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* lt/deepen-builtin-source: Move 'builtin-*' into a 'builtin/' subdirectory Conflicts: Makefile
734 lines
16 KiB
C
734 lines
16 KiB
C
/*
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* rev-parse.c
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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#include "commit.h"
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#include "refs.h"
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#include "quote.h"
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#include "builtin.h"
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#include "parse-options.h"
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#define DO_REVS 1
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#define DO_NOREV 2
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#define DO_FLAGS 4
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#define DO_NONFLAGS 8
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static int filter = ~0;
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static const char *def;
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#define NORMAL 0
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#define REVERSED 1
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static int show_type = NORMAL;
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#define SHOW_SYMBOLIC_ASIS 1
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#define SHOW_SYMBOLIC_FULL 2
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static int symbolic;
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static int abbrev;
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static int abbrev_ref;
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static int abbrev_ref_strict;
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static int output_sq;
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/*
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* Some arguments are relevant "revision" arguments,
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* others are about output format or other details.
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* This sorts it all out.
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*/
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static int is_rev_argument(const char *arg)
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{
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static const char *rev_args[] = {
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"--all",
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"--bisect",
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"--dense",
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"--branches=",
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"--branches",
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"--header",
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"--max-age=",
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"--max-count=",
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"--min-age=",
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"--no-merges",
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"--objects",
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"--objects-edge",
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"--parents",
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"--pretty",
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"--remotes=",
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"--remotes",
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"--glob=",
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"--sparse",
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"--tags=",
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"--tags",
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"--topo-order",
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"--date-order",
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"--unpacked",
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NULL
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};
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const char **p = rev_args;
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/* accept -<digit>, like traditional "head" */
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if ((*arg == '-') && isdigit(arg[1]))
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return 1;
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for (;;) {
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const char *str = *p++;
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int len;
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if (!str)
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return 0;
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len = strlen(str);
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if (!strcmp(arg, str) ||
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(str[len-1] == '=' && !strncmp(arg, str, len)))
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return 1;
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}
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}
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/* Output argument as a string, either SQ or normal */
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static void show(const char *arg)
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{
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if (output_sq) {
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int sq = '\'', ch;
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putchar(sq);
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while ((ch = *arg++)) {
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if (ch == sq)
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fputs("'\\'", stdout);
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putchar(ch);
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}
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putchar(sq);
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putchar(' ');
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}
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else
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puts(arg);
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}
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/* Like show(), but with a negation prefix according to type */
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static void show_with_type(int type, const char *arg)
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{
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if (type != show_type)
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putchar('^');
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show(arg);
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}
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/* Output a revision, only if filter allows it */
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static void show_rev(int type, const unsigned char *sha1, const char *name)
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{
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if (!(filter & DO_REVS))
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return;
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def = NULL;
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if ((symbolic || abbrev_ref) && name) {
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if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
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unsigned char discard[20];
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char *full;
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switch (dwim_ref(name, strlen(name), discard, &full)) {
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case 0:
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/*
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* Not found -- not a ref. We could
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* emit "name" here, but symbolic-full
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* users are interested in finding the
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* refs spelled in full, and they would
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* need to filter non-refs if we did so.
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*/
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break;
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case 1: /* happy */
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if (abbrev_ref)
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full = shorten_unambiguous_ref(full,
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abbrev_ref_strict);
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show_with_type(type, full);
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break;
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default: /* ambiguous */
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error("refname '%s' is ambiguous", name);
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break;
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}
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} else {
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show_with_type(type, name);
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}
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}
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else if (abbrev)
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show_with_type(type, find_unique_abbrev(sha1, abbrev));
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else
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show_with_type(type, sha1_to_hex(sha1));
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}
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/* Output a flag, only if filter allows it. */
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static int show_flag(const char *arg)
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{
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if (!(filter & DO_FLAGS))
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return 0;
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if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
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show(arg);
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return 1;
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}
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return 0;
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}
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static int show_default(void)
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{
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const char *s = def;
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if (s) {
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unsigned char sha1[20];
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def = NULL;
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if (!get_sha1(s, sha1)) {
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show_rev(NORMAL, sha1, s);
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return 1;
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}
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}
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return 0;
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}
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static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
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{
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show_rev(NORMAL, sha1, refname);
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return 0;
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}
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static int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
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{
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show_rev(REVERSED, sha1, refname);
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return 0;
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}
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static void show_datestring(const char *flag, const char *datestr)
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{
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static char buffer[100];
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/* date handling requires both flags and revs */
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if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
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return;
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snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
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show(buffer);
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}
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static int show_file(const char *arg)
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{
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show_default();
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if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
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show(arg);
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return 1;
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}
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return 0;
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}
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static int try_difference(const char *arg)
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{
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char *dotdot;
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unsigned char sha1[20];
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unsigned char end[20];
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const char *next;
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const char *this;
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int symmetric;
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if (!(dotdot = strstr(arg, "..")))
