#include "cache.h"
#include "commit.h"
#include "refs.h"
+#include "quote.h"
+
+#define DO_REVS 1
+#define DO_NOREV 2
+#define DO_FLAGS 4
+#define DO_NONFLAGS 8
+static int filter = ~0;
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;
#define NORMAL 0
#define REVERSED 1
static int show_type = NORMAL;
+static int symbolic = 0;
+static int abbrev = 0;
+static int output_sq = 0;
-static int get_extended_sha1(char *name, unsigned char *sha1);
+static int revs_count = 0;
/*
* Some arguments are relevant "revision" arguments,
static int is_rev_argument(const char *arg)
{
static const char *rev_args[] = {
- "--max-count=",
+ "--all",
+ "--bisect",
+ "--dense",
+ "--header",
"--max-age=",
- "--min-age=",
+ "--max-count=",
"--merge-order",
+ "--min-age=",
+ "--no-merges",
+ "--objects",
+ "--parents",
+ "--pretty",
+ "--show-breaks",
+ "--sparse",
+ "--topo-order",
+ "--unpacked",
NULL
};
const char **p = rev_args;
+ /* accept -<digit>, like traditional "head" */
+ if ((*arg == '-') && isdigit(arg[1]))
+ return 1;
+
for (;;) {
const char *str = *p++;
int len;
if (!str)
return 0;
len = strlen(str);
- if (!strncmp(arg, str, len))
+ if (!strcmp(arg, str) ||
+ (str[len-1] == '=' && !strncmp(arg, str, len)))
return 1;
}
}
-static void show_rev(int type, const unsigned char *sha1)
+/* Output argument as a string, either SQ or normal */
+static void show(const char *arg)
{
- if (no_revs)
- return;
- output_revs++;
- printf("%s%s\n", type == show_type ? "" : "^", sha1_to_hex(sha1));
-}
+ if (output_sq) {
+ int sq = '\'', ch;
-static void show_rev_arg(char *rev)
-{
- if (no_revs)
- return;
- puts(rev);
+ putchar(sq);
+ while ((ch = *arg++)) {
+ if (ch == sq)
+ fputs("'\\'", stdout);
+ putchar(ch);
+ }
+ putchar(sq);
+ putchar(' ');
+ }
+ else
+ puts(arg);
}
-static void show_norev(char *norev)
+/* Output a revision, only if filter allows it */
+static void show_rev(int type, const unsigned char *sha1, const char *name)
{
- if (flags_only)
- return;
- if (revs_only)
+ if (!(filter & DO_REVS))
return;
- puts(norev);
-}
+ def = NULL;
+ revs_count++;
-static void show_arg(char *arg)
-{
- if (no_flags)
- return;
- if (do_rev_argument && is_rev_argument(arg))
- show_rev_arg(arg);
+ if (type != show_type)
+ putchar('^');
+ if (symbolic && name)
+ show(name);
+ else if (abbrev)
+ show(find_unique_abbrev(sha1, abbrev));
else
- show_norev(arg);
+ show(sha1_to_hex(sha1));
}
-static int get_parent(char *name, unsigned char *result, int idx)
+/* Output a flag, only if filter allows it. */
+static int show_flag(char *arg)
{
- unsigned char sha1[20];
- int ret = get_extended_sha1(name, sha1);
- struct commit *commit;
- struct commit_list *p;
-
- if (ret)
- return ret;
- commit = lookup_commit_reference(sha1);
- if (!commit)
- return -1;
- if (parse_commit(commit))
- return -1;
- if (!idx) {
- memcpy(result, commit->object.sha1, 20);
+ if (!(filter & DO_FLAGS))
return 0;
+ if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
+ show(arg);
+ return 1;
}
- p = commit->parents;
- while (p) {
- if (!--idx) {
- memcpy(result, p->item->object.sha1, 20);
- return 0;
- }
- p = p->next;
- }
- return -1;
-}
-
-static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
-{
- static char dirname[PATH_MAX];
- char hex[40];
- DIR *dir;
- int found;
-
- snprintf(dirname, sizeof(dirname), "%s/%.2s", get_object_directory(), name);
- dir = opendir(dirname);
- sprintf(hex, "%.2s", name);
- found = 0;
- if (dir) {
- struct dirent *de;
- while ((de = readdir(dir)) != NULL) {
- if (strlen(de->d_name) != 38)
- continue;
- if (memcmp(de->d_name, name + 2, len-2))
- continue;
- memcpy(hex + 2, de->d_name, 38);
- if (++found > 1)
- break;
- }
- closedir(dir);
- }
- if (found == 1)
- return get_sha1_hex(hex, sha1) == 0;
return 0;
}
