fsck: detect trailing garbage in all object types
[gitweb.git] / diff-lib.c
index f35de0ffa0ec263acae7ac6211e3c2817987f760..52447466b5d16c4e8978795b0122e2182e83c5cb 100644 (file)
@@ -11,6 +11,7 @@
 #include "unpack-trees.h"
 #include "refs.h"
 #include "submodule.h"
+#include "dir.h"
 
 /*
  * diff-files
@@ -64,8 +65,9 @@ static int check_removed(const struct cache_entry *ce, struct stat *st)
  * commits, untracked content and/or modified content).
  */
 static int match_stat_with_submodule(struct diff_options *diffopt,
-                                     struct cache_entry *ce, struct stat *st,
-                                     unsigned ce_option, unsigned *dirty_submodule)
+                                    const struct cache_entry *ce,
+                                    struct stat *st, unsigned ce_option,
+                                    unsigned *dirty_submodule)
 {
        int changed = ce_match_stat(ce, st, ce_option);
        if (S_ISGITLINK(ce->ce_mode)) {
@@ -86,7 +88,6 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
 {
        int entries, i;
        int diff_unmerged_stage = revs->max_count;
-       int silent_on_removed = option & DIFF_SILENT_ON_REMOVED;
        unsigned ce_option = ((option & DIFF_RACY_IS_MODIFIED)
                              ? CE_MATCH_RACY_IS_DIRTY : 0);
 
@@ -96,16 +97,16 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                diff_unmerged_stage = 2;
        entries = active_nr;
        for (i = 0; i < entries; i++) {
-               struct stat st;
                unsigned int oldmode, newmode;
                struct cache_entry *ce = active_cache[i];
                int changed;
                unsigned dirty_submodule = 0;
+               const unsigned char *old_sha1, *new_sha1;
 
                if (diff_can_quit_early(&revs->diffopt))
                        break;
 
-               if (!ce_path_match(ce, &revs->prune_data))
+               if (!ce_path_match(ce, &revs->prune_data, NULL))
                        continue;
 
                if (ce_stage(ce)) {
@@ -114,6 +115,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                        unsigned int wt_mode = 0;
                        int num_compare_stages = 0;
                        size_t path_len;
+                       struct stat st;
 
                        path_len = ce_namelen(ce);
 
@@ -121,10 +123,9 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                        dpath->path = (char *) &(dpath->parent[5]);
 
                        dpath->next = NULL;
-                       dpath->len = path_len;
                        memcpy(dpath->path, ce->name, path_len);
                        dpath->path[path_len] = '\0';
-                       hashclr(dpath->sha1);
+                       oidclr(&dpath->oid);
                        memset(&(dpath->parent[0]), 0,
                               sizeof(struct combine_diff_parent)*5);
 
@@ -136,8 +137,6 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                                        perror(ce->name);
                                        continue;
                                }
-                               if (silent_on_removed)
-                                       continue;
                                wt_mode = 0;
                        }
                        dpath->mode = wt_mode;
@@ -156,7 +155,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                                if (2 <= stage) {
                                        int mode = nce->ce_mode;
                                        num_compare_stages++;
-                                       hashcpy(dpath->parent[stage-2].sha1, nce->sha1);
+                                       oidcpy(&dpath->parent[stage - 2].oid,
+                                              &nce->oid);
                                        dpath->parent[stage-2].mode = ce_mode_from_stat(nce, mode);
                                        dpath->parent[stage-2].status =
                                                DIFF_STATUS_MODIFIED;
@@ -197,31 +197,48 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                        continue;
 
                /* If CE_VALID is set, don't look at workdir for file removal */
-               changed = (ce->ce_flags & CE_VALID) ? 0 : check_removed(ce, &st);
-               if (changed) {
-                       if (changed < 0) {
-                               perror(ce->name);
+               if (ce->ce_flags & CE_VALID) {
+                       changed = 0;
+                       newmode = ce->ce_mode;
+               } else {
+                       struct stat st;
+
+                       changed = check_removed(ce, &st);
+                       if (changed) {
+                               if (changed < 0) {
+                                       perror(ce->name);
+                                       continue;
+                               }
+                               diff_addremove(&revs->diffopt, '-', ce->ce_mode,
+                                              ce->oid.hash,
+                                              !is_null_oid(&ce->oid),
+                                              ce->name, 0);
                                continue;
-                       }
-                       if (silent_on_removed)
+                       } else if (revs->diffopt.ita_invisible_in_index &&
+                                  ce_intent_to_add(ce)) {
+                               diff_addremove(&revs->diffopt, '+', ce->ce_mode,
+                                              EMPTY_BLOB_SHA1_BIN, 0,
+                                              ce->name, 0);
                                continue;
-                       diff_addremove(&revs->diffopt, '-', ce->ce_mode,
-                                      ce->sha1, !is_null_sha1(ce->sha1),
-                                      ce->name, 0);
-                       continue;
+                       }
+
+                       changed = match_stat_with_submodule(&revs->diffopt, ce, &st,
+                                                           ce_option, &dirty_submodule);
+                       newmode = ce_mode_from_stat(ce, st.st_mode);
                }
-               changed = match_stat_with_submodule(&revs->diffopt, ce, &st,
-                                                   ce_option, &dirty_submodule);
+
                if (!changed && !dirty_submodule) {
                        ce_mark_uptodate(ce);
                        if (!DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
                                continue;
                }
                oldmode = ce->ce_mode;
-               newmode = ce_mode_from_stat(ce, st.st_mode);
+               old_sha1 = ce->oid.hash;
+               new_sha1 = changed ? null_sha1 : ce->oid.hash;
                diff_change(&revs->diffopt, oldmode, newmode,
-                           ce->sha1, (changed ? null_sha1 : ce->sha1),
-                           !is_null_sha1(ce->sha1), (changed ? 0 : !is_null_sha1(ce->sha1)),
+                           old_sha1, new_sha1,
+                           !is_null_sha1(old_sha1),
+                           !is_null_sha1(new_sha1),
                            ce->name, 0, dirty_submodule);
 
