builtin/check-attr.c

   1 #define USE_THE_INDEX_VARIABLE
   2 #include "builtin.h"
   3 #include "cache.h"
   4 #include "config.h"
   5 #include "attr.h"
   6 #include "quote.h"
   7 #include "parse-options.h"
   8
   9 static int all_attrs;
  10 static int cached_attrs;
  11 static int stdin_paths;
  12 static char *source;
  13 static const char * const check_attr_usage[] = {
  14 N_("git check-attr [--source <tree-ish>] [-a | --all | <attr>...] [--] <pathname>..."),
  15 N_("git check-attr --stdin [-z] [--source <tree-ish>] [-a | --all | <attr>...]"),
  16 NULL
  17 };
  18
  19 static int nul_term_line;
  20
  21 static const struct option check_attr_options[] = {
  22         OPT_BOOL('a', "all", &all_attrs, N_("report all attributes set on file")),
  23         OPT_BOOL(0,  "cached", &cached_attrs, N_("use .gitattributes only from the index")),
  24         OPT_BOOL(0 , "stdin", &stdin_paths, N_("read file names from stdin")),
  25         OPT_BOOL('z', NULL, &nul_term_line,
  26                  N_("terminate input and output records by a NUL character")),
  27         OPT_STRING(0, "source", &source, N_("<tree-ish>"), N_("which tree-ish to check attributes at")),
  28         OPT_END()
  29 };
  30
  31 static void output_attr(struct attr_check *check, const char *file)
  32 {
  33         int j;
  34         int cnt = check->nr;
  35
  36         for (j = 0; j < cnt; j++) {
  37                 const char *value = check->items[j].value;
  38
  39                 if (ATTR_TRUE(value))
  40                         value = "set";
  41                 else if (ATTR_FALSE(value))
  42                         value = "unset";
  43                 else if (ATTR_UNSET(value))
  44                         value = "unspecified";
  45
  46                 if (nul_term_line) {
  47                         printf("%s%c" /* path */
  48                                "%s%c" /* attrname */
  49                                "%s%c" /* attrvalue */,
  50                                file, 0,
  51                                git_attr_name(check->items[j].attr), 0, value, 0);
  52                 } else {
  53                         quote_c_style(file, NULL, stdout, 0);
  54                         printf(": %s: %s\n",
  55                                git_attr_name(check->items[j].attr), value);
  56                 }
  57         }
  58 }
  59
  60 static void check_attr(const char *prefix, struct attr_check *check,
  61                        const struct object_id *tree_oid, int collect_all,
  62                        const char *file)
  63
  64 {
  65         char *full_path =
  66                 prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
  67
  68         if (collect_all) {
  69                 git_all_attrs(&the_index, tree_oid, full_path, check);
  70         } else {
  71                 git_check_attr(&the_index, tree_oid, full_path, check);
  72         }
  73         output_attr(check, file);
  74
  75         free(full_path);
  76 }
  77
  78 static void check_attr_stdin_paths(const char *prefix, struct attr_check *check,
  79                                    const struct object_id *tree_oid, int collect_all)
  80 {
  81         struct strbuf buf = STRBUF_INIT;
  82         struct strbuf unquoted = STRBUF_INIT;
  83         strbuf_getline_fn getline_fn;
  84
  85         getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
  86         while (getline_fn(&buf, stdin) != EOF) {
  87                 if (!nul_term_line && buf.buf[0] == '"') {
  88                         strbuf_reset(&unquoted);
  89                         if (unquote_c_style(&unquoted, buf.buf, NULL))
  90                                 die("line is badly quoted");
  91                         strbuf_swap(&buf, &unquoted);
  92                 }
  93                 check_attr(prefix, check, tree_oid, collect_all, buf.buf);
  94                 maybe_flush_or_die(stdout, "attribute to stdout");
  95         }
  96         strbuf_release(&buf);
  97         strbuf_release(&unquoted);
  98 }
  99
 100 static NORETURN void error_with_usage(const char *msg)
 101 {
 102         error("%s", msg);
 103         usage_with_options(check_attr_usage, check_attr_options);
 104 }
 105
 106 int cmd_check_attr(int argc, const char **argv, const char *prefix)
 107 {
 108         struct attr_check *check;
 109         struct object_id *tree_oid = NULL;
 110         struct object_id initialized_oid;
 111         int cnt, i, doubledash, filei;
 112
 113         if (!is_bare_repository())
 114                 setup_work_tree();
 115
 116         git_config(git_default_config, NULL);
 117
 118         argc = parse_options(argc, argv, prefix, check_attr_options,
 119                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
 120
 121         if (repo_read_index(the_repository) < 0) {
 122                 die("invalid cache");
 123         }
 124
 125         if (cached_attrs)
 126                 git_attr_set_direction(GIT_ATTR_INDEX);
 127
 128         doubledash = -1;
 129         for (i = 0; doubledash < 0 && i < argc; i++) {
 130                 if (!strcmp(argv[i], "--"))
 131                         doubledash = i;
 132         }
 133
 134         /* Process --all and/or attribute arguments: */
 135         if (all_attrs) {
 136                 if (doubledash >= 1)
 137                         error_with_usage("Attributes and --all both specified");
 138
 139                 cnt = 0;
 140                 filei = doubledash + 1;
 141         } else if (doubledash == 0) {
 142                 error_with_usage("No attribute specified");
 143         } else if (doubledash < 0) {
 144                 if (!argc)
 145                         error_with_usage("No attribute specified");
 146
 147                 if (stdin_paths) {
 148                         /* Treat all arguments as attribute names. */
 149                         cnt = argc;
 150                         filei = argc;
 151                 } else {
 152                         /* Treat exactly one argument as an attribute name. */
 153                         cnt = 1;
 154                         filei = 1;
 155                 }
 156         } else {
 157                 cnt = doubledash;
 158                 filei = doubledash + 1;
 159         }
 160
 161         /* Check file argument(s): */
 162         if (stdin_paths) {
 163                 if (filei < argc)
 164                         error_with_usage("Can't specify files with --stdin");
 165         } else {
 166                 if (filei >= argc)
 167                         error_with_usage("No file specified");
 168         }
 169
 170         check = attr_check_alloc();
 171         if (!all_attrs) {
 172                 for (i = 0; i < cnt; i++) {
 173                         const struct git_attr *a = git_attr(argv[i]);
 174
 175                         if (!a)
 176                                 return error("%s: not a valid attribute name",
 177                                              argv[i]);
 178                         attr_check_append(check, a);
 179                 }
 180         }
 181
 182         if (source) {
 183                 if (repo_get_oid_tree(the_repository, source, &initialized_oid))
 184                         die("%s: not a valid tree-ish source", source);
 185                 tree_oid = &initialized_oid;
 186         }
 187
 188         if (stdin_paths)
 189                 check_attr_stdin_paths(prefix, check, tree_oid, all_attrs);
 190         else {
 191                 for (i = filei; i < argc; i++)
 192                         check_attr(prefix, check, tree_oid, all_attrs, argv[i]);
 193                 maybe_flush_or_die(stdout, "attribute to stdout");
 194         }
 195
 196         attr_check_free(check);
 197         return 0;
 198 }