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