aboutsummaryrefslogtreecommitdiff
path: root/diff.c
diff options
context:
space:
mode:
authorJunio C Hamano <gitster@pobox.com>2008-07-01 16:22:35 -0700
committerJunio C Hamano <gitster@pobox.com>2008-07-01 16:22:35 -0700
commitd4b76e15ea733002e364298a81889452b8bb2dfd (patch)
tree5a8456715cf28f96e247cd2f3f61cf5922910b09 /diff.c
parentf7c3cf8106c09c714d46d39e8eef69838db8b339 (diff)
parentab20fda99236e38edf5d63f964b6b920b494aacb (diff)
downloadgit-d4b76e15ea733002e364298a81889452b8bb2dfd.tar.gz
git-d4b76e15ea733002e364298a81889452b8bb2dfd.tar.xz
Merge branch 'jc/checkdiff'
* jc/checkdiff: Fix t4017-diff-retval for white-space from wc Update sample pre-commit hook to use "diff --check" diff --check: detect leftover conflict markers Teach "diff --check" about new blank lines at end checkdiff: pass diff_options to the callback check_and_emit_line(): rename and refactor diff --check: explain why we do not care whether old side is binary
Diffstat (limited to 'diff.c')
-rw-r--r--diff.c95
1 files changed, 75 insertions, 20 deletions
diff --git a/diff.c b/diff.c
index 66851b564..803fbba45 100644
--- a/diff.c
+++ b/diff.c
@@ -535,9 +535,9 @@ static void emit_add_line(const char *reset, struct emit_callback *ecbdata, cons
else {
/* Emit just the prefix, then the rest. */
emit_line(ecbdata->file, set, reset, line, ecbdata->nparents);
- (void)check_and_emit_line(line + ecbdata->nparents,
- len - ecbdata->nparents, ecbdata->ws_rule,
- ecbdata->file, set, reset, ws);
+ ws_check_emit(line + ecbdata->nparents,
+ len - ecbdata->nparents, ecbdata->ws_rule,
+ ecbdata->file, set, reset, ws);
}
}
@@ -1136,42 +1136,85 @@ static void free_diffstat_info(struct diffstat_t *diffstat)
struct checkdiff_t {
struct xdiff_emit_state xm;
const char *filename;
- int lineno, color_diff;
+ int lineno;
+ struct diff_options *o;
unsigned ws_rule;
unsigned status;
- FILE *file;
+ int trailing_blanks_start;
};
+static int is_conflict_marker(const char *line, unsigned long len)
+{
+ char firstchar;
+ int cnt;
+
+ if (len < 8)
+ return 0;
+ firstchar = line[0];
+ switch (firstchar) {
+ case '=': case '>': case '<':
+ break;
+ default:
+ return 0;
+ }
+ for (cnt = 1; cnt < 7; cnt++)
+ if (line[cnt] != firstchar)
+ return 0;
+ /* line[0] thru line[6] are same as firstchar */
+ if (firstchar == '=') {
+ /* divider between ours and theirs? */
+ if (len != 8 || line[7] != '\n')
+ return 0;
+ } else if (len < 8 || !isspace(line[7])) {
+ /* not divider before ours nor after theirs */
+ return 0;
+ }
+ return 1;
+}
+
static void checkdiff_consume(void *priv, char *line, unsigned long len)
{
struct checkdiff_t *data = priv;
- const char *ws = diff_get_color(data->color_diff, DIFF_WHITESPACE);
- const char *reset = diff_get_color(data->color_diff, DIFF_RESET);
- const char *set = diff_get_color(data->color_diff, DIFF_FILE_NEW);
+ int color_diff = DIFF_OPT_TST(data->o, COLOR_DIFF);
+ const char *ws = diff_get_color(color_diff, DIFF_WHITESPACE);
+ const char *reset = diff_get_color(color_diff, DIFF_RESET);
+ const char *set = diff_get_color(color_diff, DIFF_FILE_NEW);
char *err;
if (line[0] == '+') {
unsigned bad;
data->lineno++;
- bad = check_and_emit_line(line + 1, len - 1,
- data->ws_rule, NULL, NULL, NULL, NULL);
+ if (!ws_blank_line(line + 1, len - 1, data->ws_rule))
+ data->trailing_blanks_start = 0;
+ else if (!data->trailing_blanks_start)
+ data->trailing_blanks_start = data->lineno;
+ if (is_conflict_marker(line + 1, len - 1)) {
+ data->status |= 1;
+ fprintf(data->o->file,
+ "%s:%d: leftover conflict marker\n",
+ data->filename, data->lineno);
+ }
+ bad = ws_check(line + 1, len - 1, data->ws_rule);
if (!bad)
return;
data->status |= bad;
err = whitespace_error_string(bad);
- fprintf(data->file, "%s:%d: %s.\n", data->filename, data->lineno, err);
+ fprintf(data->o->file, "%s:%d: %s.\n",
+ data->filename, data->lineno, err);
free(err);
- emit_line(data->file, set, reset, line, 1);
- (void)check_and_emit_line(line + 1, len - 1, data->ws_rule,
- data->file, set, reset, ws);
- } else if (line[0] == ' ')
+ emit_line(data->o->file, set, reset, line, 1);
+ ws_check_emit(line + 1, len - 1, data->ws_rule,
+ data->o->file, set, reset, ws);
+ } else if (line[0] == ' ') {
data->lineno++;
- else if (line[0] == '@') {
+ data->trailing_blanks_start = 0;
+ } else if (line[0] == '@') {
char *plus = strchr(line, '+');
if (plus)
data->lineno = strtol(plus, NULL, 10) - 1;
else
die("invalid diff");
+ data->trailing_blanks_start = 0;
}
}
@@ -1544,8 +1587,9 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
static void builtin_checkdiff(const char *name_a, const char *name_b,
const char *attr_path,
- struct diff_filespec *one,
- struct diff_filespec *two, struct diff_options *o)
+ struct diff_filespec *one,
+ struct diff_filespec *two,
+ struct diff_options *o)
{
mmfile_t mf1, mf2;
struct checkdiff_t data;
@@ -1557,13 +1601,18 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
data.xm.consume = checkdiff_consume;
data.filename = name_b ? name_b : name_a;
data.lineno = 0;
- data.color_diff = DIFF_OPT_TST(o, COLOR_DIFF);
+ data.o = o;
data.ws_rule = whitespace_rule(attr_path);
- data.file = o->file;
if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
die("unable to read files to diff");
+ /*
+ * All the other codepaths check both sides, but not checking
+ * the "old" side here is deliberate. We are checking the newly
+ * introduced changes, and as long as the "new" side is text, we
+ * can and should check what it introduces.
+ */
if (diff_filespec_is_binary(two))
goto free_and_return;
else {
@@ -1577,6 +1626,12 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
ecb.outf = xdiff_outf;
ecb.priv = &data;
xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+
+ if (data.trailing_blanks_start) {
+ fprintf(o->file, "%s:%d: ends with blank lines.\n",
+ data.filename, data.trailing_blanks_start);
+ data.status = 1; /* report errors */
+ }
}
free_and_return:
diff_free_filespec_data(one);