path: root/apply.c
diff options
authorLinus Torvalds <>2006-02-26 17:29:00 (GMT)
committerJunio C Hamano <>2006-02-27 05:54:14 (GMT)
commit19bfcd5a14e647763e5ecc247ba24790f56721f3 (patch)
tree5ebabd21a44fdec5f7a7e2510efd184f7a932998 /apply.c
parentc55f3fff35ac34e6d1f0f686e27029612775e51d (diff)
The war on trailing whitespace
On Sat, 25 Feb 2006, Andrew Morton wrote: > > I'd suggest a) git will simply refuse to apply such a patch unless given a > special `forcing' flag, b) even when thus forced, it will still warn and c) > with a different flag, it will strip-then-apply, without generating a > warning. This doesn't do the "strip-then-apply" thing, but it allows you to make git-apply generate a warning or error on extraneous whitespace. Use --whitespace=warn to warn, and (surprise, surprise) --whitespace=error to make it a fatal error to have whitespace at the end. Totally untested, of course. But it compiles, so it must be fine. HOWEVER! Note that this literally will check every single patch-line with "+" at the beginning. Which means that if you fix a simple typo, and the line had a space at the end before, and you didn't remove it, that's still considered a "new line with whitespace at the end", even though obviously the line wasn't really new. I assume this is what you wanted, and there isn't really any sane alternatives (you could make the warning activate only for _pure_ additions with no deletions at all in that hunk, but that sounds a bit insane). Linus
Diffstat (limited to 'apply.c')
1 files changed, 33 insertions, 0 deletions
diff --git a/apply.c b/apply.c
index 244718c..e7b3dca 100644
--- a/apply.c
+++ b/apply.c
@@ -34,6 +34,12 @@ static int line_termination = '\n';
static const char apply_usage[] =
"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] [-pNUM] <patch>...";
+static enum whitespace_eol {
+ nowarn,
+ warn_on_whitespace,
+ error_on_whitespace
+} new_whitespace = nowarn;
* For "diff-stat" like behaviour, we keep track of the biggest change
* we've seen, and the longest filename. That allows us to do simple
@@ -815,6 +821,22 @@ static int parse_fragment(char *line, unsigned long size, struct patch *patch, s
case '+':
+ /*
+ * We know len is at least two, since we have a '+' and
+ * we checked that the last character was a '\n' above
+ */
+ if (isspace(line[len-2])) {
+ switch (new_whitespace) {
+ case nowarn:
+ break;
+ case warn_on_whitespace:
+ new_whitespace = nowarn; /* Just once */
+ error("Added whitespace at end of line at line %d", linenr);
+ break;
+ case error_on_whitespace:
+ die("Added whitespace at end of line at line %d", linenr);
+ }
+ }
@@ -1839,6 +1861,17 @@ int main(int argc, char **argv)
line_termination = 0;
+ if (!strncmp(arg, "--whitespace=", 13)) {
+ if (strcmp(arg+13, "warn")) {
+ new_whitespace = warn_on_whitespace;
+ continue;
+ }
+ if (strcmp(arg+13, "error")) {
+ new_whitespace = error_on_whitespace;
+ continue;
+ }
+ die("unrecognixed whitespace option '%s'", arg+13);
+ }
if (check_index && prefix_length < 0) {
prefix = setup_git_directory();