modelbuilder: list failed path if module is not found

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

diff --git a/src/modelbuilder.nit b/src/modelbuilder.nit
index 1386781..1c87722 100644 (file)
--- a/src/modelbuilder.nit
+++ b/src/modelbuilder.nit
@@ -220,6 +220,8 @@ class ModelBuilder
                var origmmodule = mmodule
                var modules = model.get_mmodules_by_name(name)
 
+               var tries = new Array[String]
+
                var lastmodule = mmodule
                while mmodule != null do
                        var dirname = mmodule.location.file.filename.dirname
@@ -243,6 +245,7 @@ class ModelBuilder
 
                        # Second, try the directory to find a file
                        var try_file = dirname + "/" + name + ".nit"
+                       tries.add try_file
                        if try_file.file_exists then
                                var res = self.load_module(owner, try_file.simplify_path)
                                if res == null then return null # Forward error
@@ -287,6 +290,7 @@ class ModelBuilder
                var candidate: nullable String = null
                for dirname in lookpaths do
                        var try_file = (dirname + "/" + name + ".nit").simplify_path
+                       tries.add try_file
                        if try_file.file_exists then
                                if candidate == null then
                                        candidate = try_file
@@ -305,9 +309,9 @@ class ModelBuilder
                end
                if candidate == null then
                        if origmmodule != null then
-                               error(anode, "Error: cannot find module {name} from {origmmodule}")
+                               error(anode, "Error: cannot find module {name} from {origmmodule}. tried {tries.join(", ")}")
                        else
-                               error(anode, "Error: cannot find module {name}")
+                               error(anode, "Error: cannot find module {name}. tried {tries.join(", ")}")
                        end
                        return null
                end