-#include "talloc/talloc.h"
+#include <ccan/str/str.h>
+#include <ccan/talloc/talloc.h>
+#include <ccan/grab_file/grab_file.h>
+#include <ccan/str_talloc/str_talloc.h>
+#include <ccan/read_write_all/read_write_all.h>
#include "tools.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <err.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <errno.h>
static char ** __attribute__((format(printf, 2, 3)))
-lines_from_cmd(const void *ctx, char *format, ...)
+lines_from_cmd(const void *ctx, const char *format, ...)
{
va_list ap;
char *cmd, *buffer;
if (!p)
err(1, "Executing '%s'", cmd);
- buffer = grab_fd(ctx, fileno(p));
+ buffer = grab_fd(ctx, fileno(p), NULL);
if (!buffer)
err(1, "Reading from '%s'", cmd);
pclose(p);
- return split(ctx, buffer, "\n", NULL);
+ return strsplit(ctx, buffer, "\n");
}
-static char *build_info(const void *ctx, const char *dir)
+/* Be careful about trying to compile over running programs (parallel make).
+ * temp_file helps here. */
+static char *compile_info(const void *ctx, const char *dir)
{
- char *file, *cfile, *cmd;
+ char *info_c_file, *info, *ccandir, *compiled, *output;
+ size_t len;
+ int fd;
- cfile = talloc_asprintf(ctx, "%s/%s", dir, "_info.c");
- file = talloc_asprintf(cfile, "%s/%s", dir, "_info");
- cmd = talloc_asprintf(file, "gcc " CFLAGS " -o %s %s", file, cfile);
- if (system(cmd) != 0)
- errx(1, "Failed to compile %s", file);
+ /* Copy it to a file with proper .c suffix. */
+ info = grab_file(ctx, talloc_asprintf(ctx, "%s/_info", dir), &len);
+ if (!info)
+ return NULL;
- return file;
+ info_c_file = maybe_temp_file(ctx, ".c", false, "_info");
+ fd = open(info_c_file, O_WRONLY|O_CREAT|O_EXCL, 0600);
+ if (fd < 0)
+ return NULL;
+ if (!write_all(fd, info, len))
+ return NULL;
+
+ if (close(fd) != 0)
+ return NULL;
+
+ ccandir = talloc_dirname(ctx, dir);
+ if (strrchr(ccandir, '/'))
+ *strrchr(ccandir, '/') = '\0';
+
+ compiled = maybe_temp_file(ctx, "", false, "info");
+ if (compile_and_link(ctx, info_c_file, ccandir, "",
+ CCAN_COMPILER, CCAN_CFLAGS " -I.", "",
+ compiled, &output))
+ return compiled;
+ return NULL;
}
-char **get_deps(const void *ctx, const char *dir)
+static char **get_one_deps(const void *ctx, const char *dir, char **infofile)
{
char **deps, *cmd;
- cmd = talloc_asprintf(ctx, "%s depends", build_info(ctx, dir));
- deps = lines_from_cmd(cmd, cmd);
+ if (!*infofile) {
+ *infofile = compile_info(ctx, dir);
+ if (!*infofile)
+ errx(1, "Could not compile _info for '%s'", dir);
+ }
+
+ cmd = talloc_asprintf(ctx, "%s depends", *infofile);
+ deps = lines_from_cmd(cmd, "%s", cmd);
if (!deps)
err(1, "Could not run '%s'", cmd);
return deps;
}
+/* Make copy of src, replacing "from" with "to". */
+static char *replace(const void *ctx, const char *src,
+ const char *from, const char *to)
+{
+ char *ret = talloc_strdup(ctx, "");
+ unsigned int rlen, len, add;
+
+ rlen = len = 0;
+ for (;;) {
+ const char *next = strstr(src+len, from);
+ if (!next)
+ add = strlen(src+len) + 1;
+ else
+ add = next - (src+len);
+
+ ret = talloc_realloc(ctx, ret, char, rlen + add + strlen(to)+1);
+ memcpy(ret+rlen, src+len, add);
+ if (!next)
+ return ret;
+ len += add;
+ rlen += add;
+ strcpy(ret+rlen, to);
+ rlen += strlen(to);
+ len += strlen(from);
+ }
+}
+
+/* This is a terrible hack. We scan for ccan/ strings. */
+static char **get_one_safe_deps(const void *ctx,
+ const char *dir,
+ char **infofile)
+{
+ char **deps, **lines, *raw, *fname;
+ unsigned int i, n;
+
+ fname = talloc_asprintf(ctx, "%s/_info", dir);
+ raw = grab_file(fname, fname, NULL);
+ if (!raw)
