[OE-core] [PATCH] rootfs: improve postinst intercept logging

[Ross Burton]

Ensure we capture stderr, always write the output to the log, and don't be so
emotional in the warning message.

Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 meta/lib/oe/rootfs.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/meta/lib/oe/rootfs.py b/meta/lib/oe/rootfs.py
index 96591f370e6..9d4727e76c1 100644
--- a/meta/lib/oe/rootfs.py
+++ b/meta/lib/oe/rootfs.py
@@ -302,10 +302,11 @@ class Rootfs(object, metaclass=ABCMeta):
             bb.note("> Executing %s intercept ..." % script)
 
             try:
-                subprocess.check_output(script_full)
+                output = subprocess.check_output(script_full, stderr=subprocess.STDOUT)
+                if output: bb.note(output.decode("utf-8"))
             except subprocess.CalledProcessError as e:
-                bb.warn("The postinstall intercept hook '%s' failed (exit code: %d)! See log for details! (Output: %s)" %
-                        (script, e.returncode, e.output))
+                bb.warn("The postinstall intercept hook '%s' failed, details in log.do_rootfs" % script)
+                bb.note("Exit code %d. Output:\n%s" % (e.returncode, e.output.decode("utf-8")))
 
                 with open(script_full) as intercept:
                     registered_pkgs = None
-- 
2.11.0