ccanlint: added --test-dep-graph option

[ccan] / tools / ccanlint / ccanlint.c

diff --git a/tools/ccanlint/ccanlint.c b/tools/ccanlint/ccanlint.c
index ee34dd71438d179fe72999bca15c1967c8e039a8..5b45f4d2f2b2ca7294f7e2859d76cd7409e63b19 100644 (file)
--- a/tools/ccanlint/ccanlint.c
+++ b/tools/ccanlint/ccanlint.c
@@ -344,6 +344,44 @@ static char *list_tests(void *arg)
        exit(0);
 }
 
+static void test_dgraph_vertices(struct list_head *tests, const char *style)
+{
+       const struct ccanlint *i;
+
+       list_for_each(tests, i, list) {
+               /*
+                * todo: escape labels in case ccanlint test keys have
+                *       characters interpreted as GraphViz syntax.
+                */
+               printf("\t\"%p\" [label=\"%s\"%s]\n", i, i->key, style);
+       }
+}
+
+static void test_dgraph_edges(struct list_head *tests)
+{
+       const struct ccanlint *i;
+       const struct dependent *d;
+
+       list_for_each(tests, i, list)
+               list_for_each(&i->dependencies, d, node)
+                       printf("\t\"%p\" -> \"%p\"\n", d->dependent, i);
+}
+
+static char *test_dependency_graph(void *arg)
+{
+       puts("digraph G {");
+
+       test_dgraph_vertices(&compulsory_tests, ", style=filled, fillcolor=yellow");
+       test_dgraph_vertices(&normal_tests,     "");
+
+       test_dgraph_edges(&compulsory_tests);
+       test_dgraph_edges(&normal_tests);
+
+       puts("}");
+
+       exit(0);
+}
+
 /* Remove empty lines. */
 static char **collapse(char **lines, unsigned int *nump)
 {
@@ -451,6 +489,8 @@ int main(int argc, char *argv[])
                         "do not compile anything");
        opt_register_noarg("-l|--list-tests", list_tests, NULL,
                         "list tests ccanlint performs (and exit)");
+       opt_register_noarg("--test-dep-graph", test_dependency_graph, NULL,
+                        "print dependency graph of tests in Graphviz .dot format");
        opt_register_arg("-k|--keep <testname>", keep_test, NULL, NULL,
                           "keep results of <testname> (can be used multiple times)");
        opt_register_noarg("--summary|-s", opt_set_bool, &summary,