From 19e92dfe063968154d8744936ece19e6aca3466a Mon Sep 17 00:00:00 2001 From: Scott Garman Date: Mon, 12 Mar 2012 17:07:19 -0700 Subject: path.py: add make_relative_symlink method This method allows you to convert an absolute symlink into a relative one. (From OE-Core rev: 71062c1e0fb45a4b4e58ea5d217706aa2b402d88) Signed-off-by: Scott Garman Signed-off-by: Richard Purdie --- meta/lib/oe/path.py | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'meta/lib') diff --git a/meta/lib/oe/path.py b/meta/lib/oe/path.py index 683b09701c..1fdfa8724f 100644 --- a/meta/lib/oe/path.py +++ b/meta/lib/oe/path.py @@ -40,6 +40,33 @@ def relative(src, dest): return os.path.sep.join(relpath) +def make_relative_symlink(path): + """ Convert an absolute symlink to a relative one """ + if not os.path.islink(path): + return + link = os.readlink(path) + if not os.path.isabs(link): + return + + # find the common ancestor directory + ancestor = path + depth = 0 + while ancestor and not link.startswith(ancestor): + ancestor = ancestor.rpartition('/')[0] + depth += 1 + + if not ancestor: + print "make_relative_symlink() Error: unable to find the common ancestor of %s and its target" % path + return + + base = link.partition(ancestor)[2].strip('/') + while depth > 1: + base = "../" + base + depth -= 1 + + os.remove(path) + os.symlink(base, path) + def format_display(path, metadata): """ Prepare a path for display to the user. """ rel = relative(metadata.getVar("TOPDIR", True), path) -- cgit v1.2.3-54-g00ecf