cat-file: use "type" and "size" from outer scope
[gitweb.git] / revision.c
index f40ccf14269a3325f4f3069ce931bb73e1d1f27e..75dda928ea6be1dacd2fbeba5c0ce207ea46dd25 100644 (file)
@@ -17,6 +17,7 @@
 #include "mailmap.h"
 #include "commit-slab.h"
 #include "dir.h"
+#include "cache-tree.h"
 
 volatile show_early_output_fn_t show_early_output;
 
@@ -86,16 +87,6 @@ void show_object_with_name(FILE *out, struct object *obj,
        fputc('\n', out);
 }
 
-void add_object(struct object *obj,
-               struct object_array *p,
-               struct name_path *path,
-               const char *name)
-{
-       char *pn = path_name(path, name);
-       add_object_array(obj, pn, p);
-       free(pn);
-}
-
 static void mark_blob_uninteresting(struct blob *blob)
 {
        if (!blob)
@@ -198,9 +189,10 @@ void mark_parents_uninteresting(struct commit *commit)
        }
 }
 
-static void add_pending_object_with_mode(struct rev_info *revs,
+static void add_pending_object_with_path(struct rev_info *revs,
                                         struct object *obj,
-                                        const char *name, unsigned mode)
+                                        const char *name, unsigned mode,
+                                        const char *path)
 {
        if (!obj)
                return;
@@ -220,7 +212,14 @@ static void add_pending_object_with_mode(struct rev_info *revs,
                if (st)
                        return;
        }
-       add_object_array_with_mode(obj, name, &revs->pending, mode);
+       add_object_array_with_path(obj, name, &revs->pending, mode, path);
+}
+
+static void add_pending_object_with_mode(struct rev_info *revs,
+                                        struct object *obj,
+                                        const char *name, unsigned mode)
+{
+       add_pending_object_with_path(revs, obj, name, mode, NULL);
 }
 
 void add_pending_object(struct rev_info *revs,
@@ -265,8 +264,12 @@ void add_pending_sha1(struct rev_info *revs, const char *name,
 }
 
 static struct commit *handle_commit(struct rev_info *revs,
-                                   struct object *object, const char *name)
+                                   struct object_array_entry *entry)
 {
+       struct object *object = entry->item;
+       const char *name = entry->name;
+       const char *path = entry->path;
+       unsigned int mode = entry->mode;
        unsigned long flags = object->flags;
 
        /*
@@ -285,6 +288,14 @@ static struct commit *handle_commit(struct rev_info *revs,
                        die("bad object %s", sha1_to_hex(tag->tagged->sha1));
                }
                object->flags |= flags;
+               /*
+                * We'll handle the tagged object by looping or dropping
+                * through to the non-tag handlers below. Do not
+                * propagate data from the tag's pending entry.
+                */
+               name = "";
+               path = NULL;
+               mode = 0;
        }
 
        /*
@@ -300,7 +311,7 @@ static struct commit *handle_commit(struct rev_info *revs,
                        revs->limited = 1;
                }
                if (revs->show_source && !commit->util)
-                       commit->util = (void *) name;
+                       commit->util = xstrdup(name);
                return commit;
        }
 
@@ -316,7 +327,7 @@ static struct commit *handle_commit(struct rev_info *revs,
                        mark_tree_contents_uninteresting(tree);
                        return NULL;
                }
-               add_pending_object(revs, object, "");
+               add_pending_object_with_path(revs, object, name, mode, path);
                return NULL;
        }
 
@@ -328,7 +339,7 @@ static struct commit *handle_commit(struct rev_info *revs,
                        return NULL;
                if (flags & UNINTERESTING)
                        return NULL;
-               add_pending_object(revs, object, "");
+               add_pending_object_with_path(revs, object, name, mode, path);
                return NULL;
        }
        die("%s is unknown object", name);
@@ -473,7 +484,7 @@ static int rev_compare_tree(struct rev_info *revs,
                 * If we are simplifying by decoration, then the commit
                 * is worth showing if it has a tag pointing at it.
                 */
-               if (lookup_decoration(&name_decoration, &commit->object))
+               if (get_name_decoration(&commit->object))
                        return REV_TREE_DIFFERENT;
                /*
                 * A commit that is not pointed by a tag is uninteresting
@@ -497,24 +508,14 @@ static int rev_compare_tree(struct rev_info *revs,
 static int rev_same_tree_as_empty(struct rev_info *revs, struct commit *commit)
 {
        int retval;
-       void *tree;
-       unsigned long size;
-       struct tree_desc empty, real;
        struct tree *t1 = commit->tree;
 
        if (!t1)
                return 0;
 
