Init extensions before loading (fake) module

The extensions are required by the module creation and will be loaded if
they are not yet.
In `extensions_step` they would then be loaded again.
Avoid this by doing this earlier in `extensions_step`

easybuild/framework/easyblock.py

@@ -2887,6 +2887,13 @@ def extensions_step(self, fetch=False, install=True):
             self.log.debug("No extensions in exts_list")
             return
 
+        self.prepare_for_extensions()
+
+        # we really need a default class
+        if not self.cfg['exts_defaultclass']:
+            raise EasyBuildError("ERROR: No default extension class set for %s", self.name)
+        self.init_ext_instances()
+
         # load fake module
         fake_mod_data = None
         if install and not self.dry_run:
@@ -2898,8 +2905,6 @@ def extensions_step(self, fetch=False, install=True):
 
         start_progress_bar(PROGRESS_BAR_EXTENSIONS, len(self.cfg['exts_list']))
 
-        self.prepare_for_extensions()
-
         if fetch:
             self.update_exts_progress_bar("fetching extension sources/patches")
             self.exts = self.collect_exts_file_info(fetch_files=True)
@@ -2910,13 +2915,6 @@ def extensions_step(self, fetch=False, install=True):
         if install:
             self.log.info("Installing extensions")
 
-        # we really need a default class
-        if not self.cfg['exts_defaultclass'] and fake_mod_data:
-            self.clean_up_fake_module(fake_mod_data)
-            raise EasyBuildError("ERROR: No default extension class set for %s", self.name)
-
-        self.init_ext_instances()
-
         if self.skip:
             self.skip_extensions()
 

test/framework/toy_build.py

@@ -3033,13 +3033,13 @@ def post_run_shell_cmd_hook(cmd, *args, **kwargs):
             ' gcc toy.c -o toy  && copy_toy_file toy copy_of_toy' command failed (exit code 127), but I fixed it!
             in post-install hook for toy v0.0
             bin, lib
-            in module-write hook hook for {mod_name}
             toy 0.0
             ['%(name)s-%(version)s.tar.gz']
             echo toy
             toy 0.0
             ['%(name)s-%(version)s.tar.gz']
             echo toy
+            in module-write hook hook for {mod_name}
             installing of extension bar is done!
             pre_run_shell_cmd_hook triggered for ' gcc toy.c -o toy '
             ' gcc toy.c -o toy  && copy_toy_file toy copy_of_toy' command failed (exit code 127), but I fixed it!