-static int match_sha(unsigned len, const unsigned char *a, const unsigned char *b)
-{
- do {
- if (*a != *b)
- return 0;
- a++;
- b++;
- len -= 2;
- } while (len > 1);
- if (len)
- if ((*a ^ *b) & 0xf0)
- return 0;
- return 1;
-}
-
-static int find_short_packed_object(int len, const unsigned char *match, unsigned char *sha1)
+static void show_default(void)
{
- struct packed_git *p;
+ char *s = def;
- prepare_packed_git();
- for (p = packed_git; p; p = p->next) {
- unsigned num = num_packed_objects(p);
- unsigned first = 0, last = num;
- while (first < last) {
- unsigned mid = (first + last) / 2;
- unsigned char now[20];
- int cmp;
+ if (s) {
+ unsigned char sha1[20];
- nth_packed_object_sha1(p, mid, now);
- cmp = memcmp(match, now, 20);
- if (!cmp) {
- first = mid;
- break;
- }
- if (cmp > 0) {
- first = mid+1;
- continue;
- }
- last = mid;
+ def = NULL;
+ if (!get_sha1(s, sha1)) {
+ show_rev(NORMAL, sha1, s);
+ return;
}
- if (first < num) {
- unsigned char now[20], next[20];
- nth_packed_object_sha1(p, first, now);
- if (match_sha(len, match, now)) {
- if (nth_packed_object_sha1(p, first+1, next) || !match_sha(len, match, next)) {
- memcpy(sha1, now, 20);
- return 1;
- }
- }
- }
}
- return 0;
}
-static int get_short_sha1(char *name, unsigned char *sha1)
+static int show_reference(const char *refname, const unsigned char *sha1)
{
- int i;
- char canonical[40];
- unsigned char res[20];
-
- memset(res, 0, 20);
- memset(canonical, 'x', 40);
- for (i = 0;;i++) {
- unsigned char c = name[i];
- unsigned char val;
- if (!c || i > 40)
- break;
- if (c >= '0' && c <= '9')
- val = c - '0';
- else if (c >= 'a' && c <= 'f')
- val = c - 'a' + 10;
- else if (c >= 'A' && c <='F') {
- val = c - 'A' + 10;
- c -= 'A' - 'a';
- }
- else
- return -1;
- canonical[i] = c;
- if (!(i & 1))
- val <<= 4;
- res[i >> 1] |= val;
- }
- if (i < 4)
- return -1;
- if (find_short_object_filename(i, canonical, sha1))
- return 0;
- if (find_short_packed_object(i, res, sha1))
- return 0;
- return -1;
+ show_rev(NORMAL, sha1, refname);
+ return 0;
}
-/*
- * This is like "get_sha1()", except it allows "sha1 expressions",
- * notably "xyz^" for "parent of xyz"
- */
-static int get_extended_sha1(char *name, unsigned char *sha1)
+static void show_datestring(const char *flag, const char *datestr)
{
- int parent, ret;
- int len = strlen(name);
+ static char buffer[100];
- parent = 1;
- if (len > 2 && name[len-1] >= '0' && name[len-1] <= '9') {
- parent = name[len-1] - '0';
- len--;
- }
- if (len > 1 && name[len-1] == '^') {
- name[len-1] = 0;
- ret = get_parent(name, sha1, parent);
- name[len-1] = '^';
- if (!ret)
- return 0;
- }
- ret = get_sha1(name, sha1);
- if (!ret)
- return 0;
- return get_short_sha1(name, sha1);
+ /* date handling requires both flags and revs */
+ if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
+ return;
+ snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
+ show(buffer);
}
-static void show_default(void)
+static int show_file(const char *arg)
{
- char *s = def;
-
- if (s) {
- unsigned char sha1[20];
-
- def = NULL;
- if (!get_extended_sha1(s, sha1)) {
- show_rev(NORMAL, sha1);
- return;
- }
- show_arg(s);
+ show_default();
+ if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
+ show(arg);
+ return 1;
}
-}
-
-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;
+ int i, as_is = 0, verify = 0;
unsigned char sha1[20];
-
+ const char *prefix = setup_git_directory();
+
for (i = 1; i < argc; i++) {
+ struct stat st;
char *arg = argv[i];
char *dotdot;
if (as_is) {
- show_norev(arg);
+ show_file(arg);
+ continue;
+ }
+ if (!strcmp(arg,"-n")) {
+ if (++i >= argc)
+ die("-n requires an argument");
+ if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
+ show(arg);
+ show(argv[i]);
+ }
+ continue;
+ }
+ if (!strncmp(arg,"-n",2)) {
+ if ((filter & DO_FLAGS) && (filter & DO_REVS))
