diff options
Diffstat (limited to 'third_party/git/list-objects.c')
| -rw-r--r-- | third_party/git/list-objects.c | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/third_party/git/list-objects.c b/third_party/git/list-objects.c new file mode 100644 index 000000000000..e19589baa045 --- /dev/null +++ b/third_party/git/list-objects.c @@ -0,0 +1,423 @@ +#include "cache.h" +#include "tag.h" +#include "commit.h" +#include "tree.h" +#include "blob.h" +#include "diff.h" +#include "tree-walk.h" +#include "revision.h" +#include "list-objects.h" +#include "list-objects-filter.h" +#include "list-objects-filter-options.h" +#include "packfile.h" +#include "object-store.h" +#include "trace.h" + +struct traversal_context { + struct rev_info *revs; + show_object_fn show_object; + show_commit_fn show_commit; + void *show_data; + struct filter *filter; +}; + +static void process_blob(struct traversal_context *ctx, + struct blob *blob, + struct strbuf *path, + const char *name) +{ + struct object *obj = &blob->object; + size_t pathlen; + enum list_objects_filter_result r; + + if (!ctx->revs->blob_objects) + return; + if (!obj) + die("bad blob object"); + if (obj->flags & (UNINTERESTING | SEEN)) + return; + + /* + * Pre-filter known-missing objects when explicitly requested. + * Otherwise, a missing object error message may be reported + * later (depending on other filtering criteria). + * + * Note that this "--exclude-promisor-objects" pre-filtering + * may cause the actual filter to report an incomplete list + * of missing objects. + */ + if (ctx->revs->exclude_promisor_objects && + !has_object_file(&obj->oid) && + is_promisor_object(&obj->oid)) + return; + + pathlen = path->len; + strbuf_addstr(path, name); + r = list_objects_filter__filter_object(ctx->revs->repo, + LOFS_BLOB, obj, + path->buf, &path->buf[pathlen], + ctx->filter); + if (r & LOFR_MARK_SEEN) + obj->flags |= SEEN; + if (r & LOFR_DO_SHOW) + ctx->show_object(obj, path->buf, ctx->show_data); + strbuf_setlen(path, pathlen); +} + +/* + * Processing a gitlink entry currently does nothing, since + * we do not recurse into the subproject. + * + * We *could* eventually add a flag that actually does that, + * which would involve: + * - is the subproject actually checked out? + * - if so, see if the subproject has already been added + * to the alternates list, and add it if not. + * - process the commit (or tag) the gitlink points to + * recursively. + * + * However, it's unclear whether there is really ever any + * reason to see superprojects and subprojects as such a + * "unified" object pool (potentially resulting in a totally + * humongous pack - avoiding which was the whole point of + * having gitlinks in the first place!). + * + * So for now, there is just a note that we *could* follow + * the link, and how to do it. Whether it necessarily makes + * any sense what-so-ever to ever do that is another issue. + */ +static void process_gitlink(struct traversal_context *ctx, + const unsigned char *sha1, + struct strbuf *path, + const char *name) +{ + /* Nothing to do */ +} + +static void process_tree(struct traversal_context *ctx, + struct tree *tree, + struct strbuf *base, + const char *name); + +static void process_tree_contents(struct traversal_context *ctx, + struct tree *tree, + struct strbuf *base) +{ + struct tree_desc desc; + struct name_entry entry; + enum interesting match = ctx->revs->diffopt.pathspec.nr == 0 ? + all_entries_interesting : entry_not_interesting; + + init_tree_desc(&desc, tree->buffer, tree->size); + + while (tree_entry(&desc, &entry)) { + if (match != all_entries_interesting) { + match = tree_entry_interesting(ctx->revs->repo->index, + &entry, base, 0, + &ctx->revs->diffopt.pathspec); + if (match == all_entries_not_interesting) + break; + if (match == entry_not_interesting) + continue; + } + + if (S_ISDIR(entry.mode)) { + struct tree *t = lookup_tree(ctx->revs->repo, &entry.oid); + if (!t) { + die(_("entry '%s' in tree %s has tree mode, " + "but is not a tree"), + entry.path, oid_to_hex(&tree->object.oid)); + } + t->object.flags |= NOT_USER_GIVEN; + process_tree(ctx, t, base, entry.path); + } + else if (S_ISGITLINK(entry.mode)) + process_gitlink(ctx, entry.oid.hash, + base, entry.path); + else { + struct blob *b = lookup_blob(ctx->revs->repo, &entry.oid); + if (!b) { + die(_("entry '%s' in tree %s has blob mode, " + "but is not a blob"), + entry.path, oid_to_hex(&tree->object.oid)); + } + b->object.flags |= NOT_USER_GIVEN; + process_blob(ctx, b, base, entry.path); + } + } +} + +static void process_tree(struct traversal_context *ctx, + struct tree *tree, + struct strbuf *base, + const char *name) +{ + struct object *obj = &tree->object; + struct rev_info *revs = ctx->revs; + int baselen = base->len; + enum list_objects_filter_result r; + int failed_parse; + + if (!revs->tree_objects) + return; + if (!obj) + die("bad tree object"); + if (obj->flags & (UNINTERESTING | SEEN)) + return; + + failed_parse = parse_tree_gently(tree, 1); + if (failed_parse) { + if (revs->ignore_missing_links) + return; + + /* + * Pre-filter known-missing tree objects when explicitly + * requested. This may cause the actual filter to report + * an incomplete list of missing objects. + */ + if (revs->exclude_promisor_objects && + is_promisor_object(&obj->oid)) + return; + + if (!revs->do_not_die_on_missing_tree) + die("bad tree object %s", oid_to_hex(&obj->oid)); + } + + strbuf_addstr(base, name); + r = list_objects_filter__filter_object(ctx->revs->repo, + LOFS_BEGIN_TREE, obj, + base->buf, &base->buf[baselen], + ctx->filter); + if (r & LOFR_MARK_SEEN) + obj->flags |= SEEN; + if (r & LOFR_DO_SHOW) + ctx->show_object(obj, base->buf, ctx->show_data); + if (base->len) + strbuf_addch(base, '/'); + + if (r & LOFR_SKIP_TREE) + trace_printf("Skipping contents of tree %s...\n", base->buf); + else if (!failed_parse) + process_tree_contents(ctx, tree, base); + + r = list_objects_filter__filter_object(ctx->revs->repo, + LOFS_END_TREE, obj, + base->buf, &base->buf[baselen], + ctx->filter); + if (r & LOFR_MARK_SEEN) + obj->flags |= SEEN; + if (r & LOFR_DO_SHOW) + ctx->show_object(obj, base->buf, ctx->show_data); + + strbuf_setlen(base, baselen); + free_tree_buffer(tree); +} + +static void mark_edge_parents_uninteresting(struct commit *commit, + struct rev_info *revs, + show_edge_fn show_edge) +{ + 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(revs->repo, get_commit_tree(parent)); + if (revs->edge_hint && !(parent->object.flags & SHOWN)) { + parent->object.flags |= SHOWN; + show_edge(parent); + } + } +} + +static void add_edge_parents(struct commit *commit, + struct rev_info *revs, + show_edge_fn show_edge, + struct oidset *set) +{ + struct commit_list *parents; + + for (parents = commit->parents; parents; parents = parents->next) { + struct commit *parent = parents->item; + struct tree *tree = get_commit_tree(parent); + + if (!tree) + continue; + + oidset_insert(set, &tree->object.oid); + + if (!(parent->object.flags & UNINTERESTING)) + continue; + tree->object.flags |= UNINTERESTING; + + if (revs->edge_hint && !(parent->object.flags & SHOWN)) { + parent->object.flags |= SHOWN; + show_edge(parent); + } + } +} + +void mark_edges_uninteresting(struct rev_info *revs, + show_edge_fn show_edge, + int sparse) +{ + struct commit_list *list; + int i; + + if (sparse) { + struct oidset set; + oidset_init(&set, 16); + + for (list = revs->commits; list; list = list->next) { + struct commit *commit = list->item; + struct tree *tree = get_commit_tree(commit); + + if (commit->object.flags & UNINTERESTING) + tree->object.flags |= UNINTERESTING; + + oidset_insert(&set, &tree->object.oid); + add_edge_parents(commit, revs, show_edge, &set); + } + + mark_trees_uninteresting_sparse(revs->repo, &set); + oidset_clear(&set); + } else { + for (list = revs->commits; list; list = list->next) { + struct commit *commit = list->item; + if (commit->object.flags & UNINTERESTING) { + mark_tree_uninteresting(revs->repo, + get_commit_tree(commit)); + if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) { + commit->object.flags |= SHOWN; + show_edge(commit); + } + continue; + } + mark_edge_parents_uninteresting(commit, revs, show_edge); + } + } + + if (revs->edge_hint_aggressive) { + for (i = 0; i < revs->cmdline.nr; i++) { + struct object *obj = revs->cmdline.rev[i].item; + struct commit *commit = (struct commit *)obj; + if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING)) + continue; + mark_tree_uninteresting(revs->repo, + get_commit_tree(commit)); + if (!(obj->flags & SHOWN)) { + obj->flags |= SHOWN; + show_edge(commit); + } + } + } +} + +static void add_pending_tree(struct rev_info *revs, struct tree *tree) +{ + add_pending_object(revs, &tree->object, ""); +} + +static void traverse_trees_and_blobs(struct traversal_context *ctx, + struct strbuf *base) +{ + int i; + + assert(base->len == 0); + + for (i = 0; i < ctx->revs->pending.nr; i++) { + struct object_array_entry *pending = ctx->revs->pending.objects + i; + struct object *obj = pending->item; + const char *name = pending->name; + const char *path = pending->path; + if (obj->flags & (UNINTERESTING | SEEN)) + continue; + if (obj->type == OBJ_TAG) { + obj->flags |= SEEN; + ctx->show_object(obj, name, ctx->show_data); + continue; + } + if (!path) + path = ""; + if (obj->type == OBJ_TREE) { + process_tree(ctx, (struct tree *)obj, base, path); + continue; + } + if (obj->type == OBJ_BLOB) { + process_blob(ctx, (struct blob *)obj, base, path); + continue; + } + die("unknown pending object %s (%s)", + oid_to_hex(&obj->oid), name); + } + object_array_clear(&ctx->revs->pending); +} + +static void do_traverse(struct traversal_context *ctx) +{ + struct commit *commit; + struct strbuf csp; /* callee's scratch pad */ + strbuf_init(&csp, PATH_MAX); + + while ((commit = get_revision(ctx->revs)) != NULL) { + /* + * an uninteresting boundary commit may not have its tree + * parsed yet, but we are not going to show them anyway + */ + if (!ctx->revs->tree_objects) + ; /* do not bother loading tree */ + else if (get_commit_tree(commit)) { + struct tree *tree = get_commit_tree(commit); + tree->object.flags |= NOT_USER_GIVEN; + add_pending_tree(ctx->revs, tree); + } else if (commit->object.parsed) { + die(_("unable to load root tree for commit %s"), + oid_to_hex(&commit->object.oid)); + } + ctx->show_commit(commit, ctx->show_data); + + if (ctx->revs->tree_blobs_in_commit_order) + /* + * NEEDSWORK: Adding the tree and then flushing it here + * needs a reallocation for each commit. Can we pass the + * tree directory without allocation churn? + */ + traverse_trees_and_blobs(ctx, &csp); + } + traverse_trees_and_blobs(ctx, &csp); + strbuf_release(&csp); +} + +void traverse_commit_list(struct rev_info *revs, + show_commit_fn show_commit, + show_object_fn show_object, + void *show_data) +{ + struct traversal_context ctx; + ctx.revs = revs; + ctx.show_commit = show_commit; + ctx.show_object = show_object; + ctx.show_data = show_data; + ctx.filter = NULL; + do_traverse(&ctx); +} + +void traverse_commit_list_filtered( + struct list_objects_filter_options *filter_options, + struct rev_info *revs, + show_commit_fn show_commit, + show_object_fn show_object, + void *show_data, + struct oidset *omitted) +{ + struct traversal_context ctx; + + ctx.revs = revs; + ctx.show_object = show_object; + ctx.show_commit = show_commit; + ctx.show_data = show_data; + ctx.filter = list_objects_filter__init(omitted, filter_options); + do_traverse(&ctx); + list_objects_filter__free(ctx.filter); +} |