Module path parsing: CRAY_LD_LIBRARY_PATH and PACKAGE_DIR (#9374)

Fix two bugs with module file parsing:

* Detection of the CRAY_LD_LIBRARY_PATH variable was broken by #9100.
  This fixes it and adds a test for it.
* For module names like "foo-bar/1.0", the associated PACKAGE_DIR
  environment variable name would be "FOO_BAR_DIR", but Spack was not
  parsing the components and not converting "-" to "_"

lib/spack/spack/test/module_parsing.py

@@ -58,6 +58,7 @@ def save_env():
 
 def test_get_path_from_module(save_env):
     lines = ['prepend-path LD_LIBRARY_PATH /path/to/lib',
+             'prepend-path CRAY_LD_LIBRARY_PATH /path/to/lib',
              'setenv MOD_DIR /path/to',
              'setenv LDFLAGS -Wl,-rpath/path/to/lib',
              'setenv LDFLAGS -L/path/to/lib',
@@ -67,7 +68,6 @@ def test_get_path_from_module(save_env):
         module_func = '() { eval `echo ' + line + ' bash filler`\n}'
         os.environ['BASH_FUNC_module()'] = module_func
         path = get_path_from_module('mod')
-
         assert path == '/path/to'
 
     os.environ['BASH_FUNC_module()'] = '() { eval $(echo fill bash $*)\n}'
@@ -77,6 +77,8 @@ def test_get_path_from_module(save_env):
 
 
 def test_get_path_from_module_contents():
+    # A line with "MODULEPATH" appears early on, and the test confirms that it
+    # is not extracted as the package's path
     module_show_output = """
 os.environ["MODULEPATH"] = "/path/to/modules1:/path/to/modules2";
 ----------------------------------------------------------------------------
@@ -96,6 +98,16 @@ def test_get_path_from_module_contents():
             '/path/to/cmake-3.9.2')
 
 
+def test_pkg_dir_from_module_name():
+    module_show_lines = ['setenv FOO_BAR_DIR /path/to/foo-bar']
+
+    assert (get_path_from_module_contents(module_show_lines, 'foo-bar') ==
+            '/path/to/foo-bar')
+
+    assert (get_path_from_module_contents(module_show_lines, 'foo-bar/1.0') ==
+            '/path/to/foo-bar')
+
+
 def test_get_argument_from_module_line():
     lines = ['prepend-path LD_LIBRARY_PATH /lib/path',
              'prepend-path  LD_LIBRARY_PATH  /lib/path',

lib/spack/spack/util/module_cmd.py

@@ -185,16 +185,25 @@ def get_path_from_module(mod):
 
 
 def get_path_from_module_contents(text, module_name):
+    tty.debug("Module name: " + module_name)
+    pkg_var_prefix = module_name.replace('-', '_').upper()
+    components = pkg_var_prefix.split('/')
+    # For modules with multiple components like foo/1.0.1, retrieve the package
+    # name "foo" from the module name
+    if len(components) > 1:
+        pkg_var_prefix = components[-2]
+    tty.debug("Package directory variable prefix: " + pkg_var_prefix)
+
     # If it sets the LD_LIBRARY_PATH or CRAY_LD_LIBRARY_PATH, use that
     for line in text:
-        pattern = r'\WLD_LIBRARY_PATH'
+        pattern = r'\W(CRAY_)?LD_LIBRARY_PATH'
         if re.search(pattern, line):
             path = get_path_arg_from_module_line(line)
             return path[:path.find('/lib')]
 
     # If it lists its package directory, return that
     for line in text:
-        pattern = r'\W{0}_DIR'.format(module_name.upper())
+        pattern = r'\W{0}_DIR'.format(pkg_var_prefix)
         if re.search(pattern, line):
             return get_path_arg_from_module_line(line)