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