model_viz: handle groups without filepaths.

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/model/model_viz.nit b/src/model/model_viz.nit
index d516da7..9735136 100644 (file)
--- a/src/model/model_viz.nit
+++ b/src/model/model_viz.nit
@@ -27,7 +27,7 @@ class MPackageTree
 
        redef fun display(a) do
                if a isa MGroup then
-                       if a.parent == null then return "{a.mpackage.name} ({a.filepath.to_s})"
+                       if a.parent == null then return "{a.mpackage.name} ({a.filepath or else "?"})"
                        return a.name + " (group)"
                else if a isa MModule then
                        return a.name
@@ -165,7 +165,7 @@ class MPackageDot
                if mgroup.parent == null then
                        # is is a root group, so display the package
                        if package_group then
-                               o.write("subgraph cluster_{mgroup.object_id} \{\nlabel=\"{mgroup.mpackage.name}\\n({mgroup.filepath.to_s})\"\ncolor=black\nstyle=dotted\n")
+                               o.write("subgraph cluster_{mgroup.object_id} \{\nlabel=\"{mgroup.mpackage.name}\\n({mgroup.filepath or else "?"})\"\ncolor=black\nstyle=dotted\n")
                        end
                else
                        if cluster_group then