_age))
+ return CONTINUE;
+ if (revs.max_age != -1 && (commit->date < revs.max_age)) {
+ stop_traversal=1;
+ return CONTINUE;
+ }
+ if (no_merges && (commit->parents && commit->parents->next))
+ return CONTINUE;
+ if (revs.paths && revs.dense) {
+ if (!(commit->object.flags & TREECHANGE))
+ return CONTINUE;
+ rewrite_parents(commit);
+ }
+ return DO;
+}
-static void mark_parents_uninteresting(struct commit *commit)
+static int process_commit(struct commit * commit)
{
- struct commit_list *parents = commit->parents;
+ int action=filter_commit(commit);
+
+ if (action == STOP) {
+ return STOP;
+ }
+
+ if (action == CONTINUE) {
+ return CONTINUE;
+ }
+
+ if (revs.max_count != -1 && !revs.max_count--)
+ return STOP;
- while (parents) {
- struct commit *commit = parents->item;
- commit->object.flags |= UNINTERESTING;
- parents = parents->next;
+ show_commit(commit);
+
+ return CONTINUE;
+}
+
+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;
+
+ if (!revs.blob_objects)
+ return p;
+ if (obj->flags & (UNINTERESTING | SEEN))
+ return p;
+ obj->flags |= SEEN;
+ return add_object(obj, p, path, 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 (!revs.tree_objects)
+ return p;
+ if (obj->flags & (UNINTERESTING | SEEN))
+ return p;
+ if (parse_tree(tree) < 0)
+ die("bad tree object %s", sha1_to_hex(obj->sha1));
+ obj->flags |= SEEN;
+ 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, &me, entry->name);
+ else
+ p = process_blob(entry->item.blob, p, &me, entry->name);
+ free(entry);
+ entry = next;
+ }
+ return p;
+}
+
+static void show_commit_list(struct commit_list *list)
+{
+ struct object_list *objects = NULL, **p = &objects, *pending;
+ while (list) {
+ struct commit *commit = pop_most_recent_commit(&list, SEEN);
+
+ p = process_tree(commit->tree, p, NULL, "");
+ if (process_commit(commit) == STOP)
+ break;
+ }
+ for (pending = revs.pending_objects; pending; pending = pending->next) {
+ struct object *obj = pending->item;
+ const char *name = pending->name;
+ if (obj->flags & (UNINTERESTING | SEEN))
+ continue;
+ if (obj->type == tag_type) {
+ obj->flags |= SEEN;
+ p = add_object(obj, p, NULL, name);
+ continue;
+ }
+ if (obj->type == tree_type) {
+ p = process_tree((struct tree *)obj, p, NULL, name);
+ continue;
+ }
+ if (obj->type == blob_type) {
+ 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\n0000000..." can be used to
+ * confuse downstream git-pack-objects very badly.
+ */
+ const char *ep = strchr(objects->name, '\n');
+ if (ep) {
+ printf("%s %.*s\n", sha1_to_hex(objects->item->sha1),
+ (int) (ep - objects->name),
+ objects->name);
+ }
+ else
+ printf("%s %s\n", sha1_to_hex(objects->item->sha1), objects->name);
+ objects = objects->next;
}
}
-static int everybody_uninteresting(struct commit_list *list)
+static int everybody_uninteresting(struct commit_list *orig)
{
+ struct commit_list *list = orig;
while (list) {
struct commit *commit = list->item;
list = list->next;
return 1;
}
-int main(int argc, char **argv)
+/*
+ * This is a truly stupid algorithm, but it's only
+ * used for bisection, and we just don't care enough.
+ *
+ * We care just barely enough to avoid recursing for
+ * non-merge entries.
+ */
+static int count_distance(struct commit_list *entry)
+{
+ int nr = 0;
+
+ while (entry) {
+ struct commit *commit = entry->item;
+ struct commit_list *p;
+
+ if (commit->object.flags & (UNINTERESTING | COUNTED))
+ break;
+ if (!revs.paths || (commit->object.flags & TREECHANGE))
+ nr++;
+ commit->object.flags |= COUNTED;
+ p = commit->parents;
+ entry = p;
+ if (p) {
+ p = p->next;
+ while (p) {
+ nr += count_distance(p);
+ p = p->next;
+ }
+ }
+ }
+
+ return nr;
+}
+
+static void clear_distance(struct commit_list *list)
+{
+ while (list) {
+ struct commit *commit = list->item;
+ commit->object.flags &= ~COUNTED;
+ list = list->next;
+ }
+}
+
+static struct commit_list *find_bisection(struct commit_list *list)
{
- int nr_sha;
- unsigned char sha1[2][20];
- struct commit_list *list = NULL;
- struct commit *commit, *end;
- int i, verbose_header = 0, show_parents = 0;
- unsigned long max_age = -1;
- unsigned long min_age = -1;
- int max_count = -1;
+ int nr, closest;
+ struct commit_list *p, *best;
+
+ nr = 0;
+ p = list;
+ while (p) {
+ if (!revs.paths || (p->item->object.flags & TREECHANGE))
+ nr++;
+ p = p->next;
+ }
+ closest = 0;
+ best = list;
+
+ for (p = list; p; p = p->next) {
+ int distance;
+
+ if (revs.paths && !(p->item->object.flags & TREECHANGE))
+ continue;
+
+ distance = count_distance(p);
+ clear_distance(list);
+ if (nr - distance < distance)
+ distance = nr - distance;
+ if (distance > closest) {
+ best = p;
+ closest = distance;
+ }
+ }
+ 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 (revs.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 *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;
