On 06/04/2015 10:11 PM, Paul Eggleton wrote:
Hi Qi,

On Wednesday 27 May 2015 14:09:39 Chen Qi wrote:
Copy the contents of local.conf under TOPDIR into the final generated
local.conf. In this way, custom settings are also made into the final
local.conf like IMAGE_INSTALL, DISTRO_FEATURES, VIRTUAL-RUNTIME_xxx, etc.

Before this change, installing extensible SDK would usually report failure
when preparing the build system if the user has custom configuration for
DISTRO_FEATURES in local.conf. Also, items in IMAGE_INSTALL_append in
local.conf also don't get built correctly.

This patch solves the above problem.

A blacklist mechanism is also introduced so that we can blacklist variables
that should not be copied into the final local.conf file. Currently, the
blacklist contains 'TMPDIR', 'SSTATE_DIR', 'DL_DIR', 'STAMPS_DIR',
'BASE_WORKDIR' and 'DEPLOY_DIR'. What these variables have in common is
that they are set in bitbake.conf using '?=' or '??='.

In addition, we check to avoid any setting that might lead to host path
bleeding into SDK's configuration.

[YOCTO #7616]

Signed-off-by: Chen Qi <qi.c...@windriver.com>
---
  meta/classes/populate_sdk_ext.bbclass | 23 +++++++++++++++++++++++
  1 file changed, 23 insertions(+)

diff --git a/meta/classes/populate_sdk_ext.bbclass
b/meta/classes/populate_sdk_ext.bbclass index 2fc4c11..49ba26b 100644
--- a/meta/classes/populate_sdk_ext.bbclass
+++ b/meta/classes/populate_sdk_ext.bbclass
@@ -16,6 +16,7 @@ SDK_RDEPENDS_append_task-populate-sdk-ext = "
${SDK_TARGETS}" SDK_RELOCATE_AFTER_INSTALL_task-populate-sdk-ext = "0"

  SDK_META_CONF_WHITELIST ?= "MACHINE DISTRO PACKAGE_CLASSES"
+SDK_META_CONF_BLACKLIST ?= "TMPDIR DL_DIR SSTATE_DIR STAMPS_DIR
BASE_WORKDIR DEPLOY_DIR"

  SDK_TARGETS ?= "${PN}"
  OE_INIT_ENV_SCRIPT ?= "oe-init-build-env"
@@ -114,6 +115,28 @@ python copy_buildsystem () {
          f.write('# this configuration provides, it is strongly suggested
that you set\n') f.write('# up a proper instance of the full build system
and use that instead.\n\n')

+        # Copy configurations from the current local.conf
+        builddir = d.getVar('TOPDIR', True)
+        with open(builddir + '/conf/local.conf', 'r') as lf:
+            varblacklist = d.getVar('SDK_META_CONF_BLACKLIST',
True).split() +            skip = False
+            for line in lf:
+                line = line.lstrip()
+                if line.startswith('#'):
+                    continue
+                # avoid host path bleeding into SDK configuration
+                if line.find('"/') != -1:
+                    continue
+                for varname in varblacklist:
+                    if line.startswith(varname):
+                        skip = True
+                        break
+                if not skip:
+                    f.write(line)
+                skip = False
+        f.write('\n')
+
+        # Configurations in local.conf which are specific for extensible
SDK f.write('INHERIT += "%s"\n\n' % 'uninative')
          f.write('CONF_VERSION = "%s"\n\n' % d.getVar('CONF_VERSION'))
I've been thinking about this; since I've recently added edit_metadata() in
bitbake's lib/bb/utils.py, it would make sense to use that rather than adding
another piece of code that effectively parses bitbake configuration files 
(though
I know this isn't adding much). I know this series has been going back and
forth for a while now and the delays have largely been my fault, so I'd be
happy to make this change and resend the series - it's up to you.

Cheers,
Paul


Hi Paul,

Thanks for your suggestion.
I've been looking into edit_metadata(). But it seems that it's used to modify *specific* variables. In this case, we don't know which variables we are going to skip in local.conf. We just know that they start with '/'. So I don't see how to do it. I'm not sure if I understand things wrong. Please point it out directly if I've missed something.

Best Regards,
Chen Qi
--
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