+ errx(1, "Could not open %s", fname);
+
+ /* Replace \n by actual line breaks, and split it. */
+ lines = strsplit(raw, replace(raw, raw, "\\n", "\n"), "\n");
+
+ deps = talloc_array(ctx, char *, talloc_array_length(lines));
+
+ for (n = i = 0; lines[i]; i++) {
+ char *str;
+ unsigned int len;
+
+ /* Ignore lines starting with # (e.g. #include) */
+ if (lines[i][0] == '#')
+ continue;
+
+ /* Start of line, or after ". */
+ if (strstarts(lines[i], "ccan/"))
+ str = lines[i];
+ else {
+ str = strstr(lines[i], "\"ccan/");
+ if (!str)
+ continue;
+ str++;
+ }
+
+ len = strspn(str, "/abcdefghijklmnopqrstuvxwyz12345678980_");
+ if (len == 5)
+ continue;
+ deps[n++] = talloc_strndup(deps, str, len);
+ }
+ deps[n] = NULL;
+ talloc_free(fname);
+
+ /* Make sure talloc_array_length() works */
+ return talloc_realloc(NULL, deps, char *, n + 1);
+}
+
+static bool have_dep(char **deps, const char *dep)
+{
+ unsigned int i;
+
+ for (i = 0; deps[i]; i++)
+ if (streq(deps[i], dep))
+ return true;
+ return false;
+}
+
+
+
+/* Gets all the dependencies, recursively. */
+static char **
+get_all_deps(const void *ctx, const char *dir,
+ char **infofile,
+ char **(*get_one)(const void *, const char *, char **))
+{
+ char **deps;
+ unsigned int i;
+
+ deps = get_one(ctx, dir, infofile);
+ for (i = 0; i < talloc_array_length(deps)-1; i++) {
+ char **newdeps;
+ unsigned int j;
+ char *subinfo = NULL;
+ char *subdir;
+
+ if (!strstarts(deps[i], "ccan/"))
+ continue;
+
+ subdir = talloc_asprintf(ctx, "%s/%s",
+ talloc_dirname(ctx, dir),
+ deps[i] + strlen("ccan/"));
+ newdeps = get_one(ctx, subdir, &subinfo);
+
+ /* Should be short, so brute-force out dups. */
+ for (j = 0; j < talloc_array_length(newdeps)-1; j++) {
+ unsigned int num;
+
+ if (have_dep(deps, newdeps[j]))
+ continue;
+
+ num = talloc_array_length(deps)-1;
+ deps = talloc_realloc(NULL, deps, char *, num + 2);
+ deps[num] = newdeps[j];
+ deps[num+1] = NULL;
+ }
+ }
+ return deps;
+}
+
+char **get_libs(const void *ctx, const char *dir,
+ unsigned int *num, char **infofile)
+{
+ char **libs, *cmd;
+
+ if (!*infofile) {
+ *infofile = compile_info(ctx, dir);
+ if (!*infofile)
+ errx(1, "Could not compile _info for '%s'", dir);
+ }
+
+ cmd = talloc_asprintf(ctx, "%s libs", *infofile);
+ libs = lines_from_cmd(cmd, "%s", cmd);
+ if (!libs)
+ err(1, "Could not run '%s'", cmd);
+ /* FIXME: Do we need num arg? */
+ *num = talloc_array_length(libs) - 1;
+ return libs;
+}
+
+/* FIXME: This is O(n^2), which is dumb. */
+static char **uniquify_deps(char **deps)
+{
+ unsigned int i, j, num;
+
+ num = talloc_array_length(deps) - 1;
+ for (i = 0; i < num; i++) {
+ for (j = i + 1; j < num; j++) {
+ if (streq(deps[i], deps[j])) {
+ memmove(&deps[j], &deps[j+1],
+ (num - j - 1) * sizeof(char *));
+ num--;
+ }
+ }
+ }
+ deps[num] = NULL;
+ /* Make sure talloc_array_length() works */
+ return talloc_realloc(NULL, deps, char *, num + 1);
+}
+
+char **get_deps(const void *ctx, const char *dir,
+ bool recurse, char **infofile)
+{
+ char *temp = NULL, **ret;
+ if (!infofile)
+ infofile = &temp;
+
+ if (!recurse) {
+ ret = get_one_deps(ctx, dir, infofile);
+ } else
+ ret = get_all_deps(ctx, dir, infofile, get_one_deps);
+
+ if (infofile == &temp && temp) {
+ unlink(temp);
+ talloc_free(temp);
+ }
+ return uniquify_deps(ret);
+}
+
+char **get_safe_ccan_deps(const void *ctx, const char *dir,
+ bool recurse)
+{
+ char **ret;
+ if (!recurse) {
+ ret = get_one_safe_deps(ctx, dir, NULL);
+ } else {
+ ret = get_all_deps(ctx, dir, NULL, get_one_safe_deps);
+ }
+ return uniquify_deps(ret);
+}
projects / ccan / blobdiff