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 "git check-attr [-a | --all | attr...] [--] pathname...",
  12 "git check-attr --stdin [-a | --all | attr...] < <list-of-paths>",
  13 NULL
  14 };
  15
  16 static int null_term_line;
  17
  18 static const struct option check_attr_options[] = {
  19         OPT_BOOLEAN('a', "all", &all_attrs, "report all attributes set on file"),
  20         OPT_BOOLEAN(0,  "cached", &cached_attrs, "use .gitattributes only from the index"),
  21         OPT_BOOLEAN(0 , "stdin", &stdin_paths, "read file names from stdin"),
  22         OPT_BOOLEAN('z', NULL, &null_term_line,
  23                 "input paths are terminated by a null 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                 quote_c_style(file, NULL, stdout, 0);
  42                 printf(": %s: %s\n", git_attr_name(check[j].attr), value);
  43         }
  44 }
  45
  46 static void check_attr(const char *prefix, int cnt,
  47         struct git_attr_check *check, const char *file)
  48 {
  49         char *full_path =
  50                 prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
  51         if (check != NULL) {
  52                 if (git_check_attr(full_path, cnt, check))
  53                         die("git_check_attr died");
  54                 output_attr(cnt, check, file);
  55         } else {
  56                 if (git_all_attrs(full_path, &cnt, &check))
  57                         die("git_all_attrs died");
  58                 output_attr(cnt, check, file);
  59                 free(check);
  60         }
  61         free(full_path);
  62 }
  63
  64 static void check_attr_stdin_paths(const char *prefix, int cnt,
  65         struct git_attr_check *check)
  66 {
  67         struct strbuf buf, nbuf;
  68         int line_termination = null_term_line ? 0 : '\n';
  69
  70         strbuf_init(&buf, 0);
  71         strbuf_init(&nbuf, 0);
  72         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
  73                 if (line_termination && buf.buf[0] == '"') {
  74                         strbuf_reset(&nbuf);
  75                         if (unquote_c_style(&nbuf, buf.buf, NULL))
  76                                 die("line is badly quoted");
  77                         strbuf_swap(&buf, &nbuf);
  78                 }
  79                 check_attr(prefix, cnt, check, buf.buf);
  80                 maybe_flush_or_die(stdout, "attribute to stdout");
  81         }
  82         strbuf_release(&buf);
  83         strbuf_release(&nbuf);
  84 }
  85
  86 static NORETURN void error_with_usage(const char *msg)
  87 {
  88         error("%s", msg);
  89         usage_with_options(check_attr_usage, check_attr_options);
  90 }
  91
  92 int cmd_check_attr(int argc, const char **argv, const char *prefix)
  93 {
  94         struct git_attr_check *check;
  95         int cnt, i, doubledash, filei;
  96
  97         git_config(git_default_config, NULL);
  98
  99         argc = parse_options(argc, argv, prefix, check_attr_options,
 100                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
 101
 102         if (read_cache() < 0) {
 103                 die("invalid cache");
 104         }
 105
 106         if (cached_attrs)
 107                 git_attr_set_direction(GIT_ATTR_INDEX, NULL);
 108
 109         doubledash = -1;
 110         for (i = 0; doubledash < 0 && i < argc; i++) {
 111                 if (!strcmp(argv[i], "--"))
 112                         doubledash = i;
 113         }
 114
 115         /* Process --all and/or attribute arguments: */
 116         if (all_attrs) {
 117                 if (doubledash >= 1)
 118                         error_with_usage("Attributes and --all both specified");
 119
 120                 cnt = 0;
 121                 filei = doubledash + 1;
 122         } else if (doubledash == 0) {
 123                 error_with_usage("No attribute specified");
 124         } else if (doubledash < 0) {
 125                 if (!argc)
 126                         error_with_usage("No attribute specified");
 127
 128                 if (stdin_paths) {
 129                         /* Treat all arguments as attribute names. */
 130                         cnt = argc;
 131                         filei = argc;
 132                 } else {
 133                         /* Treat exactly one argument as an attribute name. */
 134                         cnt = 1;
 135                         filei = 1;
 136                 }
 137         } else {
 138                 cnt = doubledash;
 139                 filei = doubledash + 1;
 140         }
 141
 142         /* Check file argument(s): */
 143         if (stdin_paths) {
 144                 if (filei < argc)
 145                         error_with_usage("Can't specify files with --stdin");
 146         } else {
 147                 if (filei >= argc)
 148                         error_with_usage("No file specified");
 149         }
 150
 151         if (all_attrs) {
 152                 check = NULL;
 153         } else {
 154                 check = xcalloc(cnt, sizeof(*check));
 155                 for (i = 0; i < cnt; i++) {
 156                         const char *name;
 157                         struct git_attr *a;
 158                         name = argv[i];
 159                         a = git_attr(name);
 160                         if (!a)
 161                                 return error("%s: not a valid attribute name",
 162                                         name);
 163                         check[i].attr = a;
 164                 }
 165         }
 166
 167         if (stdin_paths)
 168                 check_attr_stdin_paths(prefix, cnt, check);
 169         else {
 170                 for (i = filei; i < argc; i++)
 171                         check_attr(prefix, cnt, check, argv[i]);
 172                 maybe_flush_or_die(stdout, "attribute to stdout");
 173         }
 174         return 0;
 175 }