-       tree = read_object_with_reference(t1->object.sha1, tree_type, &size, NULL);
-       if (!tree)
-               return 0;
-       init_tree_desc(&real, tree, size);
-       init_tree_desc(&empty, "", 0);
-
        tree_difference = REV_TREE_SAME;
        DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES);
-       retval = diff_tree(&empty, &real, "", &revs->pruning);
-       free(tree);
+       retval = diff_tree_sha1(NULL, t1->object.sha1, "", &revs->pruning);
 
        return retval >= 0 && (tree_difference == REV_TREE_SAME);
 }
@@ -784,6 +785,10 @@ static int add_parents_to_list(struct rev_info *revs, struct commit *commit,
                return 0;
        commit->object.flags |= ADDED;
 
+       if (revs->include_check &&
+           !revs->include_check(commit, revs->include_check_data))
+               return 0;
+
        /*
         * If the commit is uninteresting, don't try to
         * prune parents - we want the maximal uninteresting
@@ -1192,7 +1197,7 @@ int ref_excluded(struct string_list *ref_excludes, const char *path)
        if (!ref_excludes)
                return 0;
        for_each_string_list_item(item, ref_excludes) {
-               if (!fnmatch(item->string, path, 0))
+               if (!wildmatch(item->string, path, 0, NULL))
                        return 1;
        }
        return 0;
@@ -1281,7 +1286,7 @@ static int handle_one_reflog(const char *path, const unsigned char *sha1, int fl
        return 0;
 }
 
-static void handle_reflog(struct rev_info *revs, unsigned flags)
+void add_reflogs_to_pending(struct rev_info *revs, unsigned flags)
 {
        struct all_refs_cb cb;
        cb.all_revs = revs;
@@ -1289,6 +1294,53 @@ static void handle_reflog(struct rev_info *revs, unsigned flags)
        for_each_reflog(handle_one_reflog, &cb);
 }
 
+static void add_cache_tree(struct cache_tree *it, struct rev_info *revs,
+                          struct strbuf *path)
+{
+       size_t baselen = path->len;
+       int i;
+
+       if (it->entry_count >= 0) {
+               struct tree *tree = lookup_tree(it->sha1);
+               add_pending_object_with_path(revs, &tree->object, "",
+                                            040000, path->buf);
+       }
+
+       for (i = 0; i < it->subtree_nr; i++) {
+               struct cache_tree_sub *sub = it->down[i];
+               strbuf_addf(path, "%s%s", baselen ? "/" : "", sub->name);
+               add_cache_tree(sub->cache_tree, revs, path);
+               strbuf_setlen(path, baselen);
+       }
+
+}
+
+void add_index_objects_to_pending(struct rev_info *revs, unsigned flags)
+{
+       int i;
+
+       read_cache();
+       for (i = 0; i < active_nr; i++) {
+               struct cache_entry *ce = active_cache[i];
+               struct blob *blob;
+
+               if (S_ISGITLINK(ce->ce_mode))
+                       continue;
+
+               blob = lookup_blob(ce->sha1);
+               if (!blob)
+                       die("unable to add index blob to traversal");
+               add_pending_object_with_path(revs, &blob->object, "",
+                                            ce->ce_mode, ce->name);
+       }
+
+       if (active_cache_tree) {
+               struct strbuf path = STRBUF_INIT;
+               add_cache_tree(active_cache_tree, revs, &path);
+               strbuf_release(&path);
+       }
+}
+
 static int add_parents_only(struct rev_info *revs, const char *arg_, int flags)
 {
        unsigned char sha1[20];
@@ -1403,7 +1455,7 @@ static void prepare_show_merge(struct rev_info *revs)
                        continue;
                if (ce_path_match(ce, &revs->prune_data, NULL)) {
                        prune_num++;
-                       prune = xrealloc(prune, sizeof(*prune) * prune_num);
+                       REALLOC_ARRAY(prune, prune_num);
                        prune[prune_num-2] = ce->name;
                        prune[prune_num-1] = NULL;
                }
@@ -1581,6 +1633,10 @@ static void read_revisions_from_stdin(struct rev_info *revs,
 {
        struct strbuf sb;
        int seen_dashdash = 0;
+       int save_warning;
+
+       save_warning = warn_on_object_refname_ambiguity;
+       warn_on_object_refname_ambiguity = 0;
 
