1 files changed, 43 insertions, 0 deletions
diff --git a/lib/spack/external/macholib/dylib.py b/lib/spack/external/macholib/dylib.py
new file mode 100644
index 0000000000..5b06b40e13
--- /dev/null
+++ b/lib/spack/external/macholib/dylib.py
@@ -0,0 +1,43 @@
+"""
+Generic dylib path manipulation
+"""
+
+import re
+
+__all__ = ['dylib_info']
+
+_DYLIB_RE = re.compile(r"""(?x)
+(?P<location>^.*)(?:^|/)
+(?P<name>
+    (?P<shortname>\w+?)
+    (?:\.(?P<version>[^._]+))?
+    (?:_(?P<suffix>[^._]+))?
+    \.dylib$
+)
+""")
+
+
+def dylib_info(filename):
+    """
+    A dylib name can take one of the following four forms:
+        Location/Name.SomeVersion_Suffix.dylib
+        Location/Name.SomeVersion.dylib
+        Location/Name_Suffix.dylib
+        Location/Name.dylib
+
+    returns None if not found or a mapping equivalent to:
+        dict(
+            location='Location',
+            name='Name.SomeVersion_Suffix.dylib',
+            shortname='Name',
+            version='SomeVersion',
+            suffix='Suffix',
+        )
+
+    Note that SomeVersion and Suffix are optional and may be None
+    if not present.
+    """
+    is_dylib = _DYLIB_RE.match(filename)
+    if not is_dylib:
+        return None
+    return is_dylib.groupdict()