Merge branch 'jc/diff-no-index-d-f' into maint-2.3
The usual "git diff" when seeing a file turning into a directory
showed a patchset to remove the file and create all files in the
directory, but "git diff --no-index" simply refused to work. Also,
when asked to compare a file and a directory, imitate POSIX "diff"
and compare the file with the file with the same name in the
directory, instead of refusing to run.
* jc/diff-no-index-d-f:
diff-no-index: align D/F handling with that of normal Git
diff-no-index: DWIM "diff D F" into "diff D/F F"
diff --git a/diff-no-index.c b/diff-no-index.c
index 265709b..0320605 100644
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -97,8 +97,27 @@
if (get_mode(name1, &mode1) || get_mode(name2, &mode2))
return -1;
- if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2))
- return error("file/directory conflict: %s, %s", name1, name2);
+ if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2)) {
+ struct diff_filespec *d1, *d2;
+
+ if (S_ISDIR(mode1)) {
+ /* 2 is file that is created */
+ d1 = noindex_filespec(NULL, 0);
+ d2 = noindex_filespec(name2, mode2);
+ name2 = NULL;
+ mode2 = 0;
+ } else {
+ /* 1 is file that is deleted */
+ d1 = noindex_filespec(name1, mode1);
+ d2 = noindex_filespec(NULL, 0);
+ name1 = NULL;
+ mode1 = 0;
+ }
+ /* emit that file */
+ diff_queue(&diff_queued_diff, d1, d2);
+
+ /* and then let the entire directory be created or deleted */
+ }
if (S_ISDIR(mode1) || S_ISDIR(mode2)) {
struct strbuf buffer1 = STRBUF_INIT;
@@ -182,12 +201,50 @@
}
}
+/* append basename of F to D */
+static void append_basename(struct strbuf *path, const char *dir, const char *file)
+{
+ const char *tail = strrchr(file, '/');
+
+ strbuf_addstr(path, dir);
+ while (path->len && path->buf[path->len - 1] == '/')
+ path->len--;
+ strbuf_addch(path, '/');
+ strbuf_addstr(path, tail ? tail + 1 : file);
+}
+
+/*
+ * DWIM "diff D F" into "diff D/F F" and "diff F D" into "diff F D/F"
+ * Note that we append the basename of F to D/, so "diff a/b/file D"
+ * becomes "diff a/b/file D/file", not "diff a/b/file D/a/b/file".
+ */
+static void fixup_paths(const char **path, struct strbuf *replacement)
+{
+ unsigned int isdir0, isdir1;
+
+ if (path[0] == file_from_standard_input ||
+ path[1] == file_from_standard_input)
+ return;
+ isdir0 = is_directory(path[0]);
+ isdir1 = is_directory(path[1]);
+ if (isdir0 == isdir1)
+ return;
+ if (isdir0) {
+ append_basename(replacement, path[0], path[1]);
+ path[0] = replacement->buf;
+ } else {
+ append_basename(replacement, path[1], path[0]);
+ path[1] = replacement->buf;
+ }
+}
+
void diff_no_index(struct rev_info *revs,
int argc, const char **argv,
const char *prefix)
{
int i, prefixlen;
const char *paths[2];
+ struct strbuf replacement = STRBUF_INIT;
diff_setup(&revs->diffopt);
for (i = 1; i < argc - 2; ) {
@@ -217,6 +274,9 @@
p = xstrdup(prefix_filename(prefix, prefixlen, p));
paths[i] = p;
}
+
+ fixup_paths(paths, &replacement);
+
revs->diffopt.skip_stat_unmatch = 1;
if (!revs->diffopt.output_format)
revs->diffopt.output_format = DIFF_FORMAT_PATCH;
@@ -235,6 +295,8 @@
diffcore_std(&revs->diffopt);
diff_flush(&revs->diffopt);
+ strbuf_release(&replacement);
+
/*
* The return code for --no-index imitates diff(1):
* 0 = no changes, 1 = changes, else error
diff --git a/t/t4053-diff-no-index.sh b/t/t4053-diff-no-index.sh
index 2ab3c48..596dfe7 100755
--- a/t/t4053-diff-no-index.sh
+++ b/t/t4053-diff-no-index.sh
@@ -55,4 +55,38 @@
)
'
+test_expect_success 'diff D F and diff F D' '
+ (
+ cd repo &&
+ echo in-repo >a &&
+ echo non-repo >../non/git/a &&
+ mkdir sub &&
+ echo sub-repo >sub/a &&
+
+ test_must_fail git diff --no-index sub/a ../non/git/a >expect &&
+ test_must_fail git diff --no-index sub/a ../non/git/ >actual &&
+ test_cmp expect actual &&
+
+ test_must_fail git diff --no-index a ../non/git/a >expect &&
+ test_must_fail git diff --no-index a ../non/git/ >actual &&
+ test_cmp expect actual &&
+
+ test_must_fail git diff --no-index ../non/git/a a >expect &&
+ test_must_fail git diff --no-index ../non/git a >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'turning a file into a directory' '
+ (
+ cd non/git &&
+ mkdir d e e/sub &&
+ echo 1 >d/sub &&
+ echo 2 >e/sub/file &&
+ printf "D\td/sub\nA\te/sub/file\n" >expect &&
+ test_must_fail git diff --no-index --name-status d e >actual &&
+ test_cmp expect actual
+ )
+'
+
test_done
