circleci: do macOS builds here instead of on Travis CI

This provides several advantages. Among others:
  * Much faster and hopefully more reliable.
  * Good caching support to store LLVM builds.
  * Building and testing of release-ready artifacts.

4 files changed, 91 insertions, 52 deletions

diff --git a/.circleci/config.yml b/.circleci/config.yml
index d9414c557..bc71b59d1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -49,16 +49,19 @@ commands:
             dep ensure --vendor-only
   smoketest:
     steps:
+      - smoketest-no-avr
+      - run: tinygo build -size short -o test.elf -target=arduino             examples/blinky1
+      - run: tinygo build -size short -o test.elf -target=digispark           examples/blinky1
+  smoketest-no-avr:
+    steps:
       - run: tinygo build -size short -o test.elf -target=pca10040            examples/blinky1
       - run: tinygo build -size short -o test.elf -target=pca10040            examples/blinky2
-      - run: tinygo build -size short -o blinky2                              examples/blinky2
+      - run: tinygo build             -o blinky2                              examples/blinky2 # TODO: re-enable -size flag with MachO support
       - run: tinygo build -size short -o test.elf -target=pca10040            examples/test
       - run: tinygo build -size short -o test.elf -target=microbit            examples/echo
       - run: tinygo build -size short -o test.elf -target=nrf52840-mdk        examples/blinky1
       - run: tinygo build -size short -o test.elf -target=pca10031            examples/blinky1
       - run: tinygo build -size short -o test.elf -target=bluepill            examples/blinky1
-      - run: tinygo build -size short -o test.elf -target=arduino             examples/blinky1
-      - run: tinygo build -size short -o test.elf -target=digispark           examples/blinky1
       - run: tinygo build -size short -o test.elf -target=reelboard           examples/blinky1
       - run: tinygo build -size short -o test.elf -target=reelboard           examples/blinky2
       - run: tinygo build -size short -o test.elf -target=pca10056            examples/blinky1
@@ -90,7 +93,7 @@ commands:
           paths:
             - ~/.cache/go-build
             - ~/.cache/tinygo
-  build-release:
+  build-linux:
     steps:
       - checkout
       - submodules
@@ -162,9 +165,9 @@ commands:
           name: "Build TinyGo release"
           command: |
             make release -j3
-            cp -p build/release.tar.gz /tmp/release.tar.gz
+            cp -p build/release.tar.gz /tmp/tinygo.linux-amd64.tar.gz
       - store_artifacts:
-          path: /tmp/release.tar.gz
+          path: /tmp/tinygo.linux-amd64.tar.gz
       - save_cache:
           key: go-cache-{{ checksum "Gopkg.lock" }}-{{ .Environment.CIRCLE_BUILD_NUM }}
           paths:
@@ -174,10 +177,71 @@ commands:
           name: "Extract release tarball"
           command: |
             mkdir -p ~/lib
-            tar -C ~/lib -xf /tmp/release.tar.gz
+            tar -C ~/lib -xf /tmp/tinygo.linux-amd64.tar.gz
             ln -s ~/lib/tinygo/bin/tinygo /go/bin/tinygo
             tinygo version
       - smoketest
+  build-macos:
+    steps:
+      - checkout
+      - submodules
+      - run:
+          name: "Install dependencies"
+          command: |
+            HOMEBREW_NO_AUTO_UPDATE=1 brew install go dep qemu
+      - restore_cache:
+          keys:
+            - llvm-source-8-macos-v2
+      - run:
+          name: "Fetch LLVM source"
+          command: make llvm-source
+      - save_cache:
+          key: llvm-source-8-macos-v2
+          paths:
+            - llvm
+      - restore_cache:
+          keys:
+            - llvm-build-8-macos-v2
+      - run:
+          name: "Build LLVM"
+          command: |
+            if [ ! -f llvm-build/lib/liblldELF.a ]
+            then
+              # install dependencies
+              HOMEBREW_NO_AUTO_UPDATE=1 brew install cmake ninja
+              # build!
+              make llvm-build
+            fi
+      - save_cache:
+          key: llvm-build-8-macos-v2
+          paths:
+            llvm-build
+      - run:
+          name: "Create LLVM symlinks"
+          command: |
+            ln -s $PWD/llvm-build/bin/clang-8 /usr/local/bin/clang-8
+            ln -s $PWD/llvm-build/bin/llvm-ar /usr/local/bin/llvm-ar
+      - run:
+          name: "Install Go dependencies"
+          command: dep ensure --vendor-only
+      - run:
+          name: "Test TinyGo"
+          command: make static-test
+      - run:
+          name: "Build TinyGo release"
+          command: |
+            make release -j3
+            cp -p build/release.tar.gz /tmp/tinygo.darwin-amd64.tar.gz
+      - store_artifacts:
+          path: /tmp/tinygo.darwin-amd64.tar.gz
+      - run:
+          name: "Extract release tarball"
+          command: |
+            mkdir -p ~/lib
+            tar -C /usr/local/opt -xf /tmp/tinygo.darwin-amd64.tar.gz
+            ln -s /usr/local/opt/tinygo/bin/tinygo /usr/local/bin/tinygo
+            tinygo version
+      - smoketest-no-avr
 
