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-rw-r--r--builtin-rev-list.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/builtin-rev-list.c b/builtin-rev-list.c
new file mode 100644
index 0000000000..446802d377
--- /dev/null
+++ b/builtin-rev-list.c
@@ -0,0 +1,358 @@
+#include "cache.h"
+#include "refs.h"
+#include "tag.h"
+#include "commit.h"
+#include "tree.h"
+#include "blob.h"
+#include "tree-walk.h"
+#include "diff.h"
+#include "revision.h"
+#include "builtin.h"
+
+/* bits #0-15 in revision.h */
+
+#define COUNTED (1u<<16)
+
+static const char rev_list_usage[] =
+"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"
+" --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"
+" --abbrev-commit\n"
+" special purpose:\n"
+" --bisect"
+;
+
+static struct rev_info revs;
+
+static int bisect_list = 0;
+static int show_timestamp = 0;
+static int hdr_termination = 0;
+static const char *header_prefix;
+
+static void show_commit(struct commit *commit)
+{
+ if (show_timestamp)
+ printf("%lu ", commit->date);
+ if (header_prefix)
+ fputs(header_prefix, stdout);
+ if (commit->object.flags & BOUNDARY)
+ putchar('-');
+ if (revs.abbrev_commit && revs.abbrev)
+ fputs(find_unique_abbrev(commit->object.sha1, revs.abbrev),
+ stdout);
+ else
+ fputs(sha1_to_hex(commit->object.sha1), stdout);
+ if (revs.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 (revs.commit_format == CMIT_FMT_ONELINE)
+ putchar(' ');
+ else
+ putchar('\n');
+
+ if (revs.verbose_header) {
+ static char pretty_header[16384];
+ pretty_print_commit(revs.commit_format, commit, ~0,
+ pretty_header, sizeof(pretty_header),
+ revs.abbrev);
+ printf("%s%c", pretty_header, hdr_termination);
+ }
+ fflush(stdout);
+}
+
+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 rev_info *revs)
+{
+ struct commit *commit;
+ struct object_list *objects = NULL, **p = &objects, *pending;
+
+ while ((commit = get_revision(revs)) != NULL) {
+ p = process_tree(commit->tree, p, NULL, "");
+ show_commit(commit);
+ }
+ 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;
+ }
+}
+
+/*
+ * 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.prune_fn || (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, closest;
+ struct commit_list *p, *best;
+
+ nr = 0;
+ p = list;
+ while (p) {
+ if (!revs.prune_fn || (p->item->object.flags & TREECHANGE))
+ nr++;
+ p = p->next;
+ }
+ closest = 0;
+ best = list;
+
+ for (p = list; p; p = p->next) {
+ int distance;
+
+ if (revs.prune_fn && !(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);
+ }
+}
+
+int cmd_rev_list(int argc, const char **argv, char **envp)
+{
+ struct commit_list *list;
+ int i;
+
+ init_revisions(&revs);
+ revs.abbrev = 0;
+ revs.commit_format = CMIT_FMT_UNSPECIFIED;
+ argc = setup_revisions(argc, argv, &revs, NULL);
+
+ for (i = 1 ; i < argc; i++) {
+ const char *arg = argv[i];
+
+ if (!strcmp(arg, "--header")) {
+ revs.verbose_header = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--timestamp")) {
+ show_timestamp = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--bisect")) {
+ bisect_list = 1;
+ continue;
+ }
+ usage(rev_list_usage);
+
+ }
+ if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
+ /* The command line has a --pretty */
+ hdr_termination = '\n';
+ if (revs.commit_format == CMIT_FMT_ONELINE)
+ header_prefix = "";
+ else
+ header_prefix = "commit ";
+ }
+ else if (revs.verbose_header)
+ /* Only --header was specified */
+ revs.commit_format = CMIT_FMT_RAW;
+
+ list = revs.commits;
+
+ if ((!list &&
+ (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
+ !revs.pending_objects)) ||
+ revs.diff)
+ usage(rev_list_usage);
+
+ save_commit_buffer = revs.verbose_header;
+ track_object_refs = 0;
+ if (bisect_list)
+ revs.limited = 1;
+
+ prepare_revision_walk(&revs);
+ if (revs.tree_objects)
+ mark_edges_uninteresting(revs.commits);
+
+ if (bisect_list)
+ revs.commits = find_bisection(revs.commits);
+
+ show_commit_list(&revs);
+
+ return 0;
+}
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