[gnome-continuous-yocto/gnomeostree-3.28-rocko: 5590/8267] classes/buildhistory: write out task signatures on every build

[Emmanuele Bassi <ebassi src gnome org>]

commit 6774995322cd6b092ca7f0e476077ca7aee0408e
Author: Paul Eggleton <paul eggleton linux intel com>
Date:   Fri Apr 7 16:57:19 2017 +1200

    classes/buildhistory: write out task signatures on every build
    
    If we want to determine what changed since the last build, one angle
    from which to look at it is to check the signatures. However, if we
    don't actually have the signatures from the last build we don't have
    anywhere to start. Save the signatures on each build in order to give us
    the starting point.
    
    NOTE: you need to set your BUILDHISTORY_FEATURES value to include
    "task" to enable collection of these signatures as it is is disabled by
    default.
    
    (From OE-Core rev: 11f68f65c46c5bc26ddeeade3021e83b3a7f895a)
    
    Signed-off-by: Paul Eggleton <paul eggleton linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/buildhistory.bbclass |   12 ++++++++++++
 meta/lib/oe/sstatesig.py          |   10 ++++++++++
 2 files changed, 22 insertions(+), 0 deletions(-)
---
diff --git a/meta/classes/buildhistory.bbclass b/meta/classes/buildhistory.bbclass
index eea1e72..4fc19a0 100644
--- a/meta/classes/buildhistory.bbclass
+++ b/meta/classes/buildhistory.bbclass
@@ -600,6 +600,17 @@ POPULATE_SDK_POST_HOST_COMMAND[vardepvalueexclude] .= "| buildhistory_list_insta
 SDK_POSTPROCESS_COMMAND_append = " buildhistory_get_sdkinfo ; buildhistory_get_extra_sdkinfo; "
 SDK_POSTPROCESS_COMMAND[vardepvalueexclude] .= "| buildhistory_get_sdkinfo ; buildhistory_get_extra_sdkinfo; 
"
 
+python buildhistory_write_sigs() {
+    if not "task" in (d.getVar('BUILDHISTORY_FEATURES') or "").split():
+        return
+
+    # Create sigs file
+    if hasattr(bb.parse.siggen, 'dump_siglist'):
+        taskoutdir = os.path.join(d.getVar('BUILDHISTORY_DIR'), 'task')
+        bb.utils.mkdirhier(taskoutdir)
+        bb.parse.siggen.dump_siglist(os.path.join(taskoutdir, 'tasksigs.txt'))
+}
+
 def buildhistory_get_build_id(d):
     if d.getVar('BB_WORKERCONTEXT') != '1':
         return ""
@@ -765,6 +776,7 @@ python buildhistory_eventhandler() {
                 shutil.rmtree(olddir)
             if e.data.getVar("BUILDHISTORY_COMMIT") == "1":
                 bb.note("Writing buildhistory")
+                bb.build.exec_func("buildhistory_write_sigs", d)
                 localdata = bb.data.createCopy(e.data)
                 localdata.setVar('BUILDHISTORY_BUILD_FAILURES', str(e._failures))
                 interrupted = getattr(e, '_interrupted', 0)
diff --git a/meta/lib/oe/sstatesig.py b/meta/lib/oe/sstatesig.py
index 8d93013..3239bc6 100644
--- a/meta/lib/oe/sstatesig.py
+++ b/meta/lib/oe/sstatesig.py
@@ -211,6 +211,16 @@ class SignatureGeneratorOEBasicHash(bb.siggen.SignatureGeneratorBasicHash):
                 f.write('    "\n')
             f.write('SIGGEN_LOCKEDSIGS_TYPES_%s = "%s"' % (self.machine, " ".join(l)))
 
+    def dump_siglist(self, sigfile):
+        with open(sigfile, "w") as f:
+            tasks = []
+            for taskitem in self.taskhash:
+                (fn, task) = taskitem.rsplit(".", 1)
+                pn = self.lockedpnmap[fn]
+                tasks.append((pn, task, self.taskhash[taskitem]))
+            for (pn, task, taskhash) in sorted(tasks):
+                f.write('%s.%s %s\n' % (pn, task, taskhash))
+
     def checkhashes(self, missed, ret, sq_fn, sq_task, sq_hash, sq_hashfn, d):
         warn_msgs = []
         error_msgs = []