"git diff" has a --check option that can be used to check for whitespace
problems but it only reported by printing warnings to the
console.
Now when the --check option is used we give a non-zero exit status,
making "git diff --check" nicer to use in scripts and hooks.
Signed-off-by: Wincent Colaiuta <win@xxxxxxxxxxx>
---
Documentation/diff-options.txt | 4 +-
builtin-diff-files.c | 2 +
builtin-diff-index.c | 2 +
builtin-diff-tree.c | 28 ++++----
builtin-diff.c | 3 +-
diff.c | 37 +++++++----
diff.h | 1 +
t/t4015-diff-whitespace.sh | 131 ++++++++++++++++++++++++++++++++++++++++
8 files changed, 179 insertions(+), 29 deletions(-)
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 5d22b7b..9ecc1d7 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -93,7 +93,9 @@ endif::git-format-patch[]
--check::
Warn if changes introduce trailing whitespace
- or an indent that uses a space before a tab.
+ or an indent that uses a space before a tab. Exits with
+ non-zero status if problems are found. Not compatible with
+ --exit-code.
--full-index::
Instead of the first handful characters, show full
diff --git a/builtin-diff-files.c b/builtin-diff-files.c
index 046b7e3..4afc872 100644
--- a/builtin-diff-files.c
+++ b/builtin-diff-files.c
@@ -33,5 +33,7 @@ int cmd_diff_files(int argc, const char **argv, const char *prefix)
result = run_diff_files_cmd(&rev, argc, argv);
if (DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS))
return DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES) != 0;
+ if (rev.diffopt.output_format & DIFF_FORMAT_CHECKDIFF)
+ return DIFF_OPT_TST(&rev.diffopt, CHECK_FAILED) != 0;
return result;
}
diff --git a/builtin-diff-index.c b/builtin-diff-index.c
index 556c506..532b284 100644
--- a/builtin-diff-index.c
+++ b/builtin-diff-index.c
@@ -46,5 +46,7 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix)
result = run_diff_index(&rev, cached);
if (DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS))
return DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES) != 0;
+ if (rev.diffopt.output_format & DIFF_FORMAT_CHECKDIFF)
+ return DIFF_OPT_TST(&rev.diffopt, CHECK_FAILED) != 0;
return result;
}
diff --git a/builtin-diff-tree.c b/builtin-diff-tree.c
index 2e13716..9ab90cb 100644
--- a/builtin-diff-tree.c
+++ b/builtin-diff-tree.c
@@ -117,23 +117,23 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
break;
}
- if (!read_stdin)
- return DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS)
- && DIFF_OPT_TST(&opt->diffopt, HAS_CHANGES);
+ if (read_stdin) {
+ if (opt->diffopt.detect_rename)
+ opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
+ DIFF_SETUP_USE_CACHE);
+ while (fgets(line, sizeof(line), stdin)) {
+ unsigned char sha1[20];
- if (opt->diffopt.detect_rename)
- opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
- DIFF_SETUP_USE_CACHE);
- while (fgets(line, sizeof(line), stdin)) {
- unsigned char sha1[20];
-
- if (get_sha1_hex(line, sha1)) {
- fputs(line, stdout);
- fflush(stdout);
+ if (get_sha1_hex(line, sha1)) {
+ fputs(line, stdout);
+ fflush(stdout);
+ }
+ else
+ diff_tree_stdin(line);
}
- else
- diff_tree_stdin(line);
}
+ if (opt->diffopt.output_format & DIFF_FORMAT_CHECKDIFF)
+ return DIFF_OPT_TST(&opt->diffopt, CHECK_FAILED) != 0;
return DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS)
&& DIFF_OPT_TST(&opt->diffopt, HAS_CHANGES);
}
diff --git a/builtin-diff.c b/builtin-diff.c
index 1b61599..6aeea93 100644
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -365,7 +365,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
ent, ents);
if (DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS))
result = DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES) != 0;
-
+ if (rev.diffopt.output_format & DIFF_FORMAT_CHECKDIFF)
+ return DIFF_OPT_TST(&rev.diffopt, CHECK_FAILED) != 0;