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return 0;
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next = dotdot + 2;
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this = arg;
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symmetric = (*next == '.');
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*dotdot = 0;
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next += symmetric;
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if (!*next)
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next = "HEAD";
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if (dotdot == arg)
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this = "HEAD";
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if (!get_sha1(this, sha1) && !get_sha1(next, end)) {
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show_rev(NORMAL, end, next);
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show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
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if (symmetric) {
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struct commit_list *exclude;
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struct commit *a, *b;
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a = lookup_commit_reference(sha1);
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b = lookup_commit_reference(end);
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exclude = get_merge_bases(a, b, 1);
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while (exclude) {
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struct commit_list *n = exclude->next;
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show_rev(REVERSED,
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exclude->item->object.sha1,NULL);
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free(exclude);
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exclude = n;
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}
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}
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return 1;
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}
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*dotdot = '.';
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return 0;
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}
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static int try_parent_shorthands(const char *arg)
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{
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char *dotdot;
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unsigned char sha1[20];
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struct commit *commit;
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struct commit_list *parents;
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int parents_only;
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if ((dotdot = strstr(arg, "^!")))
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parents_only = 0;
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else if ((dotdot = strstr(arg, "^@")))
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parents_only = 1;
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if (!dotdot || dotdot[2])
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return 0;
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*dotdot = 0;
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if (get_sha1(arg, sha1))
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return 0;
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if (!parents_only)
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show_rev(NORMAL, sha1, arg);
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commit = lookup_commit_reference(sha1);
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for (parents = commit->parents; parents; parents = parents->next)
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show_rev(parents_only ? NORMAL : REVERSED,
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parents->item->object.sha1, arg);
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return 1;
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}
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static int parseopt_dump(const struct option *o, const char *arg, int unset)
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{
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struct strbuf *parsed = o->value;
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if (unset)
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strbuf_addf(parsed, " --no-%s", o->long_name);
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else if (o->short_name)
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strbuf_addf(parsed, " -%c", o->short_name);
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else
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strbuf_addf(parsed, " --%s", o->long_name);
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if (arg) {
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strbuf_addch(parsed, ' ');
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sq_quote_buf(parsed, arg);
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}
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return 0;
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}
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static const char *skipspaces(const char *s)
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{
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while (isspace(*s))
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s++;
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return s;
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}
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static int cmd_parseopt(int argc, const char **argv, const char *prefix)
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{
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static int keep_dashdash = 0, stop_at_non_option = 0;
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static char const * const parseopt_usage[] = {
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"git rev-parse --parseopt [options] -- [<args>...]",
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NULL
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};
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static struct option parseopt_opts[] = {
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OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
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"keep the `--` passed as an arg"),
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OPT_BOOLEAN(0, "stop-at-non-option", &stop_at_non_option,
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"stop parsing after the "
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"first non-option argument"),
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OPT_END(),
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};
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struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
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const char **usage = NULL;
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struct option *opts = NULL;
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int onb = 0, osz = 0, unb = 0, usz = 0;
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strbuf_addstr(&parsed, "set --");
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argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
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PARSE_OPT_KEEP_DASHDASH);
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if (argc < 1 || strcmp(argv[0], "--"))
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usage_with_options(parseopt_usage, parseopt_opts);
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/* get the usage up to the first line with a -- on it */
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for (;;) {
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if (strbuf_getline(&sb, stdin, '\n') == EOF)
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die("premature end of input");
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ALLOC_GROW(usage, unb + 1, usz);
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if (!strcmp("--", sb.buf)) {
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if (unb < 1)
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die("no usage string given before the `--' separator");
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usage[unb] = NULL;
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break;
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}