+ show(arg);
continue;
}
+
if (*arg == '-') {
if (!strcmp(arg, "--")) {
- show_default();
- if (revs_only)
- break;
as_is = 1;
+ /* Pass on the "--" if we show anything but files.. */
+ if (filter & (DO_FLAGS | DO_REVS))
+ show_file(arg);
+ continue;
}
if (!strcmp(arg, "--default")) {
def = argv[i+1];
continue;
}
if (!strcmp(arg, "--revs-only")) {
- revs_only = 1;
+ filter &= ~DO_NOREV;
continue;
}
if (!strcmp(arg, "--no-revs")) {
- no_revs = 1;
+ filter &= ~DO_REVS;
continue;
}
if (!strcmp(arg, "--flags")) {
- flags_only = 1;
+ filter &= ~DO_NONFLAGS;
continue;
}
if (!strcmp(arg, "--no-flags")) {
- no_flags = 1;
+ filter &= ~DO_FLAGS;
continue;
}
if (!strcmp(arg, "--verify")) {
- revs_only = 1;
- do_rev_argument = 0;
- single_rev = 1;
+ filter &= ~(DO_FLAGS|DO_NOREV);
+ verify = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--short") ||
+ !strncmp(arg, "--short=", 8)) {
+ filter &= ~(DO_FLAGS|DO_NOREV);
+ verify = 1;
+ abbrev = DEFAULT_ABBREV;
+ if (arg[7] == '=')
+ abbrev = strtoul(arg + 8, NULL, 10);
+ if (abbrev < MINIMUM_ABBREV)
+ abbrev = MINIMUM_ABBREV;
+ else if (40 <= abbrev)
+ abbrev = 40;
+ continue;
+ }
+ if (!strcmp(arg, "--sq")) {
+ output_sq = 1;
continue;
}
if (!strcmp(arg, "--not")) {
show_type ^= REVERSED;
continue;
}
+ if (!strcmp(arg, "--symbolic")) {
+ symbolic = 1;
+ continue;
+ }
if (!strcmp(arg, "--all")) {
for_each_ref(show_reference);
continue;
}
- show_arg(arg);
+ if (!strcmp(arg, "--show-prefix")) {
+ if (prefix)
+ puts(prefix);
+ continue;
+ }
+ if (!strcmp(arg, "--show-cdup")) {
+ const char *pfx = prefix;
+ while (pfx) {
+ pfx = strchr(pfx, '/');
+ if (pfx) {
+ pfx++;
+ printf("../");
+ }
+ }
+ putchar('\n');
+ continue;
+ }
+ if (!strcmp(arg, "--git-dir")) {
+ const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
+ static char cwd[PATH_MAX];
+ if (gitdir) {
+ puts(gitdir);
+ continue;
+ }
+ if (!prefix) {
+ puts(".git");
+ continue;
+ }
+ if (!getcwd(cwd, PATH_MAX))
+ die("unable to get current working directory");
+ printf("%s/.git\n", cwd);
+ continue;
+ }
+ if (!strncmp(arg, "--since=", 8)) {
+ show_datestring("--max-age=", arg+8);
+ continue;
+ }
+ if (!strncmp(arg, "--after=", 8)) {
+ show_datestring("--max-age=", arg+8);
+ continue;
+ }
+ if (!strncmp(arg, "--before=", 9)) {
+ show_datestring("--min-age=", arg+9);
+ continue;
+ }
+ if (!strncmp(arg, "--until=", 8)) {
+ show_datestring("--min-age=", arg+8);
+ continue;
+ }
+ if (show_flag(arg) && verify)
+ die("Needed a single revision");
continue;
}
+
+ /* Not a flag argument */
dotdot = strstr(arg, "..");
if (dotdot) {
unsigned char end[20];
char *n = dotdot+2;
*dotdot = 0;
- if (!get_extended_sha1(arg, sha1)) {
+ if (!get_sha1(arg, sha1)) {
if (!*n)
n = "HEAD";
- if (!get_extended_sha1(n, end)) {
- if (no_revs)
- continue;
- def = NULL;
- show_rev(NORMAL, end);
- show_rev(REVERSED, sha1);
+ if (!get_sha1(n, end)) {
+ show_rev(NORMAL, end, n);
+ show_rev(REVERSED, sha1, arg);
continue;
}
}
*dotdot = '.';
}
- if (!get_extended_sha1(arg, sha1)) {
- if (no_revs)
- continue;
- def = NULL;
- show_rev(NORMAL, sha1);
+ if (!get_sha1(arg, sha1)) {
+ show_rev(NORMAL, sha1, arg);
continue;
}
- if (*arg == '^' && !get_extended_sha1(arg+1, sha1)) {
- if (no_revs)
- continue;
- def = NULL;
- show_rev(REVERSED, sha1);
+ if (*arg == '^' && !get_sha1(arg+1, sha1)) {
+ show_rev(REVERSED, sha1, arg+1);
continue;
}
- show_default();
- show_norev(arg);
+ as_is = 1;
+ if (!show_file(arg))
+ continue;
+ if (verify)
+ die("Needed a single revision");
+ if (lstat(arg, &st) < 0)
+ die("'%s': %s", arg, strerror(errno));
}
show_default();
- if (single_rev && output_revs != 1) {
- fprintf(stderr, "Needed a single revision\n");
- exit(1);
- }
+ if (verify && revs_count != 1)
+ die("Needed a single revision");
return 0;
}