[PATCH v3 02/17] tests/docker: better handle symlinked libs

["Alex Bennée" <alex.bennee@linaro.org>]

When we are copying we want to ensure we grab the first
resolution (the found in path section). However even that binary might
be a symlink so lets make sure we chase the symlinks to copy the right
binary to where it can be found.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>

---
v3
  - fix comment
  - fix grouping extraction
  - try/except on IndexError
---
 tests/docker/docker.py | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/tests/docker/docker.py b/tests/docker/docker.py
index 31d8adf836e..d8268c11117 100755
--- a/tests/docker/docker.py
+++ b/tests/docker/docker.py
@@ -106,18 +106,19 @@ def _get_so_libs(executable):
     """Return a list of libraries associated with an executable.
 
     The paths may be symbolic links which would need to be resolved to
-    ensure theright data is copied."""
+    ensure the right data is copied."""
 
     libs = []
-    ldd_re = re.compile(r"(/.*/)(\S*)")
+    ldd_re = re.compile(r"(?:\S+ => )?(\S*) \(:?0x[0-9a-f]+\)")
     try:
         ldd_output = subprocess.check_output(["ldd", executable]).decode('utf-8')
         for line in ldd_output.split("\n"):
             search = ldd_re.search(line)
-            if search and len(search.groups()) == 2:
-                so_path = search.groups()[0]
-                so_lib = search.groups()[1]
-                libs.append("%s/%s" % (so_path, so_lib))
+            if search:
+                try:
+                    libs.append(s.group(1))
+                except IndexError:
+                    pass
     except subprocess.CalledProcessError:
         print("%s had no associated libraries (static build?)" % (executable))
 
@@ -145,7 +146,8 @@ def _copy_binary_with_libs(src, bin_dest, dest_dir):
     if libs:
         for l in libs:
             so_path = os.path.dirname(l)
-            _copy_with_mkdir(l, dest_dir, so_path)
+            real_l = os.path.realpath(l)
+            _copy_with_mkdir(real_l, dest_dir, so_path)
 
 
 def _check_binfmt_misc(executable):
-- 
2.20.1