1 #include <ccan/str/str.h>
2 #include <ccan/talloc/talloc.h>
3 #include <ccan/grab_file/grab_file.h>
4 #include <ccan/str_talloc/str_talloc.h>
5 #include <ccan/read_write_all/read_write_all.h>
6 #include <ccan/compiler/compiler.h>
16 static char ** PRINTF_FMT(2, 3)
17 lines_from_cmd(const void *ctx, const char *format, ...)
24 cmd = talloc_vasprintf(ctx, format, ap);
29 err(1, "Executing '%s'", cmd);
31 buffer = grab_fd(ctx, fileno(p), NULL);
33 err(1, "Reading from '%s'", cmd);
36 return strsplit(ctx, buffer, "\n");
39 /* Be careful about trying to compile over running programs (parallel make).
40 * temp_file helps here. */
41 static char *compile_info(const void *ctx, const char *dir)
43 char *info_c_file, *info, *ccandir, *compiled, *output;
47 /* Copy it to a file with proper .c suffix. */
48 info = grab_file(ctx, talloc_asprintf(ctx, "%s/_info", dir), &len);
52 info_c_file = temp_file(ctx, ".c", "_info");
53 fd = open(info_c_file, O_WRONLY|O_CREAT|O_EXCL, 0600);
56 if (!write_all(fd, info, len))
62 ccandir = talloc_dirname(ctx, dir);
63 if (strrchr(ccandir, '/'))
64 *strrchr(ccandir, '/') = '\0';
66 compiled = temp_file(ctx, "", "info");
67 if (compile_and_link(ctx, info_c_file, ccandir, "",
68 CCAN_COMPILER, CCAN_CFLAGS " -I.", "",
74 static char **get_one_deps(const void *ctx, const char *dir, char **infofile)
79 *infofile = compile_info(ctx, dir);
81 errx(1, "Could not compile _info for '%s'", dir);
84 cmd = talloc_asprintf(ctx, "%s depends", *infofile);
85 deps = lines_from_cmd(cmd, "%s", cmd);
87 err(1, "Could not run '%s'", cmd);
91 /* Make copy of src, replacing "from" with "to". */
92 static char *replace(const void *ctx, const char *src,
93 const char *from, const char *to)
95 char *ret = talloc_strdup(ctx, "");
96 unsigned int rlen, len, add;
100 const char *next = strstr(src+len, from);
102 add = strlen(src+len) + 1;
104 add = next - (src+len);
106 ret = talloc_realloc(ctx, ret, char, rlen + add + strlen(to)+1);
107 memcpy(ret+rlen, src+len, add);
112 strcpy(ret+rlen, to);
118 /* This is a terrible hack. We scan for ccan/ strings. */
119 static char **get_one_safe_deps(const void *ctx,
123 char **deps, **lines, *raw, *fname;
126 fname = talloc_asprintf(ctx, "%s/_info", dir);
127 raw = grab_file(fname, fname, NULL);
129 errx(1, "Could not open %s", fname);
131 /* Replace \n by actual line breaks, and split it. */
132 lines = strsplit(raw, replace(raw, raw, "\\n", "\n"), "\n");
134 deps = talloc_array(ctx, char *, talloc_array_length(lines));
136 for (n = i = 0; lines[i]; i++) {
140 /* Ignore lines starting with # (e.g. #include) */
141 if (lines[i][0] == '#')
144 /* Start of line, or after ". */
145 if (strstarts(lines[i], "ccan/"))
148 str = strstr(lines[i], "\"ccan/");
154 len = strspn(str, "/abcdefghijklmnopqrstuvxwyz12345678980_");
157 deps[n++] = talloc_strndup(deps, str, len);
162 /* Make sure talloc_array_length() works */
163 return talloc_realloc(NULL, deps, char *, n + 1);
166 static bool have_dep(char **deps, const char *dep)
170 for (i = 0; deps[i]; i++)
171 if (streq(deps[i], dep))
178 /* Gets all the dependencies, recursively. */
180 get_all_deps(const void *ctx, const char *dir,
182 char **(*get_one)(const void *, const char *, char **))
187 deps = get_one(ctx, dir, infofile);
188 for (i = 0; i < talloc_array_length(deps)-1; i++) {
191 char *subinfo = NULL;
194 if (!strstarts(deps[i], "ccan/"))
197 subdir = talloc_asprintf(ctx, "%s/%s",
198 talloc_dirname(ctx, dir),
199 deps[i] + strlen("ccan/"));
200 newdeps = get_one(ctx, subdir, &subinfo);
202 /* Should be short, so brute-force out dups. */
203 for (j = 0; j < talloc_array_length(newdeps)-1; j++) {
206 if (have_dep(deps, newdeps[j]))
209 num = talloc_array_length(deps)-1;
210 deps = talloc_realloc(NULL, deps, char *, num + 2);
211 deps[num] = newdeps[j];
218 char **get_libs(const void *ctx, const char *dir,
219 unsigned int *num, char **infofile)
224 *infofile = compile_info(ctx, dir);
226 errx(1, "Could not compile _info for '%s'", dir);
229 cmd = talloc_asprintf(ctx, "%s libs", *infofile);
230 libs = lines_from_cmd(cmd, "%s", cmd);
232 err(1, "Could not run '%s'", cmd);
233 /* FIXME: Do we need num arg? */
234 *num = talloc_array_length(libs) - 1;
238 /* FIXME: This is O(n^2), which is dumb. */
239 static char **uniquify_deps(char **deps)
241 unsigned int i, j, num;
243 num = talloc_array_length(deps) - 1;
244 for (i = 0; i < num; i++) {
245 for (j = i + 1; j < num; j++) {
246 if (streq(deps[i], deps[j])) {
247 memmove(&deps[j], &deps[j+1],
248 (num - j - 1) * sizeof(char *));
254 /* Make sure talloc_array_length() works */
255 return talloc_realloc(NULL, deps, char *, num + 1);
258 char **get_deps(const void *ctx, const char *dir,
259 bool recurse, char **infofile)
261 char *temp = NULL, **ret;
266 ret = get_one_deps(ctx, dir, infofile);
268 ret = get_all_deps(ctx, dir, infofile, get_one_deps);
270 if (infofile == &temp && temp) {
274 return uniquify_deps(ret);
277 char **get_safe_ccan_deps(const void *ctx, const char *dir,
282 ret = get_one_safe_deps(ctx, dir, NULL);
284 ret = get_all_deps(ctx, dir, NULL, get_one_safe_deps);
286 return uniquify_deps(ret);