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 "environment.h"
   7 #include "gettext.h"
   8 #include "object-name.h"
   9 #include "quote.h"
  10 #include "setup.h"
  11 #include "parse-options.h"
  12 #include "write-or-die.h"
  13
  14 static int all_attrs;
  15 static int cached_attrs;
  16 static int stdin_paths;
  17 static char *source;
  18 static const char * const check_attr_usage[] = {
  19 N_("git check-attr [--source <tree-ish>] [-a | --all | <attr>...] [--] <pathname>..."),
  20 N_("git check-attr --stdin [-z] [--source <tree-ish>] [-a | --all | <attr>...]"),
  21 NULL
  22 };
  23
  24 static int nul_term_line;
  25
  26 static const struct option check_attr_options[] = {
  27         OPT_BOOL('a', "all", &all_attrs, N_("report all attributes set on file")),
  28         OPT_BOOL(0,  "cached", &cached_attrs, N_("use .gitattributes only from the index")),
  29         OPT_BOOL(0 , "stdin", &stdin_paths, N_("read file names from stdin")),
  30         OPT_BOOL('z', NULL, &nul_term_line,
  31                  N_("terminate input and output records by a NUL character")),
  32         OPT_STRING(0, "source", &source, N_("<tree-ish>"), N_("which tree-ish to check attributes at")),
  33         OPT_END()
  34 };
  35
  36 static void output_attr(struct attr_check *check, const char *file)
  37 {
  38         int j;
  39         int cnt = check->nr;
  40
  41         for (j = 0; j < cnt; j++) {
  42                 const char *value = check->items[j].value;
  43
  44                 if (ATTR_TRUE(value))
  45                         value = "set";
  46                 else if (ATTR_FALSE(value))
  47                         value = "unset";
  48                 else if (ATTR_UNSET(value))
  49                         value = "unspecified";
  50
  51                 if (nul_term_line) {
  52                         printf("%s%c" /* path */
  53                                "%s%c" /* attrname */
  54                                "%s%c" /* attrvalue */,
  55                                file, 0,
  56                                git_attr_name(check->items[j].attr), 0, value, 0);
  57                 } else {
  58                         quote_c_style(file, NULL, stdout, 0);
  59                         printf(": %s: %s\n",
  60                                git_attr_name(check->items[j].attr), value);
  61                 }
  62         }
  63 }
  64
  65 static void check_attr(const char *prefix, struct attr_check *check,
  66                        const struct object_id *tree_oid, int collect_all,
  67                        const char *file)
  68
  69 {
  70         char *full_path =
  71                 prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
  72
  73         if (collect_all) {
  74                 git_all_attrs(&the_index, tree_oid, full_path, check);
  75         } else {
  76                 git_check_attr(&the_index, tree_oid, full_path, check);
  77         }
  78         output_attr(check, file);
  79
  80         free(full_path);
  81 }
  82
  83 static void check_attr_stdin_paths(const char *prefix, struct attr_check *check,
  84                                    const struct object_id *tree_oid, int collect_all)
  85 {
  86         struct strbuf buf = STRBUF_INIT;
  87         struct strbuf unquoted = STRBUF_INIT;
  88         strbuf_getline_fn getline_fn;
  89
  90         getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
  91         while (getline_fn(&buf, stdin) != EOF) {
  92                 if (!nul_term_line && buf.buf[0] == '"') {
  93                         strbuf_reset(&unquoted);
  94                         if (unquote_c_style(&unquoted, buf.buf, NULL))
  95                                 die("line is badly quoted");
  96                         strbuf_swap(&buf, &unquoted);
  97                 }
  98                 check_attr(prefix, check, tree_oid, collect_all, buf.buf);
  99                 maybe_flush_or_die(stdout, "attribute to stdout");
 100         }
 101         strbuf_release(&buf);
 102         strbuf_release(&unquoted);
 103 }
 104
 105 static NORETURN void error_with_usage(const char *msg)
 106 {
 107         error("%s", msg);
 108         usage_with_options(check_attr_usage, check_attr_options);
 109 }
 110
 111 int cmd_check_attr(int argc, const char **argv, const char *prefix)
 112 {
 113         struct attr_check *check;
 114         struct object_id *tree_oid = NULL;
 115         struct object_id initialized_oid;
 116         int cnt, i, doubledash, filei;
 117
 118         if (!is_bare_repository())
 119                 setup_work_tree();
 120
 121         git_config(git_default_config, NULL);
 122
 123         argc = parse_options(argc, argv, prefix, check_attr_options,
 124                              check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
 125
 126         if (repo_read_index(the_repository) < 0) {
 127                 die("invalid cache");
 128         }
 129
 130         if (cached_attrs)
 131                 git_attr_set_direction(GIT_ATTR_INDEX);
 132
 133         doubledash = -1;
 134         for (i = 0; doubledash < 0 && i < argc; i++) {
 135                 if (!strcmp(argv[i], "--"))
 136                         doubledash = i;
 137         }
 138
 139         /* Process --all and/or attribute arguments: */
 140         if (all_attrs) {
 141                 if (doubledash >= 1)
 142                         error_with_usage("Attributes and --all both specified");
 143
 144                 cnt = 0;
 145                 filei = doubledash + 1;
 146         } else if (doubledash == 0) {
 147                 error_with_usage("No attribute specified");
 148         } else if (doubledash < 0) {
 149                 if (!argc)
 150                         error_with_usage("No attribute specified");
 151
 152                 if (stdin_paths) {
 153                         /* Treat all arguments as attribute names. */
 154                         cnt = argc;
 155                         filei = argc;
 156                 } else {
 157                         /* Treat exactly one argument as an attribute name. */
 158                         cnt = 1;
 159                         filei = 1;
 160                 }
 161         } else {
 162                 cnt = doubledash;
 163                 filei = doubledash + 1;
 164         }
 165
 166         /* Check file argument(s): */
 167         if (stdin_paths) {
 168                 if (filei < argc)
 169                         error_with_usage("Can't specify files with --stdin");
 170         } else {
 171                 if (filei >= argc)
 172                         error_with_usage("No file specified");
 173         }
 174
 175         check = attr_check_alloc();
 176         if (!all_attrs) {
 177                 for (i = 0; i < cnt; i++) {
 178                         const struct git_attr *a = git_attr(argv[i]);
 179
 180                         if (!a)
 181                                 return error("%s: not a valid attribute name",
 182                                              argv[i]);
 183                         attr_check_append(check, a);
 184                 }
 185         }
 186
 187         if (source) {
 188                 if (repo_get_oid_tree(the_repository, source, &initialized_oid))
 189                         die("%s: not a valid tree-ish source", source);
 190                 tree_oid = &initialized_oid;
 191         }
 192
 193         if (stdin_paths)
 194                 check_attr_stdin_paths(prefix, check, tree_oid, all_attrs);
 195         else {
 196                 for (i = filei; i < argc; i++)
 197                         check_attr(prefix, check, tree_oid, all_attrs, argv[i]);
 198                 maybe_flush_or_die(stdout, "attribute to stdout");
 199         }
 200
 201         attr_check_free(check);
 202         return 0;
 203 }