diff --git a/poky/scripts/contrib/build-perf-test-wrapper.sh b/poky/scripts/contrib/build-perf-test-wrapper.sh
index 19bee1d..7cbb5d7 100755
--- a/poky/scripts/contrib/build-perf-test-wrapper.sh
+++ b/poky/scripts/contrib/build-perf-test-wrapper.sh
@@ -33,7 +33,9 @@
   -c COMMITISH      test (checkout) this commit, <branch>:<commit> can be
                     specified to test specific commit of certain branch
   -C GIT_REPO       commit results into Git
+  -d DOWNLOAD_DIR   directory to store downloaded sources in
   -E EMAIL_ADDR     send email report
+  -g GLOBALRES_DIR  where to place the globalres file
   -P GIT_REMOTE     push results to a remote Git repository
   -R DEST           rsync reports to a remote destination
   -w WORK_DIR       work dir for this script
@@ -51,19 +53,26 @@
 commitish=""
 oe_build_perf_test_extra_opts=()
 oe_git_archive_extra_opts=()
-while getopts "ha:c:C:E:P:R:w:x" opt; do
+while getopts "ha:c:C:d:E:g:P:R:w:x" opt; do
     case $opt in
         h)  usage
             exit 0
             ;;
-        a)  archive_dir=`realpath -s "$OPTARG"`
+        a)  mkdir -p "$OPTARG"
+            archive_dir=`realpath -s "$OPTARG"`
             ;;
         c)  commitish=$OPTARG
             ;;
-        C)  results_repo=`realpath -s "$OPTARG"`
+        C)  mkdir -p "$OPTARG"
+            results_repo=`realpath -s "$OPTARG"`
+            ;;
+        d)  download_dir=`realpath -s "$OPTARG"`
             ;;
         E)  email_to="$OPTARG"
             ;;
+        g)  mkdir -p "$OPTARG"
+            globalres_dir=`realpath -s "$OPTARG"`
+            ;;
         P)  oe_git_archive_extra_opts+=("--push" "$OPTARG")
             ;;
         R)  rsync_dst="$OPTARG"
@@ -86,6 +95,17 @@
     exit 1
 fi
 
+if [ -n "$email_to" ]; then
+    if ! [ -x "$(command -v phantomjs)" ]; then
+        echo "ERROR: Sending email needs phantomjs."
+        exit 1
+    fi
+    if ! [ -x "$(command -v optipng)" ]; then
+        echo "ERROR: Sending email needs optipng."
+        exit 1
+    fi
+fi
+
 # Open a file descriptor for flock and acquire lock
 LOCK_FILE="/tmp/oe-build-perf-test-wrapper.lock"
 if ! exec 3> "$LOCK_FILE"; then
@@ -146,11 +166,18 @@
 fi
 echo "Using working dir $base_dir"
 
+if [ -z "$download_dir" ]; then
+    download_dir="$base_dir/downloads"
+fi
+if [ -z "$globalres_dir" ]; then
+    globalres_dir="$base_dir"
+fi
+
 timestamp=`date "+%Y%m%d%H%M%S"`
 git_rev=$(git rev-parse --short HEAD)  || exit 1
 build_dir="$base_dir/build-$git_rev-$timestamp"
 results_dir="$base_dir/results-$git_rev-$timestamp"
-globalres_log="$base_dir/globalres.log"
+globalres_log="$globalres_dir/globalres.log"
 machine="qemux86"
 
