base/license: Rework INCOMPATIBLE_LICENSE variable handling

This re-writes the INCOMPATIBLE_LICENSE checking code to replace
the WHITELIST_<lic> with
INCOMPATIBLE_LICENSE_EXCEPTIONS = '<pkg>:<lic> <pkg>:<lic> ...'

This initial change leaves most of the code structure in place,
but the code in base.bbclass needs to be re-written to make
the check more consistent around packages (PKGS) and not recipe
names (PN). This also is taking into account the changes for SPDX
licenses.

The aim is to provide a mode consistent variable where the variable
name is known and can easily be queried.

Signed-off-by: Saul Wold <saul.wold@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 45 insertions, 61 deletions

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index 55f654d37d..1d5db96afb 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -595,46 +595,35 @@ python () {
         if check_license and bad_licenses:
             bad_licenses = expand_wildcard_licenses(d, bad_licenses)
 
-            whitelist = []
-            for lic in bad_licenses:
-                spdx_license = return_spdx(d, lic)
-                whitelist.extend((d.getVar("WHITELIST_" + lic) or "").split())
-                if spdx_license:
-                    whitelist.extend((d.getVar("WHITELIST_" + spdx_license) or "").split())
-
-            if pn in whitelist:
-                '''
-                We need to track what we are whitelisting and why. If pn is
-                incompatible we need to be able to note that the image that
-                is created may infact contain incompatible licenses despite
-                INCOMPATIBLE_LICENSE being set.
-                '''
-                bb.note("Including %s as buildable despite it having an incompatible license because it has been whitelisted" % pn)
-            else:
-                pkgs = d.getVar('PACKAGES').split()
-                skipped_pkgs = {}
-                unskipped_pkgs = []
-                for pkg in pkgs:
-                    incompatible_lic = incompatible_license(d, bad_licenses, pkg)
-                    if incompatible_lic:
-                        skipped_pkgs[pkg] = incompatible_lic
-                    else:
-                        unskipped_pkgs.append(pkg)
-                if unskipped_pkgs:
-                    for pkg in skipped_pkgs:
-                        bb.debug(1, "Skipping the package %s at do_rootfs because of incompatible license(s): %s" % (pkg, ' '.join(skipped_pkgs[pkg])))
-                        d.setVar('_exclude_incompatible-' + pkg, ' '.join(skipped_pkgs[pkg]))
-                    for pkg in unskipped_pkgs:
-                        bb.debug(1, "Including the package %s" % pkg)
+            exceptions = (d.getVar("INCOMPATIBLE_LICENSE_EXCEPTIONS") or "").split()
+
+            pkgs = d.getVar('PACKAGES').split()
+            skipped_pkgs = {}
+            unskipped_pkgs = []
+            for pkg in pkgs:
+                remaining_bad_licenses = oe.license.apply_pkg_license_exception(pkg, bad_licenses, exceptions)
+
+                incompatible_lic = incompatible_license(d, remaining_bad_licenses, pkg)
+                if incompatible_lic:
+                    skipped_pkgs[pkg] = incompatible_lic
                 else:
-                    incompatible_lic = incompatible_license(d, bad_licenses)
-                    for pkg in skipped_pkgs:
-                        incompatible_lic += skipped_pkgs[pkg]
-                    incompatible_lic = sorted(list(set(incompatible_lic)))
-
-                    if incompatible_lic:
-                        bb.debug(1, "Skipping recipe %s because of incompatible license(s): %s" % (pn, ' '.join(incompatible_lic)))
-                        raise bb.parse.SkipRecipe("it has incompatible license(s): %s" % ' '.join(incompatible_lic))
+                    unskipped_pkgs.append(pkg)
+
+            if unskipped_pkgs:
+                for pkg in skipped_pkgs:
+                    bb.debug(1, "Skipping the package %s at do_rootfs because of incompatible license(s): %s" % (pkg, ' '.join(skipped_pkgs[pkg])))
+                    d.setVar('_exclude_incompatible-' + pkg, ' '.join(skipped_pkgs[pkg]))
+                for pkg in unskipped_pkgs:
+                    bb.debug(1, "Including the package %s" % pkg)
+            else:
+                incompatible_lic = incompatible_license(d, bad_licenses)
+                for pkg in skipped_pkgs:
+                    incompatible_lic += skipped_pkgs[pkg]
+                incompatible_lic = sorted(list(set(incompatible_lic)))
+
+                if incompatible_lic:
+                    bb.debug(1, "Skipping recipe %s because of incompatible license(s): %s" % (pn, ' '.join(incompatible_lic)))
+                    raise bb.parse.SkipRecipe("it has incompatible license(s): %s" % ' '.join(incompatible_lic))
 
     needsrcrev = False
     srcuri = d.getVar('SRC_URI')
diff --git a/meta/classes/license_image.bbclass b/meta/classes/license_image.bbclass
index bf70bee99b..0a5ea0a2fb 100644
--- a/meta/classes/license_image.bbclass
+++ b/meta/classes/license_image.bbclass
@@ -54,28 +54,23 @@ def write_license_files(d, license_manifest, pkg_dic, rootfs=True):
     bad_licenses = (d.getVar("INCOMPATIBLE_LICENSE") or "").split()
     bad_licenses = expand_wildcard_licenses(d, bad_licenses)
 
