[OE-core] [PATCH 2/3] sstatesig: add new item checking for locked signature dump

[Hongxu Jia]

While dumping locked signature, if there is nothing added
in the current build (such as build the same recipe again),
there are accumulating empty SIGGEN_LOCKEDSIGS added, such as:
...
SIGGEN_LOCKEDSIGS_t-x86-64 += "\
    "
SIGGEN_LOCKEDSIGS_TYPES_qemux86 += "t-x86-64"

SIGGEN_LOCKEDSIGS_t-x86-64 += "\
    "
SIGGEN_LOCKEDSIGS_TYPES_qemux86 += "t-x86-64"
...
Add new item checking to fix the issue.

Invoke set() to drop duplicated types

Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
---
 meta/lib/oe/sstatesig.py | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/meta/lib/oe/sstatesig.py b/meta/lib/oe/sstatesig.py
index 56fd953..b2ffc7e 100644
--- a/meta/lib/oe/sstatesig.py
+++ b/meta/lib/oe/sstatesig.py
@@ -64,7 +64,7 @@ def sstate_rundepfilter(siggen, fn, recipename, task, dep, depname, dataCache):
 def sstate_lockedsigs(d):
     sigs = {}
     types = (d.getVar("SIGGEN_LOCKEDSIGS_TYPES", True) or "").split()
-    for t in types:
+    for t in set(types):
         lockedsigs = (d.getVar("SIGGEN_LOCKEDSIGS_%s" % t, True) or "").split()
         for ls in lockedsigs:
             pn, task, h = ls.split(":", 2)
@@ -143,6 +143,7 @@ class SignatureGeneratorOEBasicHash(bb.siggen.SignatureGeneratorBasicHash):
 
         bb.plain("Writing locked sigs to %s" % sigfile)
         types = {}
+        has_new_lockedsigs = False
         for k in self.runtaskdeps:
             fn = k.rsplit(".",1)[0]
             t = self.lockedhashfn[fn].split(" ")[1].split(":")[5]
@@ -151,6 +152,20 @@ class SignatureGeneratorOEBasicHash(bb.siggen.SignatureGeneratorBasicHash):
                 types[t] = []
             types[t].append(k)
 
+            if not has_new_lockedsigs:
+                pn = self.lockedpnmap[fn]
+                if pn not in self.lockedsigs:
+                    has_new_lockedsigs = True
+                    continue
+                task = k.rsplit(".",1)[1]
+                if task not in self.lockedsigs[pn]:
+                    has_new_lockedsigs = True
+                    continue
+
+        if not has_new_lockedsigs:
+            bb.plain("Nothing added to %s" % sigfile)
+            return
+
         with open(sigfile, "a") as f:
             for t in types:
                 f.write('SIGGEN_LOCKEDSIGS_%s += "\\\n' % t)
-- 
1.9.1