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