diff: do not use null sha1 as a sentinel value

The diff code represents paths using the diff_filespec
struct. This struct has a sha1 to represent the sha1 of the
content at that path, as well as a sha1_valid member which
indicates whether its sha1 field is actually useful. If
sha1_valid is not true, then the filespec represents a
working tree file (e.g., for the no-index case, or for when
the index is not up-to-date).

The diff_filespec is only used internally, though. At the
interfaces to the diff subsystem, callers feed the sha1
directly, and we create a diff_filespec from it. It's at
that point that we look at the sha1 and decide whether it is
valid or not; callers may pass the null sha1 as a sentinel
value to indicate that it is not.

We should not typically see the null sha1 coming from any
other source (e.g., in the index itself, or from a tree).
However, a corrupt tree might have a null sha1, which would
cause "diff --patch" to accidentally diff the working tree
version of a file instead of treating it as a blob.

This patch extends the edges of the diff interface to accept
a "sha1_valid" flag whenever we accept a sha1, and to use
that flag when creating a filespec. In some cases, this
means passing the flag through several layers, making the
code change larger than would be desirable.

One alternative would be to simply die() upon seeing
corrupted trees with null sha1s. However, this fix more
directly addresses the problem (while bogus sha1s in a tree
are probably a bad thing, it is really the sentinel
confusion sending us down the wrong code path that is what
makes it devastating). And it means that git is more capable
of examining and debugging these corrupted trees. For
example, you can still "diff --raw" such a tree to find out
when the bogus entry was introduced; you just cannot do a
"--patch" diff (just as you could not with any other
corrupted tree, as we do not have any content to diff).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin.h b/builtin.h
index 857b9c8aa85fff5764b528485a880cd9dfa95b17..47f540f37f908c7539bcdbde5dd7550af8c92e72 100644 (file)
--- a/builtin.h
+++ b/builtin.h
@@ -42,7 +42,7 @@ void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c);
 
 extern int check_pager_config(const char *cmd);
 
-extern int textconv_object(const char *path, unsigned mode, const unsigned char *sha1, char **buf, unsigned long *buf_size);
+extern int textconv_object(const char *path, unsigned mode, const unsigned char *sha1, int sha1_valid, char **buf, unsigned long *buf_size);
 
 extern int cmd_add(int argc, const char **argv, const char *prefix);
 extern int cmd_annotate(int argc, const char **argv, const char *prefix);

diff --git a/builtin/blame.c b/builtin/blame.c
index 5a67c202f06abeaa90a7547d78b536f7f2b9db24..fac0e93e67eeee8bef709670da1cbfe77055137d 100644 (file)
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -96,6 +96,7 @@ struct origin {
 int textconv_object(const char *path,
                    unsigned mode,
                    const unsigned char *sha1,
+                   int sha1_valid,
                    char **buf,
                    unsigned long *buf_size)
 {
@@ -103,7 +104,7 @@ int textconv_object(const char *path,
        struct userdiff_driver *textconv;
 
        df = alloc_filespec(path);
-       fill_filespec(df, sha1, mode);
+       fill_filespec(df, sha1, sha1_valid, mode);
        textconv = get_textconv(df);
        if (!textconv) {
                free_filespec(df);
@@ -128,7 +129,7 @@ static void fill_origin_blob(struct diff_options *opt,
 
                num_read_blob++;
                if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) &&
-                   textconv_object(o->path, o->mode, o->blob_sha1, &file->ptr, &file_size))
+                   textconv_object(o->path, o->mode, o->blob_sha1, 1, &file->ptr, &file_size))
                        ;
                else
                        file->ptr = read_sha1_file(o->blob_sha1, &type, &file_size);
@@ -2114,7 +2115,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
                switch (st.st_mode & S_IFMT) {
                case S_IFREG:
                        if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) &&
-                           textconv_object(read_from, mode, null_sha1, &buf_ptr, &buf_len))
+                           textconv_object(read_from, mode, null_sha1, 0, &buf_ptr, &buf_len))
                                strbuf_attach(&buf, buf_ptr, buf_len, buf_len + 1);
                        else if (strbuf_read_file(&buf, read_from, st.st_size) != st.st_size)
                                die_errno("cannot open or read '%s'", read_from);
@@ -2506,7 +2507,7 @@ parse_done:
                        die("no such path %s in %s", path, final_commit_name);
 
                if (DIFF_OPT_TST(&sb.revs->diffopt, ALLOW_TEXTCONV) &&
-                   textconv_object(path, o->mode, o->blob_sha1, (char **) &sb.final_buf,
+                   textconv_object(path, o->mode, o->blob_sha1, 1, (char **) &sb.final_buf,
                                    &sb.final_buf_size))
                        ;
                else

diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 07bd984084fbbfbb826ef5b784fc68069675e73c..72205faeafcaf91bc75a1d79bd72eecd4e3a6edb 100644 (file)
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -143,7 +143,7 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
                        die("git cat-file --textconv %s: <object> must be <sha1:path>",
                            obj_name);
 
