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         argc = parse_options(argc, argv, prefix, check_attr_options,
  98                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
  99
 100         if (read_cache() < 0) {
 101                 die("invalid cache");
 102         }
 103
 104         if (cached_attrs)
 105                 git_attr_set_direction(GIT_ATTR_INDEX, NULL);
 106
 107         doubledash = -1;
 108         for (i = 0; doubledash < 0 && i < argc; i++) {
 109                 if (!strcmp(argv[i], "--"))
 110                         doubledash = i;
 111         }
 112
 113         /* Process --all and/or attribute arguments: */
 114         if (all_attrs) {
 115                 if (doubledash >= 1)
 116                         error_with_usage("Attributes and --all both specified");
 117
 118                 cnt = 0;
 119                 filei = doubledash + 1;
 120         } else if (doubledash == 0) {
 121                 error_with_usage("No attribute specified");
 122         } else if (doubledash < 0) {
 123                 if (!argc)
 124                         error_with_usage("No attribute specified");
 125
 126                 if (stdin_paths) {
 127                         /* Treat all arguments as attribute names. */
 128                         cnt = argc;
 129                         filei = argc;
 130                 } else {
 131                         /* Treat exactly one argument as an attribute name. */
 132                         cnt = 1;
 133                         filei = 1;
 134                 }
 135         } else {
 136                 cnt = doubledash;
 137                 filei = doubledash + 1;
 138         }
 139
 140         /* Check file argument(s): */
 141         if (stdin_paths) {
 142                 if (filei < argc)
 143                         error_with_usage("Can't specify files with --stdin");
 144         } else {
 145                 if (filei >= argc)
 146                         error_with_usage("No file specified");
 147         }
 148
 149         if (all_attrs) {
 150                 check = NULL;
 151         } else {
 152                 check = xcalloc(cnt, sizeof(*check));
 153                 for (i = 0; i < cnt; i++) {
 154                         const char *name;
 155                         struct git_attr *a;
 156                         name = argv[i];
 157                         a = git_attr(name);
 158                         if (!a)
 159                                 return error("%s: not a valid attribute name",
 160                                         name);
 161                         check[i].attr = a;
 162                 }
 163         }
 164
 165         if (stdin_paths)
 166                 check_attr_stdin_paths(prefix, cnt, check);
 167         else {
 168                 for (i = filei; i < argc; i++)
 169                         check_attr(prefix, cnt, check, argv[i]);
 170                 maybe_flush_or_die(stdout, "attribute to stdout");
 171         }
 172         return 0;
 173 }