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_RAW;
   9static int diff_line_termination = '\n';
  10static int detect_rename = 0;
  11static int find_copies_harder = 0;
  12static int diff_setup_opt = 0;
  13static int diff_score_opt = 0;
  14static const char *pickaxe = NULL;
  15static int pickaxe_opts = 0;
  16static int diff_break_opt = -1;
  17static const char *orderfile = NULL;
  18static const char *diff_filter = NULL;
  19
  20static char *diff_stages_usage =
  21"git-diff-stages [<common diff options>] <stage1> <stage2> [<path>...]"
  22COMMON_DIFF_OPTIONS_HELP;
  23
  24static void diff_stages(int stage1, int stage2)
  25{
  26        int i = 0;
  27        while (i < active_nr) {
  28                struct cache_entry *ce, *stages[4] = { NULL, };
  29                struct cache_entry *one, *two;
  30                const char *name;
  31                int len;
  32                ce = active_cache[i];
  33                len = ce_namelen(ce);
  34                name = ce->name;
  35                for (;;) {
  36                        int stage = ce_stage(ce);
  37                        stages[stage] = ce;
  38                        if (active_nr <= ++i)
  39                                break;
  40                        ce = active_cache[i];
  41                        if (ce_namelen(ce) != len ||
  42                            memcmp(name, ce->name, len))
  43                                break;
  44                }
  45                one = stages[stage1];
  46                two = stages[stage2];
  47                if (!one && !two)
  48                        continue;
  49                if (!one)
  50                        diff_addremove('+', ntohl(two->ce_mode),
  51                                       two->sha1, name, NULL);
  52                else if (!two)
  53                        diff_addremove('-', ntohl(one->ce_mode),
  54                                       one->sha1, name, NULL);
  55                else if (memcmp(one->sha1, two->sha1, 20) ||
  56                         (one->ce_mode != two->ce_mode) ||
  57                         find_copies_harder)
  58                        diff_change(ntohl(one->ce_mode), ntohl(two->ce_mode),
  59                                    one->sha1, two->sha1, name, NULL);
  60        }
  61}
  62
  63int main(int ac, const char **av)
  64{
  65        int stage1, stage2;
  66
  67        read_cache();
  68        while (1 < ac && av[1][0] == '-') {
  69                const char *arg = av[1];
  70                if (!strcmp(arg, "-r"))
  71                        ; /* as usual */
  72                else if (!strcmp(arg, "-p") || !strcmp(arg, "-u"))
  73                        diff_output_format = DIFF_FORMAT_PATCH;
  74                else if (!strncmp(arg, "-B", 2)) {
  75                        if ((diff_break_opt = diff_scoreopt_parse(arg)) == -1)
  76                                usage(diff_stages_usage);
  77                }
  78                else if (!strncmp(arg, "-M", 2)) {
  79                        detect_rename = DIFF_DETECT_RENAME;
  80                        if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
  81                                usage(diff_stages_usage);
  82                }
  83                else if (!strncmp(arg, "-C", 2)) {
  84                        detect_rename = DIFF_DETECT_COPY;
  85                        if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
  86                                usage(diff_stages_usage);
  87                }
  88                else if (!strcmp(arg, "--find-copies-harder"))
  89                        find_copies_harder = 1;
  90                else if (!strcmp(arg, "-z"))
  91                        diff_line_termination = 0;
  92                else if (!strcmp(arg, "--name-only"))
  93                        diff_output_format = DIFF_FORMAT_NAME;
  94                else if (!strcmp(arg, "-R"))
  95                        diff_setup_opt |= DIFF_SETUP_REVERSE;
  96                else if (!strncmp(arg, "-S", 2))
  97                        pickaxe = arg + 2;
  98                else if (!strncmp(arg, "-O", 2))
  99                        orderfile = arg + 2;
 100                else if (!strncmp(arg, "--diff-filter=", 14))
 101                        diff_filter = arg + 14;
 102                else if (!strcmp(arg, "--pickaxe-all"))
 103                        pickaxe_opts = DIFF_PICKAXE_ALL;
 104                else
 105                        usage(diff_stages_usage);
 106                ac--; av++;
 107        }
 108
 109        if (ac < 3 ||
 110            sscanf(av[1], "%d", &stage1) != 1 ||
 111            ! (0 <= stage1 && stage1 <= 3) ||
 112            sscanf(av[2], "%d", &stage2) != 1 ||
 113            ! (0 <= stage2 && stage2 <= 3) ||
 114            (find_copies_harder && detect_rename != DIFF_DETECT_COPY))
 115                usage(diff_stages_usage);
 116
 117        av += 3; /* The rest from av[0] are for paths restriction. */
 118        diff_setup(diff_setup_opt);
 119
 120        diff_stages(stage1, stage2);
 121
 122        diffcore_std(av,
 123                     detect_rename, diff_score_opt,
 124                     pickaxe, pickaxe_opts,
 125                     diff_break_opt,
 126                     orderfile,
 127                     diff_filter);
 128        diff_flush(diff_output_format, diff_line_termination);
 129        return 0;
 130}