+#include <tools/ccanlint/ccanlint.h>
+#include <tools/tools.h>
+#include <ccan/talloc/talloc.h>
+#include <ccan/str/str.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <string.h>
+#include <ctype.h>
+
+static bool expect_obj_file(const char *dir)
+{
+ char *olddir;
+ struct manifest *dep_man;
+ bool has_c_files;
+
+ olddir = talloc_getcwd(dir);
+ if (!olddir)
+ err(1, "Getting current directory");
+
+ /* We will fail below if this doesn't exist. */
+ if (chdir(dir) != 0)
+ return false;
+
+ dep_man = get_manifest(dir);
+ if (chdir(olddir) != 0)
+ err(1, "Returning to original directory '%s'", olddir);
+ talloc_free(olddir);
+
+ /* If it has C files, we expect an object file built from them. */
+ has_c_files = !list_empty(&dep_man->c_files);
+ talloc_free(dep_man);
+ return has_c_files;
+}
+
+/* FIXME: recursive ccanlint if they ask for it. */
+static char *add_dep(char *sofar, struct manifest *m, const char *dep)
+{
+ char *file, *dir;
+ struct stat st;
+ bool need_obj;
+
+ dir = talloc_asprintf(m, "../%s", dep);
+ need_obj = expect_obj_file(dir);
+
+ if (need_obj) {
+ file = talloc_asprintf(m, "../%s.o", dep);
+ if (stat(file, &st) == 0) {
+ struct ccan_file *f = new_ccan_file(m, file);
+ list_add_tail(&m->dep_obj_files, &f->list);
+ return sofar;
+ }
+ }
+
+ if (stat(dir, &st) == 0) {
+ if (!need_obj)
+ return sofar;
+
+ return talloc_asprintf_append(sofar,
+ "ccan/%s: isn't built (no %s)\n",
+ dep, file);
+ }
+
+ return talloc_asprintf_append(sofar,
+ "ccan/%s: could not find directory %s\n",
+ dep, dir);
+}
+
+static void *check_depends(struct manifest *m)
+{
+ unsigned int i;
+ char *report = NULL;
+ char **deps;
+
+ if (safe_mode)
+ deps = get_safe_ccan_deps(m, "..", m->basename, true);
+ else
+ deps = get_deps(m, "..", m->basename, true);
+
+ for (i = 0; deps[i]; i++) {
+ if (!strstarts(deps[i], "ccan/"))
+ continue;
+
+ report = add_dep(report, m, deps[i] + strlen("ccan/"));
+ }
+ return report;
+}
+
+static const char *describe_depends(struct manifest *m, void *check_result)
+{
+ return talloc_asprintf(check_result,
+ "The following dependencies are needed:\n"
+ "%s\n", (char *)check_result);
+}
+
+struct ccanlint depends = {
+ .name = "CCAN dependencies are built",
+ .total_score = 1,
+ .check = check_depends,
+ .describe = describe_depends,
+};
+
+REGISTER_TEST(depends, NULL);