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usage[unb++] = strbuf_detach(&sb, NULL);
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}
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/* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
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while (strbuf_getline(&sb, stdin, '\n') != EOF) {
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const char *s;
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struct option *o;
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if (!sb.len)
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continue;
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ALLOC_GROW(opts, onb + 1, osz);
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memset(opts + onb, 0, sizeof(opts[onb]));
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o = &opts[onb++];
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s = strchr(sb.buf, ' ');
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if (!s || *sb.buf == ' ') {
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o->type = OPTION_GROUP;
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o->help = xstrdup(skipspaces(sb.buf));
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continue;
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}
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o->type = OPTION_CALLBACK;
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o->help = xstrdup(skipspaces(s));
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o->value = &parsed;
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o->flags = PARSE_OPT_NOARG;
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o->callback = &parseopt_dump;
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while (s > sb.buf && strchr("*=?!", s[-1])) {
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switch (*--s) {
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case '=':
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o->flags &= ~PARSE_OPT_NOARG;
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break;
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case '?':
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o->flags &= ~PARSE_OPT_NOARG;
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o->flags |= PARSE_OPT_OPTARG;
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break;
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case '!':
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o->flags |= PARSE_OPT_NONEG;
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break;
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case '*':
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o->flags |= PARSE_OPT_HIDDEN;
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break;
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}
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}
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if (s - sb.buf == 1) /* short option only */
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o->short_name = *sb.buf;
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else if (sb.buf[1] != ',') /* long option only */
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o->long_name = xmemdupz(sb.buf, s - sb.buf);
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else {
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o->short_name = *sb.buf;
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o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
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}
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}
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strbuf_release(&sb);
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/* put an OPT_END() */
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ALLOC_GROW(opts, onb + 1, osz);
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memset(opts + onb, 0, sizeof(opts[onb]));
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argc = parse_options(argc, argv, prefix, opts, usage,
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keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0 |
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stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0);
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strbuf_addf(&parsed, " --");
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sq_quote_argv(&parsed, argv, 0);
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puts(parsed.buf);
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return 0;
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}
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static int cmd_sq_quote(int argc, const char **argv)
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{
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struct strbuf buf = STRBUF_INIT;
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if (argc)
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sq_quote_argv(&buf, argv, 0);
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printf("%s\n", buf.buf);
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strbuf_release(&buf);
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return 0;
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}
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static void die_no_single_rev(int quiet)
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{
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if (quiet)
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exit(1);
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else
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die("Needed a single revision");
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}
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static const char builtin_rev_parse_usage[] =
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"git rev-parse --parseopt [options] -- [<args>...]\n"
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" or: git rev-parse --sq-quote [<arg>...]\n"
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" or: git rev-parse [options] [<arg>...]\n"
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"\n"
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"Run \"git rev-parse --parseopt -h\" for more information on the first usage.";
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int cmd_rev_parse(int argc, const char **argv, const char *prefix)
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{
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int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
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unsigned char sha1[20];
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const char *name = NULL;
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if (argc > 1 && !strcmp("--parseopt", argv[1]))
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return cmd_parseopt(argc - 1, argv + 1, prefix);
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if (argc > 1 && !strcmp("--sq-quote", argv[1]))
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return cmd_sq_quote(argc - 2, argv + 2);
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if (argc == 2 && !strcmp("--local-env-vars", argv[1])) {
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int i;
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for (i = 0; local_repo_env[i]; i++)
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printf("%s\n", local_repo_env[i]);
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return 0;
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}
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if (argc > 1 && !strcmp("-h", argv[1]))
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usage(builtin_rev_parse_usage);
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prefix = setup_git_directory();
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git_config(git_default_config, NULL);
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (as_is) {
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if (show_file(arg) && as_is < 2)
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verify_filename(prefix, arg);
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continue;
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}
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if (!strcmp(arg,"-n")) {
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if (++i >= argc)
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die("-n requires an argument");
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if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
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show(arg);
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show(argv[i]);
