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 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        const char *garbage_flush_format;
  19
  20        strbuf_init(&sb);
  21
  22        while (1 < ac && av[1][0] == '-') {
  23                if (av[1][1] == 'z')
  24                        line_termination = inter_name_termination = 0;
  25                else if (av[1][1] == 'S') {
  26                        pickaxe = av[1] + 2;
  27                }
  28                else if (!strcmp(av[1], "--pickaxe-all"))
  29                        pickaxe_opts = DIFF_PICKAXE_ALL;
  30                else
  31                        usage(diff_helper_usage);
  32                ac--; av++;
  33        }
  34        garbage_flush_format = (line_termination == 0) ? "%s" : "%s\n";
  35
  36        /* the remaining parameters are paths patterns */
  37
  38        diff_setup(0);
  39        while (1) {
  40                unsigned old_mode, new_mode;
  41                unsigned char old_sha1[20], new_sha1[20];
  42                char old_path[PATH_MAX];
  43                int status, score, two_paths;
  44                char new_path[PATH_MAX];
  45
  46                int ch;
  47                char *cp, *ep;
  48
  49                read_line(&sb, stdin, line_termination);
  50                if (sb.eof)
  51                        break;
  52                switch (sb.buf[0]) {
  53                case ':':
  54                        /* parse the first part up to the status */
  55                        cp = sb.buf + 1;
  56                        old_mode = new_mode = 0;
  57                        while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
  58                                old_mode = (old_mode << 3) | (ch - '0');
  59                                cp++;
  60                        }
  61                        if (*cp++ != ' ')
  62                                break;
  63                        while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
  64                                new_mode = (new_mode << 3) | (ch - '0');
  65                                cp++;
  66                        }
  67                        if (*cp++ != ' ')
  68                                break;
  69                        if (get_sha1_hex(cp, old_sha1))
  70                                break;
  71                        cp += 40;
  72                        if (*cp++ != ' ')
  73                                break;
  74                        if (get_sha1_hex(cp, new_sha1))
  75                                break;
  76                        cp += 40;
  77                        if (*cp++ != ' ')
  78                                break;
  79                        status = *cp++;
  80                        if (!strchr("MCRNDU", status))
  81                                break;
  82                        two_paths = score = 0;
  83                        if (status == 'R' || status == 'C')
  84                                two_paths = 1;
  85
  86                        /* pick up score if exists */
  87                        if (sscanf(cp, "%d", &score) != 1)
  88                                score = 0;
  89                        cp = strchr(cp,
  90                                    inter_name_termination);
  91                        if (!cp)
  92                                break;
  93                        if (*cp++ != inter_name_termination)
  94                                break;
  95
  96                        /* first pathname */
  97                        if (!line_termination) {
  98                                read_line(&sb, stdin, line_termination);
  99                                if (sb.eof)
 100                                        break;
 101                                strcpy(old_path, sb.buf);
 102                        }
 103                        else if (!two_paths)
 104                                strcpy(old_path, cp);
 105                        else {
 106                                ep = strchr(cp, inter_name_termination);
 107                                if (!ep)
 108                                        break;
 109                                strncpy(old_path, cp, ep-cp);
 110                                old_path[ep-cp] = 0;
 111                                cp = ep + 1;
 112                        }
 113
 114                        /* second pathname */
 115                        if (!two_paths)
 116                                strcpy(new_path, old_path);
 117                        else {
 118                                if (!line_termination) {
 119                                        read_line(&sb, stdin,
 120                                                  line_termination);
 121                                        if (sb.eof)
 122                                                break;
 123                                        strcpy(new_path, sb.buf);
 124                                }
 125                                else
 126                                        strcpy(new_path, cp);
 127                        }
 128                        diff_helper_input(old_mode, new_mode,
 129                                          old_sha1, new_sha1,
 130                                          old_path, status, score,
 131                                          new_path);
 132                        continue;
 133                }
 134                if (1 < ac)
 135                        diffcore_pathspec(av + 1);
 136                if (pickaxe)
 137                        diffcore_pickaxe(pickaxe, pickaxe_opts);
 138                diff_flush(DIFF_FORMAT_PATCH, 0);
 139                printf(garbage_flush_format, sb.buf);
 140        }
 141        if (1 < ac)
 142                diffcore_pathspec(av + 1);
 143        if (pickaxe)
 144                diffcore_pickaxe(pickaxe, pickaxe_opts);
 145        diff_flush(DIFF_FORMAT_PATCH, 0);
 146        return 0;
 147}