Allow expansion of environment variables in paths

kibot/config_reader.py

@@ -357,6 +357,7 @@ class CfgYamlReader(object):
                     config_error("`import` entry without `file` ({})".format(str(entry)))
             else:
                 config_error("`import` items must be strings or dicts ({})".format(str(entry)))
+            fn = os.path.expandvars(os.path.expanduser(fn))
             if not os.path.isabs(fn):
                 fn = os.path.join(dir, fn)
             if not os.path.isfile(fn):

kibot/out_kibom.py

@@ -378,7 +378,9 @@ class KiBoMOptions(BaseOptions):
         kibom_command = self.ensure_tool('KiBoM')
         format = self.format.lower()
         prj = GS.sch_no_ext
-        config = os.path.join(GS.sch_dir, self.conf)
+        config = os.path.expandvars(os.path.expanduser(self.conf))
+        if not os.path.isabs(config):
+            config = os.path.join(GS.sch_dir, config)
         if self.output:
             force_output = True
             output = name