 mkdir -p "$base_dir"
@@ -161,7 +188,7 @@
 echo "MACHINE = \"$machine\"" > "$auto_conf"
 echo 'BB_NUMBER_THREADS = "8"' >> "$auto_conf"
 echo 'PARALLEL_MAKE = "-j 8"' >> "$auto_conf"
-echo "DL_DIR = \"$base_dir/downloads\"" >> "$auto_conf"
+echo "DL_DIR = \"$download_dir\"" >> "$auto_conf"
 # Disabling network sanity check slightly reduces the variance of timing results
 echo 'CONNECTIVITY_CHECK_URIS = ""' >> "$auto_conf"
 # Possibility to define extra settings
diff --git a/poky/scripts/contrib/build-perf-test.sh b/poky/scripts/contrib/build-perf-test.sh
deleted file mode 100755
index 9a091ed..0000000
--- a/poky/scripts/contrib/build-perf-test.sh
+++ /dev/null
@@ -1,400 +0,0 @@
-#!/bin/bash
-#
-# This script runs a series of tests  (with and without sstate) and reports build time (and tmp/ size)
-# 
-# Build performance test script
-#
-# Copyright 2013 Intel Corporation
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-#
-#
-# AUTHORS:
-# Stefan Stanacar <stefanx.stanacar@intel.com>
-
-
-ME=$(basename $0)
-
-#
-# usage and setup
-#
-
-usage () {
-cat << EOT
-Usage: $ME [-h]
-       $ME [-c <commit>] [-v] [-m <val>] [-j <val>] [-t <val>] [-i <image-name>] [-d <path>]
-Options:
-        -h
-                Display this help and exit.
-        -c <commit>
-                git checkout <commit> before anything else
-        -v
-                Show bitbake output, don't redirect it to a log.
-        -m <machine>
-                Value for MACHINE. Default is qemux86.
-        -j <val>
-                Value for PARALLEL_MAKE. Default is 8. 
-        -t <val>
-                Value for BB_NUMBER_THREADS. Default is 8.
-        -i <image-name>
-                Instead of timing against core-image-sato, use <image-name>
-        -d <path>
-                Use <path> as DL_DIR
-        -p <githash>
-                Cherry pick githash onto the commit
-                
-Note: current working directory must be inside a poky git clone.
- 
-EOT
-}
-
-
-if clonedir=$(git rev-parse --show-toplevel); then
-        cd $clonedir
-else
-        echo "The current working dir doesn't seem to be a poky git clone. Please cd there before running $ME"
-        exit 1
-fi
-
-IMAGE="core-image-sato"
-verbose=0
-dldir=
-commit=
-pmake=
-cherrypicks=
-while getopts "hvc:m:j:t:i:d:p:" opt; do
-        case $opt in
-                h)      usage
-                        exit 0
-                        ;;
-                v)      verbose=1
-                        ;;
-                c)      commit=$OPTARG
-                        ;;
-                m)      export MACHINE=$OPTARG
-                        ;;
-                j)      pmake=$OPTARG
-                        ;;
-                t)      export BB_NUMBER_THREADS=$OPTARG
-                        ;;
-                i)      IMAGE=$OPTARG
-                        ;;
-                d)      dldir=$OPTARG
-                        ;;
-                p)      cherrypicks="$cherrypicks $OPTARG"
-                        ;;
-                *)      usage
-                        exit 1
-                        ;;                      
-        esac
-done
-
-
-#drop cached credentials and test for sudo access without a password
-sudo -k -n ls > /dev/null 2>&1
-reqpass=$?
-if [ $reqpass -ne 0 ]; then
-    echo "The script requires sudo access to drop caches between builds (echo 3 > /proc/sys/vm/drop_caches)"
-    read -s -p "Please enter your sudo password: " pass
-    echo
-fi
-
-if [ -n "$commit" ]; then
-            echo "git checkout -f $commit"
-            git pull > /dev/null 2>&1
-            git checkout -f $commit || exit 1
-            git pull > /dev/null 2>&1
-fi
-
-if [ -n "$cherrypicks" ]; then
-    for c in $cherrypicks; do
-        git cherry-pick $c
-    done
-fi
-
-rev=$(git rev-parse --short HEAD)  || exit 1
-OUTDIR="$clonedir/build-perf-test/results-$rev-`date "+%Y%m%d%H%M%S"`"
-BUILDDIR="$OUTDIR/build"
-resultsfile="$OUTDIR/results.log"
-cmdoutput="$OUTDIR/commands.log"
-myoutput="$OUTDIR/output.log"
-globalres="$clonedir/build-perf-test/globalres.log"
-
-mkdir -p $OUTDIR || exit 1
-                                
-log () {
-    local msg="$1"
-    echo "`date`: $msg" | tee -a $myoutput
-}
-
-
-#
-# Config stuff
-#
-
-branch=`git branch 2>&1 | grep "^* " | tr -d "* "`
-gitcommit=$(git rev-parse HEAD)  || exit 1
-log "Running on $branch:$gitcommit"
-
-source ./oe-init-build-env $OUTDIR/build >/dev/null || exit 1
-cd $OUTDIR/build
-
-[ -n "$MACHINE" ] || export MACHINE="qemux86"
-[ -n "$BB_NUMBER_THREADS" ] || export BB_NUMBER_THREADS="8"
-
-if [ -n "$pmake" ]; then
-        export PARALLEL_MAKE="-j $pmake"
-else
-        export PARALLEL_MAKE="-j 8"
-fi
-
-if [ -n "$dldir" ]; then
-    echo "DL_DIR = \"$dldir\"" >> conf/local.conf
-else
-    echo "DL_DIR = \"$clonedir/build-perf-test/downloads\"" >> conf/local.conf
-fi
-
-# Sometimes I've noticed big differences in timings for the same commit, on the same machine
-# Disabling the network sanity check helps a bit (because of my crappy network connection and/or proxy)
-echo "CONNECTIVITY_CHECK_URIS =\"\"" >> conf/local.conf
-
-
-#
-# Functions
-#
-
-declare -a TIMES
-time_count=0
-declare -a SIZES
-size_count=0
-
-time_cmd () {
-    log "   Timing: $*"
-
-    if [ $verbose -eq 0 ]; then 
-        /usr/bin/time -v -o $resultsfile "$@" >> $cmdoutput
-    else
-        /usr/bin/time -v -o $resultsfile "$@"
-    fi
-    ret=$?
-    if [ $ret -eq 0 ]; then
-        t=`grep wall $resultsfile | sed 's/.*m:ss): //'`
-        log "   TIME: $t"
-        TIMES[(( time_count++ ))]="$t"
-    else
-        log "ERROR: exit status was non-zero, will report time as 0."
-        TIMES[(( time_count++ ))]="0"
-    fi
-    
