builtin/check-attr.c

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