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![Junio C Hamano](/assets/img/avatar_default.png)
"git describe" was taught to dig trees deeper to find a <commit-ish>:<path> that refers to a given blob object. * sb/describe-blob: builtin/describe.c: describe a blob builtin/describe.c: factor out describe_commit builtin/describe.c: print debug statements earlier builtin/describe.c: rename `oid` to avoid variable shadowing revision.h: introduce blob/tree walking in order of the commits list-objects.c: factor out traverse_trees_and_blobs t6120: fix typo in test name
323 lines
8.5 KiB
C
323 lines
8.5 KiB
C
#include "cache.h"
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#include "tag.h"
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#include "commit.h"
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#include "tree.h"
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#include "blob.h"
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#include "diff.h"
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#include "tree-walk.h"
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#include "revision.h"
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#include "list-objects.h"
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#include "list-objects-filter.h"
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#include "list-objects-filter-options.h"
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static void process_blob(struct rev_info *revs,
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struct blob *blob,
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show_object_fn show,
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struct strbuf *path,
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const char *name,
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void *cb_data,
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filter_object_fn filter_fn,
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void *filter_data)
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{
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struct object *obj = &blob->object;
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size_t pathlen;
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enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
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if (!revs->blob_objects)
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return;
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if (!obj)
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die("bad blob object");
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if (obj->flags & (UNINTERESTING | SEEN))
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return;
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pathlen = path->len;
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strbuf_addstr(path, name);
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if (filter_fn)
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r = filter_fn(LOFS_BLOB, obj,
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path->buf, &path->buf[pathlen],
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filter_data);
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if (r & LOFR_MARK_SEEN)
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obj->flags |= SEEN;
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if (r & LOFR_DO_SHOW)
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show(obj, path->buf, cb_data);
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strbuf_setlen(path, pathlen);
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}
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/*
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* Processing a gitlink entry currently does nothing, since
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* we do not recurse into the subproject.
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*
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* We *could* eventually add a flag that actually does that,
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* which would involve:
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* - is the subproject actually checked out?
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* - if so, see if the subproject has already been added
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* to the alternates list, and add it if not.
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* - process the commit (or tag) the gitlink points to
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* recursively.
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*
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* However, it's unclear whether there is really ever any
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* reason to see superprojects and subprojects as such a
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* "unified" object pool (potentially resulting in a totally
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* humongous pack - avoiding which was the whole point of
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* having gitlinks in the first place!).
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*
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* So for now, there is just a note that we *could* follow
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* the link, and how to do it. Whether it necessarily makes
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* any sense what-so-ever to ever do that is another issue.
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*/
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static void process_gitlink(struct rev_info *revs,
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const unsigned char *sha1,
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show_object_fn show,
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struct strbuf *path,
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const char *name,
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void *cb_data)
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{
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/* Nothing to do */
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}
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static void process_tree(struct rev_info *revs,
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struct tree *tree,
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show_object_fn show,
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struct strbuf *base,
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const char *name,
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void *cb_data,
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filter_object_fn filter_fn,
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void *filter_data)
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{
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struct object *obj = &tree->object;
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struct tree_desc desc;
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struct name_entry entry;
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enum interesting match = revs->diffopt.pathspec.nr == 0 ?
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all_entries_interesting: entry_not_interesting;
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int baselen = base->len;
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enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
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if (!revs->tree_objects)
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return;
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if (!obj)
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die("bad tree object");
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if (obj->flags & (UNINTERESTING | SEEN))
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return;
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if (parse_tree_gently(tree, revs->ignore_missing_links) < 0) {
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if (revs->ignore_missing_links)
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return;
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die("bad tree object %s", oid_to_hex(&obj->oid));
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}
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strbuf_addstr(base, name);
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if (filter_fn)
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r = filter_fn(LOFS_BEGIN_TREE, obj,
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base->buf, &base->buf[baselen],
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filter_data);
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if (r & LOFR_MARK_SEEN)
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obj->flags |= SEEN;
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if (r & LOFR_DO_SHOW)
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show(obj, base->buf, cb_data);
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if (base->len)
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strbuf_addch(base, '/');
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init_tree_desc(&desc, tree->buffer, tree->size);
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while (tree_entry(&desc, &entry)) {
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if (match != all_entries_interesting) {
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match = tree_entry_interesting(&entry, base, 0,
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&revs->diffopt.pathspec);
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if (match == all_entries_not_interesting)
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break;
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if (match == entry_not_interesting)
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continue;
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}
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if (S_ISDIR(entry.mode))
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process_tree(revs,
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lookup_tree(entry.oid),
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show, base, entry.path,
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cb_data, filter_fn, filter_data);
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else if (S_ISGITLINK(entry.mode))
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process_gitlink(revs, entry.oid->hash,
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show, base, entry.path,
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cb_data);
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else
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process_blob(revs,
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lookup_blob(entry.oid),
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show, base, entry.path,
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cb_data, filter_fn, filter_data);
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}
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if (filter_fn) {
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r = filter_fn(LOFS_END_TREE, obj,
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base->buf, &base->buf[baselen],
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filter_data);
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if (r & LOFR_MARK_SEEN)
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obj->flags |= SEEN;
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if (r & LOFR_DO_SHOW)
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show(obj, base->buf, cb_data);
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}
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strbuf_setlen(base, baselen);
