[OE-core] [PATCH 2/2] multiconfig: Enable multiconfig dependencies on oe-core

[Alejandro Enedino Hernandez Samaniego]

This patch enables multiconfig dependencies (mcdepends) to be used on
recipes using the following format:

task[mcdepends] = "multiconfig:FROM-MC:TO-MC:PN:task-to-depend-on"

For the sake of simplicity consider the following example:

Assuming we have set up multiconfig builds, one for qemux86 and one for
qemuarm, named x86 and arm respectively.

Adding the following line to an image recipe (core-image-sato):
do_image[mcdepends] = "multiconfig:x86:arm:core-image-minimal:do_rootfs"

Would state that core-image-sato:do_image from x86 will depend on
core-image-minimal:do_rootfs from arm so it can be executed.

This patch makes modifications to bitbake.conf to enable mcdepends, and
to sstatesig and staging.bbclass to avoid conflicts between packages from
different multiconfigs.

[YOCTO #10681]

Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandr at xilinx.com>
---
 meta/classes/staging.bbclass | 8 +++++++-
 meta/conf/bitbake.conf       | 2 +-
 meta/lib/oe/sstatesig.py     | 9 ++++++++-
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/meta/classes/staging.bbclass b/meta/classes/staging.bbclass
index 41df883..27b012e 100644
--- a/meta/classes/staging.bbclass
+++ b/meta/classes/staging.bbclass
@@ -256,7 +256,7 @@ python extend_recipe_sysroot() {
     workdir = d.getVar("WORKDIR")
     #bb.warn(str(taskdepdata))
     pn = d.getVar("PN")
-
+    mc = d.getVar("BB_CURRENT_MC")
     stagingdir = d.getVar("STAGING_DIR")
     sharedmanifests = d.getVar("COMPONENTS_DIR") + "/manifests"
     recipesysroot = d.getVar("RECIPE_SYSROOT")
@@ -443,7 +443,13 @@ python extend_recipe_sysroot() {
 
     msg_exists = []
     msg_adding = []
+
     for dep in configuredeps:
+        if mc != 'default':
+            # We should not care about other multiconfigs
+            depmc = dep.split(':')[1]
+            if depmc != mc:
+                continue
         c = setscenedeps[dep][0]
         if c not in installed:
             continue
diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index e28f3c7..f68954c 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -877,7 +877,7 @@ BB_SIGNATURE_EXCLUDE_FLAGS ?= "doc deps depends \
     file-checksums python func task export unexport noexec nostamp dirs cleandirs \
     sstate-lockfile-shared prefuncs postfuncs export_func deptask rdeptask \
     recrdeptask nodeprrecs stamp-extra-info sstate-outputdirs filename lineno \
-    progress"
+    progress mcdepends"
 
 MLPREFIX ??= ""
 MULTILIB_VARIANTS ??= ""
diff --git a/meta/lib/oe/sstatesig.py b/meta/lib/oe/sstatesig.py
index 5dcc2f5..18c5a35 100644
--- a/meta/lib/oe/sstatesig.py
+++ b/meta/lib/oe/sstatesig.py
@@ -150,16 +150,23 @@ class SignatureGeneratorOEBasicHash(bb.siggen.SignatureGeneratorBasicHash):
         if recipename in self.unlockedrecipes:
             unlocked = True
         else:
+            def get_mc(tid):
+                tid = tid.rsplit('.', 1)[0]
+                if tid.startswith('multiconfig:'):
+                    elems = tid.split(':')
+                    return elems[1]
             def recipename_from_dep(dep):
                 # The dep entry will look something like
                 # /path/path/recipename.bb.task, virtual:native:/p/foo.bb.task,
                 # ...
+
                 fn = dep.rsplit('.', 1)[0]
                 return dataCache.pkg_fn[fn]
 
+            mc = get_mc(fn)
             # If any unlocked recipe is in the direct dependencies then the
             # current recipe should be unlocked as well.
-            depnames = [ recipename_from_dep(x) for x in deps ]
+            depnames = [ recipename_from_dep(x) for x in deps if mc == get_mc(x)]
             if any(x in y for y in depnames for x in self.unlockedrecipes):
                 self.unlockedrecipes[recipename] = ''
                 unlocked = True
-- 
2.7.4