-    #time by default overwrites the output file and we  want to keep the results
-    #it has an append option but I don't want to clobber the results in the same file
-    i=`ls $OUTDIR/results.log* |wc -l`
-    mv $resultsfile "${resultsfile}.${i}"
-    log "More stats can be found in ${resultsfile}.${i}"    
-}
-
-bbtime () {
-    time_cmd bitbake "$@"
-}
-
-#we don't time bitbake here
-bbnotime () {
-    local arg="$@"
-    log "   Running: bitbake ${arg}"
-    if [ $verbose -eq 0 ]; then
-        bitbake ${arg} >> $cmdoutput
-    else
-        bitbake ${arg}
-    fi
-    ret=$?
-    if [ $ret -eq 0 ]; then
-        log "   Finished bitbake ${arg}"
-    else
-        log "ERROR: exit status was non-zero. Exit.."
-        exit $ret
-    fi
-
-}
-
-do_rmtmp() {
-    log "   Removing tmp"
-    rm -rf bitbake.lock pseudodone conf/sanity_info cache tmp
-}
-do_rmsstate () {
-    log "   Removing sstate-cache"
-    rm -rf sstate-cache
-}
-do_sync () {
-    log "   Syncing and dropping caches"
-    sync; sync
-    if [ $reqpass -eq 0 ]; then
-        sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"
-    else
-        echo "$pass" | sudo -S sh -c "echo 3 > /proc/sys/vm/drop_caches"
-        echo
-    fi
-    sleep 3
-}
-
-write_results() {
-    echo -n "`uname -n`,$branch:$gitcommit,`git describe`," >> $globalres
-    for i in "${TIMES[@]}"; do
-        echo -n "$i," >> $globalres
-    done
-    for i in "${SIZES[@]}"; do
-        echo -n "$i," >> $globalres
-    done
-    echo >> $globalres
-    sed -i '$ s/,$//' $globalres
-}
-
-####
-
-#
-# Test 1
-# Measure: Wall clock of "bitbake core-image-sato" and size of tmp/dir (w/o rm_work and w/ rm_work)
-# Pre: Downloaded sources, no sstate
-# Steps:
-#     Part1:
-#        - fetchall 
-#        - clean build dir
-#        - time bitbake core-image-sato
-#        - collect data
-#     Part2:
-#        - bitbake virtual/kernel -c cleansstate
-#        - time bitbake virtual/kernel
-#     Part3:
-#        - add INHERIT to local.conf
-#        - clean build dir
-#        - build
-#        - report size, remove INHERIT
-
-test1_p1 () {
-    log "Running Test 1, part 1/3: Measure wall clock of bitbake $IMAGE and size of tmp/ dir"
-    bbnotime $IMAGE --runall=fetch
-    do_rmtmp
-    do_rmsstate
-    do_sync
-    bbtime $IMAGE
-    s=`du -s tmp | sed 's/tmp//' | sed 's/[ \t]*$//'`
-    SIZES[(( size_count++ ))]="$s"
-    log "SIZE of tmp dir is: $s"
-    log "Buildstats are saved in $OUTDIR/buildstats-test1"
-    mv tmp/buildstats $OUTDIR/buildstats-test1
-}
-
-
-test1_p2 () {
-    log "Running Test 1, part 2/3: bitbake virtual/kernel -c cleansstate and time bitbake virtual/kernel"
-    bbnotime virtual/kernel -c cleansstate
-    do_sync
-    bbtime virtual/kernel
-}
-
-test1_p3 () {
-    log "Running Test 1, part 3/3: Build $IMAGE w/o sstate and report size of tmp/dir with rm_work enabled"
-    echo "INHERIT += \"rm_work\"" >> conf/local.conf
-    do_rmtmp
-    do_rmsstate
-    do_sync
-    bbtime $IMAGE
-    sed -i 's/INHERIT += \"rm_work\"//' conf/local.conf
-    s=`du -s tmp | sed 's/tmp//' | sed 's/[ \t]*$//'`
-    SIZES[(( size_count++ ))]="$s"
-    log "SIZE of tmp dir is: $s"
-    log "Buildstats are saved in $OUTDIR/buildstats-test13"
-    mv tmp/buildstats $OUTDIR/buildstats-test13
-}
-
-
-#
-# Test 2
-# Measure: Wall clock of "bitbake core-image-sato" and size of tmp/dir
-# Pre: populated sstate cache
-
-test2 () {
-    # Assuming test 1 has run
-    log "Running Test 2: Measure wall clock of bitbake $IMAGE -c rootfs with sstate"
-    do_rmtmp
-    do_sync
-    bbtime $IMAGE -c rootfs
-}
-
-
-# Test 3
-# parsing time metrics
-#
-#  Start with
-#   i) "rm -rf tmp/cache; time bitbake -p"
-#  ii) "rm -rf tmp/cache/default-glibc/; time bitbake -p"
-# iii) "time bitbake -p"
-
-
-test3 () {
-    log "Running Test 3: Parsing time metrics (bitbake -p)"
-    log "   Removing tmp/cache && cache"
-    rm -rf tmp/cache cache
-    bbtime -p
-    log "   Removing tmp/cache/default-glibc/"
-    rm -rf tmp/cache/default-glibc/
-    bbtime -p
-    bbtime -p
-}
-
-#
-# Test 4 - eSDK
-# Measure: eSDK size and installation time
-test4 () {
-    log "Running Test 4: eSDK size and installation time"
-    bbnotime $IMAGE -c do_populate_sdk_ext
-
-    esdk_installer=(tmp/deploy/sdk/*-toolchain-ext-*.sh)
-
-    if [ ${#esdk_installer[*]} -eq 1 ]; then
-        s=$((`stat -c %s "$esdk_installer"` / 1024))
-        SIZES[(( size_count++ ))]="$s"
-        log "Download SIZE of eSDK is: $s kB"
-
-        do_sync
-        time_cmd "$esdk_installer" -y -d "tmp/esdk-deploy"
-
-        s=$((`du -sb "tmp/esdk-deploy" | cut -f1` / 1024))
-        SIZES[(( size_count++ ))]="$s"
-        log "Install SIZE of eSDK is: $s kB"
-    else
-        log "ERROR: other than one sdk found (${esdk_installer[*]}), reporting size and time as 0."
-        SIZES[(( size_count++ ))]="0"
-        TIMES[(( time_count++ ))]="0"
-    fi
-
-}
-
-
-# RUN!
-
-test1_p1
-test1_p2
-test1_p3
-test2
-test3
-test4
-
-# if we got til here write to global results
-write_results
-
-log "All done, cleaning up..."
-
-do_rmtmp
-do_rmsstate
diff --git a/poky/scripts/lib/buildstats.py b/poky/scripts/lib/buildstats.py
index d9aadf3..f7db3ea 100644
--- a/poky/scripts/lib/buildstats.py
+++ b/poky/scripts/lib/buildstats.py
@@ -263,7 +263,7 @@
         """Aggregate other buildstats into this"""
         if set(self.keys()) != set(buildstats.keys()):
             raise ValueError("Refusing to aggregate buildstats, set of "
-                             "recipes is different")
+                             "recipes is different: %s" % (set(self.keys()) ^ set(buildstats.keys())))
         for pkg, data in buildstats.items():
             self[pkg].aggregate(data)
 
