ccanlint: license_depends_compat checks dependencies are compatible.

We don't check external dependencies, but internal ccan deps are
pretty easy.

diff --git a/tools/ccanlint/tests/license_depends_compat.c b/tools/ccanlint/tests/license_depends_compat.c
new file mode 100644 (file)
index 0000000..c4f4cb7
--- /dev/null
+++ b/tools/ccanlint/tests/license_depends_compat.c
@@ -0,0 +1,56 @@
+#include <tools/ccanlint/ccanlint.h>
+#include <ccan/foreach/foreach.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 <ccan/talloc/talloc.h>
+#include <ccan/str/str.h>
+#include <ccan/str_talloc/str_talloc.h>
+
+static void check_license_depends_compat(struct manifest *m,
+                                        bool keep,
+                                        unsigned int *timeleft,
+                                        struct score *score)
+{
+       struct manifest *i;
+
+       score->pass = true;
+
+       /* If our license is unknown, we can't know the answer. */
+       if (m->license == LICENSE_UNKNOWN) {
+               score->score = score->total = 0;
+               return;
+       }
+
+       list_for_each(&m->deps, i, list) {
+               struct doc_section *d = find_license_tag(i);
+               i->license = which_license(d);
+
+               if (i->license != LICENSE_UNKNOWN
+                   && !license_compatible[m->license][i->license]) {
+                       score_file_error(score, i->info_file, 0,
+                                        "Dependency ccan/%s has"
+                                        " incompatible license '%s'",
+                                        i->basename,
+                                        licenses[i->license].name);
+                       score->pass = false;
+               }
+       }
+
+       if (score->pass)
+               score->score = score->total;
+}
+
+struct ccanlint license_depends_compat = {
+       .key = "license_depends_compat",
+       .name = "CCAN dependencies don't contain incompatible licenses",
+       .check = check_license_depends_compat,
+       .needs = "license_exists depends_exist"
+};
+REGISTER_TEST(license_depends_compat);