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