diff --git a/poky/scripts/lib/checklayer/__init__.py b/poky/scripts/lib/checklayer/__init__.py
index 7788041..670f0ee 100644
--- a/poky/scripts/lib/checklayer/__init__.py
+++ b/poky/scripts/lib/checklayer/__init__.py
@@ -196,38 +196,36 @@
     if layer_depends is None:
         return False
     else:
-        # Don't add a layer that is already present.
-        added = set()
-        output = check_command('Getting existing layers failed.', 'bitbake-layers show-layers').decode('utf-8')
-        for layer, path, pri in re.findall(r'^(\S+) +([^\n]*?) +(\d+)$', output, re.MULTILINE):
-            added.add(path)
+        add_layers(bblayersconf, layer_depends, logger)
 
-        for layer_depend in layer_depends:
-            name = layer_depend['name']
-            path = layer_depend['path']
+    return True
+
+def add_layers(bblayersconf, layers, logger):
+    # Don't add a layer that is already present.
+    added = set()
+    output = check_command('Getting existing layers failed.', 'bitbake-layers show-layers').decode('utf-8')
+    for layer, path, pri in re.findall(r'^(\S+) +([^\n]*?) +(\d+)$', output, re.MULTILINE):
+        added.add(path)
+
+    with open(bblayersconf, 'a+') as f:
+        for layer in layers:
+            logger.info('Adding layer %s' % layer['name'])
+            name = layer['name']
+            path = layer['path']
             if path in added:
-                continue
+                logger.info('%s is already in %s' % (name, bblayersconf))
             else:
                 added.add(path)
-            logger.info('Adding layer dependency %s' % name)
-            with open(bblayersconf, 'a+') as f:
                 f.write("\nBBLAYERS += \"%s\"\n" % path)
     return True
 
-def add_layer(bblayersconf, layer, layers, logger):
-    logger.info('Adding layer %s' % layer['name'])
-    with open(bblayersconf, 'a+') as f:
-        f.write("\nBBLAYERS += \"%s\"\n" % layer['path'])
-
-    return True
-
-def check_command(error_msg, cmd):
+def check_command(error_msg, cmd, cwd=None):
     '''
     Run a command under a shell, capture stdout and stderr in a single stream,
     throw an error when command returns non-zero exit code. Returns the output.
     '''
 
-    p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, cwd=cwd)
     output, _ = p.communicate()
     if p.returncode:
         msg = "%s\nCommand: %s\nOutput:\n%s" % (error_msg, cmd, output.decode('utf-8'))
@@ -257,7 +255,7 @@
         os.unlink(sigs_file)
     try:
         check_command('Generating signatures failed. This might be due to some parse error and/or general layer incompatibilities.',
-                      cmd)
+                      cmd, builddir)
     except RuntimeError as ex:
         if failsafe and os.path.exists(sigs_file):
             # Ignore the error here. Most likely some recipes active
diff --git a/poky/scripts/lib/devtool/standard.py b/poky/scripts/lib/devtool/standard.py
index d14b7a6..b7d4d47 100644
--- a/poky/scripts/lib/devtool/standard.py
+++ b/poky/scripts/lib/devtool/standard.py
@@ -509,6 +509,11 @@
             if not 'flag' in event:
                 if event['op'].startswith(('_append[', '_prepend[')):
                     extra_overrides.append(event['op'].split('[')[1].split(']')[0])
+        # We want to remove duplicate overrides. If a recipe had multiple
+        # SRC_URI_override += values it would cause mulitple instances of
+        # overrides. This doesn't play nicely with things like creating a
+        # branch for every instance of DEVTOOL_EXTRA_OVERRIDES.
+        extra_overrides = list(set(extra_overrides))
         if extra_overrides:
             logger.info('SRC_URI contains some conditional appends/prepends - will create branches to represent these')
 
@@ -769,9 +774,13 @@
             check_commits = True
         else:
             if os.path.exists(os.path.join(srctree, '.git')):
-                # Check if it's a tree previously extracted by us
+                # Check if it's a tree previously extracted by us. This is done
+                # by ensuring that devtool-base and args.branch (devtool) exist.
+                # The check_commits logic will cause an exception if either one
+                # of these doesn't exist
                 try:
                     (stdout, _) = bb.process.run('git branch --contains devtool-base', cwd=srctree)
+                    bb.process.run('git rev-parse %s' % args.branch, cwd=srctree)
                 except bb.process.ExecutionError:
                     stdout = ''
                 if stdout:
diff --git a/poky/scripts/lib/wic/engine.py b/poky/scripts/lib/wic/engine.py
index 4662c66..ea600d2 100644
--- a/poky/scripts/lib/wic/engine.py
+++ b/poky/scripts/lib/wic/engine.py
@@ -245,9 +245,16 @@
         self._ptable_format = None
 
         # find parted
-        self.paths = "/bin:/usr/bin:/usr/sbin:/sbin/"
+        # read paths from $PATH environment variable
+        # if it fails, use hardcoded paths
+        pathlist = "/bin:/usr/bin:/usr/sbin:/sbin/"
+        try:
+            self.paths = os.environ['PATH'] + ":" + pathlist
+        except KeyError:
+            self.paths = pathlist
+
         if native_sysroot:
-            for path in self.paths.split(':'):
+            for path in pathlist.split(':'):
                 self.paths = "%s%s:%s" % (native_sysroot, path, self.paths)
 
         self.parted = find_executable("parted", self.paths)
@@ -331,7 +338,7 @@
     def copy(self, src, pnum, path):
         """Copy partition image into wic image."""
         if self.partitions[pnum].fstype.startswith('ext'):
-            cmd = "echo -e 'cd {}\nwrite {} {}' | {} -w {}".\
+            cmd = "printf 'cd {}\nwrite {} {}' | {} -w {}".\
                       format(path, src, os.path.basename(src),
                              self.debugfs, self._get_part_image(pnum))
         else: # fat
diff --git a/poky/scripts/multilib_header_wrapper.h b/poky/scripts/multilib_header_wrapper.h
index 9660225..4824790 100644
--- a/poky/scripts/multilib_header_wrapper.h
+++ b/poky/scripts/multilib_header_wrapper.h
@@ -21,6 +21,7 @@
  * 
  */
 
