diff options
Diffstat (limited to 'diff-helper.c')
| -rw-r--r-- | diff-helper.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/diff-helper.c b/diff-helper.c new file mode 100644 index 0000000000..3fa50ee75b --- /dev/null +++ b/diff-helper.c @@ -0,0 +1,154 @@ +/* + * Copyright (C) 2005 Junio C Hamano + */ +#include "cache.h" +#include "strbuf.h" +#include "diff.h" + +static const char *pickaxe = NULL; +static int pickaxe_opts = 0; +static const char *orderfile = NULL; +static const char *diff_filter = NULL; +static int line_termination = '\n'; +static int inter_name_termination = '\t'; + +static void flush_them(int ac, const char **av) +{ + diffcore_std_no_resolve(av + 1, + pickaxe, pickaxe_opts, + orderfile, diff_filter); + diff_flush(DIFF_FORMAT_PATCH, '\n'); +} + +static const char diff_helper_usage[] = +"git-diff-helper [-z] [-O<orderfile>] [-S<string>] [--pickaxe-all] [<path>...]"; + +int main(int ac, const char **av) { + struct strbuf sb; + const char *garbage_flush_format; + + strbuf_init(&sb); + + while (1 < ac && av[1][0] == '-') { + if (av[1][1] == 'z') + line_termination = inter_name_termination = 0; + else if (av[1][1] == 'S') { + pickaxe = av[1] + 2; + } + else if (!strcmp(av[1], "--pickaxe-all")) + pickaxe_opts = DIFF_PICKAXE_ALL; + else if (!strncmp(av[1], "--diff-filter=", 14)) + diff_filter = av[1] + 14; + else if (!strncmp(av[1], "-O", 2)) + orderfile = av[1] + 2; + else + usage(diff_helper_usage); + ac--; av++; + } + garbage_flush_format = (line_termination == 0) ? "%s" : "%s\n"; + + /* the remaining parameters are paths patterns */ + + diff_setup(0); + while (1) { + unsigned old_mode, new_mode; + unsigned char old_sha1[20], new_sha1[20]; + char old_path[PATH_MAX]; + int status, score, two_paths; + char new_path[PATH_MAX]; + + int ch; + char *cp, *ep; + + read_line(&sb, stdin, line_termination); + if (sb.eof) + break; + switch (sb.buf[0]) { + case ':': + /* parse the first part up to the status */ + cp = sb.buf + 1; + old_mode = new_mode = 0; + while ((ch = *cp) && ('0' <= ch && ch <= '7')) { + old_mode = (old_mode << 3) | (ch - '0'); + cp++; + } + if (*cp++ != ' ') + break; + while ((ch = *cp) && ('0' <= ch && ch <= '7')) { + new_mode = (new_mode << 3) | (ch - '0'); + cp++; + } + if (*cp++ != ' ') + break; + if (get_sha1_hex(cp, old_sha1)) + break; + cp += 40; + if (*cp++ != ' ') + break; + if (get_sha1_hex(cp, new_sha1)) + break; + cp += 40; + if (*cp++ != ' ') + break; + status = *cp++; + if (!strchr("MCRNDU", status)) + break; + two_paths = score = 0; + if (status == DIFF_STATUS_RENAMED || + status == DIFF_STATUS_COPIED) + two_paths = 1; + + /* pick up score if exists */ + if (sscanf(cp, "%d", &score) != 1) + score = 0; + cp = strchr(cp, + inter_name_termination); + if (!cp) + break; + if (*cp++ != inter_name_termination) + break; + + /* first pathname */ + if (!line_termination) { + read_line(&sb, stdin, line_termination); + if (sb.eof) + break; + strcpy(old_path, sb.buf); + } + else if (!two_paths) + strcpy(old_path, cp); + else { + ep = strchr(cp, inter_name_termination); + if (!ep) + break; + strncpy(old_path, cp, ep-cp); + old_path[ep-cp] = 0; + cp = ep + 1; + } + + /* second pathname */ + if (!two_paths) + strcpy(new_path, old_path); + else { + if (!line_termination) { + read_line(&sb, stdin, + line_termination); + if (sb.eof) + break; + strcpy(new_path, sb.buf); + } + else + strcpy(new_path, cp); + } + diff_helper_input(old_mode, new_mode, + old_sha1, new_sha1, + old_path, status, score, + new_path); + continue; + } + flush_them(ac, av); + printf(garbage_flush_format, sb.buf); + } + flush_them(ac, av); + return 0; +} |