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, 3, 4)))
16 lines_from_cmd(const void *ctx, unsigned int *num, 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", num);
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, *errmsg, *ccandir;
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 = temp_file(ctx, ".c");
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';
63 return compile_and_link(ctx, info_c_file, ccandir, "", "", "",
67 static char **get_one_deps(const void *ctx, const char *dir,
68 unsigned int *num, char **infofile)
73 *infofile = compile_info(ctx, dir);
75 errx(1, "Could not compile _info for '%s'", dir);
78 cmd = talloc_asprintf(ctx, "%s depends", *infofile);
79 deps = lines_from_cmd(cmd, num, "%s", cmd);
81 err(1, "Could not run '%s'", cmd);
85 /* Make copy of src, replacing "from" with "to". */
86 static char *replace(const void *ctx, const char *src,
87 const char *from, const char *to)
89 char *ret = talloc_strdup(ctx, "");
90 unsigned int rlen, len, add;
94 const char *next = strstr(src+len, from);
96 add = strlen(src+len) + 1;
98 add = next - (src+len);
100 ret = talloc_realloc(ctx, ret, char, rlen + add + strlen(to)+1);
101 memcpy(ret+rlen, src+len, add);
106 strcpy(ret+rlen, to);
112 /* This is a terrible hack. We scan for ccan/ strings. */
113 static char **get_one_safe_deps(const void *ctx,
118 char **deps, **lines, *raw, *fname;
119 unsigned int i, n = 0;
121 fname = talloc_asprintf(ctx, "%s/_info", dir);
122 raw = grab_file(fname, fname, NULL);
124 errx(1, "Could not open %s", fname);
126 /* Replace \n by actual line breaks, and split it. */
127 lines = strsplit(raw, replace(raw, raw, "\\n", "\n"), "\n", &n);
129 deps = talloc_array(ctx, char *, n+1);
131 for (n = i = 0; lines[i]; i++) {
135 /* Ignore lines starting with # (e.g. #include) */
136 if (lines[i][0] == '#')
139 /* Start of line, or after ". */
140 if (strstarts(lines[i], "ccan/"))
143 str = strstr(lines[i], "\"ccan/");
149 len = strspn(str, "/abcdefghijklmnopqrstuvxwyz12345678980_");
152 deps[n++] = talloc_strndup(deps, str, len);
161 static bool have_dep(char **deps, unsigned int num, const char *dep)
165 for (i = 0; i < num; i++)
166 if (streq(deps[i], dep))
171 /* Gets all the dependencies, recursively. */
173 get_all_deps(const void *ctx, const char *dir,
175 char **(*get_one)(const void *, const char *,
176 unsigned int *, char **))
181 deps = get_one(ctx, dir, &num, infofile);
182 for (i = 0; i < num; i++) {
184 unsigned int j, newnum;
185 char *subinfo = NULL;
188 if (!strstarts(deps[i], "ccan/"))
191 subdir = talloc_asprintf(ctx, "%s/%s",
192 talloc_dirname(ctx, dir),
193 deps[i] + strlen("ccan/"));
194 newdeps = get_one(ctx, subdir, &newnum, &subinfo);
196 /* Should be short, so brute-force out dups. */
197 for (j = 0; j < newnum; j++) {
198 if (have_dep(deps, num, newdeps[j]))
201 deps = talloc_realloc(NULL, deps, char *, num + 2);
202 deps[num++] = newdeps[j];
209 char **get_libs(const void *ctx, const char *dir,
210 unsigned int *num, char **infofile)
215 *infofile = compile_info(ctx, dir);
217 errx(1, "Could not compile _info for '%s'", dir);
220 cmd = talloc_asprintf(ctx, "%s libs", *infofile);
221 libs = lines_from_cmd(cmd, num, "%s", cmd);
223 err(1, "Could not run '%s'", cmd);
227 char **get_deps(const void *ctx, const char *dir,
228 bool recurse, char **infofile)
230 char *temp = NULL, **ret;
236 ret = get_one_deps(ctx, dir, &num, infofile);
238 ret = get_all_deps(ctx, dir, infofile, get_one_deps);
240 if (infofile == &temp && temp) {
247 char **get_safe_ccan_deps(const void *ctx, const char *dir,
248 bool recurse, char **infofile)
252 return get_one_safe_deps(ctx, dir, &num, infofile);
254 return get_all_deps(ctx, dir, infofile, get_one_safe_deps);