[gnome-continuous-yocto/gnomeostree-3.28-rocko: 1719/8267] base.bbclass wipe ${S} before unpacking source

[Emmanuele Bassi <ebassi src gnome org>]

commit a56fb90dc3805494eeaf04c60538425e8d52efc5
Author: Markus Lehtonen <markus lehtonen linux intel com>
Date:   Tue Mar 22 18:47:00 2016 +0200

    base.bbclass wipe ${S} before unpacking source
    
    Make sure that we have a pristine source tree after do_unpack.
    
    [YOCTO #9064]
    
    (From OE-Core rev: eccae514b71394ffaed8fc45dea7942152a334a1)
    
    Signed-off-by: Markus Lehtonen <markus lehtonen linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/base.bbclass |   18 ++++++++----------
 1 files changed, 8 insertions(+), 10 deletions(-)
---
diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index 5d8e8d6..f2e3d40 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -136,23 +136,21 @@ python base_do_fetch() {
 
 addtask unpack after do_fetch
 do_unpack[dirs] = "${WORKDIR}"
+
+python () {
+    if d.getVar('S', True) != d.getVar('WORKDIR', True):
+        d.setVarFlag('do_unpack', 'cleandirs', '${S}')
+    else:
+        d.setVarFlag('do_unpack', 'cleandirs', os.path.join('${S}', 'patches'))
+}
 python base_do_unpack() {
     src_uri = (d.getVar('SRC_URI', True) or "").split()
     if len(src_uri) == 0:
         return
 
-    rootdir = d.getVar('WORKDIR', True)
-
-    # Ensure that we cleanup ${S}/patches
-    # TODO: Investigate if we can remove
-    # the entire ${S} in this case.
-    s_dir = d.getVar('S', True)
-    p_dir = os.path.join(s_dir, 'patches')
-    bb.utils.remove(p_dir, True)
-
     try:
         fetcher = bb.fetch2.Fetch(src_uri, d)
-        fetcher.unpack(rootdir)
+        fetcher.unpack(d.getVar('WORKDIR', True))
     except bb.fetch2.BBFetchException as e:
         raise bb.build.FuncFailed(e)
 }