[bitbake-devel] [PATCH 5/7] bitbake: data: Ensure task checksums account for remove data

[Richard Purdie]

Currently remove operations are not being accounted for in the task
checksums. This is a fairly serious oversight and needs to be fixed.

To do so, we need internal data from getVarFlag combined with the
expanded variable data so that only "active" remove operators are
accounted for in the task checksum. We can get this from the new
optional removes attribute in the returned parser object.

The code can then use the data on active remove operators to account
for the removals in task checksum but only when the removal is active.

We have to be careful here not to reference any expanded data since this
may for example contain build paths. This means we can only map back
and reference the unsplit (and hence unexpanded) remove string which may
expand to multiple removal values.

[YOCTO #12913]

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 lib/bb/data.py       | 12 ++++++++++++
 lib/bb/data_smart.py | 27 ++++++++++++++++++---------
 2 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/lib/bb/data.py b/lib/bb/data.py
index e2700077c3..fde4cba6bb 100644
--- a/lib/bb/data.py
+++ b/lib/bb/data.py
@@ -307,6 +307,14 @@ def build_dependencies(key, keys, shelldeps, varflagsexcl, d):
                 return newvalue
             return value + newvalue
 
+        def handle_remove(value, deps, removes, d):
+            for r in sorted(removes):
+                r2 = d.expandWithRefs(r, None)
+                value += "\n_remove of %s" % r
+                deps |= r2.references
+                deps = deps | (keys & r2.execs)
+            return value
+
         if "vardepvalue" in varflags:
             value = varflags.get("vardepvalue")
         elif varflags.get("func"):
@@ -327,6 +335,8 @@ def build_dependencies(key, keys, shelldeps, varflagsexcl, d):
                 deps = deps | parsedvar.references
                 deps = deps | (keys & parser.execs) | (keys & parsedvar.execs)
                 value = handle_contains(value, parsedvar.contains, d)
+                if hasattr(parsedvar, "removes"):
+                    value = handle_remove(value, deps, parsedvar.removes, d)
             if vardeps is None:
                 parser.log.flush()
             if "prefuncs" in varflags:
@@ -340,6 +350,8 @@ def build_dependencies(key, keys, shelldeps, varflagsexcl, d):
             deps |= parser.references
             deps = deps | (keys & parser.execs)
             value = handle_contains(value, parser.contains, d)
+            if hasattr(parser, "removes"):
+                value = handle_remove(value, deps, parser.removes, d)
 
         if "vardepvalueexclude" in varflags:
             exclude = varflags.get("vardepvalueexclude")
diff --git a/lib/bb/data_smart.py b/lib/bb/data_smart.py
index 4ad0567c9a..8c4c6a9a32 100644
--- a/lib/bb/data_smart.py
+++ b/lib/bb/data_smart.py
@@ -805,7 +805,7 @@ class DataSmart(MutableMapping):
             value = parser.value
 
         if value and flag == "_content" and local_var is not None and "_remove" in local_var and not parsing:
-            removes = []
+            removes = {}
             self.need_overrides()
             for (r, o) in local_var["_remove"]:
                 match = True
@@ -814,14 +814,23 @@ class DataSmart(MutableMapping):
                         if not o2 in self.overrides:
                             match = False                            
                 if match:
-                    removes.extend(self.expand(r).split())
-
-            if removes:
-                filtered = filter(lambda v: v not in removes,
-                                  __whitespace_split__.split(value))
-                value = "".join(filtered)
-                if parser:
-                    parser.value = value
+                    removes[r] = self.expand(r).split()
+
+            if removes and parser:
+                parser.removes = set()
+                val = ""
+                for v in __whitespace_split__.split(parser.value):
+                    skip = False
+                    for r in removes:
+                        if v in removes[r]:
+                            parser.removes.add(r)
+                            skip = True
+                    if skip:
+                        continue
+                    val = val + v
+                parser.value = val
+                if expand:
+                    value = parser.value
 
         if parser:
             self.expand_cache[cachename] = parser
-- 
2.17.1