        strbuf_init(&sb, 1000);
        while (strbuf_getwholeline(&sb, stdin, '\n') != EOF) {
@@ -1602,7 +1658,9 @@ static void read_revisions_from_stdin(struct rev_info *revs,
        }
        if (seen_dashdash)
                read_pathspec_from_stdin(revs, &sb, prune);
+
        strbuf_release(&sb);
+       warn_on_object_refname_ambiguity = save_warning;
 }
 
 static void add_grep(struct rev_info *revs, const char *ptn, enum grep_pat_token what)
@@ -1633,6 +1691,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
            !strcmp(arg, "--reflog") || !strcmp(arg, "--not") ||
            !strcmp(arg, "--no-walk") || !strcmp(arg, "--do-walk") ||
            !strcmp(arg, "--bisect") || starts_with(arg, "--glob=") ||
+           !strcmp(arg, "--indexed-objects") ||
+           starts_with(arg, "--exclude=") ||
            starts_with(arg, "--branches=") || starts_with(arg, "--tags=") ||
            starts_with(arg, "--remotes=") || starts_with(arg, "--no-walk="))
        {
@@ -1648,8 +1708,10 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
                revs->skip_count = atoi(optarg);
                return argcount;
        } else if ((*arg == '-') && isdigit(arg[1])) {
-       /* accept -<digit>, like traditional "head" */
-               revs->max_count = atoi(arg + 1);
+               /* accept -<digit>, like traditional "head" */
+               if (strtol_i(arg + 1, 10, &revs->max_count) < 0 ||
+                   revs->max_count < 0)
+                       die("'%s': not a non-negative integer", arg + 1);
                revs->no_walk = 0;
        } else if (!strcmp(arg, "-n")) {
                if (argc <= 1)
@@ -1822,7 +1884,7 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
        } else if (!strcmp(arg, "--pretty")) {
                revs->verbose_header = 1;
                revs->pretty_given = 1;
-               get_commit_format(arg+8, revs);
+               get_commit_format(NULL, revs);
        } else if (starts_with(arg, "--pretty=") || starts_with(arg, "--format=")) {
                /*
                 * Detached form ("--pretty X" as opposed to "--pretty=X")
@@ -1837,6 +1899,14 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
                revs->notes_opt.use_default_notes = 1;
        } else if (!strcmp(arg, "--show-signature")) {
                revs->show_signature = 1;
+       } else if (!strcmp(arg, "--show-linear-break") ||
+                  starts_with(arg, "--show-linear-break=")) {
+               if (starts_with(arg, "--show-linear-break="))
+                       revs->break_bar = xstrdup(arg + 20);
+               else
+                       revs->break_bar = "                    ..........";
+               revs->track_linear = 1;
+               revs->track_first_time = 1;
        } else if (starts_with(arg, "--show-notes=") ||
                   starts_with(arg, "--notes=")) {
                struct strbuf buf = STRBUF_INIT;
@@ -1960,6 +2030,8 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
                        unkv[(*unkc)++] = arg;
                return opts;
        }
+       if (revs->graph && revs->track_linear)
+               die("--show-linear-break and --graph are incompatible");
 
        return 1;
 }
@@ -2048,7 +2120,9 @@ static int handle_revision_pseudo_opt(const char *submodule,
                for_each_glob_ref_in(handle_one_ref, arg + 10, "refs/remotes/", &cb);
                clear_ref_exclusion(&revs->ref_excludes);
        } else if (!strcmp(arg, "--reflog")) {
-               handle_reflog(revs, *flags);
+               add_reflogs_to_pending(revs, *flags);
+       } else if (!strcmp(arg, "--indexed-objects")) {
+               add_index_objects_to_pending(revs, *flags);
        } else if (!strcmp(arg, "--not")) {
                *flags ^= UNINTERESTING | BOTTOM;
        } else if (!strcmp(arg, "--no-walk")) {
@@ -2643,26 +2717,26 @@ void reset_revision_walk(void)
 
 int prepare_revision_walk(struct rev_info *revs)
 {
-       int nr = revs->pending.nr;
-       struct object_array_entry *e, *list;
+       int i;
+       struct object_array old_pending;
        struct commit_list **next = &revs->commits;
 
-       e = list = revs->pending.objects;
+       memcpy(&old_pending, &revs->pending, sizeof(old_pending));
        revs->pending.nr = 0;
        revs->pending.alloc = 0;
        revs->pending.objects = NULL;
-       while (--nr >= 0) {
-               struct commit *commit = handle_commit(revs, e->item, e->name);
+       for (i = 0; i < old_pending.nr; i++) {
+               struct object_array_entry *e = old_pending.objects + i;
+               struct commit *commit = handle_commit(revs, e);
                if (commit) {
                        if (!(commit->object.flags & SEEN)) {
                                commit->object.flags |= SEEN;
                                next = commit_list_append(commit, next);
                        }
                }
-               e++;
        }
        if (!revs->leak_pending)
-               free(list);
+               object_array_clear(&old_pending);
 
