[travis] generate size report (#4026)

This commit splits the jobs into 2 stages: lint, test.  In the lint
stage, generate size diff report and post into the pull request.

.travis.yml

@@ -40,74 +40,78 @@ before_script:
       sudo sh -c 'echo 0 > /proc/sys/net/ipv6/conf/all/disable_ipv6';
     fi
 
-script:
-  - .travis/script.sh
-
 after_success:
   - .travis/after_success.sh
 
-matrix:
+stages:
+  - lint
+  - test
+
+jobs:
   include:
     - env: BUILD_TARGET="posix-app-cli" VERBOSE=1 VIRTUAL_TIME=1
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix-app-pty" VERBOSE=1 COVERAGE=1
       os: linux
       compiler: clang
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix-app-pty" DAEMON=1 VERBOSE=1 COVERAGE=1
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="android-build" VERBOSE=1
       os: linux
       dist: trusty
       python: "2.7"
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix-distcheck" VERBOSE=1 VIRTUAL_TIME=1
       os: linux
       compiler: clang
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix-32-bit" VERBOSE=1 VIRTUAL_TIME=1
       os: linux
       compiler: gcc
       python: "2.7"
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix-32-bit" VERBOSE=1 VIRTUAL_TIME=1 TIME_SYNC=1
       os: linux
       compiler: gcc
       python: "2.7"
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix-ncp" VERBOSE=1 VIRTUAL_TIME=1
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix-mtd" VERBOSE=1 VIRTUAL_TIME=1
       os: linux
       compiler: gcc
-    - env: BUILD_TARGET="py-pretty-check"
-      os: linux
-      python: "2.7"
-    - env: BUILD_TARGET="pretty-check"
-      os: linux
-      addons:
-        apt:
-          sources:
-            - llvm-toolchain-xenial-6.0
-            - ubuntu-toolchain-r-test
-          packages:
-            - clang-format-6.0
+      script: .travis/script.sh
     - env: BUILD_TARGET="scan-build"
       os: linux
       compiler: clang
+      script: .travis/script.sh
     - env: BUILD_TARGET="arm-gcc-4"
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="arm-gcc-5"
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="arm-gcc-6"
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="arm-gcc-7"
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="arm-gcc-8"
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix" CC="gcc-5" CXX="g++-5"
       os: linux
       compiler: gcc
@@ -118,6 +122,7 @@ matrix:
           packages:
             - gcc-5
             - g++-5
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix" CC="gcc-6" CXX="g++-6"
       os: linux
       compiler: gcc
@@ -128,6 +133,7 @@ matrix:
           packages:
             - gcc-6
             - g++-6
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix" CC="gcc-7" CXX="g++-7"
       os: linux
       compiler: gcc
@@ -138,6 +144,7 @@ matrix:
           packages:
             - gcc-7
             - g++-7
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix" CC="gcc-8" CXX="g++-8"
       os: linux
       compiler: gcc
@@ -148,6 +155,7 @@ matrix:
           packages:
             - gcc-8
             - g++-8
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix" CC="gcc-9" CXX="g++-9"
       os: linux
       compiler: gcc
@@ -158,16 +166,41 @@ matrix:
           packages:
             - gcc-9
             - g++-9
+      script: .travis/script.sh
     - env: BUILD_TARGET="posix-ncp-spi" VERBOSE=1
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="toranj-test-framework" VERBOSE=1
       os: linux
       compiler: gcc
+      script: .travis/script.sh
     - env: BUILD_TARGET="toranj-test-framework" VERBOSE=1 TORANJ_POSIX_APP_RCP_MODEL=1
       os: linux
       compiler: gcc
       python: "2.7"
+      script: .travis/script.sh
     - env: BUILD_TARGET="osx" VERBOSE=1
       os: osx
       language: generic
+      script: .travis/script.sh
+    - stage: lint
+      env: BUILD_TARGET="py-pretty-check"
+      os: linux
+      python: "2.7"
+      script: .travis/script.sh
+    - env: BUILD_TARGET="pretty-check"
+      os: linux
+      addons:
+        apt:
+          sources:
+            - llvm-toolchain-xenial-6.0
+            - ubuntu-toolchain-r-test
+          packages:
+            - clang-format-6.0
+      script: .travis/script.sh
+    - env: BUILD_TARGET="size-report"
+      os: linux
+      compiler: gcc
+      script: .travis/script.sh VERBOSE=1
+      if: type = pull_request