-    whitelist = []
-    for lic in bad_licenses:
-        whitelist.extend((d.getVar("WHITELIST_" + lic) or "").split())
-
+    exceptions = (d.getVar("INCOMPATIBLE_LICENSE_EXCEPTIONS") or "").split()
     with open(license_manifest, "w") as license_file:
         for pkg in sorted(pkg_dic):
-            if bad_licenses and pkg not in whitelist:
-                try:
-                    licenses = incompatible_pkg_license(d, bad_licenses, pkg_dic[pkg]["LICENSE"])
-                    if licenses:
-                        bb.fatal("Package %s cannot be installed into the image because it has incompatible license(s): %s" %(pkg, ' '.join(licenses)))
-                    (pkg_dic[pkg]["LICENSE"], pkg_dic[pkg]["LICENSES"]) = \
-                        oe.license.manifest_licenses(pkg_dic[pkg]["LICENSE"],
-                        bad_licenses, canonical_license, d)
-                except oe.license.LicenseError as exc:
-                    bb.fatal('%s: %s' % (d.getVar('P'), exc))
+            remaining_bad_licenses = oe.license.apply_pkg_license_exception(pkg, bad_licenses, exceptions)
+            incompatible_licenses = incompatible_pkg_license(d, remaining_bad_licenses, pkg_dic[pkg]["LICENSE"])
+            if incompatible_licenses:
+                bb.fatal("Package %s cannot be installed into the image because it has incompatible license(s): %s" %(pkg, ' '.join(incompatible_licenses)))
             else:
-                pkg_dic[pkg]["LICENSES"] = re.sub(r'[|&()*]', ' ', pkg_dic[pkg]["LICENSE"])
-                pkg_dic[pkg]["LICENSES"] = re.sub(r'  *', ' ', pkg_dic[pkg]["LICENSES"])
-                pkg_dic[pkg]["LICENSES"] = pkg_dic[pkg]["LICENSES"].split()
-                if pkg in whitelist:
-                    oe.qa.handle_error('license-incompatible', "Including %s with an incompatible license %s into the image, because it has been whitelisted." %(pkg, pkg_dic[pkg]["LICENSE"]), d)
+                incompatible_licenses = incompatible_pkg_license(d, bad_licenses, pkg_dic[pkg]["LICENSE"])
+                if incompatible_licenses:
+                    oe.qa.handle_error('license-incompatible', "Including %s with incompatible license(s) %s into the image, because it has been allowed by exception list." %(pkg, ' '.join(incompatible_licenses)), d)
+            try:
+                (pkg_dic[pkg]["LICENSE"], pkg_dic[pkg]["LICENSES"]) = \
+                    oe.license.manifest_licenses(pkg_dic[pkg]["LICENSE"],
+                    remaining_bad_licenses, canonical_license, d)
+            except oe.license.LicenseError as exc:
+                bb.fatal('%s: %s' % (d.getVar('P'), exc))
 
             if not "IMAGE_MANIFEST" in pkg_dic[pkg]:
                 # Rootfs manifest
diff --git a/meta/classes/multilib.bbclass b/meta/classes/multilib.bbclass
index 1ad654f546..5859ca8d21 100644
--- a/meta/classes/multilib.bbclass
+++ b/meta/classes/multilib.bbclass
@@ -75,12 +75,12 @@ python multilib_virtclass_handler () {
     e.data.setVar("PN", variant + "-" + e.data.getVar("PN", False))
     e.data.setVar("OVERRIDES", e.data.getVar("OVERRIDES", False) + override)
 
-    # Expand WHITELIST_GPL-3.0 with multilib prefix
-    pkgs = e.data.getVar("WHITELIST_GPL-3.0")
+    # Expand INCOMPATIBLE_LICENSE_EXCEPTIONS with multilib prefix
+    pkgs = e.data.getVar("INCOMPATIBLE_LICENSE_EXCEPTIONS")
     if pkgs:
         for pkg in pkgs.split():
             pkgs += " " + variant + "-" + pkg
-        e.data.setVar("WHITELIST_GPL-3.0", pkgs)
+        e.data.setVar("INCOMPATIBLE_LICENSE_EXCEPTIONS", pkgs)
 
     # DEFAULTTUNE can change TARGET_ARCH override so expand this now before update_data
     newtune = e.data.getVar("DEFAULTTUNE:" + "virtclass-multilib-" + variant, False)