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/*
* rev-parse.c
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
#include "commit.h"
#include "refs.h"
static char *def = NULL;
static int no_revs = 0;
static int single_rev = 0;
static int revs_only = 0;
static int do_rev_argument = 1;
static int output_revs = 0;
static int flags_only = 0;
static int no_flags = 0;
static int output_sq = 0;
#define NORMAL 0
#define REVERSED 1
static int show_type = NORMAL;
/*
* Some arguments are relevant "revision" arguments,
* others are about output format or other details.
* This sorts it all out.
*/
static int is_rev_argument(const char *arg)
{
static const char *rev_args[] = {
"--max-count=",
"--max-age=",
"--min-age=",
"--merge-order",
NULL
};
const char **p = rev_args;
for (;;) {
const char *str = *p++;
int len;
if (!str)
return 0;
len = strlen(str);
if (!strncmp(arg, str, len))
return 1;
}
}
static void show(const char *arg)
{
if (output_sq) {
int sq = '\'', ch;
putchar(sq);
while ((ch = *arg++)) {
if (ch == sq)
fputs("'\\'", stdout);
putchar(ch);
}
putchar(sq);
putchar(' ');
}
else
puts(arg);
}
static void show_rev(int type, const unsigned char *sha1)
{
if (no_revs)
return;
output_revs++;
/* Hexadecimal string plus possibly a carret;
* this does not have to be quoted even under output_sq.
*/
printf("%s%s%c", type == show_type ? "" : "^", sha1_to_hex(sha1),
output_sq ? ' ' : '\n');
}
static void show_rev_arg(char *rev)
{
if (no_revs)
return;
show(rev);
}
static void show_norev(char *norev)
{
if (flags_only)
return;
if (revs_only)
return;
show(norev);
}
static void show_arg(char *arg)
{
if (no_flags)
return;
if (do_rev_argument && is_rev_argument(arg))
show_rev_arg(arg);
else
show_norev(arg);
}
static void show_default(void)
{
char *s = def;
if (s) {
unsigned char sha1[20];
def = NULL;
if (!get_sha1(s, sha1)) {
show_rev(NORMAL, sha1);
return;
}
show_arg(s);
}
}
static int show_reference(const char *refname, const unsigned char *sha1)
{
show_rev(NORMAL, sha1);
return 0;
}
int main(int argc, char **argv)
{
int i, as_is = 0;
unsigned char sha1[20];
for (i = 1; i < argc; i++) {
char *arg = argv[i];
char *dotdot;
if (as_is) {
show_norev(arg);
continue;
}
if (*arg == '-') {
if (!strcmp(arg, "--")) {
show_default();
if (revs_only)
break;
as_is = 1;
}
if (!strcmp(arg, "--default")) {
def = argv[i+1];
i++;
continue;
}
if (!strcmp(arg, "--revs-only")) {
revs_only = 1;
continue;
}
if (!strcmp(arg, "--no-revs")) {
no_revs = 1;
continue;
}
if (!strcmp(arg, "--flags")) {
flags_only = 1;
continue;
}
if (!strcmp(arg, "--no-flags")) {
no_flags = 1;
continue;
}
if (!strcmp(arg, "--verify")) {
revs_only = 1;
do_rev_argument = 0;
single_rev = 1;
continue;
}
if (!strcmp(arg, "--sq")) {
output_sq = 1;
continue;
}
if (!strcmp(arg, "--not")) {
show_type ^= REVERSED;
continue;
}
if (!strcmp(arg, "--all")) {
for_each_ref(show_reference);
continue;
}
show_arg(arg);
continue;
}
dotdot = strstr(arg, "..");
if (dotdot) {
unsigned char end[20];
char *n = dotdot+2;
*dotdot = 0;
if (!get_sha1(arg, sha1)) {
if (!*n)
n = "HEAD";
if (!get_sha1(n, end)) {
if (no_revs)
continue;
def = NULL;
show_rev(NORMAL, end);
show_rev(REVERSED, sha1);
continue;
}
}
*dotdot = '.';
}
if (!get_sha1(arg, sha1)) {
if (no_revs)
continue;
def = NULL;
show_rev(NORMAL, sha1);
continue;
}
if (*arg == '^' && !get_sha1(arg+1, sha1)) {
if (no_revs)
continue;
def = NULL;
show_rev(REVERSED, sha1);
continue;
}
show_default();
show_norev(arg);
}
show_default();
if (single_rev && output_revs != 1) {
fprintf(stderr, "Needed a single revision\n");
exit(1);
}
return 0;
}
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