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 stdin_paths;
   8 static const char * const check_attr_usage[] = {
   9 "git check-attr attr... [--] pathname...",
  10 "git check-attr --stdin attr... < <list-of-paths>",
  11 NULL
  12 };
  13
  14 static int null_term_line;
  15
  16 static const struct option check_attr_options[] = {
  17         OPT_BOOLEAN(0 , "stdin", &stdin_paths, "read file names from stdin"),
  18         OPT_BOOLEAN('z', NULL, &null_term_line,
  19                 "input paths are terminated by a null character"),
  20         OPT_END()
  21 };
  22
  23 static void check_attr(int cnt, struct git_attr_check *check,
  24         const char** name, const char *file)
  25 {
  26         int j;
  27         if (git_checkattr(file, cnt, check))
  28                 die("git_checkattr died");
  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", name[j], value);
  41         }
  42 }
  43
  44 static void check_attr_stdin_paths(int cnt, struct git_attr_check *check,
  45         const char** name)
  46 {
  47         struct strbuf buf, nbuf;
  48         int line_termination = null_term_line ? 0 : '\n';
  49
  50         strbuf_init(&buf, 0);
  51         strbuf_init(&nbuf, 0);
  52         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
  53                 if (line_termination && buf.buf[0] == '"') {
  54                         strbuf_reset(&nbuf);
  55                         if (unquote_c_style(&nbuf, buf.buf, NULL))
  56                                 die("line is badly quoted");
  57                         strbuf_swap(&buf, &nbuf);
  58                 }
  59                 check_attr(cnt, check, name, buf.buf);
  60                 maybe_flush_or_die(stdout, "attribute to stdout");
  61         }
  62         strbuf_release(&buf);
  63         strbuf_release(&nbuf);
  64 }
  65
  66 int cmd_check_attr(int argc, const char **argv, const char *prefix)
  67 {
  68         struct git_attr_check *check;
  69         int cnt, i, doubledash;
  70         const char *errstr = NULL;
  71
  72         argc = parse_options(argc, argv, prefix, check_attr_options,
  73                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
  74         if (!argc)
  75                 usage_with_options(check_attr_usage, check_attr_options);
  76
  77         if (read_cache() < 0) {
  78                 die("invalid cache");
  79         }
  80
  81         doubledash = -1;
  82         for (i = 0; doubledash < 0 && i < argc; i++) {
  83                 if (!strcmp(argv[i], "--"))
  84                         doubledash = i;
  85         }
  86
  87         /* If there is no double dash, we handle only one attribute */
  88         if (doubledash < 0) {
  89                 cnt = 1;
  90                 doubledash = 0;
  91         } else
  92                 cnt = doubledash;
  93         doubledash++;
  94
  95         if (cnt <= 0)
  96                 errstr = "No attribute specified";
  97         else if (stdin_paths && doubledash < argc)
  98                 errstr = "Can't specify files with --stdin";
  99         if (errstr) {
 100                 error("%s", errstr);
 101                 usage_with_options(check_attr_usage, check_attr_options);
 102         }
 103
 104         check = xcalloc(cnt, sizeof(*check));
 105         for (i = 0; i < cnt; i++) {
 106                 const char *name;
 107                 struct git_attr *a;
 108                 name = argv[i];
 109                 a = git_attr(name, strlen(name));
 110                 if (!a)
 111                         return error("%s: not a valid attribute name", name);
 112                 check[i].attr = a;
 113         }
 114
 115         if (stdin_paths)
 116                 check_attr_stdin_paths(cnt, check, argv);
 117         else {
 118                 for (i = doubledash; i < argc; i++)
 119                         check_attr(cnt, check, argv, argv[i]);
 120                 maybe_flush_or_die(stdout, "attribute to stdout");
 121         }
 122         return 0;
 123 }