1 #include <ccan/str/str.h>
2 #include <ccan/read_write_all/read_write_all.h>
3 #include <ccan/rbuf/rbuf.h>
4 #include <ccan/tal/path/path.h>
5 #include <ccan/compiler/compiler.h>
6 #include <ccan/err/err.h>
15 static char ** PRINTF_FMT(2, 3)
16 lines_from_cmd(const void *ctx, const char *format, ...)
24 cmd = tal_vfmt(ctx, format, ap);
29 err(1, "Executing '%s'", cmd);
31 /* FIXME: Use rbuf_read_str(&in, '\n') rather than strsplit! */
32 rbuf_init(&in, fileno(p), tal_arr(ctx, char, 0), 0);
33 if (!rbuf_read_str(&in, 0, do_tal_realloc) && errno)
34 err(1, "Reading from '%s'", cmd);
37 return tal_strsplit(ctx, in.buf, "\n", STR_EMPTY_OK);
40 /* Be careful about trying to compile over running programs (parallel make).
41 * temp_file helps here. */
42 char *compile_info(const void *ctx, const char *dir)
44 char *info_c_file, *info, *compiled, *output;
48 /* Copy it to a file with proper .c suffix. */
49 info = tal_grab_file(ctx, tal_fmt(ctx, "%s/_info", dir), &len);
53 info_c_file = temp_file(ctx, ".c", "_info");
54 fd = open(info_c_file, O_WRONLY|O_CREAT|O_EXCL, 0600);
57 if (!write_all(fd, info, len))
63 compiled = temp_file(ctx, "", "info");
64 if (compile_and_link(ctx, info_c_file, find_ccan_dir(dir), "",
65 CCAN_COMPILER, CCAN_CFLAGS " -I.", "",
71 static char **get_one_deps(const void *ctx, const char *dir, const char *style,
72 char *(*get_info)(const void *ctx, const char *dir))
75 char *infofile = get_info(ctx, dir);
80 cmd = tal_fmt(ctx, "%s %s", infofile, style);
81 deps = lines_from_cmd(cmd, "%s", cmd);
83 /* You must understand depends, maybe not testdepends. */
84 if (streq(style, "depends"))
85 err(1, "Could not run '%s'", cmd);
86 deps = tal(ctx, char *);
92 /* Make copy of src, replacing "from" with "to". */
93 static char *replace(const void *ctx, const char *src,
94 const char *from, const char *to)
96 char *ret = tal_strdup(ctx, "");
97 unsigned int rlen, len, add;
101 const char *next = strstr(src+len, from);
103 add = strlen(src+len) + 1;
105 add = next - (src+len);
107 tal_resize(&ret, rlen + add + strlen(to)+1);
108 memcpy(ret+rlen, src+len, add);
113 strcpy(ret+rlen, to);
119 /* This is a terrible hack. We scan for ccan/ strings. */
120 static char **get_one_safe_deps(const void *ctx,
123 char *(*unused)(const void *, const char *))
125 char **deps, **lines, *raw, *fname;
127 bool correct_style = false;
129 fname = path_join(ctx, dir, "_info");
130 raw = tal_grab_file(fname, fname, NULL);
132 errx(1, "Could not open %s", fname);
134 /* Replace \n by actual line breaks, and split it. */
135 lines = tal_strsplit(raw, replace(raw, raw, "\\n", "\n"), "\n",
138 deps = tal_arr(ctx, char *, tal_count(lines));
140 for (n = i = 0; lines[i]; i++) {
144 /* Ignore lines starting with # (e.g. #include) */
145 if (lines[i][0] == '#')
148 if (strstr(lines[i], "\"testdepends\""))
149 correct_style = streq(style, "testdepends");
150 else if (strstr(lines[i], "\"depends\""))
151 correct_style = streq(style, "depends");
156 /* Start of line, or after ". */
157 if (strstarts(lines[i], "ccan/"))
160 str = strstr(lines[i], "\"ccan/");
166 len = strspn(str, "/abcdefghijklmnopqrstuvxwyz12345678980_");
169 deps[n++] = tal_strndup(deps, str, len);