-               if (!textconv_object(obj_context.path, obj_context.mode, sha1, &buf, &size))
+               if (!textconv_object(obj_context.path, obj_context.mode, sha1, 1, &buf, &size))
                        die("git cat-file --textconv: unable to run textconv on %s",
                            obj_name);
                break;

diff --git a/builtin/diff.c b/builtin/diff.c
index 387afa75680d813bccd5493e5946600c08679890..ac2b1cc63f8dcc655c353032f94b06c7c273f7a2 100644 (file)
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -29,6 +29,8 @@ static void stuff_change(struct diff_options *opt,
                         unsigned old_mode, unsigned new_mode,
                         const unsigned char *old_sha1,
                         const unsigned char *new_sha1,
+                        int old_sha1_valid,
+                        int new_sha1_valid,
                         const char *old_name,
                         const char *new_name)
 {
@@ -54,8 +56,8 @@ static void stuff_change(struct diff_options *opt,
 
        one = alloc_filespec(old_name);
        two = alloc_filespec(new_name);
-       fill_filespec(one, old_sha1, old_mode);
-       fill_filespec(two, new_sha1, new_mode);
+       fill_filespec(one, old_sha1, old_sha1_valid, old_mode);
+       fill_filespec(two, new_sha1, new_sha1_valid, new_mode);
 
        diff_queue(&diff_queued_diff, one, two);
 }
@@ -84,6 +86,7 @@ static int builtin_diff_b_f(struct rev_info *revs,
        stuff_change(&revs->diffopt,
                     blob[0].mode, canon_mode(st.st_mode),
                     blob[0].sha1, null_sha1,
+                    1, 0,
                     path, path);
        diffcore_std(&revs->diffopt);
        diff_flush(&revs->diffopt);
@@ -108,6 +111,7 @@ static int builtin_diff_blobs(struct rev_info *revs,
        stuff_change(&revs->diffopt,
                     blob[0].mode, blob[1].mode,
                     blob[0].sha1, blob[1].sha1,
+                    1, 1,
                     blob[0].name, blob[1].name);
        diffcore_std(&revs->diffopt);
        diff_flush(&revs->diffopt);

diff --git a/combine-diff.c b/combine-diff.c
index a2e8dcf8553ff15d7cfed8f8ec4735185ec162bb..e9abdbd0b9b65c4ff3b36f0bd1cceeb92edd580f 100644 (file)
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -111,7 +111,7 @@ static char *grab_blob(const unsigned char *sha1, unsigned int mode,
                return xcalloc(1, 1);
        } else if (textconv) {
                struct diff_filespec *df = alloc_filespec(path);
-               fill_filespec(df, sha1, mode);
+               fill_filespec(df, sha1, 1, mode);
                *size = fill_textconv(textconv, df, &blob);
                free_filespec(df);
        } else {
@@ -823,7 +823,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                                                   &result_size, NULL, NULL);
                } else if (textconv) {
                        struct diff_filespec *df = alloc_filespec(elem->path);
-                       fill_filespec(df, null_sha1, st.st_mode);
+                       fill_filespec(df, null_sha1, 0, st.st_mode);
                        result_size = fill_textconv(textconv, df, &result);
                        free_filespec(df);
                } else if (0 <= (fd = open(elem->path, O_RDONLY))) {

diff --git a/diff-lib.c b/diff-lib.c
index fc0dff31b58c8bd6668de5c6396a93b31cc5729d..f35de0ffa0ec263acae7ac6211e3c2817987f760 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -206,7 +206,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                        if (silent_on_removed)
                                continue;
                        diff_addremove(&revs->diffopt, '-', ce->ce_mode,
-                                      ce->sha1, ce->name, 0);
+                                      ce->sha1, !is_null_sha1(ce->sha1),
+                                      ce->name, 0);
                        continue;
                }
                changed = match_stat_with_submodule(&revs->diffopt, ce, &st,
@@ -220,6 +221,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                newmode = ce_mode_from_stat(ce, st.st_mode);
                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)),
                            ce->name, 0, dirty_submodule);
 