+#pragma once
 
 #if defined (__bpf__)
 #define __MHWORDSIZE			64
diff --git a/poky/scripts/oe-build-perf-report b/poky/scripts/oe-build-perf-report
index 0bd05f4..f6fb458 100755
--- a/poky/scripts/oe-build-perf-report
+++ b/poky/scripts/oe-build-perf-report
@@ -37,58 +37,18 @@
 scriptpath.add_oe_lib_path()
 
 from oeqa.utils.git import GitRepo, GitError
+import oeqa.utils.gitarchive as gitarchive
 
 
 # Setup logging
 logging.basicConfig(level=logging.INFO, format="%(levelname)s: %(message)s")
 log = logging.getLogger('oe-build-perf-report')
 
-
-# Container class for tester revisions
-TestedRev = namedtuple('TestedRev', 'commit commit_number tags')
-
-
-def get_test_runs(repo, tag_name, **kwargs):
-    """Get a sorted list of test runs, matching given pattern"""
-    # First, get field names from the tag name pattern
-    field_names = [m.group(1) for m in re.finditer(r'{(\w+)}', tag_name)]
-    undef_fields = [f for f in field_names if f not in kwargs.keys()]
-
-    # Fields for formatting tag name pattern
-    str_fields = dict([(f, '*') for f in field_names])
-    str_fields.update(kwargs)
-
-    # Get a list of all matching tags
-    tag_pattern = tag_name.format(**str_fields)
-    tags = repo.run_cmd(['tag', '-l', tag_pattern]).splitlines()
-    log.debug("Found %d tags matching pattern '%s'", len(tags), tag_pattern)
-
-    # Parse undefined fields from tag names
-    str_fields = dict([(f, r'(?P<{}>[\w\-.()]+)'.format(f)) for f in field_names])
-    str_fields['branch'] = r'(?P<branch>[\w\-.()/]+)'
-    str_fields['commit'] = '(?P<commit>[0-9a-f]{7,40})'
-    str_fields['commit_number'] = '(?P<commit_number>[0-9]{1,7})'
-    str_fields['tag_number'] = '(?P<tag_number>[0-9]{1,5})'
-    # escape parenthesis in fields in order to not messa up the regexp
-    fixed_fields = dict([(k, v.replace('(', r'\(').replace(')', r'\)')) for k, v in kwargs.items()])
-    str_fields.update(fixed_fields)
-    tag_re = re.compile(tag_name.format(**str_fields))
-
-    # Parse fields from tags
-    revs = []
-    for tag in tags:
-        m = tag_re.match(tag)
-        groups = m.groupdict()
-        revs.append([groups[f] for f in undef_fields] + [tag])
-
-    # Return field names and a sorted list of revs
-    return undef_fields, sorted(revs)
-
 def list_test_revs(repo, tag_name, verbosity, **kwargs):
     """Get list of all tested revisions"""
     valid_kwargs = dict([(k, v) for k, v in kwargs.items() if v is not None])
 
-    fields, revs = get_test_runs(repo, tag_name, **valid_kwargs)
+    fields, revs = gitarchive.get_test_runs(log, repo, tag_name, **valid_kwargs)
     ignore_fields = ['tag_number']
     if verbosity < 2:
         extra_fields = ['COMMITS', 'TEST RUNS']
@@ -133,36 +93,6 @@
 
     print_table(rows)
 
-def get_test_revs(repo, tag_name, **kwargs):
-    """Get list of all tested revisions"""
-    fields, runs = get_test_runs(repo, tag_name, **kwargs)
-
-    revs = {}
-    commit_i = fields.index('commit')
-    commit_num_i = fields.index('commit_number')
-    for run in runs:
-        commit = run[commit_i]
-        commit_num = run[commit_num_i]
-        tag = run[-1]
-        if not commit in revs:
-            revs[commit] = TestedRev(commit, commit_num, [tag])
-        else:
-            assert commit_num == revs[commit].commit_number, "Commit numbers do not match"
-            revs[commit].tags.append(tag)
-
-    # Return in sorted table
-    revs = sorted(revs.values(), key=attrgetter('commit_number'))
-    log.debug("Found %d tested revisions:\n    %s", len(revs),
-              "\n    ".join(['{} ({})'.format(rev.commit_number, rev.commit) for rev in revs]))
-    return revs
-
-def rev_find(revs, attr, val):
-    """Search from a list of TestedRev"""
-    for i, rev in enumerate(revs):
-        if getattr(rev, attr) == val:
-            return i
-    raise ValueError("Unable to find '{}' value '{}'".format(attr, val))
-
 def is_xml_format(repo, commit):
     """Check if the commit contains xml (or json) data"""
     if repo.rev_parse(commit + ':results.xml'):
@@ -427,8 +357,8 @@
 
             # Compare buildstats
             bs_key = test + '.' + meas
-            rev = metadata['commit_num']['value']
-            comp_rev = metadata['commit_num']['value_old']
+            rev = str(metadata['commit_num']['value'])
+            comp_rev = str(metadata['commit_num']['value_old'])
             if (rev in buildstats and bs_key in buildstats[rev] and
                     comp_rev in buildstats and bs_key in buildstats[comp_rev]):
                 new_meas['buildstats'] = BSSummary(buildstats[comp_rev][bs_key],
@@ -512,10 +442,10 @@
 
         key = split[0]
         val = split[1].strip()
-        if key == 'hostname':
+        if key == 'hostname' and not args.hostname:
             log.debug("Using hostname %s", val)
             args.hostname = val
-        elif key == 'branch':
+        elif key == 'branch' and not args.branch:
             log.debug("Using branch %s", val)
             args.branch = val
 
