Andrew's git - gitweb.git/blob

   1/*
   2 * Copyright (C) 2005 Junio C Hamano
   3 */
   4#include "cache.h"
   5#include "strbuf.h"
   6#include "diff.h"
   7
   8static const char *pickaxe = NULL;
   9static int pickaxe_opts = 0;
  10static const char *orderfile = NULL;
  11static const char *diff_filter = NULL;
  12static int line_termination = '\n';
  13static int inter_name_termination = '\t';
  14
  15static void flush_them(int ac, const char **av)
  16{
  17        diffcore_std_no_resolve(av + 1,
  18                                pickaxe, pickaxe_opts,
  19                                orderfile, diff_filter);
  20        diff_flush(DIFF_FORMAT_PATCH);
  21}
  22
  23static const char *diff_helper_usage =
  24        "git-diff-helper [-z] [-S<string>] [-O<orderfile>] paths...";
  25
  26int main(int ac, const char **av) {
  27        struct strbuf sb;
  28        const char *garbage_flush_format;
  29
  30        strbuf_init(&sb);
  31
  32        while (1 < ac && av[1][0] == '-') {
  33                if (av[1][1] == 'z')
  34                        line_termination = inter_name_termination = 0;
  35                else if (av[1][1] == 'S') {
  36                        pickaxe = av[1] + 2;
  37                }
  38                else if (!strcmp(av[1], "--pickaxe-all"))
  39                        pickaxe_opts = DIFF_PICKAXE_ALL;
  40                else if (!strncmp(av[1], "--diff-filter=", 14))
  41                        diff_filter = av[1] + 14;
  42                else if (!strncmp(av[1], "-O", 2))
  43                        orderfile = av[1] + 2;
  44                else
  45                        usage(diff_helper_usage);
  46                ac--; av++;
  47        }
  48        garbage_flush_format = (line_termination == 0) ? "%s" : "%s\n";
  49
  50        /* the remaining parameters are paths patterns */
  51
  52        diff_setup(0);
  53        while (1) {
  54                unsigned old_mode, new_mode;
  55                unsigned char old_sha1[20], new_sha1[20];
  56                char old_path[PATH_MAX];
  57                int status, score, two_paths;
  58                char new_path[PATH_MAX];
  59
  60                int ch;
  61                char *cp, *ep;
  62
  63                read_line(&sb, stdin, line_termination);
  64                if (sb.eof)
  65                        break;
  66                switch (sb.buf[0]) {
  67                case ':':
  68                        /* parse the first part up to the status */
  69                        cp = sb.buf + 1;
  70                        old_mode = new_mode = 0;
  71                        while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
  72                                old_mode = (old_mode << 3) | (ch - '0');
  73                                cp++;
  74                        }
  75                        if (*cp++ != ' ')
  76                                break;
  77                        while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
  78                                new_mode = (new_mode << 3) | (ch - '0');
  79                                cp++;
  80                        }
  81                        if (*cp++ != ' ')
  82                                break;
  83                        if (get_sha1_hex(cp, old_sha1))
  84                                break;
  85                        cp += 40;
  86                        if (*cp++ != ' ')
  87                                break;
  88                        if (get_sha1_hex(cp, new_sha1))
  89                                break;
  90                        cp += 40;
  91                        if (*cp++ != ' ')
  92                                break;
  93                        status = *cp++;
  94                        if (!strchr("MCRNDU", status))
  95                                break;
  96                        two_paths = score = 0;
  97                        if (status == 'R' || status == 'C')
  98                                two_paths = 1;
  99
 100                        /* pick up score if exists */
 101                        if (sscanf(cp, "%d", &score) != 1)
 102                                score = 0;
 103                        cp = strchr(cp,
 104                                    inter_name_termination);
 105                        if (!cp)
 106                                break;
 107                        if (*cp++ != inter_name_termination)
 108                                break;
 109
 110                        /* first pathname */
 111                        if (!line_termination) {
 112                                read_line(&sb, stdin, line_termination);
 113                                if (sb.eof)
 114                                        break;
 115                                strcpy(old_path, sb.buf);
 116                        }
 117                        else if (!two_paths)
 118                                strcpy(old_path, cp);
 119                        else {
 120                                ep = strchr(cp, inter_name_termination);
 121                                if (!ep)
 122                                        break;
 123                                strncpy(old_path, cp, ep-cp);
 124                                old_path[ep-cp] = 0;
 125                                cp = ep + 1;
 126                        }
 127
 128                        /* second pathname */
 129                        if (!two_paths)
 130                                strcpy(new_path, old_path);
 131                        else {
 132                                if (!line_termination) {
 133                                        read_line(&sb, stdin,
 134                                                  line_termination);
 135                                        if (sb.eof)
 136                                                break;
 137                                        strcpy(new_path, sb.buf);
 138                                }
 139                                else
 140                                        strcpy(new_path, cp);
 141                        }
 142                        diff_helper_input(old_mode, new_mode,
 143                                          old_sha1, new_sha1,
 144                                          old_path, status, score,
 145                                          new_path);
 146                        continue;
 147                }
 148                flush_them(ac, av);
 149                printf(garbage_flush_format, sb.buf);
 150        }
 151        flush_them(ac, av);
 152        return 0;
 153}