        }
@@ -236,11 +238,12 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
 static void diff_index_show_file(struct rev_info *revs,
                                 const char *prefix,
                                 struct cache_entry *ce,
-                                const unsigned char *sha1, unsigned int mode,
+                                const unsigned char *sha1, int sha1_valid,
+                                unsigned int mode,
                                 unsigned dirty_submodule)
 {
        diff_addremove(&revs->diffopt, prefix[0], mode,
-                      sha1, ce->name, dirty_submodule);
+                      sha1, sha1_valid, ce->name, dirty_submodule);
 }
 
 static int get_stat_data(struct cache_entry *ce,
@@ -295,7 +298,7 @@ static void show_new_file(struct rev_info *revs,
            &dirty_submodule, &revs->diffopt) < 0)
                return;
 
-       diff_index_show_file(revs, "+", new, sha1, mode, dirty_submodule);
+       diff_index_show_file(revs, "+", new, sha1, !is_null_sha1(sha1), mode, dirty_submodule);
 }
 
 static int show_modified(struct rev_info *revs,
@@ -312,7 +315,7 @@ static int show_modified(struct rev_info *revs,
                          &dirty_submodule, &revs->diffopt) < 0) {
                if (report_missing)
                        diff_index_show_file(revs, "-", old,
-                                            old->sha1, old->ce_mode, 0);
+                                            old->sha1, 1, old->ce_mode, 0);
                return -1;
        }
 
@@ -347,7 +350,8 @@ static int show_modified(struct rev_info *revs,
                return 0;
 
        diff_change(&revs->diffopt, oldmode, mode,
-                   old->sha1, sha1, old->name, 0, dirty_submodule);
+                   old->sha1, sha1, 1, !is_null_sha1(sha1),
+                   old->name, 0, dirty_submodule);
        return 0;
 }
 
@@ -380,7 +384,7 @@ 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, tree->ce_mode);
+                       fill_filespec(pair->one, tree->sha1, 1, tree->ce_mode);
                return;
        }
 
@@ -396,7 +400,7 @@ 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, tree->ce_mode, 0);
+               diff_index_show_file(revs, "-", tree, tree->sha1, 1, tree->ce_mode, 0);
                return;
        }
 

diff --git a/diff-no-index.c b/diff-no-index.c
index 3a36144687ae2f5bf7bb3afc914ddbada8d5ff93..6568eea6f4a465a40f522584a6fcaf92841f16e7 100644 (file)
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -141,8 +141,8 @@ static int queue_diff(struct diff_options *o,
                        name2 = "/dev/null";
                d1 = alloc_filespec(name1);
                d2 = alloc_filespec(name2);
-               fill_filespec(d1, null_sha1, mode1);
-               fill_filespec(d2, null_sha1, mode2);
+               fill_filespec(d1, null_sha1, 0, mode1);
+               fill_filespec(d2, null_sha1, 0, mode2);
 
                diff_queue(&diff_queued_diff, d1, d2);
                return 0;

diff --git a/diff.c b/diff.c
index 5388ded2140d9d4268fbda702603902bf4530981..8933dd19969124e33a6433aaa54d3ea54e573a33 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -2443,12 +2443,12 @@ void free_filespec(struct diff_filespec *spec)
 }
 
 void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1,
-                  unsigned short mode)
+                  int sha1_valid, unsigned short mode)
 {
        if (mode) {
                spec->mode = canon_mode(mode);
                hashcpy(spec->sha1, sha1);
-               spec->sha1_valid = !is_null_sha1(sha1);
+               spec->sha1_valid = sha1_valid;
        }
 }
 
@@ -4589,6 +4589,7 @@ static int is_submodule_ignored(const char *path, struct diff_options *options)
 void diff_addremove(struct diff_options *options,
                    int addremove, unsigned mode,
                    const unsigned char *sha1,
+                   int sha1_valid,
                    const char *concatpath, unsigned dirty_submodule)
 {
        struct diff_filespec *one, *two;
@@ -4620,9 +4621,9 @@ void diff_addremove(struct diff_options *options,
        two = alloc_filespec(concatpath);
 
        if (addremove != '+')
-               fill_filespec(one, sha1, mode);
+               fill_filespec(one, sha1, sha1_valid, mode);
        if (addremove != '-') {
-               fill_filespec(two, sha1, mode);
+               fill_filespec(two, sha1, sha1_valid, mode);
                two->dirty_submodule = dirty_submodule;
        }
 