        }
@@ -237,7 +254,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
 /* A file entry went away or appeared */
 static void diff_index_show_file(struct rev_info *revs,
                                 const char *prefix,
-                                struct cache_entry *ce,
+                                const struct cache_entry *ce,
                                 const unsigned char *sha1, int sha1_valid,
                                 unsigned int mode,
                                 unsigned dirty_submodule)
@@ -246,13 +263,13 @@ static void diff_index_show_file(struct rev_info *revs,
                       sha1, sha1_valid, ce->name, dirty_submodule);
 }
 
-static int get_stat_data(struct cache_entry *ce,
+static int get_stat_data(const struct cache_entry *ce,
                         const unsigned char **sha1p,
                         unsigned int *modep,
                         int cached, int match_missing,
                         unsigned *dirty_submodule, struct diff_options *diffopt)
 {
-       const unsigned char *sha1 = ce->sha1;
+       const unsigned char *sha1 = ce->oid.hash;
        unsigned int mode = ce->ce_mode;
 
        if (!cached && !ce_uptodate(ce)) {
@@ -283,7 +300,7 @@ static int get_stat_data(struct cache_entry *ce,
 }
 
 static void show_new_file(struct rev_info *revs,
-                         struct cache_entry *new,
+                         const struct cache_entry *new,
                          int cached, int match_missing)
 {
        const unsigned char *sha1;
@@ -302,8 +319,8 @@ static void show_new_file(struct rev_info *revs,
 }
 
 static int show_modified(struct rev_info *revs,
-                        struct cache_entry *old,
-                        struct cache_entry *new,
+                        const struct cache_entry *old,
+                        const struct cache_entry *new,
                         int report_missing,
                         int cached, int match_missing)
 {
@@ -315,42 +332,42 @@ static int show_modified(struct rev_info *revs,
                          &dirty_submodule, &revs->diffopt) < 0) {
                if (report_missing)
                        diff_index_show_file(revs, "-", old,
-                                            old->sha1, 1, old->ce_mode, 0);
+                                            old->oid.hash, 1, old->ce_mode,
+                                            0);
                return -1;
        }
 
        if (revs->combine_merges && !cached &&
-           (hashcmp(sha1, old->sha1) || hashcmp(old->sha1, new->sha1))) {
+           (hashcmp(sha1, old->oid.hash) || oidcmp(&old->oid, &new->oid))) {
                struct combine_diff_path *p;
                int pathlen = ce_namelen(new);
 
                p = xmalloc(combine_diff_path_size(2, pathlen));
                p->path = (char *) &p->parent[2];
                p->next = NULL;
-               p->len = pathlen;
                memcpy(p->path, new->name, pathlen);
                p->path[pathlen] = 0;
                p->mode = mode;
-               hashclr(p->sha1);
+               oidclr(&p->oid);
                memset(p->parent, 0, 2 * sizeof(struct combine_diff_parent));
                p->parent[0].status = DIFF_STATUS_MODIFIED;
                p->parent[0].mode = new->ce_mode;
-               hashcpy(p->parent[0].sha1, new->sha1);
+               oidcpy(&p->parent[0].oid, &new->oid);
                p->parent[1].status = DIFF_STATUS_MODIFIED;
                p->parent[1].mode = old->ce_mode;
-               hashcpy(p->parent[1].sha1, old->sha1);
+               oidcpy(&p->parent[1].oid, &old->oid);
                show_combined_diff(p, 2, revs->dense_combined_merges, revs);
                free(p);
                return 0;
        }
 
        oldmode = old->ce_mode;
-       if (mode == oldmode && !hashcmp(sha1, old->sha1) && !dirty_submodule &&
+       if (mode == oldmode && !hashcmp(sha1, old->oid.hash) && !dirty_submodule &&
            !DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
                return 0;
 
        diff_change(&revs->diffopt, oldmode, mode,
-                   old->sha1, sha1, 1, !is_null_sha1(sha1),
+                   old->oid.hash, sha1, 1, !is_null_sha1(sha1),
                    old->name, 0, dirty_submodule);
        return 0;
 }
@@ -362,12 +379,20 @@ static int show_modified(struct rev_info *revs,
  * give you the position and number of entries in the index).
  */
 static void do_oneway_diff(struct unpack_trees_options *o,
-       struct cache_entry *idx,
-       struct cache_entry *tree)
+                          const struct cache_entry *idx,
+                          const struct cache_entry *tree)
 {
        struct rev_info *revs = o->unpack_data;
        int match_missing, cached;
 
