Andrew's git - gitweb.git/blob

   1/*
   2 * Copyright (c) 2005 Junio C Hamano
   3 */
   4
   5#include "cache.h"
   6#include "diff.h"
   7
   8static int diff_output_format = DIFF_FORMAT_HUMAN;
   9static int detect_rename = 0;
  10static int find_copies_harder = 0;
  11static int diff_setup_opt = 0;
  12static int diff_score_opt = 0;
  13static const char *pickaxe = NULL;
  14static int pickaxe_opts = 0;
  15static int diff_break_opt = -1;
  16static const char *orderfile = NULL;
  17static const char *diff_filter = NULL;
  18
  19static char *diff_stages_usage =
  20"git-diff-stages [-p] [-r] [-z] [-R] [-B] [-M] [-C] [--find-copies-harder] [-O<orderfile>] [-S<string>] [--pickaxe-all] <stage1> <stage2> [<path>...]";
  21
  22static void diff_stages(int stage1, int stage2)
  23{
  24        int i = 0;
  25        while (i < active_nr) {
  26                struct cache_entry *ce, *stages[4] = { NULL, };
  27                struct cache_entry *one, *two;
  28                const char *name;
  29                int len;
  30                ce = active_cache[i];
  31                len = ce_namelen(ce);
  32                name = ce->name;
  33                for (;;) {
  34                        int stage = ce_stage(ce);
  35                        stages[stage] = ce;
  36                        if (active_nr <= ++i)
  37                                break;
  38                        ce = active_cache[i];
  39                        if (ce_namelen(ce) != len ||
  40                            memcmp(name, ce->name, len))
  41                                break;
  42                }
  43                one = stages[stage1];
  44                two = stages[stage2];
  45                if (!one && !two)
  46                        continue;
  47                if (!one)
  48                        diff_addremove('+', ntohl(two->ce_mode),
  49                                       two->sha1, name, NULL);
  50                else if (!two)
  51                        diff_addremove('-', ntohl(one->ce_mode),
  52                                       one->sha1, name, NULL);
  53                else if (memcmp(one->sha1, two->sha1, 20) ||
  54                         (one->ce_mode != two->ce_mode) ||
  55                         find_copies_harder)
  56                        diff_change(ntohl(one->ce_mode), ntohl(two->ce_mode),
  57                                    one->sha1, two->sha1, name, NULL);
  58        }
  59}
  60
  61int main(int ac, const char **av)
  62{
  63        int stage1, stage2;
  64
  65        read_cache();
  66        while (1 < ac && av[1][0] == '-') {
  67                const char *arg = av[1];
  68                if (!strcmp(arg, "-r"))
  69                        ; /* as usual */
  70                else if (!strcmp(arg, "-p"))
  71                        diff_output_format = DIFF_FORMAT_PATCH;
  72                else if (!strncmp(arg, "-B", 2)) {
  73                        if ((diff_break_opt = diff_scoreopt_parse(arg)) == -1)
  74                                usage(diff_stages_usage);
  75                }
  76                else if (!strncmp(arg, "-M", 2)) {
  77                        detect_rename = DIFF_DETECT_RENAME;
  78                        if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
  79                                usage(diff_stages_usage);
  80                }
  81                else if (!strncmp(arg, "-C", 2)) {
  82                        detect_rename = DIFF_DETECT_COPY;
  83                        if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
  84                                usage(diff_stages_usage);
  85                }
  86                else if (!strcmp(arg, "--find-copies-harder"))
  87                        find_copies_harder = 1;
  88                else if (!strcmp(arg, "-z"))
  89                        diff_output_format = DIFF_FORMAT_MACHINE;
  90                else if (!strcmp(arg, "-R"))
  91                        diff_setup_opt |= DIFF_SETUP_REVERSE;
  92                else if (!strncmp(arg, "-S", 2))
  93                        pickaxe = arg + 2;
  94                else if (!strncmp(arg, "-O", 2))
  95                        orderfile = arg + 2;
  96                else if (!strncmp(arg, "--diff-filter=", 14))
  97                        diff_filter = arg + 14;
  98                else if (!strcmp(arg, "--pickaxe-all"))
  99                        pickaxe_opts = DIFF_PICKAXE_ALL;
 100                else
 101                        usage(diff_stages_usage);
 102                ac--; av++;
 103        }
 104
 105        if (ac < 3 ||
 106            sscanf(av[1], "%d", &stage1) != 1 ||
 107            ! (0 <= stage1 && stage1 <= 3) ||
 108            sscanf(av[2], "%d", &stage2) != 1 ||
 109            ! (0 <= stage2 && stage2 <= 3) ||
 110            find_copies_harder && detect_rename != DIFF_DETECT_COPY)
 111                usage(diff_stages_usage);
 112
 113        av += 3; /* The rest from av[0] are for paths restriction. */
 114        diff_setup(diff_setup_opt);
 115
 116        diff_stages(stage1, stage2);
 117
 118        diffcore_std(av,
 119                     detect_rename, diff_score_opt,
 120                     pickaxe, pickaxe_opts,
 121                     diff_break_opt,
 122                     orderfile,
 123                     diff_filter);
 124        diff_flush(diff_output_format);
 125        return 0;
 126}