populate_sdk_ext: consider custom configuration in local.conf

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 by making use of the bb.utils.edit_metadata.

In addition, we check to avoid any setting that might lead to host path
bleeding into SDK's configuration. Basically, variables with values starting
with '/' are removed. A whitelist mechanism is introduced so that users could
specify variables that should not be ignored. The name of the whitelist is
SDK_LOCAL_CONF_WHITELIST.

The SDK_META_CONF_WHITELIST is removed as it's of no use after this change.

Add SDK_INHERIT_BLACKLIST to forbit local.conf in SDK to herit certain classes
like 'buildhistory' or 'icecc'.

[YOCTO #7616]

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>

1 files changed, 20 insertions, 3 deletions

diff --git a/meta/classes/populate_sdk_ext.bbclass b/meta/classes/populate_sdk_ext.bbclass
index a36bf16c78..da5ec2c33e 100644
--- a/meta/classes/populate_sdk_ext.bbclass
+++ b/meta/classes/populate_sdk_ext.bbclass
@@ -15,7 +15,8 @@ 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_LOCAL_CONF_WHITELIST ?= ""
+SDK_INHERIT_BLACKLIST ?= "buildhistory icecc"
 
 SDK_TARGETS ?= "${PN}"
 OE_INIT_ENV_SCRIPT ?= "oe-init-build-env"
@@ -109,15 +110,33 @@ python copy_buildsystem () {
         f.write('    "\n')
 
     # Create local.conf
+    local_conf_whitelist = d.getVar('SDK_LOCAL_CONF_WHITELIST', True).split()
+    def handle_var(varname, origvalue, op, newlines):
+        if origvalue.strip().startswith('/') and not varname in local_conf_whitelist:
+            newlines.append('# Removed original setting of %s\n' % varname)
+            return None, op, 0, True
+        else:
+            return origvalue, op, 0, True
+    varlist = ['[^#=+ ]*']
+    builddir = d.getVar('TOPDIR', True)
+    with open(builddir + '/conf/local.conf', 'r') as f:
+        oldlines = f.readlines()
+    (updated, newlines) = bb.utils.edit_metadata(oldlines, varlist, handle_var)
+
     with open(baseoutpath + '/conf/local.conf', 'w') as f:
         f.write('# WARNING: this configuration has been automatically generated and in\n')
         f.write('# most cases should not be edited. If you need more flexibility than\n')
         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')
+        for line in newlines:
+            f.write(line)
 
         f.write('INHERIT += "%s"\n\n' % 'uninative')
         f.write('CONF_VERSION = "%s"\n\n' % d.getVar('CONF_VERSION', False))
 
+        # Some classes are not suitable for SDK, remove them from INHERIT
+        f.write('INHERIT_remove = "%s"\n' % d.getVar('SDK_INHERIT_BLACKLIST'))
+    
         # This is a bit of a hack, but we really don't want these dependencies
         # (we're including them in the SDK as nativesdk- versions instead)
         f.write('POKYQEMUDEPS_forcevariable = ""\n\n')
@@ -134,8 +153,6 @@ python copy_buildsystem () {
         # Ensure locked sstate cache objects are re-used without error
         f.write('SIGGEN_LOCKEDSIGS_CHECK_LEVEL = "warn"\n\n')
 
-        for varname in d.getVar('SDK_META_CONF_WHITELIST', True).split():
-            f.write('%s = "%s"\n' % (varname, d.getVar(varname, True)))
         f.write('require conf/locked-sigs.inc\n')
         f.write('require conf/work-config.inc\n')