+       /* i-t-a entries do not actually exist in the index */
+       if (revs->diffopt.ita_invisible_in_index &&
+           idx && ce_intent_to_add(idx)) {
+               idx = NULL;
+               if (!tree)
+                       return; /* nothing to diff.. */
+       }
+
        /* if the entry is not checked out, don't examine work tree */
        cached = o->index_only ||
                (idx && ((idx->ce_flags & CE_VALID) || ce_skip_worktree(idx)));
@@ -384,7 +409,8 @@ static void do_oneway_diff(struct unpack_trees_options *o,
                struct diff_filepair *pair;
                pair = diff_unmerge(&revs->diffopt, idx->name);
                if (tree)
-                       fill_filespec(pair->one, tree->sha1, 1, tree->ce_mode);
+                       fill_filespec(pair->one, tree->oid.hash, 1,
+                                     tree->ce_mode);
                return;
        }
 
@@ -400,7 +426,8 @@ static void do_oneway_diff(struct unpack_trees_options *o,
         * Something removed from the tree?
         */
        if (!idx) {
-               diff_index_show_file(revs, "-", tree, tree->sha1, 1, tree->ce_mode, 0);
+               diff_index_show_file(revs, "-", tree, tree->oid.hash, 1,
+                                    tree->ce_mode, 0);
                return;
        }
 
@@ -423,10 +450,11 @@ static void do_oneway_diff(struct unpack_trees_options *o,
  * the fairly complex unpack_trees() semantic requirements, including
  * the skipping, the path matching, the type conflict cases etc.
  */
-static int oneway_diff(struct cache_entry **src, struct unpack_trees_options *o)
+static int oneway_diff(const struct cache_entry * const *src,
+                      struct unpack_trees_options *o)
 {
-       struct cache_entry *idx = src[0];
-       struct cache_entry *tree = src[1];
+       const struct cache_entry *idx = src[0];
+       const struct cache_entry *tree = src[1];
        struct rev_info *revs = o->unpack_data;
 
        /*
@@ -438,7 +466,7 @@ static int oneway_diff(struct cache_entry **src, struct unpack_trees_options *o)
        if (tree == o->df_conflict_entry)
                tree = NULL;
 
-       if (ce_path_match(idx ? idx : tree, &revs->prune_data)) {
+       if (ce_path_match(idx ? idx : tree, &revs->prune_data, NULL)) {
                do_oneway_diff(o, idx, tree);
                if (diff_can_quit_early(&revs->diffopt)) {
                        o->exiting_early = 1;
@@ -474,7 +502,6 @@ static int diff_cache(struct rev_info *revs,
        opts.dst_index = NULL;
        opts.pathspec = &revs->diffopt.pathspec;
        opts.pathspec->recursive = 1;
-       opts.pathspec->max_depth = -1;
 
        init_tree_desc(&t, tree->buffer, tree->size);
        return unpack_trees(1, &t, &opts);
@@ -485,7 +512,7 @@ int run_diff_index(struct rev_info *revs, int cached)
        struct object_array_entry *ent;
 
        ent = revs->pending.objects;
-       if (diff_cache(revs, ent->item->sha1, ent->name, cached))
+       if (diff_cache(revs, ent->item->oid.hash, ent->name, cached))
                exit(128);
 
        diff_set_mnemonic_prefix(&revs->diffopt, "c/", cached ? "i/" : "w/");
@@ -500,7 +527,7 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
        struct rev_info revs;
 
        init_revisions(&revs, NULL);
-       init_pathspec(&revs.prune_data, opt->pathspec.raw);
+       copy_pathspec(&revs.prune_data, &opt->pathspec);
        revs.diffopt = *opt;
 
        if (diff_cache(&revs, tree_sha1, NULL, 1))
@@ -508,7 +535,8 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
        return 0;
 }
 
-int index_differs_from(const char *def, int diff_flags)
+int index_differs_from(const char *def, int diff_flags,
+                      int ita_invisible_in_index)
 {
        struct rev_info rev;
        struct setup_revision_opt opt;
@@ -520,6 +548,7 @@ int index_differs_from(const char *def, int diff_flags)
        DIFF_OPT_SET(&rev.diffopt, QUICK);
        DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS);
        rev.diffopt.flags |= diff_flags;
+       rev.diffopt.ita_invisible_in_index = ita_invisible_in_index;
        run_diff_index(&rev, 1);
        if (rev.pending.alloc)
                free(rev.pending.objects);