if (1 < rev.diffopt.skip_stat_unmatch)
refresh_index_quietly();
return result;
diff --git a/diff.c b/diff.c
index e74a303..e89c7ce 100644
--- a/diff.c
+++ b/diff.c
@@ -996,6 +996,7 @@ struct checkdiff_t {
const char *filename;
int lineno, color_diff;
unsigned ws_rule;
+ int status;
};
static void checkdiff_consume(void *priv, char *line, unsigned long len)
@@ -1022,6 +1023,7 @@ static void checkdiff_consume(void *priv, char *line, unsigned long len)
white_space_at_end = 1;
if (space_before_tab || white_space_at_end) {
+ data->status = 1;
printf("%s:%d: %s", data->filename, data->lineno, ws);
if (space_before_tab) {
printf("space before tab");
@@ -1412,7 +1414,7 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
diff_free_filespec_data(two);
}
-static void builtin_checkdiff(const char *name_a, const char *name_b,
+static int builtin_checkdiff(const char *name_a, const char *name_b,
struct diff_filespec *one,
struct diff_filespec *two, struct diff_options *o)
{
@@ -1420,7 +1422,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
struct checkdiff_t data;
if (!two)
- return;
+ return 0;
memset(&data, 0, sizeof(data));
data.xm.consume = checkdiff_consume;
@@ -1449,6 +1451,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
free_and_return:
diff_free_filespec_data(one);
diff_free_filespec_data(two);
+ return data.status;
}
struct diff_filespec *alloc_filespec(const char *path)
@@ -2033,14 +2036,14 @@ static void run_diffstat(struct diff_filepair *p, struct diff_options *o,
builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite);
}
-static void run_checkdiff(struct diff_filepair *p, struct diff_options *o)
+static int run_checkdiff(struct diff_filepair *p, struct diff_options *o)
{
const char *name;
const char *other;
if (DIFF_PAIR_UNMERGED(p)) {
/* unmerged */
- return;
+ return 0;
}
name = p->one->path;
@@ -2049,7 +2052,7 @@ static void run_checkdiff(struct diff_filepair *p, struct diff_options *o)
diff_fill_sha1_info(p->one);
diff_fill_sha1_info(p->two);
- builtin_checkdiff(name, other, p->one, p->two, o);
+ return builtin_checkdiff(name, other, p->one, p->two, o);
}
void diff_setup(struct diff_options *options)
@@ -2079,7 +2082,12 @@ int diff_setup_done(struct diff_options *options)
if (options->output_format & DIFF_FORMAT_NAME_STATUS)
count++;
if (options->output_format & DIFF_FORMAT_CHECKDIFF)
+ {
count++;
+ if (DIFF_OPT_TST(options, QUIET) ||
+ DIFF_OPT_TST(options, EXIT_WITH_STATUS))
+ die("--check may not be used with --quiet or --exit-code");
+ }
if (options->output_format & DIFF_FORMAT_NO_OUTPUT)
count++;
if (count > 1)
@@ -2546,17 +2554,17 @@ static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o,
run_diffstat(p, o, diffstat);
}
-static void diff_flush_checkdiff(struct diff_filepair *p,
+static int diff_flush_checkdiff(struct diff_filepair *p,
struct diff_options *o)
{
if (diff_unmodified_pair(p))
- return;
+ return 0;
if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
(DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
- return; /* no tree diffs in patch format */
+ return 0; /* no tree diffs in patch format */
- run_checkdiff(p, o);
+ return run_checkdiff(p, o);
}
int diff_queue_is_empty(void)
@@ -2675,16 +2683,19 @@ static int check_pair_status(struct diff_filepair *p)
}
}
-static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt)
+static int flush_one_pair(struct diff_filepair *p, struct diff_options *opt)
{
int fmt = opt->output_format;
if (fmt & DIFF_FORMAT_CHECKDIFF)
- diff_flush_checkdiff(p, opt);
+ return diff_flush_checkdiff(p, opt);
else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS))
diff_flush_raw(p, opt);
else if (fmt & DIFF_FORMAT_NAME)
write_name_quoted(p->two->path, stdout, opt->line_termination);
+
+ /* return value only matters with DIFF_FORMAT_CHECKDIFF */
