зеркало из https://github.com/microsoft/git.git
542 строки
11 KiB
C
542 строки
11 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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static int symbolic;
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static int abbrev;
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static int output_sq;
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static int revs_count;
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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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"--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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"--sparse",
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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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/* 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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revs_count++;
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if (type != show_type)
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putchar('^');
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if (symbolic && name)
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show(name);
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else if (abbrev)
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show(find_unique_abbrev(sha1, abbrev));
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else
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show(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 void 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;
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}
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}
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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 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 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;
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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_END(),
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};
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struct strbuf sb, parsed;
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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_init(&parsed, 0);
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strbuf_addstr(&parsed, "set --");
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argc = parse_options(argc, argv, 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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strbuf_init(&sb, 0);
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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(s));
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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->callback = &parseopt_dump;
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switch (s[-1]) {
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case '=':
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s--;
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break;
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case '?':
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o->flags = PARSE_OPT_OPTARG;
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s--;
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break;
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default:
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o->flags = PARSE_OPT_NOARG;
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break;
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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, opts, usage,
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keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0);
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strbuf_addf(&parsed, " --");
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sq_quote_argv(&parsed, argv, argc, 0);
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puts(parsed.buf);
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return 0;
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}
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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;
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unsigned char sha1[20];
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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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prefix = setup_git_directory();
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git_config(git_default_config);
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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, "--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;
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}
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if (!strcmp(arg, "--not")) {
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show_type ^= REVERSED;
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continue;
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}
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if (!strcmp(arg, "--symbolic")) {
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symbolic = 1;
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continue;
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}
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if (!strcmp(arg, "--all")) {
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for_each_ref(show_reference, NULL);
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continue;
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}
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if (!strcmp(arg, "--branches")) {
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for_each_branch_ref(show_reference, NULL);
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continue;
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}
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if (!strcmp(arg, "--tags")) {
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for_each_tag_ref(show_reference, NULL);
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continue;
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}
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if (!strcmp(arg, "--remotes")) {
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for_each_remote_ref(show_reference, NULL);
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continue;
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}
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if (!strcmp(arg, "--show-prefix")) {
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if (prefix)
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puts(prefix);
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continue;
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}
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if (!strcmp(arg, "--show-cdup")) {
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const char *pfx = prefix;
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if (!is_inside_work_tree()) {
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const char *work_tree =
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get_git_work_tree();
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if (work_tree)
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printf("%s\n", work_tree);
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continue;
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}
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while (pfx) {
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pfx = strchr(pfx, '/');
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if (pfx) {
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pfx++;
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printf("../");
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}
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}
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putchar('\n');
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continue;
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}
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if (!strcmp(arg, "--git-dir")) {
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const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
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static char cwd[PATH_MAX];
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if (gitdir) {
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puts(gitdir);
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continue;
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}
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if (!prefix) {
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puts(".git");
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continue;
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}
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if (!getcwd(cwd, PATH_MAX))
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die("unable to get current working directory");
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printf("%s/.git\n", cwd);
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continue;
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}
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if (!strcmp(arg, "--is-inside-git-dir")) {
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printf("%s\n", is_inside_git_dir() ? "true"
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: "false");
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continue;
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}
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if (!strcmp(arg, "--is-inside-work-tree")) {
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printf("%s\n", is_inside_work_tree() ? "true"
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: "false");
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continue;
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}
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if (!strcmp(arg, "--is-bare-repository")) {
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printf("%s\n", is_bare_repository() ? "true"
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: "false");
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continue;
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}
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if (!prefixcmp(arg, "--since=")) {
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show_datestring("--max-age=", arg+8);
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continue;
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}
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if (!prefixcmp(arg, "--after=")) {
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show_datestring("--max-age=", arg+8);
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continue;
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}
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if (!prefixcmp(arg, "--before=")) {
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show_datestring("--min-age=", arg+9);
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continue;
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}
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if (!prefixcmp(arg, "--until=")) {
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show_datestring("--min-age=", arg+8);
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continue;
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}
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if (show_flag(arg) && verify)
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die("Needed a single revision");
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continue;
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}
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/* Not a flag argument */
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if (try_difference(arg))
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continue;
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if (!get_sha1(arg, sha1)) {
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show_rev(NORMAL, sha1, arg);
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continue;
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}
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if (*arg == '^' && !get_sha1(arg+1, sha1)) {
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show_rev(REVERSED, sha1, arg+1);
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continue;
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}
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as_is = 1;
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if (!show_file(arg))
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continue;
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if (verify)
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die("Needed a single revision");
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verify_filename(prefix, arg);
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}
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show_default();
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if (verify && revs_count != 1)
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die("Needed a single revision");
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return 0;
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}
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