lib/oe: Import oe lib from OE.dev

This library moves the common Python methods into modules of an 'oe' Python
package.

Signed-off-by: Joshua Lock <josh@linux.intel.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/meta/lib/oe/path.py b/meta/lib/oe/path.py
new file mode 100644
index 0000000000..8902951581
--- /dev/null
+++ b/meta/lib/oe/path.py
@@ -0,0 +1,44 @@
+def join(*paths):
+    """Like os.path.join but doesn't treat absolute RHS specially"""
+    import os.path
+    return os.path.normpath("/".join(paths))
+
+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
+    """
+    import os.path
+
+    if hasattr(os.path, "relpath"):
+        return os.path.relpath(dest, src)
+    else:
+        destlist = os.path.normpath(dest).split(os.path.sep)
+        srclist = os.path.normpath(src).split(os.path.sep)
+
+        # Find common section of the path
+        common = os.path.commonprefix([destlist, srclist])
+        commonlen = len(common)
+
+        # Climb back to the point where they differentiate
+        relpath = [ os.path.pardir ] * (len(srclist) - commonlen)
+        if commonlen < len(destlist):
+            # Add remaining portion
+            relpath += destlist[commonlen:]
+
+        return os.path.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