mirror of
https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
![Johannes Schindelin](/assets/img/avatar_default.png)
With --strip-comments (or short -s), git stripspace now removes lines beginning with a '#', too. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
100 lines
2 KiB
C
100 lines
2 KiB
C
#include "builtin.h"
|
|
#include "cache.h"
|
|
|
|
/*
|
|
* Returns the length of a line, without trailing spaces.
|
|
*
|
|
* If the line ends with newline, it will be removed too.
|
|
*/
|
|
static size_t cleanup(char *line, size_t len)
|
|
{
|
|
if (len) {
|
|
if (line[len - 1] == '\n')
|
|
len--;
|
|
|
|
while (len) {
|
|
unsigned char c = line[len - 1];
|
|
if (!isspace(c))
|
|
break;
|
|
len--;
|
|
}
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* Remove empty lines from the beginning and end
|
|
* and also trailing spaces from every line.
|
|
*
|
|
* Note that the buffer will not be NUL-terminated.
|
|
*
|
|
* Turn multiple consecutive empty lines between paragraphs
|
|
* into just one empty line.
|
|
*
|
|
* If the input has only empty lines and spaces,
|
|
* no output will be produced.
|
|
*
|
|
* If last line has a newline at the end, it will be removed.
|
|
*
|
|
* Enable skip_comments to skip every line starting with "#".
|
|
*/
|
|
size_t stripspace(char *buffer, size_t length, int skip_comments)
|
|
{
|
|
int empties = -1;
|
|
size_t i, j, len, newlen;
|
|
char *eol;
|
|
|
|
for (i = j = 0; i < length; i += len, j += newlen) {
|
|
eol = memchr(buffer + i, '\n', length - i);
|
|
len = eol ? eol - (buffer + i) + 1 : length - i;
|
|
|
|
if (skip_comments && len && buffer[i] == '#') {
|
|
newlen = 0;
|
|
continue;
|
|
}
|
|
newlen = cleanup(buffer + i, len);
|
|
|
|
/* Not just an empty line? */
|
|
if (newlen) {
|
|
if (empties != -1)
|
|
buffer[j++] = '\n';
|
|
if (empties > 0)
|
|
buffer[j++] = '\n';
|
|
empties = 0;
|
|
memmove(buffer + j, buffer + i, newlen);
|
|
continue;
|
|
}
|
|
if (empties < 0)
|
|
continue;
|
|
empties++;
|
|
}
|
|
|
|
return j;
|
|
}
|
|
|
|
int cmd_stripspace(int argc, const char **argv, const char *prefix)
|
|
{
|
|
char *buffer;
|
|
unsigned long size;
|
|
int strip_comments = 0;
|
|
|
|
if (argc > 1 && (!strcmp(argv[1], "-s") ||
|
|
!strcmp(argv[1], "--strip-comments")))
|
|
strip_comments = 1;
|
|
|
|
size = 1024;
|
|
buffer = xmalloc(size);
|
|
if (read_fd(0, &buffer, &size)) {
|
|
free(buffer);
|
|
die("could not read the input");
|
|
}
|
|
|
|
size = stripspace(buffer, size, strip_comments);
|
|
write_or_die(1, buffer, size);
|
|
if (size)
|
|
putc('\n', stdout);
|
|
|
|
free(buffer);
|
|
return 0;
|
|
}
|