@@ -541,7 +471,8 @@
                        default='{hostname}/{branch}/{machine}/{commit_number}-g{commit}/{tag_number}',
                        help="Tag name (pattern) for finding results")
     group.add_argument('--hostname', '-H')
-    group.add_argument('--branch', '-B', default='master')
+    group.add_argument('--branch', '-B', default='master', help="Branch to find commit in")
+    group.add_argument('--branch2', help="Branch to find comparision revisions in")
     group.add_argument('--machine', default='qemux86')
     group.add_argument('--history-length', default=25, type=int,
                        help="Number of tested revisions to plot in html report")
@@ -577,32 +508,51 @@
     if not args.hostname:
         auto_args(repo, args)
 
-    revs = get_test_revs(repo, args.tag_name, hostname=args.hostname,
-                         branch=args.branch, machine=args.machine)
-    if len(revs) < 2:
-        log.error("%d tester revisions found, unable to generate report",
-                  len(revs))
-        return 1
+    revs = gitarchive.get_test_revs(log, repo, args.tag_name, hostname=args.hostname,
+                                    branch=args.branch, machine=args.machine)
+    if args.branch2:
+        revs2 = gitarchive.get_test_revs(log, repo, args.tag_name, hostname=args.hostname,
+                                         branch=args.branch2, machine=args.machine)
+        if not len(revs2):
+            log.error("No revisions found to compare against")
+            return 1
+        if not len(revs):
+            log.error("No revision to report on found")
+            return 1
+    else:
+        if len(revs) < 2:
+            log.error("Only %d tester revisions found, unable to generate report" % len(revs))
+            return 1
 
     # Pick revisions
     if args.commit:
         if args.commit_number:
             log.warning("Ignoring --commit-number as --commit was specified")
-        index1 = rev_find(revs, 'commit', args.commit)
+        index1 = gitarchive.rev_find(revs, 'commit', args.commit)
     elif args.commit_number:
-        index1 = rev_find(revs, 'commit_number', args.commit_number)
+        index1 = gitarchive.rev_find(revs, 'commit_number', args.commit_number)
     else:
         index1 = len(revs) - 1
 
+    if args.branch2:
+        revs2.append(revs[index1])
+        index1 = len(revs2) - 1
+        revs = revs2
+
     if args.commit2:
         if args.commit_number2:
             log.warning("Ignoring --commit-number2 as --commit2 was specified")
-        index2 = rev_find(revs, 'commit', args.commit2)
+        index2 = gitarchive.rev_find(revs, 'commit', args.commit2)
     elif args.commit_number2:
-        index2 = rev_find(revs, 'commit_number', args.commit_number2)
+        index2 = gitarchive.rev_find(revs, 'commit_number', args.commit_number2)
     else:
         if index1 > 0:
             index2 = index1 - 1
+            # Find the closest matching commit number for comparision
+            # In future we could check the commit is a common ancestor and
+            # continue back if not but this good enough for now
+            while index2 > 0 and revs[index2].commit_number > revs[index1].commit_number:
+                index2 = index2 - 1
         else:
             log.error("Unable to determine the other commit, use "
                       "--commit2 or --commit-number2 to specify it")
diff --git a/poky/scripts/oe-git-archive b/poky/scripts/oe-git-archive
index 913291a..ab1c2b9 100755
--- a/poky/scripts/oe-git-archive
+++ b/poky/scripts/oe-git-archive
@@ -14,16 +14,10 @@
 # more details.
 #
 import argparse
-import glob
-import json
 import logging
-import math
 import os
 import re
 import sys
-from collections import namedtuple, OrderedDict
-from datetime import datetime, timedelta, tzinfo
-from operator import attrgetter
 
 # Import oe and bitbake libs
 scripts_path = os.path.dirname(os.path.realpath(__file__))
@@ -34,128 +28,13 @@
 
 from oeqa.utils.git import GitRepo, GitError
 from oeqa.utils.metadata import metadata_from_bb
-
+import oeqa.utils.gitarchive as gitarchive
 
