docs/diff-options: clarify scope of diff-filter types

diff --git a/diff-lib.c b/diff-lib.c
index bc49c708c1854a0f67c25e4fd2b77a9ad50ff511..52447466b5d16c4e8978795b0122e2182e83c5cb 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -155,7 +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].oid.hash, 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;
@@ -209,7 +210,14 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                                        continue;
                                }
                                diff_addremove(&revs->diffopt, '-', ce->ce_mode,
-                                              ce->sha1, !is_null_sha1(ce->sha1),
+                                              ce->oid.hash,
+                                              !is_null_oid(&ce->oid),
+                                              ce->name, 0);
+                               continue;
+                       } 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;
                        }
@@ -225,8 +233,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                                continue;
                }
                oldmode = ce->ce_mode;
-               old_sha1 = ce->sha1;
-               new_sha1 = changed ? null_sha1 : ce->sha1;
+               old_sha1 = ce->oid.hash;
+               new_sha1 = changed ? null_sha1 : ce->oid.hash;
                diff_change(&revs->diffopt, oldmode, newmode,
                            old_sha1, new_sha1,
                            !is_null_sha1(old_sha1),
@@ -261,7 +269,7 @@ static int get_stat_data(const struct cache_entry *ce,
                         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)) {
@@ -324,12 +332,13 @@ 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);
 
@@ -343,22 +352,22 @@ static int show_modified(struct rev_info *revs,
                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].oid.hash, 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].oid.hash, 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;
 }
@@ -376,6 +385,14 @@ static void do_oneway_diff(struct unpack_trees_options *o,
        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)));
@@ -392,7 +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;
        }
 
@@ -408,7 +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;
        }
 
@@ -516,7 +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;
@@ -528,6 +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);