@@ -4635,6 +4636,7 @@ void diff_change(struct diff_options *options,
                 unsigned old_mode, unsigned new_mode,
                 const unsigned char *old_sha1,
                 const unsigned char *new_sha1,
+                int old_sha1_valid, int new_sha1_valid,
                 const char *concatpath,
                 unsigned old_dirty_submodule, unsigned new_dirty_submodule)
 {
@@ -4649,6 +4651,8 @@ void diff_change(struct diff_options *options,
                const unsigned char *tmp_c;
                tmp = old_mode; old_mode = new_mode; new_mode = tmp;
                tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c;
+               tmp = old_sha1_valid; old_sha1_valid = new_sha1_valid;
+                       new_sha1_valid = tmp;
                tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule;
                        new_dirty_submodule = tmp;
        }
@@ -4659,8 +4663,8 @@ void diff_change(struct diff_options *options,
 
        one = alloc_filespec(concatpath);
        two = alloc_filespec(concatpath);
-       fill_filespec(one, old_sha1, old_mode);
-       fill_filespec(two, new_sha1, new_mode);
+       fill_filespec(one, old_sha1, old_sha1_valid, old_mode);
+       fill_filespec(two, new_sha1, new_sha1_valid, new_mode);
        one->dirty_submodule = old_dirty_submodule;
        two->dirty_submodule = new_dirty_submodule;
 

diff --git a/diff.h b/diff.h
index 7af5f1e2a7af3fde64ac945f8b2a9ed88829895a..b5ba1402aa5d1ce65de56d024764564bbd473413 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -19,12 +19,14 @@ typedef void (*change_fn_t)(struct diff_options *options,
                 unsigned old_mode, unsigned new_mode,
                 const unsigned char *old_sha1,
                 const unsigned char *new_sha1,
+                int old_sha1_valid, int new_sha1_valid,
                 const char *fullpath,
                 unsigned old_dirty_submodule, unsigned new_dirty_submodule);
 
 typedef void (*add_remove_fn_t)(struct diff_options *options,
                    int addremove, unsigned mode,
                    const unsigned char *sha1,
+                   int sha1_valid,
                    const char *fullpath, unsigned dirty_submodule);
 
 typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
@@ -209,12 +211,15 @@ extern void diff_addremove(struct diff_options *,
                           int addremove,
                           unsigned mode,
                           const unsigned char *sha1,
+                          int sha1_valid,
                           const char *fullpath, unsigned dirty_submodule);
 
 extern void diff_change(struct diff_options *,
                        unsigned mode1, unsigned mode2,
                        const unsigned char *sha1,
                        const unsigned char *sha2,
+                       int sha1_valid,
+                       int sha2_valid,
                        const char *fullpath,
                        unsigned dirty_submodule1, unsigned dirty_submodule2);
 

diff --git a/diffcore-rename.c b/diffcore-rename.c
index f639601c762ebbd12374fa739d1d63efaf265e2a..e6f9be64cfed2984f1ebd0364ae1e9bfabc35de7 100644 (file)
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -48,7 +48,7 @@ static struct diff_rename_dst *locate_rename_dst(struct diff_filespec *two,
                memmove(rename_dst + first + 1, rename_dst + first,
                        (rename_dst_nr - first - 1) * sizeof(*rename_dst));
        rename_dst[first].two = alloc_filespec(two->path);
-       fill_filespec(rename_dst[first].two, two->sha1, two->mode);
+       fill_filespec(rename_dst[first].two, two->sha1, two->sha1_valid, two->mode);
        rename_dst[first].pair = NULL;
        return &(rename_dst[first]);
 }

diff --git a/diffcore.h b/diffcore.h
index 8f32b824cdc1bac1f094d743f3bee9f32890edca..c964ec114a56cb0e42f4164bdabf15e9e15a4ecb 100644 (file)
--- a/diffcore.h
+++ b/diffcore.h
@@ -54,7 +54,7 @@ struct diff_filespec {
 extern struct diff_filespec *alloc_filespec(const char *);
 extern void free_filespec(struct diff_filespec *);
 extern void fill_filespec(struct diff_filespec *, const unsigned char *,
-                         unsigned short);
+                         int, unsigned short);
 
 extern int diff_populate_filespec(struct diff_filespec *, int);
 extern void diff_free_filespec_data(struct diff_filespec *);

diff --git a/revision.c b/revision.c
index 18be62b3169095b908cb521cf9be211a9339029d..21ef729cfaa4e675bae3c73a7a09d1cfc21aad05 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -332,6 +332,7 @@ static int tree_difference = REV_TREE_SAME;
 static void file_add_remove(struct diff_options *options,
                    int addremove, unsigned mode,
                    const unsigned char *sha1,
+                   int sha1_valid,
                    const char *fullpath, unsigned dirty_submodule)
 {
        int diff = addremove == '+' ? REV_TREE_NEW : REV_TREE_OLD;
@@ -345,6 +346,7 @@ static void file_change(struct diff_options *options,
                 unsigned old_mode, unsigned new_mode,
                 const unsigned char *old_sha1,
                 const unsigned char *new_sha1,
+                int old_sha1_valid, int new_sha1_valid,
                 const char *fullpath,
                 unsigned old_dirty_submodule, unsigned new_dirty_submodule)
 {