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free_tree_buffer(tree);
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}
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static void mark_edge_parents_uninteresting(struct commit *commit,
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struct rev_info *revs,
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show_edge_fn show_edge)
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{
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struct commit_list *parents;
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for (parents = commit->parents; parents; parents = parents->next) {
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struct commit *parent = parents->item;
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if (!(parent->object.flags & UNINTERESTING))
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continue;
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mark_tree_uninteresting(parent->tree);
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if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
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parent->object.flags |= SHOWN;
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show_edge(parent);
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}
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}
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}
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void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
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{
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struct commit_list *list;
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int i;
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for (list = revs->commits; list; list = list->next) {
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struct commit *commit = list->item;
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if (commit->object.flags & UNINTERESTING) {
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mark_tree_uninteresting(commit->tree);
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if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
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commit->object.flags |= SHOWN;
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show_edge(commit);
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}
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continue;
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}
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mark_edge_parents_uninteresting(commit, revs, show_edge);
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}
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if (revs->edge_hint_aggressive) {
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for (i = 0; i < revs->cmdline.nr; i++) {
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struct object *obj = revs->cmdline.rev[i].item;
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struct commit *commit = (struct commit *)obj;
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if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
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continue;
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mark_tree_uninteresting(commit->tree);
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if (!(obj->flags & SHOWN)) {
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obj->flags |= SHOWN;
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show_edge(commit);
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}
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}
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}
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}
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static void add_pending_tree(struct rev_info *revs, struct tree *tree)
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{
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add_pending_object(revs, &tree->object, "");
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}
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static void traverse_trees_and_blobs(struct rev_info *revs,
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struct strbuf *base,
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show_object_fn show_object,
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void *show_data,
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filter_object_fn filter_fn,
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void *filter_data)
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{
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int i;
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assert(base->len == 0);
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for (i = 0; i < revs->pending.nr; i++) {
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struct object_array_entry *pending = revs->pending.objects + i;
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struct object *obj = pending->item;
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const char *name = pending->name;
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const char *path = pending->path;
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if (obj->flags & (UNINTERESTING | SEEN))
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continue;
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if (obj->type == OBJ_TAG) {
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obj->flags |= SEEN;
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show_object(obj, name, show_data);
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continue;
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}
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if (!path)
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path = "";
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if (obj->type == OBJ_TREE) {
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process_tree(revs, (struct tree *)obj, show_object,
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base, path, show_data,
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filter_fn, filter_data);
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continue;
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}
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if (obj->type == OBJ_BLOB) {
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process_blob(revs, (struct blob *)obj, show_object,
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base, path, show_data,
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filter_fn, filter_data);
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continue;
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}
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die("unknown pending object %s (%s)",
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oid_to_hex(&obj->oid), name);
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}
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object_array_clear(&revs->pending);
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}
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static void do_traverse(struct rev_info *revs,
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show_commit_fn show_commit,
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show_object_fn show_object,
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void *show_data,
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filter_object_fn filter_fn,
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void *filter_data)
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{
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struct commit *commit;
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struct strbuf csp; /* callee's scratch pad */
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strbuf_init(&csp, PATH_MAX);
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while ((commit = get_revision(revs)) != NULL) {
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/*
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* an uninteresting boundary commit may not have its tree
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* parsed yet, but we are not going to show them anyway
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*/
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if (commit->tree)
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add_pending_tree(revs, commit->tree);
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show_commit(commit, show_data);
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if (revs->tree_blobs_in_commit_order)
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/*
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* NEEDSWORK: Adding the tree and then flushing it here
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* needs a reallocation for each commit. Can we pass the
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* tree directory without allocation churn?
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*/
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traverse_trees_and_blobs(revs, &csp,
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show_object, show_data,
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filter_fn, filter_data);
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}
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traverse_trees_and_blobs(revs, &csp,
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show_object, show_data,
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filter_fn, filter_data);
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strbuf_release(&csp);
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}
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void traverse_commit_list(struct rev_info *revs,
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show_commit_fn show_commit,
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show_object_fn show_object,
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void *show_data)
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{
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do_traverse(revs, show_commit, show_object, show_data, NULL, NULL);
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}
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void traverse_commit_list_filtered(
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struct list_objects_filter_options *filter_options,
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struct rev_info *revs,
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show_commit_fn show_commit,
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show_object_fn show_object,
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void *show_data,
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struct oidset *omitted)
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{
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filter_object_fn filter_fn = NULL;
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filter_free_fn filter_free_fn = NULL;
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void *filter_data = NULL;
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filter_data = list_objects_filter__init(omitted, filter_options,
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&filter_fn, &filter_free_fn);
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do_traverse(revs, show_commit, show_object, show_data,
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filter_fn, filter_data);
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if (filter_data && filter_free_fn)
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filter_free_fn(filter_data);
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}
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