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git-apply: second war on whitespace.

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This makes --whitespace={warn,error,strip} option to also notice
the leading whitespace errors in addition to the trailing
whitespace errors.  Spaces that are followed by a tab in indent
are detected as errors, and --whitespace=strip option fixes them.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-09-23 00:37:19 -07:00
parent 448c3ef144
commit d0c25035df
1 changed files with 97 additions and 25 deletions
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122
builtin-apply.c
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@ -854,6 +854,49 @@ static int find_header(char *line, unsigned long size, int *hdrsize, struct patc
return -1;
}
static void check_whitespace(const char *line, int len)
{
const char *err = "Adds trailing whitespace";
int seen_space = 0;
int i;
/*
* We know len is at least two, since we have a '+' and we
* checked that the last character was a '\n' before calling
* this function. That is, an addition of an empty line would
* check the '+' here. Sneaky...
*/
if (isspace(line[len-2]))
goto error;
/*
* Make sure that there is no space followed by a tab in
* indentation.
*/
err = "Space in indent is followed by a tab";
for (i = 1; i < len; i++) {
if (line[i] == '\t') {
if (seen_space)
goto error;
}
else if (line[i] == ' ')
seen_space = 1;
else
break;
}
return;
error:
whitespace_error++;
if (squelch_whitespace_errors &&
squelch_whitespace_errors < whitespace_error)
;
else
fprintf(stderr, "%s.\n%s:%d:%.*s\n",
err, patch_input_file, linenr, len-2, line+1);
}
/*
* Parse a unified diff. Note that this really needs to parse each
* fragment separately, since the only way to know the difference
@ -904,25 +947,8 @@ static int parse_fragment(char *line, unsigned long size, struct patch *patch, s
trailing = 0;
break;
case '+':
/*
* We know len is at least two, since we have a '+' and
* we checked that the last character was a '\n' above.
* That is, an addition of an empty line would check
* the '+' here. Sneaky...
*/
if ((new_whitespace != nowarn_whitespace) &&
isspace(line[len-2])) {
whitespace_error++;
if (squelch_whitespace_errors &&
squelch_whitespace_errors <
whitespace_error)
;
else {
fprintf(stderr, "Adds trailing whitespace.\n%s:%d:%.*s\n",
patch_input_file,
linenr, len-2, line+1);
}
}
if (new_whitespace != nowarn_whitespace)
check_whitespace(line, len);
added++;
newlines--;
trailing = 0;
@ -1494,22 +1520,68 @@ static int apply_line(char *output, const char *patch, int plen)
{
/* plen is number of bytes to be copied from patch,
* starting at patch+1 (patch[0] is '+'). Typically
* patch[plen] is '\n'.
* patch[plen] is '\n', unless this is the incomplete
* last line.
*/
int i;
int add_nl_to_tail = 0;
if ((new_whitespace == strip_whitespace) &&
1 < plen && isspace(patch[plen-1])) {
int fixed = 0;
int last_tab_in_indent = -1;
int last_space_in_indent = -1;
int need_fix_leading_space = 0;
char *buf;
if ((new_whitespace != strip_whitespace) || !whitespace_error) {
memcpy(output, patch + 1, plen);
return plen;
}
if (1 < plen && isspace(patch[plen-1])) {
if (patch[plen] == '\n')
add_nl_to_tail = 1;
plen--;
while (0 < plen && isspace(patch[plen]))
plen--;
applied_after_stripping++;
fixed = 1;
}
memcpy(output, patch + 1, plen);
for (i = 1; i < plen; i++) {
char ch = patch[i];
if (ch == '\t') {
last_tab_in_indent = i;
if (0 <= last_space_in_indent)
need_fix_leading_space = 1;
}
else if (ch == ' ')
last_space_in_indent = i;
else
break;
}
buf = output;
if (need_fix_leading_space) {
/* between patch[1..last_tab_in_indent] strip the
* funny spaces, updating them to tab as needed.
*/
for (i = 1; i < last_tab_in_indent; i++, plen--) {
char ch = patch[i];
if (ch != ' ')
*output++ = ch;
else if ((i % 8) == 0)
*output++ = '\t';
}
fixed = 1;
i = last_tab_in_indent;
}
else
i = 1;
memcpy(output, patch + i, plen);
if (add_nl_to_tail)
output[plen++] = '\n';
return plen;
if (fixed)
applied_after_stripping++;
return output + plen - buf;
}
static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag, int inaccurate_eof)