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[git/git.git] / 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 N_("git check-attr [-a | --all | <attr>...] [--] <pathname>..."),
12 N_("git check-attr --stdin [-z] [-a | --all | <attr>...]"),
13 NULL
14 };
15
16 static int nul_term_line;
17
18 static const struct option check_attr_options[] = {
19 OPT_BOOL('a', "all", &all_attrs, N_("report all attributes set on file")),
20 OPT_BOOL(0, "cached", &cached_attrs, N_("use .gitattributes only from the index")),
21 OPT_BOOL(0 , "stdin", &stdin_paths, N_("read file names from stdin")),
22 OPT_BOOL('z', NULL, &nul_term_line,
23 N_("terminate input and output records by a NUL 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 if (nul_term_line) {
42 printf("%s%c" /* path */
43 "%s%c" /* attrname */
44 "%s%c" /* attrvalue */,
45 file, 0, git_attr_name(check[j].attr), 0, value, 0);
46 } else {
47 quote_c_style(file, NULL, stdout, 0);
48 printf(": %s: %s\n", git_attr_name(check[j].attr), value);
49 }
50
51 }
52 }
53
54 static void check_attr(const char *prefix, int cnt,
55 struct git_attr_check *check, const char *file)
56 {
57 char *full_path =
58 prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
59 if (check != NULL) {
60 if (git_check_attr(full_path, cnt, check))
61 die("git_check_attr died");
62 output_attr(cnt, check, file);
63 } else {
64 if (git_all_attrs(full_path, &cnt, &check))
65 die("git_all_attrs died");
66 output_attr(cnt, check, file);
67 free(check);
68 }
69 free(full_path);
70 }
71
72 static void check_attr_stdin_paths(const char *prefix, int cnt,
73 struct git_attr_check *check)
74 {
75 struct strbuf buf = STRBUF_INIT;
76 struct strbuf unquoted = STRBUF_INIT;
77 strbuf_getline_fn getline_fn;
78
79 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
80 while (getline_fn(&buf, stdin) != EOF) {
81 if (!nul_term_line && buf.buf[0] == '"') {
82 strbuf_reset(&unquoted);
83 if (unquote_c_style(&unquoted, buf.buf, NULL))
84 die("line is badly quoted");
85 strbuf_swap(&buf, &unquoted);
86 }
87 check_attr(prefix, cnt, check, buf.buf);
88 maybe_flush_or_die(stdout, "attribute to stdout");
89 }
90 strbuf_release(&buf);
91 strbuf_release(&unquoted);
92 }
93
94 static NORETURN void error_with_usage(const char *msg)
95 {
96 error("%s", msg);
97 usage_with_options(check_attr_usage, check_attr_options);
98 }
99
100 int cmd_check_attr(int argc, const char **argv, const char *prefix)
101 {
102 struct git_attr_check *check;
103 int cnt, i, doubledash, filei;
104
105 if (!is_bare_repository())
106 setup_work_tree();
107
108 git_config(git_default_config, NULL);
109
110 argc = parse_options(argc, argv, prefix, check_attr_options,
111 check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
112
113 if (read_cache() < 0) {
114 die("invalid cache");
115 }
116
117 if (cached_attrs)
118 git_attr_set_direction(GIT_ATTR_INDEX, NULL);
119
120 doubledash = -1;
121 for (i = 0; doubledash < 0 && i < argc; i++) {
122 if (!strcmp(argv[i], "--"))
123 doubledash = i;
124 }
125
126 /* Process --all and/or attribute arguments: */
127 if (all_attrs) {
128 if (doubledash >= 1)
129 error_with_usage("Attributes and --all both specified");
130
131 cnt = 0;
132 filei = doubledash + 1;
133 } else if (doubledash == 0) {
134 error_with_usage("No attribute specified");
135 } else if (doubledash < 0) {
136 if (!argc)
137 error_with_usage("No attribute specified");
138
139 if (stdin_paths) {
140 /* Treat all arguments as attribute names. */
141 cnt = argc;
142 filei = argc;
143 } else {
144 /* Treat exactly one argument as an attribute name. */
145 cnt = 1;
146 filei = 1;
147 }
148 } else {
149 cnt = doubledash;
150 filei = doubledash + 1;
151 }
152
153 /* Check file argument(s): */
154 if (stdin_paths) {
155 if (filei < argc)
156 error_with_usage("Can't specify files with --stdin");
157 } else {
158 if (filei >= argc)
159 error_with_usage("No file specified");
160 }
161
162 if (all_attrs) {
163 check = NULL;
164 } else {
165 check = xcalloc(cnt, sizeof(*check));
166 for (i = 0; i < cnt; i++) {
167 const char *name;
168 struct git_attr *a;
169 name = argv[i];
170 a = git_attr(name);
171 if (!a)
172 return error("%s: not a valid attribute name",
173 name);
174 check[i].attr = a;
175 }
176 }
177
178 if (stdin_paths)
179 check_attr_stdin_paths(prefix, cnt, check);
180 else {
181 for (i = filei; i < argc; i++)
182 check_attr(prefix, cnt, check, argv[i]);
183 maybe_flush_or_die(stdout, "attribute to stdout");
184 }
185 return 0;
186 }