[OE-core] [PATCH 2/3] package.bbclass: use oe.path.realpath()

[Enrico Scholz]

oe.path.realpath() provides are common and more correct implementation
for resolving symlinks within sysroot. Use it.

Old implementation suffered from lot of problems; e.g.

* redundant code

* calls 'os.stat()' which references files on host; this can give wrong
  results about existing/non-existing and can cause EPERM (instead of
  the catched ENONENT) exceptions

* does not deal with special cases like '..' leaving the sysroot.

Signed-off-by: Enrico Scholz <enrico.scholz at sigma-chemnitz.de>
---
 meta/classes/package.bbclass | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index b10e6f6..a74ec8a 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -741,7 +741,8 @@ python split_and_strip_files () {
                     continue
 
                 try:
-                    s = os.stat(file)
+                    ltarget = oe.path.realpath(file, dvar, False)
+                    s = os.lstat(ltarget)
                 except OSError, (err, strerror):
                     if err != errno.ENOENT:
                         raise
@@ -752,11 +753,6 @@ python split_and_strip_files () {
                     # If it's a symlink, and points to an ELF file, we capture the readlink target
                     if os.path.islink(file):
                         target = os.readlink(file)
-                        if not os.path.isabs(target):
-                            ltarget = os.path.join(os.path.dirname(file), target)
-                        else:
-                            ltarget = target
-
                         if isELF(ltarget):
                             #bb.note("Sym: %s (%d)" % (ltarget, isELF(ltarget)))
                             symlinks[file] = target
@@ -1005,14 +1001,12 @@ python package_fixsymlinks () {
                 rpath = path[len(inst_root):]
                 pkg_files[pkg].append(rpath)
                 try:
-                    s = os.stat(path)
+                    rtarget = oe.path.realpath(path, inst_root, True)
+                    os.lstat(rtarget)
                 except OSError, (err, strerror):
                     if err != errno.ENOENT:
                         raise
-                    target = os.readlink(path)
-                    if target[0] != '/':
-                        target = os.path.join(os.path.dirname(path)[len(inst_root):], target)
-                    dangling_links[pkg].append(os.path.normpath(target))
+                    dangling_links[pkg].append(os.path.normpath(rtarget[len(inst_root):]))
 
     newrdepends = {}
     for pkg in dangling_links:
-- 
1.7.11.7