1 files changed, 46 insertions, 0 deletions
diff --git a/lib/oe/path.py b/lib/oe/path.py
new file mode 100644
index 0000000000..dbaa08d856
--- /dev/null
+++ b/lib/oe/path.py
@@ -0,0 +1,46 @@
+def join(a, *p):
+    """Like os.path.join but doesn't treat absolute RHS specially"""
+    path = a
+    for b in p:
+        if path == '' or path.endswith('/'):
+            path +=  b
+        else:
+            path += '/' + b
+    return path
+
+def relative(src, dest):
+    """ Return a relative path from src to dest.
+
+    >>> relative("/usr/bin", "/tmp/foo/bar")
+    ../../tmp/foo/bar
+
+    >>> relative("/usr/bin", "/usr/lib")
+    ../lib
+
+    >>> relative("/tmp", "/tmp/foo/bar")
+    foo/bar
+    """
+    from os.path import sep, pardir, normpath, commonprefix
+
+    destlist = normpath(dest).split(sep)
+    srclist = normpath(src).split(sep)
+
+    # Find common section of the path
+    common = commonprefix([destlist, srclist])
+    commonlen = len(common)
+
+    # Climb back to the point where they differentiate
+    relpath = [ pardir ] * (len(srclist) - commonlen)
+    if commonlen < len(destlist):
+        # Add remaining portion
+        relpath += destlist[commonlen:]
+
+    return sep.join(relpath)
+
+def format_display(path, metadata):
+    """ Prepare a path for display to the user. """
+    rel = relative(metadata.getVar("TOPDIR", 1), path)
+    if len(rel) > len(path):
+        return path
+    else:
+        return rel