174 /* Make sure tal_array_length() works */
175 tal_resize(&deps, n + 1);
179 static bool have_dep(char **deps, const char *dep)
183 for (i = 0; deps[i]; i++)
184 if (streq(deps[i], dep))
191 /* Gets all the dependencies, recursively. */
193 get_all_deps(const void *ctx, const char *dir, const char *style,
194 char *(*get_info)(const void *ctx, const char *dir),
195 char **(*get_one)(const void *, const char *, const char *,
196 char *(*get_info)(const void *, const char *)))
201 deps = get_one(ctx, dir, style, get_info);
202 for (i = 0; i < tal_count(deps)-1; i++) {
207 if (!strstarts(deps[i], "ccan/"))
210 subdir = path_join(ctx, find_ccan_dir(dir), deps[i]);
211 newdeps = get_one(ctx, subdir, "depends", get_info);
213 /* Should be short, so brute-force out dups. */
214 for (j = 0; j < tal_count(newdeps)-1; j++) {
217 if (have_dep(deps, newdeps[j]))
220 num = tal_count(deps)-1;
221 tal_resize(&deps, num + 2);
222 deps[num] = newdeps[j];
229 /* Can return NULL: _info may not support 'libs'. */
230 static char **get_one_libs(const void *ctx, const char *dir,
231 char *(*get_info)(const void *ctx, const char *dir))
235 cmd = tal_fmt(ctx, "%s libs", get_info(ctx, dir));
236 lines = lines_from_cmd(cmd, "%s", cmd);
237 /* Strip final NULL. */
239 tal_resize(&lines, tal_count(lines)-1);
243 /* O(n^2) but n is small. */
244 static char **add_deps(char **deps1, char **deps2)
248 len = tal_count(deps1);
250 for (i = 0; deps2[i]; i++) {
251 if (have_dep(deps1, deps2[i]))
253 tal_resize(&deps1, len + 1);
254 deps1[len-1] = tal_strdup(deps1, deps2[i]);
260 char **get_libs(const void *ctx, const char *dir, const char *style,
261 char *(*get_info)(const void *ctx, const char *dir))
266 libs = get_one_libs(ctx, dir, get_info);
267 len = tal_count(libs);
270 deps = get_deps(ctx, dir, style, true, get_info);
271 if (streq(style, "testdepends"))
272 deps = add_deps(deps,
273 get_deps(ctx, dir, "depends", true,
276 for (i = 0; deps[i]; i++) {
277 char **newlibs, *subdir;
280 if (!strstarts(deps[i], "ccan/"))
283 subdir = path_join(ctx, find_ccan_dir(dir), deps[i]);
285 newlibs = get_one_libs(ctx, subdir, get_info);
286 newlen = tal_count(newlibs);
287 tal_resize(&libs, len + newlen);
288 memcpy(&libs[len], newlibs,
289 sizeof(newlibs[0])*newlen);
294 /* Append NULL entry. */
295 tal_resize(&libs, len + 1);
300 /* FIXME: This is O(n^2), which is dumb. */
301 static char **uniquify_deps(char **deps)
303 unsigned int i, j, num;
308 num = tal_count(deps) - 1;
309 for (i = 0; i < num; i++) {
310 for (j = i + 1; j < num; j++) {
311 if (streq(deps[i], deps[j])) {
312 memmove(&deps[j], &deps[j+1],
313 (num - j - 1) * sizeof(char *));
319 /* Make sure tal_count() works */
320 tal_resize(&deps, num + 1);
324 char **get_deps(const void *ctx, const char *dir, const char *style,
326 char *(*get_info)(const void *ctx, const char *dir))
331 ret = get_one_deps(ctx, dir, style, get_info);
333 ret = get_all_deps(ctx, dir, style, get_info, get_one_deps);
335 return uniquify_deps(ret);
338 char **get_safe_ccan_deps(const void *ctx, const char *dir, const char *style,
343 ret = get_one_safe_deps(ctx, dir, style, NULL);
345 ret = get_all_deps(ctx, dir, style, NULL, get_one_safe_deps);
347 return uniquify_deps(ret);