 # Setup logging
 logging.basicConfig(level=logging.INFO, format="%(levelname)s: %(message)s")
 log = logging.getLogger()
 
 
-class ArchiveError(Exception):
-    """Internal error handling of this script"""
-
-
-def format_str(string, fields):
-    """Format string using the given fields (dict)"""
-    try:
-        return string.format(**fields)
-    except KeyError as err:
-        raise ArchiveError("Unable to expand string '{}': unknown field {} "
-                           "(valid fields are: {})".format(
-                               string, err, ', '.join(sorted(fields.keys()))))
-
-
-def init_git_repo(path, no_create, bare):
-    """Initialize local Git repository"""
-    path = os.path.abspath(path)
-    if os.path.isfile(path):
-        raise ArchiveError("Invalid Git repo at {}: path exists but is not a "
-                           "directory".format(path))
-    if not os.path.isdir(path) or not os.listdir(path):
-        if no_create:
-            raise ArchiveError("No git repo at {}, refusing to create "
-                               "one".format(path))
-        if not os.path.isdir(path):
-            try:
-                os.mkdir(path)
-            except (FileNotFoundError, PermissionError) as err:
-                raise ArchiveError("Failed to mkdir {}: {}".format(path, err))
-        if not os.listdir(path):
-            log.info("Initializing a new Git repo at %s", path)
-            repo = GitRepo.init(path, bare)
-    try:
-        repo = GitRepo(path, is_topdir=True)
-    except GitError:
-        raise ArchiveError("Non-empty directory that is not a Git repository "
-                           "at {}\nPlease specify an existing Git repository, "
-                           "an empty directory or a non-existing directory "
-                           "path.".format(path))
-    return repo
-
-
-def git_commit_data(repo, data_dir, branch, message, exclude, notes):
-    """Commit data into a Git repository"""
-    log.info("Committing data into to branch %s", branch)
-    tmp_index = os.path.join(repo.git_dir, 'index.oe-git-archive')
-    try:
-        # Create new tree object from the data
-        env_update = {'GIT_INDEX_FILE': tmp_index,
-                      'GIT_WORK_TREE': os.path.abspath(data_dir)}
-        repo.run_cmd('add .', env_update)
-
-        # Remove files that are excluded
-        if exclude:
-            repo.run_cmd(['rm', '--cached'] + [f for f in exclude], env_update)
-
-        tree = repo.run_cmd('write-tree', env_update)
-
-        # Create new commit object from the tree
-        parent = repo.rev_parse(branch)
-        git_cmd = ['commit-tree', tree, '-m', message]
-        if parent:
-            git_cmd += ['-p', parent]
-        commit = repo.run_cmd(git_cmd, env_update)
-
-        # Create git notes
-        for ref, filename in notes:
-            ref = ref.format(branch_name=branch)
-            repo.run_cmd(['notes', '--ref', ref, 'add',
-                          '-F', os.path.abspath(filename), commit])
-
-        # Update branch head
-        git_cmd = ['update-ref', 'refs/heads/' + branch, commit]
-        if parent:
-            git_cmd.append(parent)
-        repo.run_cmd(git_cmd)
-
-        # Update current HEAD, if we're on branch 'branch'
-        if not repo.bare and repo.get_current_branch() == branch:
-            log.info("Updating %s HEAD to latest commit", repo.top_dir)
-            repo.run_cmd('reset --hard')
-
-        return commit
-    finally:
-        if os.path.exists(tmp_index):
-            os.unlink(tmp_index)
-
-
-def expand_tag_strings(repo, name_pattern, msg_subj_pattern, msg_body_pattern,
-                       keywords):
-    """Generate tag name and message, with support for running id number"""
-    keyws = keywords.copy()
-    # Tag number is handled specially: if not defined, we autoincrement it
-    if 'tag_number' not in keyws:
-        # Fill in all other fields than 'tag_number'
-        keyws['tag_number'] = '{tag_number}'
-        tag_re = format_str(name_pattern, keyws)
-        # Replace parentheses for proper regex matching
-        tag_re = tag_re.replace('(', '\(').replace(')', '\)') + '$'
-        # Inject regex group pattern for 'tag_number'
-        tag_re = tag_re.format(tag_number='(?P<tag_number>[0-9]{1,5})')
-
-        keyws['tag_number'] = 0
-        for existing_tag in repo.run_cmd('tag').splitlines():
-            match = re.match(tag_re, existing_tag)
-
-            if match and int(match.group('tag_number')) >= keyws['tag_number']:
-                keyws['tag_number'] = int(match.group('tag_number')) + 1
-
-    tag_name = format_str(name_pattern, keyws)
-    msg_subj= format_str(msg_subj_pattern.strip(), keyws)
-    msg_body = format_str(msg_body_pattern, keyws)
-    return tag_name, msg_subj + '\n\n' + msg_body
-
-
 def parse_args(argv):
     """Parse command line arguments"""
     parser = argparse.ArgumentParser(
@@ -217,17 +96,11 @@
         return ""
 
 def main(argv=None):
-    """Script entry point"""
     args = parse_args(argv)
     if args.debug:
         log.setLevel(logging.DEBUG)
 
     try:
-        if not os.path.isdir(args.data_dir):
-            raise ArchiveError("Not a directory: {}".format(args.data_dir))
-
-        data_repo = init_git_repo(args.git_dir, args.no_create, args.bare)
-
         # Get keywords to be used in tag and branch names and messages
         metadata = metadata_from_bb()
         keywords = {'hostname': get_nested(metadata, ['hostname']),
@@ -236,39 +109,12 @@
                     'commit_count': get_nested(metadata, ['layers', 'meta', 'commit_count']),
                     'machine': get_nested(metadata, ['config', 'MACHINE'])}
 
-        # Expand strings early in order to avoid getting into inconsistent
-        # state (e.g. no tag even if data was committed)
-        commit_msg = format_str(args.commit_msg_subject.strip(), keywords)
-        commit_msg += '\n\n' + format_str(args.commit_msg_body, keywords)
-        branch_name = format_str(args.branch_name, keywords)
-        tag_name = None
-        if not args.no_tag and args.tag_name:
-            tag_name, tag_msg = expand_tag_strings(data_repo, args.tag_name,
-                                                   args.tag_msg_subject,
-                                                   args.tag_msg_body, keywords)
+        gitarchive.gitarchive(args.data_dir, args.git_dir, args.no_create, args.bare,
+                              args.commit_msg_subject.strip(), args.commit_msg_body, args.branch_name,
+                              args.no_tag, args.tag_name, args.tag_msg_subject, args.tag_msg_body,
+                              args.exclude, args.notes, args.push, keywords, log)
 
-        # Commit data
-        commit = git_commit_data(data_repo, args.data_dir, branch_name,
-                                 commit_msg, args.exclude, args.notes)
-
-        # Create tag
-        if tag_name:
-            log.info("Creating tag %s", tag_name)
-            data_repo.run_cmd(['tag', '-a', '-m', tag_msg, tag_name, commit])
-
-        # Push data to remote
-        if args.push:
-            cmd = ['push', '--tags']
-            # If no remote is given we push with the default settings from
-            # gitconfig
-            if args.push is not True:
-                notes_refs = ['refs/notes/' + ref.format(branch_name=branch_name)
-                                for ref, _ in args.notes]
-                cmd.extend([args.push, branch_name] + notes_refs)
-            log.info("Pushing data to remote")
-            data_repo.run_cmd(cmd)
-
-    except ArchiveError as err:
+    except gitarchive.ArchiveError as err:
         log.error(str(err))
         return 1
 
diff --git a/poky/scripts/oe-git-proxy b/poky/scripts/oe-git-proxy
index 7a43fe6..1800942 100755
--- a/poky/scripts/oe-git-proxy
+++ b/poky/scripts/oe-git-proxy
@@ -131,8 +131,8 @@
 fi
 
