diff options
Diffstat (limited to 'rev-parse.c')
| -rw-r--r-- | rev-parse.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/rev-parse.c b/rev-parse.c new file mode 100644 index 0000000000..f1f5163447 --- /dev/null +++ b/rev-parse.c @@ -0,0 +1,248 @@ +/* + * rev-parse.c + * + * Copyright (C) Linus Torvalds, 2005 + */ +#include "cache.h" +#include "commit.h" +#include "refs.h" + +static char *def = NULL; +static int no_revs = 0; +static int single_rev = 0; +static int revs_only = 0; +static int do_rev_argument = 1; +static int output_revs = 0; +static int flags_only = 0; +static int no_flags = 0; +static int output_sq = 0; +static int symbolic = 0; + +#define NORMAL 0 +#define REVERSED 1 +static int show_type = NORMAL; + +/* + * Some arguments are relevant "revision" arguments, + * others are about output format or other details. + * This sorts it all out. + */ +static int is_rev_argument(const char *arg) +{ + static const char *rev_args[] = { + "--max-count=", + "--max-age=", + "--min-age=", + "--merge-order", + "--topo-order", + "--bisect", + "--no-merges", + NULL + }; + const char **p = rev_args; + + for (;;) { + const char *str = *p++; + int len; + if (!str) + return 0; + len = strlen(str); + if (!strncmp(arg, str, len)) + return 1; + } +} + +static void show(const char *arg) +{ + if (output_sq) { + int sq = '\'', ch; + + putchar(sq); + while ((ch = *arg++)) { + if (ch == sq) + fputs("'\\'", stdout); + putchar(ch); + } + putchar(sq); + putchar(' '); + } + else + puts(arg); +} + +static void show_rev(int type, const unsigned char *sha1, const char *name) +{ + if (no_revs) + return; + output_revs++; + + if (type != show_type) + putchar('^'); + if (symbolic && name) + show(name); + else + show(sha1_to_hex(sha1)); +} + +static void show_rev_arg(char *rev) +{ + if (no_revs) + return; + show(rev); +} + +static void show_norev(char *norev) +{ + if (flags_only) + return; + if (revs_only) + return; + show(norev); +} + +static void show_arg(char *arg) +{ + if (no_flags) + return; + if (do_rev_argument && is_rev_argument(arg)) + show_rev_arg(arg); + else + show_norev(arg); +} + +static void show_default(void) +{ + char *s = def; + + if (s) { + unsigned char sha1[20]; + + def = NULL; + if (!get_sha1(s, sha1)) { + show_rev(NORMAL, sha1, s); + return; + } + show_arg(s); + } +} + +static int show_reference(const char *refname, const unsigned char *sha1) +{ + show_rev(NORMAL, sha1, refname); + return 0; +} + +int main(int argc, char **argv) +{ + int i, as_is = 0; + unsigned char sha1[20]; + const char *prefix = setup_git_directory(); + + for (i = 1; i < argc; i++) { + char *arg = argv[i]; + char *dotdot; + + if (as_is) { + show_norev(arg); + continue; + } + if (*arg == '-') { + if (!strcmp(arg, "--")) { + show_default(); + if (revs_only) + break; + as_is = 1; + } + if (!strcmp(arg, "--default")) { + def = argv[i+1]; + i++; + continue; + } + if (!strcmp(arg, "--revs-only")) { + revs_only = 1; + continue; + } + if (!strcmp(arg, "--no-revs")) { + no_revs = 1; + continue; + } + if (!strcmp(arg, "--flags")) { + flags_only = 1; + continue; + } + if (!strcmp(arg, "--no-flags")) { + no_flags = 1; + continue; + } + if (!strcmp(arg, "--verify")) { + revs_only = 1; + do_rev_argument = 0; + single_rev = 1; + continue; + } + if (!strcmp(arg, "--sq")) { + output_sq = 1; + continue; + } + if (!strcmp(arg, "--not")) { + show_type ^= REVERSED; + continue; + } + if (!strcmp(arg, "--symbolic")) { + symbolic = 1; + continue; + } + if (!strcmp(arg, "--all")) { + for_each_ref(show_reference); + continue; + } + if (!strcmp(arg, "--show-prefix")) { + puts(prefix); + continue; + } + show_arg(arg); + continue; + } + dotdot = strstr(arg, ".."); + if (dotdot) { + unsigned char end[20]; + char *n = dotdot+2; + *dotdot = 0; + if (!get_sha1(arg, sha1)) { + if (!*n) + n = "HEAD"; + if (!get_sha1(n, end)) { + if (no_revs) + continue; + def = NULL; + show_rev(NORMAL, end, n); + show_rev(REVERSED, sha1, arg); + continue; + } + } + *dotdot = '.'; + } + if (!get_sha1(arg, sha1)) { + if (no_revs) + continue; + def = NULL; + show_rev(NORMAL, sha1, arg); + continue; + } + if (*arg == '^' && !get_sha1(arg+1, sha1)) { + if (no_revs) + continue; + def = NULL; + show_rev(REVERSED, sha1, arg+1); + continue; + } + show_default(); + show_norev(arg); + } + show_default(); + if (single_rev && output_revs != 1) { + fprintf(stderr, "Needed a single revision\n"); + exit(1); + } + return 0; +} |