+ return 0;
}
static void show_file_mode_name(const char *newdelete, struct diff_filespec *fs)
@@ -2923,8 +2934,8 @@ void diff_flush(struct diff_options *options)
DIFF_FORMAT_CHECKDIFF)) {
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
- if (check_pair_status(p))
- flush_one_pair(p, options);
+ if (check_pair_status(p) && flush_one_pair(p, options))
+ DIFF_OPT_SET(options, CHECK_FAILED);
}
separator++;
}
diff --git a/diff.h b/diff.h
index a52496a..5d50d93 100644
--- a/diff.h
+++ b/diff.h
@@ -59,6 +59,7 @@ typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
#define DIFF_OPT_ALLOW_EXTERNAL (1 << 13)
#define DIFF_OPT_EXIT_WITH_STATUS (1 << 14)
#define DIFF_OPT_REVERSE_DIFF (1 << 15)
+#define DIFF_OPT_CHECK_FAILED (1 << 16)
#define DIFF_OPT_TST(opts, flag) ((opts)->flags & DIFF_OPT_##flag)
#define DIFF_OPT_SET(opts, flag) ((opts)->flags |= DIFF_OPT_##flag)
#define DIFF_OPT_CLR(opts, flag) ((opts)->flags &= ~DIFF_OPT_##flag)
diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index 79fdff3..5aaf2db 100755
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -117,4 +117,135 @@ EOF
git diff -b > out
test_expect_success 'another test, with -b' 'git diff expect out'
+test_expect_success 'check with no whitespace errors' '
+
+ git commit -m "snapshot" &&
+ echo "foo();" > x &&
+ git diff --check
+
+'
+
+test_expect_failure 'check with trailing whitespace' '
+
+ echo "foo(); " > x &&
+ git diff --check
+
+'
+
+test_expect_failure 'check with space before tab in indent' '
+
+ echo " foo();" > x &&
+ git diff --check
+
+'
+
+test_expect_failure '--check and --exit-code are exclusive' '
+
+ git checkout x &&
+ git diff --check --exit-code
+
+'
+
+test_expect_failure '--check and --quiet are exclusive' '
+
+ git diff --check --quiet
+
+'
+
+test_expect_success 'check staged with no whitespace errors' '
+
+ echo "foo();" > x &&
+ git add x &&
+ git diff --cached --check
+
+'
+
+test_expect_failure 'check staged with trailing whitespace' '
+
+ echo "foo(); " > x &&
+ git add x &&
+ git diff --cached --check
+
+'
+
+test_expect_failure 'check staged with space before tab in indent' '
+
+ echo " foo();" > x &&
+ git add x &&
+ git diff --cached --check
+
+'
+
+test_expect_success 'check with no whitespace errors (diff-index)' '
+
+ echo "foo();" > x &&
+ git add x &&
+ git diff-index --check HEAD
+
+'
+
+test_expect_failure 'check with trailing whitespace (diff-index)' '
+
+ echo "foo(); " > x &&
+ git add x &&
+ git diff-index --check HEAD
+
+'
+
+test_expect_failure 'check with space before tab in indent (diff-index)' '
+
+ echo " foo();" > x &&
+ git add x &&
+ git diff-index --check HEAD
+
+'
+
+test_expect_success 'check staged with no whitespace errors (diff-index)' '
+
+ echo "foo();" > x &&
+ git add x &&
+ git diff-index --cached --check HEAD
+
+'
+
+test_expect_failure 'check staged with trailing whitespace (diff-index)' '
+
+ echo "foo(); " > x &&
+ git add x &&
+ git diff-index --cached --check HEAD
+
+'
+
+test_expect_failure 'check staged with space before tab in indent (diff-index)' '
+
+ echo " foo();" > x &&
+ git add x &&
+ git diff-index --cached --check HEAD
+
+'
+
+test_expect_success 'check with no whitespace errors (diff-tree)' '
+
+ echo "foo();" > x &&
+ git commit -m "new commit" x &&
+ git diff-tree --check HEAD^ HEAD
+
+'
+
+test_expect_failure 'check with trailing whitespace (diff-tree)' '
+
+ echo "foo(); " > x &&
+ git commit -m "another commit" x &&
+ git diff-tree --check HEAD^ HEAD
+
+'
+
+test_expect_failure 'check with space before tab in indent (diff-tree)' '
+
+ echo " foo();" > x &&
+ git commit -m "yet another" x &&
+ git diff-tree --check HEAD^ HEAD
+
+'
+
test_done
--
1.5.3.7.1159.g2f071-dirty
-
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