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...] < <list-of-paths>"),
  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         int line_termination = nul_term_line ? 0 : '\n';
  77
  78         strbuf_init(&buf, 0);
  79         strbuf_init(&nbuf, 0);
  80         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
  81                 if (line_termination && buf.buf[0] == '"') {
  82                         strbuf_reset(&nbuf);
  83                         if (unquote_c_style(&nbuf, buf.buf, NULL))
  84                                 die("line is badly quoted");
  85                         strbuf_swap(&buf, &nbuf);
  86                 }
  87                 check_attr(prefix, cnt, check, buf.buf);
  88                 maybe_flush_or_die(stdout, "attribute to stdout");
  89         }
  90         strbuf_release(&buf);
  91         strbuf_release(&nbuf);
  92 }
  93
  94 static NORETURN void error_with_usage(const char *msg)
  95 {
  96         error("%s", msg);
  97         usage_with_options(check_attr_usage, check_attr_options);
  98 }
  99
 100 int cmd_check_attr(int argc, const char **argv, const char *prefix)
 101 {
 102         struct git_attr_check *check;
 103         int cnt, i, doubledash, filei;
 104
 105         git_config(git_default_config, NULL);
 106
 107         argc = parse_options(argc, argv, prefix, check_attr_options,
 108                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
 109
 110         if (read_cache() < 0) {
 111                 die("invalid cache");
 112         }
 113
 114         if (cached_attrs)
 115                 git_attr_set_direction(GIT_ATTR_INDEX, NULL);
 116
 117         doubledash = -1;
 118         for (i = 0; doubledash < 0 && i < argc; i++) {
 119                 if (!strcmp(argv[i], "--"))
 120                         doubledash = i;
 121         }
 122
 123         /* Process --all and/or attribute arguments: */
 124         if (all_attrs) {
 125                 if (doubledash >= 1)
 126                         error_with_usage("Attributes and --all both specified");
 127
 128                 cnt = 0;
 129                 filei = doubledash + 1;
 130         } else if (doubledash == 0) {
 131                 error_with_usage("No attribute specified");
 132         } else if (doubledash < 0) {
 133                 if (!argc)
 134                         error_with_usage("No attribute specified");
 135
 136                 if (stdin_paths) {
 137                         /* Treat all arguments as attribute names. */
 138                         cnt = argc;
 139                         filei = argc;
 140                 } else {
 141                         /* Treat exactly one argument as an attribute name. */
 142                         cnt = 1;
 143                         filei = 1;
 144                 }
 145         } else {
 146                 cnt = doubledash;
 147                 filei = doubledash + 1;
 148         }
 149
 150         /* Check file argument(s): */
 151         if (stdin_paths) {
 152                 if (filei < argc)
 153                         error_with_usage("Can't specify files with --stdin");
 154         } else {
 155                 if (filei >= argc)
 156                         error_with_usage("No file specified");
 157         }
 158
 159         if (all_attrs) {
 160                 check = NULL;
 161         } else {
 162                 check = xcalloc(cnt, sizeof(*check));
 163                 for (i = 0; i < cnt; i++) {
 164                         const char *name;
 165                         struct git_attr *a;
 166                         name = argv[i];
 167                         a = git_attr(name);
 168                         if (!a)
 169                                 return error("%s: not a valid attribute name",
 170                                         name);
 171                         check[i].attr = a;
 172                 }
 173         }
 174
 175         if (stdin_paths)
 176                 check_attr_stdin_paths(prefix, cnt, check);
 177         else {
 178                 for (i = filei; i < argc; i++)
 179                         check_attr(prefix, cnt, check, argv[i]);
 180                 maybe_flush_or_die(stdout, "attribute to stdout");
 181         }
 182         return 0;
 183 }