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Revision ae5d8470f6b8e1abdef19bf033472c63fb72b735 authored by Marco Roeland on 05 April 2006, 20:28:28 UTC, committed by Junio C Hamano on 05 April 2006, 21:07:21 UTC 
git-commit: document --amend
 
The "--amend" option is used to amend the tip of the current branch. This
documentation text was copied straight from the commit that implemented it.

Some minor format tweaks for asciidoc were taken from work by Francis Daly
in commit b0d08a5.. It looks good now also in the html page.

[jc: amended further to follow the recommendation by Francis in
commit 3070b60].

Signed-off-by: Marco Roeland <marco.roeland@xs4all.nl>
Signed-off-by: Junio C Hamano <junkio@cox.net>
1 parent 3ffe0c2
Raw File
patch-id.c 
#include "cache.h"

static void flush_current_id(int patchlen, unsigned char *id, SHA_CTX *c)
{
	unsigned char result[20];
	char name[50];

	if (!patchlen)
		return;

	SHA1_Final(result, c);
	memcpy(name, sha1_to_hex(id), 41);
	printf("%s %s\n", sha1_to_hex(result), name);
	SHA1_Init(c);
}

static int remove_space(char *line)
{
	char *src = line;
	char *dst = line;
	unsigned char c;

	while ((c = *src++) != '\0') {
		if (!isspace(c))
			*dst++ = c;
	}
	return dst - line;
}

static void generate_id_list(void)
{
	static unsigned char sha1[20];
	static char line[1000];
	SHA_CTX ctx;
	int patchlen = 0;

	SHA1_Init(&ctx);
	while (fgets(line, sizeof(line), stdin) != NULL) {
		unsigned char n[20];
		char *p = line;
		int len;

		if (!memcmp(line, "diff-tree ", 10))
			p += 10;

		if (!get_sha1_hex(p, n)) {
			flush_current_id(patchlen, sha1, &ctx);
			memcpy(sha1, n, 20);
			patchlen = 0;
			continue;
		}

		/* Ignore commit comments */
		if (!patchlen && memcmp(line, "diff ", 5))
			continue;

		/* Ignore git-diff index header */
		if (!memcmp(line, "index ", 6))
			continue;

		/* Ignore line numbers when computing the SHA1 of the patch */
		if (!memcmp(line, "@@ -", 4))
			continue;

		/* Compute the sha without whitespace */
		len = remove_space(line);
		patchlen += len;
		SHA1_Update(&ctx, line, len);
	}
	flush_current_id(patchlen, sha1, &ctx);
}

static const char patch_id_usage[] = "git-patch-id < patch";

int main(int argc, char **argv)
{
	if (argc != 1)
		usage(patch_id_usage);

	generate_id_list();
	return 0;
}
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