diff --git a/t/t4054-diff-bogus-tree.sh b/t/t4054-diff-bogus-tree.sh
new file mode 100755 (executable)
index 0000000..0843c87
--- /dev/null
+++ b/t/t4054-diff-bogus-tree.sh
@@ -0,0 +1,83 @@
+#!/bin/sh
+
+test_description='test diff with a bogus tree containing the null sha1'
+. ./test-lib.sh
+
+empty_tree=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+
+test_expect_success 'create bogus tree' '
+       bogus_tree=$(
+               printf "100644 fooQQQQQQQQQQQQQQQQQQQQQ" |
+               q_to_nul |
+               git hash-object -w --stdin -t tree
+       )
+'
+
+test_expect_success 'create tree with matching file' '
+       echo bar >foo &&
+       git add foo &&
+       good_tree=$(git write-tree)
+       blob=$(git rev-parse :foo)
+'
+
+test_expect_success 'raw diff shows null sha1 (addition)' '
+       echo ":000000 100644 $_z40 $_z40 A      foo" >expect &&
+       git diff-tree $empty_tree $bogus_tree >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (removal)' '
+       echo ":100644 000000 $_z40 $_z40 D      foo" >expect &&
+       git diff-tree $bogus_tree $empty_tree >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (modification)' '
+       echo ":100644 100644 $blob $_z40 M      foo" >expect &&
+       git diff-tree $good_tree $bogus_tree >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (other direction)' '
+       echo ":100644 100644 $_z40 $blob M      foo" >expect &&
+       git diff-tree $bogus_tree $good_tree >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (reverse)' '
+       echo ":100644 100644 $_z40 $blob M      foo" >expect &&
+       git diff-tree -R $good_tree $bogus_tree >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'raw diff shows null sha1 (index)' '
+       echo ":100644 100644 $_z40 $blob M      foo" >expect &&
+       git diff-index $bogus_tree >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'patch fails due to bogus sha1 (addition)' '
+       test_must_fail git diff-tree -p $empty_tree $bogus_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (removal)' '
+       test_must_fail git diff-tree -p $bogus_tree $empty_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (modification)' '
+       test_must_fail git diff-tree -p $good_tree $bogus_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (other direction)' '
+       test_must_fail git diff-tree -p $bogus_tree $good_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (reverse)' '
+       test_must_fail git diff-tree -R -p $good_tree $bogus_tree
+'
+
+test_expect_success 'patch fails due to bogus sha1 (index)' '
+       test_must_fail git diff-index -p $bogus_tree
+'
+
+test_done

diff --git a/tree-diff.c b/tree-diff.c
index 28ad6db9ffa854c3ef9185ba85108e95edc44d51..7e5483366e611df02238656a10749f9070ce41c6 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -49,12 +49,12 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2,
        if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode1)) {
                if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE)) {
                        opt->change(opt, mode1, mode2,
-                                   sha1, sha2, base->buf, 0, 0);
+                                   sha1, sha2, 1, 1, base->buf, 0, 0);
                }
                strbuf_addch(base, '/');
                diff_tree_sha1(sha1, sha2, base->buf, opt);
        } else {
-               opt->change(opt, mode1, mode2, sha1, sha2, base->buf, 0, 0);
+               opt->change(opt, mode1, mode2, sha1, sha2, 1, 1, base->buf, 0, 0);
        }
        strbuf_setlen(base, old_baselen);
        return 0;
@@ -100,7 +100,7 @@ static void show_entry(struct diff_options *opt, const char *prefix,
                        die("corrupt tree sha %s", sha1_to_hex(sha1));
 
                if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE))
-                       opt->add_remove(opt, *prefix, mode, sha1, base->buf, 0);
+                       opt->add_remove(opt, *prefix, mode, sha1, 1, base->buf, 0);
 
                strbuf_addch(base, '/');
 
@@ -108,7 +108,7 @@ static void show_entry(struct diff_options *opt, const char *prefix,
                show_tree(opt, prefix, &inner, base);
                free(tree);
        } else
-               opt->add_remove(opt, prefix[0], mode, sha1, base->buf, 0);
+               opt->add_remove(opt, prefix[0], mode, sha1, 1, base->buf, 0);
 
        strbuf_setlen(base, old_baselen);
 }