builtin/check-attr.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "config.h"
   4 #include "attr.h"
   5 #include "quote.h"
   6 #include "parse-options.h"
   7
   8 static int all_attrs;
   9 static int cached_attrs;
  10 static int stdin_paths;
  11 static const char * const check_attr_usage[] = {
  12 N_("git check-attr [-a | --all | <attr>...] [--] <pathname>..."),
  13 N_("git check-attr --stdin [-z] [-a | --all | <attr>...]"),
  14 NULL
  15 };
  16
  17 static int nul_term_line;
  18
  19 static const struct option check_attr_options[] = {
  20         OPT_BOOL('a', "all", &all_attrs, N_("report all attributes set on file")),
  21         OPT_BOOL(0,  "cached", &cached_attrs, N_("use .gitattributes only from the index")),
  22         OPT_BOOL(0 , "stdin", &stdin_paths, N_("read file names from stdin")),
  23         OPT_BOOL('z', NULL, &nul_term_line,
  24                  N_("terminate input and output records by a NUL character")),
  25         OPT_END()
  26 };
  27
  28 static void output_attr(struct attr_check *check, const char *file)
  29 {
  30         int j;
  31         int cnt = check->nr;
  32
  33         for (j = 0; j < cnt; j++) {
  34                 const char *value = check->items[j].value;
  35
  36                 if (ATTR_TRUE(value))
  37                         value = "set";
  38                 else if (ATTR_FALSE(value))
  39                         value = "unset";
  40                 else if (ATTR_UNSET(value))
  41                         value = "unspecified";
  42
  43                 if (nul_term_line) {
  44                         printf("%s%c" /* path */
  45                                "%s%c" /* attrname */
  46                                "%s%c" /* attrvalue */,
  47                                file, 0,
  48                                git_attr_name(check->items[j].attr), 0, value, 0);
  49                 } else {
  50                         quote_c_style(file, NULL, stdout, 0);
  51                         printf(": %s: %s\n",
  52                                git_attr_name(check->items[j].attr), value);
  53                 }
  54         }
  55 }
  56
  57 static void check_attr(const char *prefix,
  58                        struct attr_check *check,
  59                        int collect_all,
  60                        const char *file)
  61 {
  62         char *full_path =
  63                 prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
  64
  65         if (collect_all) {
  66                 git_all_attrs(full_path, check);
  67         } else {
  68                 if (git_check_attr(full_path, check))
  69                         die("git_check_attr died");
  70         }
  71         output_attr(check, file);
  72
  73         free(full_path);
  74 }
  75
  76 static void check_attr_stdin_paths(const char *prefix,
  77                                    struct attr_check *check,
  78                                    int collect_all)
  79 {
  80         struct strbuf buf = STRBUF_INIT;
  81         struct strbuf unquoted = STRBUF_INIT;
  82         strbuf_getline_fn getline_fn;
  83
  84         getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
  85         while (getline_fn(&buf, stdin) != EOF) {
  86                 if (!nul_term_line && buf.buf[0] == '"') {
  87                         strbuf_reset(&unquoted);
  88                         if (unquote_c_style(&unquoted, buf.buf, NULL))
  89                                 die("line is badly quoted");
  90                         strbuf_swap(&buf, &unquoted);
  91                 }
  92                 check_attr(prefix, check, collect_all, buf.buf);
  93                 maybe_flush_or_die(stdout, "attribute to stdout");
  94         }
  95         strbuf_release(&buf);
  96         strbuf_release(&unquoted);
  97 }
  98
  99 static NORETURN void error_with_usage(const char *msg)
 100 {
 101         error("%s", msg);
 102         usage_with_options(check_attr_usage, check_attr_options);
 103 }
 104
 105 int cmd_check_attr(int argc, const char **argv, const char *prefix)
 106 {
 107         struct attr_check *check;
 108         int cnt, i, doubledash, filei;
 109
 110         if (!is_bare_repository())
 111                 setup_work_tree();
 112
 113         git_config(git_default_config, NULL);
 114
 115         argc = parse_options(argc, argv, prefix, check_attr_options,
 116                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
 117
 118         if (read_cache() < 0) {
 119                 die("invalid cache");
 120         }
 121
 122         if (cached_attrs)
 123                 git_attr_set_direction(GIT_ATTR_INDEX, NULL);
 124
 125         doubledash = -1;
 126         for (i = 0; doubledash < 0 && i < argc; i++) {
 127                 if (!strcmp(argv[i], "--"))
 128                         doubledash = i;
 129         }
 130
 131         /* Process --all and/or attribute arguments: */
 132         if (all_attrs) {
 133                 if (doubledash >= 1)
 134                         error_with_usage("Attributes and --all both specified");
 135
 136                 cnt = 0;
 137                 filei = doubledash + 1;
 138         } else if (doubledash == 0) {
 139                 error_with_usage("No attribute specified");
 140         } else if (doubledash < 0) {
 141                 if (!argc)
 142                         error_with_usage("No attribute specified");
 143
 144                 if (stdin_paths) {
 145                         /* Treat all arguments as attribute names. */
 146                         cnt = argc;
 147                         filei = argc;
 148                 } else {
 149                         /* Treat exactly one argument as an attribute name. */
 150                         cnt = 1;
 151                         filei = 1;
 152                 }
 153         } else {
 154                 cnt = doubledash;
 155                 filei = doubledash + 1;
 156         }
 157
 158         /* Check file argument(s): */
 159         if (stdin_paths) {
 160                 if (filei < argc)
 161                         error_with_usage("Can't specify files with --stdin");
 162         } else {
 163                 if (filei >= argc)
 164                         error_with_usage("No file specified");
 165         }
 166
 167         check = attr_check_alloc();
 168         if (!all_attrs) {
 169                 for (i = 0; i < cnt; i++) {
 170                         const struct git_attr *a = git_attr(argv[i]);
 171
 172                         if (!a)
 173                                 return error("%s: not a valid attribute name",
 174                                              argv[i]);
 175                         attr_check_append(check, a);
 176                 }
 177         }
 178
 179         if (stdin_paths)
 180                 check_attr_stdin_paths(prefix, check, all_attrs);
 181         else {
 182                 for (i = filei; i < argc; i++)
 183                         check_attr(prefix, check, all_attrs, argv[i]);
 184                 maybe_flush_or_die(stdout, "attribute to stdout");
 185         }
 186
 187         attr_check_free(check);
 188         return 0;
 189 }