1 #include <ccan/talloc/talloc.h>
2 #include <ccan/str/str.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>
15 static char ** __attribute__((format(printf, 2, 3)))
16 lines_from_cmd(const void *ctx, char *format, ...)
23 cmd = talloc_vasprintf(ctx, format, ap);
28 err(1, "Executing '%s'", cmd);
30 buffer = grab_fd(ctx, fileno(p), NULL);
32 err(1, "Reading from '%s'", cmd);
35 return strsplit(ctx, buffer, "\n");
38 /* Be careful about trying to compile over running programs (parallel make).
39 * temp_file helps here. */
40 static char *compile_info(const void *ctx, const char *dir)
42 char *info_c_file, *info, *ccandir, *compiled, *output;
46 /* Copy it to a file with proper .c suffix. */
47 info = grab_file(ctx, talloc_asprintf(ctx, "%s/_info", dir), &len);
51 info_c_file = maybe_temp_file(ctx, ".c", false, "_info");
52 fd = open(info_c_file, O_WRONLY|O_CREAT|O_EXCL, 0600);
55 if (!write_all(fd, info, len))
61 ccandir = talloc_dirname(ctx, dir);
62 *strrchr(ccandir, '/') = '\0';
64 compiled = maybe_temp_file(ctx, "", false, "info");
65 if (compile_and_link(ctx, info_c_file, ccandir, "", "", "",
71 static char **get_one_deps(const void *ctx, const char *dir,
72 unsigned int *num, char **infofile)
77 *infofile = compile_info(ctx, dir);
79 errx(1, "Could not compile _info for '%s'", dir);
82 cmd = talloc_asprintf(ctx, "%s depends", *infofile);
83 deps = lines_from_cmd(cmd, "%s", cmd);
85 err(1, "Could not run '%s'", cmd);
86 /* FIXME: Do we need num arg? */
87 *num = talloc_array_length(deps) - 1;
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,
124 char **deps, **lines, *raw, *fname;
127 fname = talloc_asprintf(ctx, "%s/_info", dir);
128 raw = grab_file(fname, fname, NULL);
130 errx(1, "Could not open %s", fname);
132 /* Replace \n by actual line breaks, and split it. */
133 lines = strsplit(raw, replace(raw, raw, "\\n", "\n"), "\n");
135 deps = talloc_array(ctx, char *, talloc_array_length(lines));
137 for (n = i = 0; lines[i]; i++) {
141 /* Ignore lines starting with # (e.g. #include) */
142 if (lines[i][0] == '#')
145 /* Start of line, or after ". */
146 if (strstarts(lines[i], "ccan/"))
149 str = strstr(lines[i], "\"ccan/");
155 len = strspn(str, "/abcdefghijklmnopqrstuvxwyz12345678980_");
158 deps[n++] = talloc_strndup(deps, str, len);
167 static bool have_dep(char **deps, unsigned int num, const char *dep)
171 for (i = 0; i < num; i++)
172 if (streq(deps[i], dep))
177 /* Gets all the dependencies, recursively. */
179 get_all_deps(const void *ctx, const char *dir,
181 char **(*get_one)(const void *, const char *,
182 unsigned int *, char **))
187 deps = get_one(ctx, dir, &num, infofile);
188 for (i = 0; i < num; i++) {
190 unsigned int j, newnum;
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, &newnum, &subinfo);
202 /* Should be short, so brute-force out dups. */
203 for (j = 0; j < newnum; j++) {
204 if (have_dep(deps, num, newdeps[j]))
207 deps = talloc_realloc(NULL, deps, char *, num + 2);
208 deps[num++] = newdeps[j];
215 char **get_libs(const void *ctx, const char *dir,
216 unsigned int *num, char **infofile)
221 *infofile = compile_info(ctx, dir);
223 errx(1, "Could not compile _info for '%s'", dir);
226 cmd = talloc_asprintf(ctx, "%s libs", *infofile);
227 libs = lines_from_cmd(cmd, "%s", cmd);
229 err(1, "Could not run '%s'", cmd);
230 /* FIXME: Do we need num arg? */
231 *num = talloc_array_length(libs) - 1;
235 char **get_deps(const void *ctx, const char *dir,
236 bool recurse, char **infofile)
238 char *temp = NULL, **ret;
244 ret = get_one_deps(ctx, dir, &num, infofile);
246 ret = get_all_deps(ctx, dir, infofile, get_one_deps);
248 if (infofile == &temp && temp) {
255 char **get_safe_ccan_deps(const void *ctx, const char *dir,
256 bool recurse, char **infofile)
260 return get_one_safe_deps(ctx, dir, &num, infofile);
262 return get_all_deps(ctx, dir, infofile, get_one_safe_deps);