        /* Signal whether we need per-parent treesame decoration */
        if (revs->simplify_merges ||
@@ -2778,7 +2852,7 @@ static int commit_match(struct commit *commit, struct rev_info *opt)
 {
        int retval;
        const char *encoding;
-       char *message;
+       const char *message;
        struct strbuf buf = STRBUF_INIT;
 
        if (!opt->grep_filter.pattern_list && !opt->grep_filter.header_list)
@@ -2820,14 +2894,21 @@ static int commit_match(struct commit *commit, struct rev_info *opt)
                format_display_notes(commit->object.sha1, &buf, encoding, 1);
        }
 
-       /* Find either in the original commit message, or in the temporary */
+       /*
+        * Find either in the original commit message, or in the temporary.
+        * Note that we cast away the constness of "message" here. It is
+        * const because it may come from the cached commit buffer. That's OK,
+        * because we know that it is modifiable heap memory, and that while
+        * grep_buffer may modify it for speed, it will restore any
+        * changes before returning.
+        */
        if (buf.len)
                retval = grep_buffer(&opt->grep_filter, buf.buf, buf.len);
        else
                retval = grep_buffer(&opt->grep_filter,
-                                    message, strlen(message));
+                                    (char *)message, strlen(message));
        strbuf_release(&buf);
-       logmsg_free(message, commit);
+       unuse_commit_buffer(commit, message);
        return retval;
 }
 
@@ -2902,6 +2983,27 @@ enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
        return action;
 }
 
+static void track_linear(struct rev_info *revs, struct commit *commit)
+{
+       if (revs->track_first_time) {
+               revs->linear = 1;
+               revs->track_first_time = 0;
+       } else {
+               struct commit_list *p;
+               for (p = revs->previous_parents; p; p = p->next)
+                       if (p->item == NULL || /* first commit */
+                           !hashcmp(p->item->object.sha1, commit->object.sha1))
+                               break;
+               revs->linear = p != NULL;
+       }
+       if (revs->reverse) {
+               if (revs->linear)
+                       commit->object.flags |= TRACK_LINEAR;
+       }
+       free_commit_list(revs->previous_parents);
+       revs->previous_parents = copy_commit_list(commit->parents);
+}
+
 static struct commit *get_revision_1(struct rev_info *revs)
 {
        if (!revs->commits)
@@ -2929,9 +3031,11 @@ static struct commit *get_revision_1(struct rev_info *revs)
                        if (revs->max_age != -1 &&
                            (commit->date < revs->max_age))
                                continue;
-                       if (add_parents_to_list(revs, commit, &revs->commits, NULL) < 0)
-                               die("Failed to traverse parents of commit %s",
-                                   sha1_to_hex(commit->object.sha1));
+                       if (add_parents_to_list(revs, commit, &revs->commits, NULL) < 0) {
+                               if (!revs->ignore_missing_links)
+                                       die("Failed to traverse parents of commit %s",
+                                               sha1_to_hex(commit->object.sha1));
+                       }
                }
 
                switch (simplify_commit(revs, commit)) {
@@ -2941,6 +3045,8 @@ static struct commit *get_revision_1(struct rev_info *revs)
                        die("Failed to simplify parents of commit %s",
                            sha1_to_hex(commit->object.sha1));
                default:
+                       if (revs->track_linear)
+                               track_linear(revs, commit);
                        return commit;
                }
        } while (revs->commits);
@@ -3107,14 +3213,23 @@ struct commit *get_revision(struct rev_info *revs)
                revs->reverse_output_stage = 1;
        }
 
-       if (revs->reverse_output_stage)
-               return pop_commit(&revs->commits);
+       if (revs->reverse_output_stage) {
+               c = pop_commit(&revs->commits);
+               if (revs->track_linear)
+                       revs->linear = !!(c && c->object.flags & TRACK_LINEAR);
+               return c;
+       }
 
        c = get_revision_internal(revs);
        if (c && revs->graph)
                graph_update(revs->graph, c);
-       if (!c)
+       if (!c) {
                free_saved_parents(revs);
+               if (revs->previous_parents) {
+                       free_commit_list(revs->previous_parents);
+                       revs->previous_parents = NULL;
+               }
+       }
        return c;
 }