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348 lines
6.7 KiB
348 lines
6.7 KiB
/* |
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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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#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 char *def = NULL; |
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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 = 0; |
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static int abbrev = 0; |
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static int output_sq = 0; |
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static int revs_count = 0; |
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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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"--header", |
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"--max-age=", |
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"--max-count=", |
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"--merge-order", |
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"--min-age=", |
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"--no-merges", |
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"--objects", |
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"--parents", |
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"--pretty", |
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"--show-breaks", |
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"--sparse", |
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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(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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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) |
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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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int main(int argc, char **argv) |
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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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const char *prefix = setup_git_directory(); |
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for (i = 1; i < argc; i++) { |
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struct stat st; |
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char *arg = argv[i]; |
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char *dotdot; |
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if (as_is) { |
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show_file(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 (!strncmp(arg,"-n",2)) { |
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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 = 1; |
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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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!strncmp(arg, "--short=", 9)) { |
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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[8] == '=') |
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abbrev = strtoul(arg + 9, 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); |
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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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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 (!strncmp(arg, "--since=", 8)) { |
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show_datestring("--max-age=", arg+8); |
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continue; |
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} |
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if (!strncmp(arg, "--after=", 8)) { |
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show_datestring("--max-age=", arg+8); |
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continue; |
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} |
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if (!strncmp(arg, "--before=", 9)) { |
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show_datestring("--min-age=", arg+9); |
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continue; |
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} |
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if (!strncmp(arg, "--until=", 8)) { |
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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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dotdot = strstr(arg, ".."); |
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if (dotdot) { |
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unsigned char end[20]; |
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char *n = dotdot+2; |
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*dotdot = 0; |
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if (!get_sha1(arg, sha1)) { |
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if (!*n) |
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n = "HEAD"; |
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if (!get_sha1(n, end)) { |
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show_rev(NORMAL, end, n); |
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show_rev(REVERSED, sha1, arg); |
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continue; |
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} |
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} |
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*dotdot = '.'; |
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} |
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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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if (lstat(arg, &st) < 0) |
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die("'%s': %s", arg, strerror(errno)); |
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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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