LICENSE should be a superset of all LICENSE_<pkg> values. That is,
LICENSE should contain all licenses and LICENSE_<pkg> can be used to
"filter" this on a per-package basis. LICENSE_<pkg> shouldn't contain
anything that isn't specified in LICENSE.

This patch implements simple checking of LICENSE_<pkg> values. It does
do not do advanced parsing/matching of license expressions, but,
checks that all licenses mentioned in LICENSE_<pkg> are also specified in
LICENSE. A warning is printed if problems are found.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

Iterators now return views, not lists in python3. Where we need
lists, handle this explicitly.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

When INCOMPATIBLE_LICENSE's is specified it need to be removed from
license.manifest and also avoid copy to target image.

Add ManifestVisitor that walk the license string searching for
INCOMPATIBLE_LICENSE's if found remove it.

[YOCTO #6765]

Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Create get_elements and visit_elements in LicenseVisitor based
on visit_string this allow to do modifications on elements before
parsing with AST.

Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Add dont_want_licenses as parameter to license_ok function and move it
to oe.license module in order to use in other modules.

Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Strictly speaking not all of these characters are operators, so reword
the message to describe them as separators. Also use the standard
"recipename: message" format.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

StandardError is removed in python3, replace with Exception class instead.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

actually if a package has a license in its LICENSE variable
which is not in the whitelist nor in the blacklist and even
if an other license in this variable is in the whitelist,
the package gets excluded and is not taken in account in the
copyleft_compliance.
This patch solves this by excluding a recipe _only_ if the
LICENSE variable includes a pattern from the blacklist and
including a recipe only if it includes a variable from the
whitelist _and_ none from the blacklist.

Example in busybox which has LICENSE="GPLv2 & BSD-4-Clause",
with the actual behaviour (where he blacklist contains only
CLOSED Proprietary) we get :
DEBUG: copyleft: busybox-1.19.4 is excluded: recipe has excluded licenses: BSD-4-Clause
which is not sane because busybox is covered by a copyleft license
which is GPLv2 and should match the default whitelist which is
GPL* LGPL*.

Signed-off-by: Eric Bénard <eric@eukrea.com>

Signed-off-by: Christopher Larson <chris_larson@mentor.com>

Given a license string and whitelist and blacklist, determine if the
license string matches the whitelist and does not match the blacklist.

When encountering an OR, it prefers the side with the highest weight (more
included licenses). It then checks the inclusion of the flattened list of
licenses from there.

Returns a tuple holding the boolean state and a list of the applicable
licenses which were excluded (or None, if the state is True)

Examples:

    is_included, excluded = oe.license.is_included(licensestr, ['GPL*', 'LGPL*'])
    is_included, excluded = oe.license.is_included(licensestr, blacklist=['Proprietary', 'CLOSED'])

Signed-off-by: Christopher Larson <chris_larson@mentor.com>