Small improvements to ModuleLoadEnvironment

easybuild/framework/easyblock.py

@@ -134,7 +134,7 @@ class LibSymlink(Enum):
     - LIB64_TO_LIB: 'lib64' is a symlink to 'lib'
     - NEITHER: neither 'lib' is a symlink to 'lib64', nor 'lib64' is a symlink to 'lib'
     - """
-    UNKNOWN, LIB_TO_LIB64, LIB64_TO_LIB, NEITHER = range(0, 4)
+    LIB_TO_LIB64, LIB64_TO_LIB, NEITHER = range(3)
 
 
 class EasyBlock(object):
@@ -226,7 +226,7 @@ def __init__(self, ec, logfile=None):
         self.install_subdir = None
 
         # track status of symlink between library directories
-        self.install_lib_symlink = LibSymlink.UNKNOWN
+        self._install_lib_symlink = None
 
         # indicates whether build should be performed in installation dir
         self.build_in_installdir = self.cfg['buildininstalldir']
@@ -311,6 +311,13 @@ def __init__(self, ec, logfile=None):
 
         self.log.info("Init completed for application name %s version %s" % (self.name, self.version))
 
+    @property
+    def install_lib_symlink(self):
+        """Return symlink state of lib/lib64 folders"""
+        if self._install_lib_symlink is None:
+            self.check_install_lib_symlink()
+        return self._install_lib_symlink
+
     def post_init(self):
         """
         Run post-initialization tasks.
@@ -1719,10 +1726,6 @@ def expand_module_search_path(self, search_path, path_type=ModEnvVarType.PATH_WI
         abs_glob = os.path.join(self.installdir, search_path)
         exp_search_paths = [abs_glob] if search_path == "" else glob.glob(abs_glob)
 
-        # Explicitly check symlink state between lib dirs if it is still undefined (e.g. --module-only)
-        if self.install_lib_symlink == LibSymlink.UNKNOWN:
-            self.check_install_lib_symlink()
-
         retained_search_paths = []
         for abs_path in exp_search_paths:
             # return relative paths
@@ -1751,16 +1754,16 @@ def expand_module_search_path(self, search_path, path_type=ModEnvVarType.PATH_WI
         return retained_search_paths
 
     def check_install_lib_symlink(self):
-        """Check symlink state between library directories in installation prefix"""
+        """Update the symlink state between library directories in installation prefix"""
         lib_dir = os.path.join(self.installdir, 'lib')
         lib64_dir = os.path.join(self.installdir, 'lib64')
 
-        self.install_lib_symlink = LibSymlink.NEITHER
+        self._install_lib_symlink = LibSymlink.NEITHER
         if os.path.exists(lib_dir) and os.path.exists(lib64_dir):
             if os.path.islink(lib_dir) and os.path.samefile(lib_dir, lib64_dir):
-                self.install_lib_symlink = LibSymlink.LIB_TO_LIB64
+                self._install_lib_symlink = LibSymlink.LIB_TO_LIB64
             elif os.path.islink(lib64_dir) and os.path.samefile(lib_dir, lib64_dir):
-                self.install_lib_symlink = LibSymlink.LIB64_TO_LIB
+                self._install_lib_symlink = LibSymlink.LIB64_TO_LIB
 
     def make_module_req_guess(self):
         """

easybuild/tools/modules.py

@@ -152,18 +152,15 @@ class ModuleEnvironmentVariable:
     Contents of environment variable is a list of unique strings
     """
 
-    def __init__(self, contents, var_type=None, delim=os.pathsep):
+    def __init__(self, contents, var_type=ModEnvVarType.PATH_WITH_FILES, delim=os.pathsep):
         """
         Initialize new environment variable
         Actual contents of the environment variable are held in self.contents
-        By default, environment variable is a (list of) paths with files in them
+        By default, the environment variable is a list of paths with files in them
         Existence of paths and their contents are not checked at init
         """
         self.contents = contents
         self.delim = delim
-
-        if var_type is None:
-            var_type = ModEnvVarType.PATH_WITH_FILES
         self.type = var_type
 
         self.log = fancylogger.getLogger(self.__class__.__name__, fname=False)
@@ -283,7 +280,7 @@ def __setattr__(self, name, value):
 
         # special variables that require files in their top directories
         if name in ('LD_LIBRARY_PATH', 'PATH'):
-            kwargs.update({'var_type': ModEnvVarType.PATH_WITH_TOP_FILES})
+            kwargs['var_type'] = ModEnvVarType.PATH_WITH_TOP_FILES
 
         return super().__setattr__(name, ModuleEnvironmentVariable(contents, **kwargs))
 
@@ -297,8 +294,7 @@ def items(self):
         - key = attribute name
         - value = its "contents" attribute
         """
-        for attr in self.__dict__:
-            yield attr, getattr(self, attr)
+        return self.__dict__.items()
 
     def update(self, new_env):
         """Update contents of environment from given dictionary"""
@@ -321,10 +317,7 @@ def environ(self):
         Return dict with mapping of ModuleEnvironmentVariables names with their contents
         Equivalent in shape to os.environ
         """
-        mapping = {}
-        for envar_name, envar_contents in self.items():
-            mapping.update({envar_name: str(envar_contents)})
-        return mapping
+        return {envar_name: str(envar_contents) for envar_name, envar_contents in self.items()}
 
 
 class ModulesTool(object):

test/framework/easyblock.py

@@ -439,7 +439,7 @@ def test_make_module_req(self):
         for path in ('bin', ('bin', 'testdir'), 'sbin', 'share', ('share', 'man'), 'lib', 'lib64'):
             path_components = (path, ) if isinstance(path, str) else path
             os.mkdir(os.path.join(eb.installdir, *path_components))
-        eb.install_lib_symlink = LibSymlink.NEITHER
+        eb.check_install_lib_symlink()
 
         write_file(os.path.join(eb.installdir, 'foo.jar'), 'foo.jar')
         write_file(os.path.join(eb.installdir, 'bla.jar'), 'bla.jar')
@@ -505,7 +505,7 @@ def test_make_module_req(self):
         write_file(os.path.join(eb.installdir, 'lib', 'libfoo.so'), 'test')
         shutil.rmtree(os.path.join(eb.installdir, 'lib64'))
         os.symlink('lib', os.path.join(eb.installdir, 'lib64'))
-        eb.install_lib_symlink = LibSymlink.LIB64_TO_LIB
+        eb.check_install_lib_symlink()
         with eb.module_generator.start_module_creation():
             guess = eb.make_module_req()
         if get_module_syntax() == 'Tcl':
@@ -3215,7 +3215,6 @@ def test_expand_module_search_path(self):
         write_file(os.path.join(eb.installdir, 'dir_full_subdirs', 'subdir1', 'file12.txt'), 'test file 1.2')
         write_file(os.path.join(eb.installdir, 'dir_full_subdirs', 'subdir2', 'file21.txt'), 'test file 2.1')
 
-        self.assertEqual(eb.install_lib_symlink, LibSymlink.UNKNOWN)
         eb.check_install_lib_symlink()
         self.assertEqual(eb.install_lib_symlink, LibSymlink.NEITHER)