Andrew's git - gitweb.git/blob

   1/*
   2 * GIT - The information manager from hell
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 */
   6#include "cache.h"
   7
   8static void show_differences(char *name,
   9        void *old_contents, unsigned long long old_size)
  10{
  11        static char cmd[1000];
  12        FILE *f;
  13
  14        snprintf(cmd, sizeof(cmd), "diff -L %s -u -N  - %s", name, name);
  15        f = popen(cmd, "w");
  16        if (old_size)
  17                fwrite(old_contents, old_size, 1, f);
  18        pclose(f);
  19}
  20
  21static void show_diff_empty(struct cache_entry *ce)
  22{
  23        char *old;
  24        unsigned long int size;
  25        int lines=0;
  26        unsigned char type[20], *p, *end;
  27
  28        old = read_sha1_file(ce->sha1, type, &size);
  29        if (size > 0) {
  30                int startline = 1;
  31                int c = 0;
  32
  33                printf("--- %s\n", ce->name);
  34                printf("+++ /dev/null\n");
  35                p = old;
  36                end = old + size;
  37                while (p < end)
  38                        if (*p++ == '\n')
  39                                lines ++;
  40                printf("@@ -1,%d +0,0 @@\n", lines);
  41                p = old;
  42                while (p < end) {
  43                        c = *p++;
  44                        if (startline) {
  45                                putchar('-');
  46                                startline = 0;
  47                        }
  48                        putchar(c);
  49                        if (c == '\n')
  50                                startline = 1;
  51                }
  52                if (c!='\n')
  53                        printf("\n");
  54                fflush(stdout);
  55        }
  56}
  57
  58int main(int argc, char **argv)
  59{
  60        int silent = 0;
  61        int entries = read_cache();
  62        int i;
  63
  64        while (argc-- > 1) {
  65                if (!strcmp(argv[1], "-s")) {
  66                        silent = 1;
  67                        continue;
  68                }
  69                usage("show-diff [-s]");
  70        }
  71
  72        if (entries < 0) {
  73                perror("read_cache");
  74                exit(1);
  75        }
  76        for (i = 0; i < entries; i++) {
  77                struct stat st;
  78                struct cache_entry *ce = active_cache[i];
  79                int n, changed;
  80                unsigned long size;
  81                char type[20];
  82                void *new;
  83
  84                if (stat(ce->name, &st) < 0) {
  85                        printf("%s: %s\n", ce->name, strerror(errno));
  86                        if (errno == ENOENT && !silent)
  87                                show_diff_empty(ce);
  88                        continue;
  89                }
  90                changed = cache_match_stat(ce, &st);
  91                if (!changed)
  92                        continue;
  93                printf("%.*s:  ", ce_namelen(ce), ce->name);
  94                for (n = 0; n < 20; n++)
  95                        printf("%02x", ce->sha1[n]);
  96                printf("\n");
  97                fflush(stdout);
  98                if (silent)
  99                        continue;
 100
 101                new = read_sha1_file(ce->sha1, type, &size);
 102                show_differences(ce->name, new, size);
 103                free(new);
 104        }
 105        return 0;
 106}