.travis/before_install.sh

@@ -108,7 +108,7 @@ cd /tmp || die
         arm-none-eabi-gcc --version || die
     }
 
-    [ $BUILD_TARGET != arm-gcc-7 ] || {
+    [ $BUILD_TARGET != arm-gcc-7 -a $BUILD_TARGET != size-report ] || {
         wget https://developer.arm.com/-/media/Files/downloads/gnu-rm/7-2018q2/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2 || die
         tar xjf gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2 || die
         export PATH=/tmp/gcc-arm-none-eabi-7-2018-q2-update/bin:$PATH || die

.travis/script.sh

@@ -450,6 +450,48 @@ build_samr21() {
     ./tests/toranj/start.sh || die
 }
 
+[ $BUILD_TARGET != size-report ] || {
+    [ ${TRAVIS_PULL_REQUEST} != false ] || die
+
+    export PATH=/tmp/gcc-arm-none-eabi-7-2018-q2-update/bin:$PATH || die
+
+    mkdir ../output
+
+    export MERGE_BASE_SHA=$(git merge-base HEAD ${TRAVIS_BRANCH})
+
+    # pull request
+    OPENTHREAD_FLAGS="BORDER_AGENT=1 BORDER_ROUTER=1 CHANNEL_MANAGER=1 CHANNEL_MONITOR=1 CHILD_SUPERVISION=1 COAP=1 COAPS=1 COMMISSIONER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DIAGNOSTIC=1 DISABLE_DOC=1 DNS_CLIENT=1 ECDSA=1 FULL_LOGS=1 JAM_DETECTION=1 JOINER=1 LINK_RAW=1 MAC_FILTER=1 MTD_NETDIAG=1 SERVICE=1 SLAAC=1 SNTP_CLIENT=1 TIME_SYNC=1 UDP_FORWARD=1"
+
+    git checkout -- . || die
+    git clean -xfd || die
+    ./bootstrap || die
+    make -f examples/Makefile-nrf52840 ${OPENTHREAD_FLAGS} || die
+    mv output/nrf52840 ../output/nrf52840-b
+
+    git checkout ${MERGE_BASE_SHA}
+    git submodule update --init
+
+    # base branch
+    git checkout -- . || die
+    git clean -xfd || die
+    ./bootstrap || die
+    make -f examples/Makefile-nrf52840 ${OPENTHREAD_FLAGS} || die
+    mv output/nrf52840 ../output/nrf52840-a
+
+    curl -s "${SIZE_REPORT_URL}/bash" > size-report
+    chmod a+x size-report
+
+    ./size-report init OpenThread
+
+    ./size-report size ../output/nrf52840-a/bin/ot-cli-ftd ../output/nrf52840-b/bin/ot-cli-ftd
+    ./size-report size ../output/nrf52840-a/bin/ot-cli-mtd ../output/nrf52840-b/bin/ot-cli-mtd
+    ./size-report size ../output/nrf52840-a/bin/ot-ncp-ftd ../output/nrf52840-b/bin/ot-ncp-ftd
+    ./size-report size ../output/nrf52840-a/bin/ot-ncp-mtd ../output/nrf52840-b/bin/ot-ncp-mtd
+    ./size-report size ../output/nrf52840-a/bin/ot-rcp     ../output/nrf52840-b/bin/ot-rcp
+
+    ./size-report post
+}
+
 [ $BUILD_TARGET != osx ] || {
     git checkout -- . || die
     git clean -xfd || die