Update tests not to assume that generated packfiles are writable.

diff --git a/diff.c b/diff.c
index d8f9242ea8fe2ee92884623939a85b6587a3ad9d..f516664968a6cb448611c24489254cbb2c9947ff 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -8,6 +8,7 @@
 #include "delta.h"
 #include "xdiff-interface.h"
 #include "color.h"
+#include "attr.h"
 
 #ifdef NO_FAST_WORKING_DIRECTORY
 #define FAST_WORKING_DIRECTORY 0
@@ -811,7 +812,12 @@ static void show_stats(struct diffstat_t* data, struct diff_options *options)
 
                if (data->files[i]->is_binary) {
                        show_name(prefix, name, len, reset, set);
-                       printf("  Bin\n");
+                       printf("  Bin ");
+                       printf("%s%d%s", del_c, deleted, reset);
+                       printf(" -> ");
+                       printf("%s%d%s", add_c, added, reset);
+                       printf(" bytes");
+                       printf("\n");
                        goto free_diffstat_file;
                }
                else if (data->files[i]->is_unmerged) {
@@ -1046,13 +1052,44 @@ static void emit_binary_diff(mmfile_t *one, mmfile_t *two)
        emit_binary_diff_body(two, one);
 }
 
+static void setup_diff_attr_check(struct git_attr_check *check)
+{
+       static struct git_attr *attr_diff;
+
+       if (!attr_diff)
+               attr_diff = git_attr("diff", 4);
+       check->attr = attr_diff;
+}
+
 #define FIRST_FEW_BYTES 8000
-static int mmfile_is_binary(mmfile_t *mf)
+static int file_is_binary(struct diff_filespec *one)
 {
-       long sz = mf->size;
+       unsigned long sz;
+       struct git_attr_check attr_diff_check;
+
+       setup_diff_attr_check(&attr_diff_check);
+       if (!git_checkattr(one->path, 1, &attr_diff_check)) {
+               const char *value = attr_diff_check.value;
+               if (ATTR_TRUE(value))
+                       return 0;
+               else if (ATTR_FALSE(value))
+                       return 1;
+               else if (ATTR_UNSET(value))
+                       ;
+               else
+                       die("unknown value %s given to 'diff' attribute",
+                           value);
+       }
+
+       if (!one->data) {
+               if (!DIFF_FILE_VALID(one))
+                       return 0;
+               diff_populate_filespec(one, 0);
+       }
+       sz = one->size;
        if (FIRST_FEW_BYTES < sz)
                sz = FIRST_FEW_BYTES;
-       return !!memchr(mf->ptr, 0, sz);
+       return !!memchr(one->data, 0, sz);
 }
 
 static void builtin_diff(const char *name_a,
@@ -1109,7 +1146,7 @@ static void builtin_diff(const char *name_a,
        if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
                die("unable to read files to diff");
 
-       if (!o->text && (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))) {
+       if (!o->text && (file_is_binary(one) || file_is_binary(two))) {
                /* Quite common confusing case */
                if (mf1.size == mf2.size &&
                    !memcmp(mf1.ptr, mf2.ptr, mf1.size))
@@ -1185,9 +1222,11 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
        if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
                die("unable to read files to diff");
 
-       if (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))
+       if (file_is_binary(one) || file_is_binary(two)) {
                data->is_binary = 1;
-       else {
+               data->added = mf2.size;
+               data->deleted = mf1.size;
+       } else {
                /* Crazy xdl interfaces.. */
                xpparam_t xpp;
                xdemitconf_t xecfg;
@@ -1221,7 +1260,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
        if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
                die("unable to read files to diff");
 
-       if (mmfile_is_binary(&mf2))
+       if (file_is_binary(two))
                return;
        else {
                /* Crazy xdl interfaces.. */
@@ -1390,6 +1429,22 @@ static int populate_from_stdin(struct diff_filespec *s)
        return 0;
 }
 
+static int diff_populate_gitlink(struct diff_filespec *s, int size_only)
+{
+       int len;
+       char *data = xmalloc(100);
+       len = snprintf(data, 100,
+               "Subproject commit %s\n", sha1_to_hex(s->sha1));
+       s->data = data;
+       s->size = len;
+       s->should_free = 1;
+       if (size_only) {
+               s->data = NULL;
+               free(data);
+       }
+       return 0;
+}
+
 /*
  * While doing rename detection and pickaxe operation, we may need to
  * grab the data for the blob (or file) for our own in-core comparison.
@@ -1408,6 +1463,10 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only)
 
        if (s->data)
                return err;
+
+       if (S_ISDIRLNK(s->mode))
+               return diff_populate_gitlink(s, size_only);
+
        if (!s->sha1_valid ||
            reuse_worktree_file(s->path, s->sha1, 0)) {
                struct stat st;
@@ -1454,9 +1513,9 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only)
                /*
                 * Convert from working tree format to canonical git format
                 */
-               buf = s->data;
                size = s->size;
-               if (convert_to_git(s->path, &buf, &size)) {
+               buf = convert_to_git(s->path, s->data, &size);
+               if (buf) {
                        munmap(s->data, s->size);
                        s->should_munmap = 0;
                        s->data = buf;
@@ -1798,8 +1857,8 @@ static void run_diff(struct diff_filepair *p, struct diff_options *o)
 
                if (o->binary) {
                        mmfile_t mf;
-                       if ((!fill_mmfile(&mf, one) && mmfile_is_binary(&mf)) ||
-                           (!fill_mmfile(&mf, two) && mmfile_is_binary(&mf)))
+                       if ((!fill_mmfile(&mf, one) && file_is_binary(one)) ||
+                           (!fill_mmfile(&mf, two) && file_is_binary(two)))
                                abbrev = 40;
                }
                len += snprintf(msg + len, sizeof(msg) - len,
@@ -2694,7 +2753,7 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
                        return error("unable to read files to diff");
 
                /* Maybe hash p->two? into the patch id? */
-               if (mmfile_is_binary(&mf2))
+               if (file_is_binary(p->two))
                        continue;
 
                len1 = remove_space(p->one->path, strlen(p->one->path));