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
---
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, un
oldlines--;
break;
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);
+ }
+ }
added++;
newlines--;
break;
@@ -1839,6 +1861,17 @@ int main(int argc, char **argv)
line_termination = 0;
continue;
}
+ 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();
-
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