+}
+
+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 (revs.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 (revs.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);
+ }
+}
+
+static struct commit_list *limit_list(struct commit_list *list)
+{
+ struct commit_list *newlist = NULL;
+ struct commit_list **p = &newlist;
+ while (list) {
+ struct commit_list *entry = list;
+ struct commit *commit = list->item;
+ struct object *obj = &commit->object;
+
+ list = list->next;
+ free(entry);
+
+ if (revs.max_age != -1 && (commit->date < revs.max_age))
+ obj->flags |= UNINTERESTING;
+ if (revs.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))
+ break;
+ continue;
+ }
+ if (revs.min_age != -1 && (commit->date > revs.min_age))
+ continue;
+ p = &commit_list_insert(commit, p)->next;
+ }
+ if (revs.tree_objects)
+ mark_edges_uninteresting(newlist);
+ if (bisect_list)
+ newlist = find_bisection(newlist);
+ return newlist;
+}
+
+int main(int argc, const char **argv)
+{
+ struct commit_list *list;
+ int i;
+
+ argc = setup_revisions(argc, argv, &revs);
- nr_sha = 0;
for (i = 1 ; i < argc; i++) {
- char *arg = argv[i];
+ const char *arg = argv[i];
- if (!strncmp(arg, "--max-count=", 12)) {
- max_count = atoi(arg + 12);
+ /* accept -<digit>, like traditilnal "head" */
+ if ((*arg == '-') && isdigit(arg[1])) {
+ revs.max_count = atoi(arg + 1);
continue;
}
- if (!strncmp(arg, "--max-age=", 10)) {
- max_age = atoi(arg + 10);
+ if (!strcmp(arg, "-n")) {
+ if (++i >= argc)
+ die("-n requires an argument");
+ revs.max_count = atoi(argv[i]);
continue;
}
- if (!strncmp(arg, "--min-age=", 10)) {
- min_age = atoi(arg + 10);
+ if (!strncmp(arg,"-n",2)) {
+ revs.max_count = atoi(arg + 2);
continue;
}
if (!strcmp(arg, "--header")) {
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;
+ hdr_termination = '\n';
+ if (commit_format == CMIT_FMT_ONELINE)
+ commit_prefix = "";
+ else
+ commit_prefix = "commit ";
+ continue;
+ }
+ if (!strncmp(arg, "--no-merges", 11)) {
+ no_merges = 1;
+ continue;
+ }
if (!strcmp(arg, "--parents")) {
show_parents = 1;
continue;
}
+ if (!strcmp(arg, "--bisect")) {
+ bisect_list = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--merge-order")) {
+ merge_order = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--show-breaks")) {
+ show_breaks = 1;
+ continue;
+ }
+ usage(rev_list_usage);
- if (nr_sha > 2 || get_sha1(arg, sha1[nr_sha]))
- usage(rev_list_usage);
- nr_sha++;
}
- if (!nr_sha)
+ list = revs.commits;
+
+ if (!list &&
+ (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) && !revs.pending_objects))
usage(rev_list_usage);
- commit = lookup_commit_reference(sha1[0]);
- if (!commit || parse_commit(commit) < 0)
- die("bad starting commit object");
-
- end = NULL;
- if (nr_sha > 1) {
- end = lookup_commit_reference(sha1[1]);
- if (!end || parse_commit(end) < 0)
- die("bad ending commit object");
- }
-
- commit_list_insert(commit, &list);
- if (end) {
- struct commit_list *newlist = NULL;
- struct commit_list **p = &newlist;
- do {
- struct commit *commit = pop_most_recent_commit(&list, SEEN);
- struct object *obj = &commit->object;
-
- if (commit == end || (obj->flags & UNINTERESTING)) {
- mark_parents_uninteresting(commit);
- if (everybody_uninteresting(list))
- break;
- continue;
- }
- p = &commit_list_insert(commit, p)->next;
- } while (list);
- list = newlist;
- }
+ if (revs.paths)
+ diff_tree_setup_paths(revs.paths);
- while (list) {
- struct commit *commit = pop_most_recent_commit(&list, SEEN);
+ save_commit_buffer = verbose_header;
+ track_object_refs = 0;
- if (commit->object.flags & UNINTERESTING)
- continue;
- if (min_age != -1 && (commit->date > min_age))
- continue;
- if (max_age != -1 && (commit->date < max_age))
- break;
- if (max_count != -1 && !max_count--)
- break;
- printf("%s", sha1_to_hex(commit->object.sha1));
- if (show_parents) {
- struct commit_list *parents = commit->parents;
- while (parents) {
- printf(" %s", sha1_to_hex(parents->item->object.sha1));
- parents = parents->next;
- }
+ if (!merge_order) {
+ sort_by_date(&list);
+ if (list && !revs.limited && revs.max_count == 1 &&
+ !revs.tag_objects && !revs.tree_objects && !revs.blob_objects) {
+ show_commit(list->item);
+ return 0;
}
- putchar('\n');
- if (verbose_header)
- printf("%s%c", commit->buffer, 0);
+ if (revs.limited)
+ list = limit_list(list);
+ if (revs.topo_order)
+ sort_in_topological_order(&list, revs.lifo);
+ show_commit_list(list);
+ } else {
+#ifndef NO_OPENSSL
+ if (sort_list_in_merge_order(list, &process_commit)) {
+ die("merge order sort failed\n");
+ }
+#else
+ die("merge order sort unsupported, OpenSSL not linked");
+#endif
}
+
return 0;
}
projects / git.git / blobdiff