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}
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continue;
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}
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if (!prefixcmp(arg, "-n")) {
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if ((filter & DO_FLAGS) && (filter & DO_REVS))
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show(arg);
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continue;
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}
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if (*arg == '-') {
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if (!strcmp(arg, "--")) {
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as_is = 2;
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/* Pass on the "--" if we show anything but files.. */
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if (filter & (DO_FLAGS | DO_REVS))
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show_file(arg);
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continue;
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}
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if (!strcmp(arg, "--default")) {
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def = argv[i+1];
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i++;
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continue;
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}
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if (!strcmp(arg, "--revs-only")) {
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filter &= ~DO_NOREV;
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continue;
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}
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if (!strcmp(arg, "--no-revs")) {
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filter &= ~DO_REVS;
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continue;
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}
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if (!strcmp(arg, "--flags")) {
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filter &= ~DO_NONFLAGS;
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continue;
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}
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if (!strcmp(arg, "--no-flags")) {
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filter &= ~DO_FLAGS;
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continue;
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}
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if (!strcmp(arg, "--verify")) {
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filter &= ~(DO_FLAGS|DO_NOREV);
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verify = 1;
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continue;
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}
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if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
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quiet = 1;
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continue;
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}
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if (!strcmp(arg, "--short") ||
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!prefixcmp(arg, "--short=")) {
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filter &= ~(DO_FLAGS|DO_NOREV);
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verify = 1;
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abbrev = DEFAULT_ABBREV;
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if (arg[7] == '=')
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abbrev = strtoul(arg + 8, NULL, 10);
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if (abbrev < MINIMUM_ABBREV)
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abbrev = MINIMUM_ABBREV;
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else if (40 <= abbrev)
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abbrev = 40;
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continue;
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}
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if (!strcmp(arg, "--sq")) {
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output_sq = 1;
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|
continue;
|
|
}
|
|
if (!strcmp(arg, "--not")) {
|
|
show_type ^= REVERSED;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--symbolic")) {
|
|
symbolic = SHOW_SYMBOLIC_ASIS;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--symbolic-full-name")) {
|
|
symbolic = SHOW_SYMBOLIC_FULL;
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--abbrev-ref") &&
|
|
(!arg[12] || arg[12] == '=')) {
|
|
abbrev_ref = 1;
|
|
abbrev_ref_strict = warn_ambiguous_refs;
|
|
if (arg[12] == '=') {
|
|
if (!strcmp(arg + 13, "strict"))
|
|
abbrev_ref_strict = 1;
|
|
else if (!strcmp(arg + 13, "loose"))
|
|
abbrev_ref_strict = 0;
|
|
else
|
|
die("unknown mode for %s", arg);
|
|
}
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--all")) {
|
|
for_each_ref(show_reference, NULL);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--bisect")) {
|
|
for_each_ref_in("refs/bisect/bad", show_reference, NULL);
|
|
for_each_ref_in("refs/bisect/good", anti_reference, NULL);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--branches=")) {
|
|
for_each_glob_ref_in(show_reference, arg + 11,
|
|
"refs/heads/", NULL);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--branches")) {
|
|
for_each_branch_ref(show_reference, NULL);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--tags=")) {
|
|
for_each_glob_ref_in(show_reference, arg + 7,
|
|
"refs/tags/", NULL);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--tags")) {
|
|
for_each_tag_ref(show_reference, NULL);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--glob=")) {
|
|
for_each_glob_ref(show_reference, arg + 7, NULL);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--remotes=")) {
|
|
for_each_glob_ref_in(show_reference, arg + 10,
|
|
"refs/remotes/", NULL);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--remotes")) {
|
|
for_each_remote_ref(show_reference, NULL);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--show-toplevel")) {
|
|
const char *work_tree = get_git_work_tree();
|
|
if (work_tree)
|
|
puts(work_tree);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--show-prefix")) {
|
|
if (prefix)
|
|
puts(prefix);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--show-cdup")) {
|
|
const char *pfx = prefix;
|
|
if (!is_inside_work_tree()) {
|
|
const char *work_tree =
|
|
get_git_work_tree();
|
|
if (work_tree)
|
|
printf("%s\n", work_tree);
|
|
continue;
|
|
}
|
|
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];
|
|
int len;
|
|
if (gitdir) {
|
|
puts(gitdir);
|
|
continue;
|
|
}
|
|
if (!prefix) {
|
|
puts(".git");
|
|
continue;
|
|
}
|
|
if (!getcwd(cwd, PATH_MAX))
|
|
die_errno("unable to get current working directory");
|
|
len = strlen(cwd);
|
|
printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--is-inside-git-dir")) {
|
|
printf("%s\n", is_inside_git_dir() ? "true"
|
|
: "false");
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--is-inside-work-tree")) {
|
|
printf("%s\n", is_inside_work_tree() ? "true"
|
|
: "false");
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--is-bare-repository")) {
|
|
printf("%s\n", is_bare_repository() ? "true"
|
|
: "false");
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--since=")) {
|
|
show_datestring("--max-age=", arg+8);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--after=")) {
|
|
show_datestring("--max-age=", arg+8);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--before=")) {
|
|
show_datestring("--min-age=", arg+9);
|
|
continue;
|
|
}
|
|
if (!prefixcmp(arg, "--until=")) {
|
|
show_datestring("--min-age=", arg+8);
|
|
continue;
|
|
}
|
|
if (show_flag(arg) && verify)
|
|
die_no_single_rev(quiet);
|
|
continue;
|
|
}
|
|
|
|
/* Not a flag argument */
|
|
if (try_difference(arg))
|
|
continue;
|
|
if (try_parent_shorthands(arg))
|
|
continue;
|
|
name = arg;
|
|
type = NORMAL;
|
|
if (*arg == '^') {
|
|
name++;
|
|
type = REVERSED;
|
|
}
|
|
if (!get_sha1(name, sha1)) {
|
|
if (verify)
|
|
revs_count++;
|
|
else
|
|
show_rev(type, sha1, name);
|
|
continue;
|
|
}
|
|
if (verify)
|
|
die_no_single_rev(quiet);
|
|
as_is = 1;
|
|
if (!show_file(arg))
|
|
continue;
|
|
verify_filename(prefix, arg);
|
|
}
|
|
if (verify) {
|
|
if (revs_count == 1) {
|
|
show_rev(type, sha1, name);
|
|
return 0;
|
|
} else if (revs_count == 0 && show_default())
|
|
return 0;
|
|
die_no_single_rev(quiet);
|
|
} else
|
|
show_default();
|
|
return 0;
|
|
}
|