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 output_attr(int cnt, struct git_attr_check *check,
  24         const char *file)
  25 {
  26         int j;
  27         for (j = 0; j < cnt; j++) {
  28                 const char *value = check[j].value;
  29
  30                 if (ATTR_TRUE(value))
  31                         value = "set";
  32                 else if (ATTR_FALSE(value))
  33                         value = "unset";
  34                 else if (ATTR_UNSET(value))
  35                         value = "unspecified";
  36
  37                 quote_c_style(file, NULL, stdout, 0);
  38                 printf(": %s: %s\n", git_attr_name(check[j].attr), value);
  39         }
  40 }
  41
  42 static void check_attr(int cnt, struct git_attr_check *check,
  43         const char *file)
  44 {
  45         if (git_checkattr(file, cnt, check))
  46                 die("git_checkattr died");
  47         output_attr(cnt, check, file);
  48 }
  49
  50 static void check_attr_stdin_paths(int cnt, struct git_attr_check *check)
  51 {
  52         struct strbuf buf, nbuf;
  53         int line_termination = null_term_line ? 0 : '\n';
  54
  55         strbuf_init(&buf, 0);
  56         strbuf_init(&nbuf, 0);
  57         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
  58                 if (line_termination && buf.buf[0] == '"') {
  59                         strbuf_reset(&nbuf);
  60                         if (unquote_c_style(&nbuf, buf.buf, NULL))
  61                                 die("line is badly quoted");
  62                         strbuf_swap(&buf, &nbuf);
  63                 }
  64                 check_attr(cnt, check, buf.buf);
  65                 maybe_flush_or_die(stdout, "attribute to stdout");
  66         }
  67         strbuf_release(&buf);
  68         strbuf_release(&nbuf);
  69 }
  70
  71 static NORETURN void error_with_usage(const char *msg)
  72 {
  73         error("%s", msg);
  74         usage_with_options(check_attr_usage, check_attr_options);
  75 }
  76
  77 int cmd_check_attr(int argc, const char **argv, const char *prefix)
  78 {
  79         struct git_attr_check *check;
  80         int cnt, i, doubledash, filei;
  81
  82         argc = parse_options(argc, argv, prefix, check_attr_options,
  83                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
  84
  85         if (read_cache() < 0) {
  86                 die("invalid cache");
  87         }
  88
  89         doubledash = -1;
  90         for (i = 0; doubledash < 0 && i < argc; i++) {
  91                 if (!strcmp(argv[i], "--"))
  92                         doubledash = i;
  93         }
  94
  95         /* Check attribute argument(s): */
  96         if (doubledash == 0) {
  97                 error_with_usage("No attribute specified");
  98         } else if (doubledash < 0) {
  99                 /*
 100                  * There is no double dash; treat the first
 101                  * argument as an attribute.
 102                  */
 103                 if (!argc)
 104                         error_with_usage("No attribute specified");
 105
 106                 cnt = 1;
 107                 filei = 1;
 108         } else {
 109                 cnt = doubledash;
 110                 filei = doubledash + 1;
 111         }
 112
 113         /* Check file argument(s): */
 114         if (stdin_paths) {
 115                 if (filei < argc)
 116                         error_with_usage("Can't specify files with --stdin");
 117         } else {
 118                 if (filei >= argc)
 119                         error_with_usage("No file specified");
 120         }
 121
 122         check = xcalloc(cnt, sizeof(*check));
 123         for (i = 0; i < cnt; i++) {
 124                 const char *name;
 125                 struct git_attr *a;
 126                 name = argv[i];
 127                 a = git_attr(name);
 128                 if (!a)
 129                         return error("%s: not a valid attribute name", name);
 130                 check[i].attr = a;
 131         }
 132
 133         if (stdin_paths)
 134                 check_attr_stdin_paths(cnt, check);
 135         else {
 136                 for (i = filei; i < argc; i++)
 137                         check_attr(cnt, check, argv[i]);
 138                 maybe_flush_or_die(stdout, "attribute to stdout");
 139         }
 140         return 0;
 141 }