 # Connect directly to hosts in NO_PROXY
-for H in ${NO_PROXY//,/ }; do
-	if match_host $1 $H; then
+for H in "${NO_PROXY//,/ }"; do
+	if match_host $1 "$H"; then
 		exec $SOCAT STDIO $METHOD
 	fi
 done
diff --git a/poky/scripts/runqemu b/poky/scripts/runqemu
index 55cdd41..1c96b29 100755
--- a/poky/scripts/runqemu
+++ b/poky/scripts/runqemu
@@ -188,6 +188,7 @@
 
         self.qemu_opt = ''
         self.qemu_opt_script = ''
+        self.qemuparams = ''
         self.clean_nfs_dir = False
         self.nfs_server = ''
         self.rootfs = ''
@@ -455,7 +456,7 @@
             elif arg.startswith('biosfilename='):
                 self.qemu_opt_script += ' -bios %s' % arg[len('biosfilename='):]
             elif arg.startswith('qemuparams='):
-                self.qemu_opt_script += ' %s' % arg[len('qemuparams='):]
+                self.qemuparams = ' %s' % arg[len('qemuparams='):]
             elif arg.startswith('bootparams='):
                 self.bootparams = arg[len('bootparams='):]
             elif os.path.exists(arg) or (re.search(':', arg) and re.search('/', arg)):
@@ -662,13 +663,28 @@
             raise RunQemuError("Invalid custombiosdir: %s" % self.custombiosdir)
 
     def check_mem(self):
-        s = re.search('-m +([0-9]+)', self.qemu_opt_script)
+        """
+        Both qemu and kernel needs memory settings, so check QB_MEM and set it
+        for both.
+        """
+        s = re.search('-m +([0-9]+)', self.qemuparams)
         if s:
             self.set('QB_MEM', '-m %s' % s.group(1))
         elif not self.get('QB_MEM'):
             logger.info('QB_MEM is not set, use 512M by default')
             self.set('QB_MEM', '-m 512')
 
+        # Check and remove M or m suffix
+        qb_mem = self.get('QB_MEM')
+        if qb_mem.endswith('M') or qb_mem.endswith('m'):
+            qb_mem = qb_mem[:-1]
+
+        # Add -m prefix it not present
+        if not qb_mem.startswith('-m'):
+            qb_mem = '-m %s' % qb_mem
+
+        self.set('QB_MEM', qb_mem)
+
         mach = self.get('MACHINE')
         if not mach.startswith('qemumips'):
             self.kernel_cmdline_script += ' mem=%s' % self.get('QB_MEM').replace('-m','').strip() + 'M'
@@ -1164,6 +1180,10 @@
 
         self.qemu_opt += ' ' + self.qemu_opt_script
 
+        # Append qemuparams to override previous settings
+        if self.qemuparams:
+            self.qemu_opt += ' ' + self.qemuparams
+
         if self.snapshot:
             self.qemu_opt += " -snapshot"
 
diff --git a/poky/scripts/send-error-report b/poky/scripts/send-error-report
index 8939f5f..3528cf9 100755
--- a/poky/scripts/send-error-report
+++ b/poky/scripts/send-error-report
@@ -62,7 +62,7 @@
 
 def prepare_data(args):
     # attempt to get the max_log_size from the server's settings
-    max_log_size = getPayloadLimit("http://"+args.server+"/ClientPost/JSON")
+    max_log_size = getPayloadLimit("https://"+args.server+"/ClientPost/JSON")
 
     if not os.path.isfile(args.error_file):
         log.error("No data file found.")
@@ -132,9 +132,9 @@
     headers={'Content-type': 'application/json', 'User-Agent': "send-error-report/"+version}
 
     if args.json:
-        url = "http://"+args.server+"/ClientPost/JSON/"
+        url = "https://"+args.server+"/ClientPost/JSON/"
     else:
-        url = "http://"+args.server+"/ClientPost/"
+        url = "https://"+args.server+"/ClientPost/"
 
     req = urllib.request.Request(url, data=data, headers=headers)
     try:
diff --git a/poky/scripts/yocto-check-layer b/poky/scripts/yocto-check-layer
index 9b7e536..106c955 100755
--- a/poky/scripts/yocto-check-layer
+++ b/poky/scripts/yocto-check-layer
@@ -22,7 +22,7 @@
 scriptpath.add_oe_lib_path()
 scriptpath.add_bitbake_lib_path()
 
-from checklayer import LayerType, detect_layers, add_layer, add_layer_dependencies, get_signatures
+from checklayer import LayerType, detect_layers, add_layers, add_layer_dependencies, get_signatures
 from oeqa.utils.commands import get_bb_vars
 
 PROGNAME = 'yocto-check-layer'
@@ -157,7 +157,7 @@
             layers_tested = layers_tested + 1
             continue
 
-        if any(map(lambda additional_layer: not add_layer(bblayersconf, additional_layer, dep_layers, logger),
+        if any(map(lambda additional_layer: not add_layers(bblayersconf, [additional_layer], logger),
                    additional_layers)):
             logger.info('Skipping %s due to missing additional layers.' % layer['name'])
             results[layer['name']] = None
@@ -179,7 +179,7 @@
             continue
         td['machines'] = args.machines
 
-        if not add_layer(bblayersconf, layer, dep_layers, logger):
+        if not add_layers(bblayersconf, [layer], logger):
             logger.info('Skipping %s ???.' % layer['name'])
             results[layer['name']] = None
             results_status[layer['name']] = 'SKIPPED (Unknown)'
diff --git a/poky/scripts/yocto-check-layer-wrapper b/poky/scripts/yocto-check-layer-wrapper
index bbf6ee1..b5df9ce 100755
--- a/poky/scripts/yocto-check-layer-wrapper
+++ b/poky/scripts/yocto-check-layer-wrapper
@@ -30,7 +30,9 @@
 
 build_dir=$(mktemp -p $base_dir -d -t build-XXXX)
 
-source oe-init-build-env $build_dir
+this_dir=$(dirname $(readlink -f $0))
+
+source $this_dir/../oe-init-build-env $build_dir
 if [[ $output_log != '' ]]; then
 	yocto-check-layer -o "$output_log" "$*"
 else