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 stdin_paths;
   9 static const char * const check_attr_usage[] = {
  10 "git check-attr [-a | --all | attr...] [--] pathname...",
  11 "git check-attr --stdin [-a | --all | attr...] < <list-of-paths>",
  12 NULL
  13 };
  14
  15 static int null_term_line;
  16
  17 static const struct option check_attr_options[] = {
  18         OPT_BOOLEAN('a', "all", &all_attrs, "report all attributes set on file"),
  19         OPT_BOOLEAN(0 , "stdin", &stdin_paths, "read file names from stdin"),
  20         OPT_BOOLEAN('z', NULL, &null_term_line,
  21                 "input paths are terminated by a null character"),
  22         OPT_END()
  23 };
  24
  25 static void output_attr(int cnt, struct git_attr_check *check,
  26         const char *file)
  27 {
  28         int j;
  29         for (j = 0; j < cnt; j++) {
  30                 const char *value = check[j].value;
  31
  32                 if (ATTR_TRUE(value))
  33                         value = "set";
  34                 else if (ATTR_FALSE(value))
  35                         value = "unset";
  36                 else if (ATTR_UNSET(value))
  37                         value = "unspecified";
  38
  39                 quote_c_style(file, NULL, stdout, 0);
  40                 printf(": %s: %s\n", git_attr_name(check[j].attr), value);
  41         }
  42 }
  43
  44 static void check_attr(int cnt, struct git_attr_check *check,
  45         const char *file)
  46 {
  47         if (check != NULL) {
  48                 if (git_checkattr(file, cnt, check))
  49                         die("git_checkattr died");
  50                 output_attr(cnt, check, file);
  51         } else {
  52                 if (git_all_attrs(file, &cnt, &check))
  53                         die("git_all_attrs died");
  54                 output_attr(cnt, check, file);
  55                 free(check);
  56         }
  57 }
  58
  59 static void check_attr_stdin_paths(int cnt, struct git_attr_check *check)
  60 {
  61         struct strbuf buf, nbuf;
  62         int line_termination = null_term_line ? 0 : '\n';
  63
  64         strbuf_init(&buf, 0);
  65         strbuf_init(&nbuf, 0);
  66         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
  67                 if (line_termination && buf.buf[0] == '"') {
  68                         strbuf_reset(&nbuf);
  69                         if (unquote_c_style(&nbuf, buf.buf, NULL))
  70                                 die("line is badly quoted");
  71                         strbuf_swap(&buf, &nbuf);
  72                 }
  73                 check_attr(cnt, check, buf.buf);
  74                 maybe_flush_or_die(stdout, "attribute to stdout");
  75         }
  76         strbuf_release(&buf);
  77         strbuf_release(&nbuf);
  78 }
  79
  80 static NORETURN void error_with_usage(const char *msg)
  81 {
  82         error("%s", msg);
  83         usage_with_options(check_attr_usage, check_attr_options);
  84 }
  85
  86 int cmd_check_attr(int argc, const char **argv, const char *prefix)
  87 {
  88         struct git_attr_check *check;
  89         int cnt, i, doubledash, filei;
  90
  91         argc = parse_options(argc, argv, prefix, check_attr_options,
  92                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
  93
  94         if (read_cache() < 0) {
  95                 die("invalid cache");
  96         }
  97
  98         doubledash = -1;
  99         for (i = 0; doubledash < 0 && i < argc; i++) {
 100                 if (!strcmp(argv[i], "--"))
 101                         doubledash = i;
 102         }
 103
 104         /* Process --all and/or attribute arguments: */
 105         if (all_attrs) {
 106                 if (doubledash >= 1)
 107                         error_with_usage("Attributes and --all both specified");
 108
 109                 cnt = 0;
 110                 filei = doubledash + 1;
 111         } else if (doubledash == 0) {
 112                 error_with_usage("No attribute specified");
 113         } else if (doubledash < 0) {
 114                 /*
 115                  * There is no double dash; treat the first
 116                  * argument as an attribute.
 117                  */
 118                 if (!argc)
 119                         error_with_usage("No attribute specified");
 120
 121                 cnt = 1;
 122                 filei = 1;
 123         } else {
 124                 cnt = doubledash;
 125                 filei = doubledash + 1;
 126         }
 127
 128         /* Check file argument(s): */
 129         if (stdin_paths) {
 130                 if (filei < argc)
 131                         error_with_usage("Can't specify files with --stdin");
 132         } else {
 133                 if (filei >= argc)
 134                         error_with_usage("No file specified");
 135         }
 136
 137         if (all_attrs) {
 138                 check = NULL;
 139         } else {
 140                 check = xcalloc(cnt, sizeof(*check));
 141                 for (i = 0; i < cnt; i++) {
 142                         const char *name;
 143                         struct git_attr *a;
 144                         name = argv[i];
 145                         a = git_attr(name);
 146                         if (!a)
 147                                 return error("%s: not a valid attribute name",
 148                                         name);
 149                         check[i].attr = a;
 150                 }
 151         }
 152
 153         if (stdin_paths)
 154                 check_attr_stdin_paths(cnt, check);
 155         else {
 156                 for (i = filei; i < argc; i++)
 157                         check_attr(cnt, check, argv[i]);
 158                 maybe_flush_or_die(stdout, "attribute to stdout");
 159         }
 160         return 0;
 161 }