repo-config.con commit xdiff: generate "anti-diffs" aka what is common to two files (a9ed376)
   1#include "cache.h"
   2#include <regex.h>
   3
   4static const char git_config_set_usage[] =
   5"git-repo-config [ --bool | --int ] [--get | --get-all | --get-regexp | --replace-all | --unset | --unset-all] name [value [value_regex]] | --list";
   6
   7static char* key = NULL;
   8static regex_t* key_regexp = NULL;
   9static regex_t* regexp = NULL;
  10static int show_keys = 0;
  11static int use_key_regexp = 0;
  12static int do_all = 0;
  13static int do_not_match = 0;
  14static int seen = 0;
  15static enum { T_RAW, T_INT, T_BOOL } type = T_RAW;
  16
  17static int show_all_config(const char *key_, const char *value_)
  18{
  19        if (value_)
  20                printf("%s=%s\n", key_, value_);
  21        else
  22                printf("%s\n", key_);
  23        return 0;
  24}
  25
  26static int show_config(const char* key_, const char* value_)
  27{
  28        char value[256];
  29        const char *vptr = value;
  30        int dup_error = 0;
  31
  32        if (!use_key_regexp && strcmp(key_, key))
  33                return 0;
  34        if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
  35                return 0;
  36        if (regexp != NULL &&
  37                         (do_not_match ^
  38                          regexec(regexp, (value_?value_:""), 0, NULL, 0)))
  39                return 0;
  40
  41        if (show_keys)
  42                printf("%s ", key_);
  43        if (seen && !do_all)
  44                dup_error = 1;
  45        if (type == T_INT)
  46                sprintf(value, "%d", git_config_int(key_, value_?value_:""));
  47        else if (type == T_BOOL)
  48                vptr = git_config_bool(key_, value_) ? "true" : "false";
  49        else
  50                vptr = value_?value_:"";
  51        seen++;
  52        if (dup_error) {
  53                error("More than one value for the key %s: %s",
  54                                key_, vptr);
  55        }
  56        else
  57                printf("%s\n", vptr);
  58
  59        return 0;
  60}
  61
  62static int get_value(const char* key_, const char* regex_)
  63{
  64        int ret = -1;
  65        char *tl;
  66        char *global = NULL, *repo_config = NULL;
  67        const char *local;
  68
  69        local = getenv("GIT_CONFIG");
  70        if (!local) {
  71                const char *home = getenv("HOME");
  72                local = getenv("GIT_CONFIG_LOCAL");
  73                if (!local)
  74                        local = repo_config = strdup(git_path("config"));
  75                if (home)
  76                        global = strdup(mkpath("%s/.gitconfig", home));
  77        }
  78
  79        key = strdup(key_);
  80        for (tl=key+strlen(key)-1; tl >= key && *tl != '.'; --tl)
  81                *tl = tolower(*tl);
  82        for (tl=key; *tl && *tl != '.'; ++tl)
  83                *tl = tolower(*tl);
  84
  85        if (use_key_regexp) {
  86                key_regexp = (regex_t*)malloc(sizeof(regex_t));
  87                if (regcomp(key_regexp, key, REG_EXTENDED)) {
  88                        fprintf(stderr, "Invalid key pattern: %s\n", key_);
  89                        goto free_strings;
  90                }
  91        }
  92
  93        if (regex_) {
  94                if (regex_[0] == '!') {
  95                        do_not_match = 1;
  96                        regex_++;
  97                }
  98
  99                regexp = (regex_t*)malloc(sizeof(regex_t));
 100                if (regcomp(regexp, regex_, REG_EXTENDED)) {
 101                        fprintf(stderr, "Invalid pattern: %s\n", regex_);
 102                        goto free_strings;
 103                }
 104        }
 105
 106        if (do_all && global)
 107                git_config_from_file(show_config, global);
 108        git_config_from_file(show_config, local);
 109        if (!do_all && !seen && global)
 110                git_config_from_file(show_config, global);
 111
 112        free(key);
 113        if (regexp) {
 114                regfree(regexp);
 115                free(regexp);
 116        }
 117
 118        if (do_all)
 119                ret = !seen;
 120        else
 121                ret =  (seen == 1) ? 0 : 1;
 122
 123free_strings:
 124        if (repo_config)
 125                free(repo_config);
 126        if (global)
 127                free(global);
 128        return ret;
 129}
 130
 131int main(int argc, const char **argv)
 132{
 133        int nongit = 0;
 134        setup_git_directory_gently(&nongit);
 135
 136        while (1 < argc) {
 137                if (!strcmp(argv[1], "--int"))
 138                        type = T_INT;
 139                else if (!strcmp(argv[1], "--bool"))
 140                        type = T_BOOL;
 141                else if (!strcmp(argv[1], "--list") || !strcmp(argv[1], "-l"))
 142                        return git_config(show_all_config);
 143                else
 144                        break;
 145                argc--;
 146                argv++;
 147        }
 148
 149        switch (argc) {
 150        case 2:
 151                return get_value(argv[1], NULL);
 152        case 3:
 153                if (!strcmp(argv[1], "--unset"))
 154                        return git_config_set(argv[2], NULL);
 155                else if (!strcmp(argv[1], "--unset-all"))
 156                        return git_config_set_multivar(argv[2], NULL, NULL, 1);
 157                else if (!strcmp(argv[1], "--get"))
 158                        return get_value(argv[2], NULL);
 159                else if (!strcmp(argv[1], "--get-all")) {
 160                        do_all = 1;
 161                        return get_value(argv[2], NULL);
 162                } else if (!strcmp(argv[1], "--get-regexp")) {
 163                        show_keys = 1;
 164                        use_key_regexp = 1;
 165                        do_all = 1;
 166                        return get_value(argv[2], NULL);
 167                } else
 168
 169                        return git_config_set(argv[1], argv[2]);
 170        case 4:
 171                if (!strcmp(argv[1], "--unset"))
 172                        return git_config_set_multivar(argv[2], NULL, argv[3], 0);
 173                else if (!strcmp(argv[1], "--unset-all"))
 174                        return git_config_set_multivar(argv[2], NULL, argv[3], 1);
 175                else if (!strcmp(argv[1], "--get"))
 176                        return get_value(argv[2], argv[3]);
 177                else if (!strcmp(argv[1], "--get-all")) {
 178                        do_all = 1;
 179                        return get_value(argv[2], argv[3]);
 180                } else if (!strcmp(argv[1], "--get-regexp")) {
 181                        show_keys = 1;
 182                        use_key_regexp = 1;
 183                        do_all = 1;
 184                        return get_value(argv[2], argv[3]);
 185                } else if (!strcmp(argv[1], "--replace-all"))
 186
 187                        return git_config_set_multivar(argv[2], argv[3], NULL, 1);
 188                else
 189
 190                        return git_config_set_multivar(argv[1], argv[2], argv[3], 0);
 191        case 5:
 192                if (!strcmp(argv[1], "--replace-all"))
 193                        return git_config_set_multivar(argv[2], argv[3], argv[4], 1);
 194        case 1:
 195        default:
 196                usage(git_config_set_usage);
 197        }
 198        return 0;
 199}