 
 jobs:
@@ -195,12 +259,20 @@ jobs:
     steps:
       - test-linux:
           llvm: "-8"
-  build-release:
+  build-linux:
     docker:
       - image: circleci/golang:1.12
     working_directory: /go/src/github.com/tinygo-org/tinygo
     steps:
-      - build-release
+      - build-linux
+  build-macos:
+    macos:
+      xcode: "10.1.0"
+    working_directory: ~/go/src/github.com/tinygo-org/tinygo
+    steps:
+      - build-macos
+
+
 
 
 workflows:
@@ -208,4 +280,5 @@ workflows:
     jobs:
       - test-llvm8-go111
       - test-llvm8-go112
-      - build-release
+      - build-linux
+      - build-macos
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index acec65141..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-language: go
-
-matrix:
-  include:
-  - os: osx
-    go: "1.12"
-    env: PATH="/usr/local/opt/llvm/bin:$PATH"
-    before_install:
-    - mkdir -p /Users/travis/gopath/bin
-
-addons:
-  homebrew:
-    update: true
-    packages:
-    - llvm@8
-    - qemu
-
-install:
-  - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
-  - dep ensure --vendor-only
-
-script:
-  - go install github.com/tinygo-org/tinygo
-  - go test -v .
-  - make gen-device
-  - tinygo build -size short -o blinky1.nrf.elf    -target=pca10040     examples/blinky1
-  - tinygo build -size short -o blinky2.nrf.elf    -target=pca10040     examples/blinky2
-  - tinygo build             -o blinky2                                 examples/blinky2 # TODO: re-enable -size flag with MachO support
-  - tinygo build -size short -o test.nrf.elf       -target=pca10040     examples/test
-  - tinygo build -size short -o blinky1.nrf51.elf  -target=microbit     examples/echo
-  - tinygo build -size short -o test.nrf.elf       -target=nrf52840-mdk examples/blinky1
-  - tinygo build -size short -o blinky1.nrf51d.elf -target=pca10031     examples/blinky1
-  - tinygo build -size short -o blinky1.stm32.elf  -target=bluepill     examples/blinky1
-  - tinygo build -size short -o blinky1.reel.elf   -target=reelboard    examples/blinky1
-  - tinygo build -size short -o blinky2.reel.elf   -target=reelboard    examples/blinky2
-  - tinygo build -size short -o blinky1.pca10056.elf    -target=pca10056     examples/blinky1
-  - tinygo build -size short -o blinky2.pca10056.elf    -target=pca10056     examples/blinky2
-  - tinygo build -size short -o blinky1.samd21.elf    -target=itsybitsy-m0     examples/blinky1
-  - tinygo build             -o wasm.wasm          -target=wasm         examples/wasm
diff --git a/Makefile b/Makefile
index 3012a4be9..763f67c33 100644
--- a/Makefile
+++ b/Makefile
@@ -47,9 +47,15 @@ LLD_SRC ?= llvm/tools/lld
 
 LLVM_COMPONENTS = all-targets analysis asmparser asmprinter bitreader bitwriter codegen core coroutines debuginfodwarf executionengine instrumentation interpreter ipo irreader linker lto mc mcjit objcarcopts option profiledata scalaropts support target
 
-CLANG_LIBS = -Wl,--start-group $(abspath $(LLVM_BUILDDIR))/lib/libclang.a -lclangAnalysis -lclangARCMigrate -lclangAST -lclangASTMatchers -lclangBasic -lclangCodeGen -lclangCrossTU -lclangDriver -lclangDynamicASTMatchers -lclangEdit -lclangFormat -lclangFrontend -lclangFrontendTool -lclangHandleCXX -lclangHandleLLVM -lclangIndex -lclangLex -lclangParse -lclangRewrite -lclangRewriteFrontend -lclangSema -lclangSerialization -lclangStaticAnalyzerCheckers -lclangStaticAnalyzerCore -lclangStaticAnalyzerFrontend -lclangTooling -lclangToolingASTDiff -lclangToolingCore -lclangToolingInclusions -lclangToolingRefactor -Wl,--end-group -lstdc++
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),Linux)
+    START_GROUP = -Wl,--start-group
+    END_GROUP = -Wl,--end-group
+endif
+
+CLANG_LIBS = $(START_GROUP) $(abspath $(LLVM_BUILDDIR))/lib/libclang.a -lclangAnalysis -lclangARCMigrate -lclangAST -lclangASTMatchers -lclangBasic -lclangCodeGen -lclangCrossTU -lclangDriver -lclangDynamicASTMatchers -lclangEdit -lclangFormat -lclangFrontend -lclangFrontendTool -lclangHandleCXX -lclangHandleLLVM -lclangIndex -lclangLex -lclangParse -lclangRewrite -lclangRewriteFrontend -lclangSema -lclangSerialization -lclangStaticAnalyzerCheckers -lclangStaticAnalyzerCore -lclangStaticAnalyzerFrontend -lclangTooling -lclangToolingASTDiff -lclangToolingCore -lclangToolingInclusions -lclangToolingRefactor $(END_GROUP) -lstdc++
 
-LLD_LIBS = -Wl,--start-group -llldCOFF -llldCommon -llldCore -llldDriver -llldELF -llldMachO -llldMinGW -llldReaderWriter -llldWasm -llldYAML -Wl,--end-group
+LLD_LIBS = $(START_GROUP) -llldCOFF -llldCommon -llldCore -llldDriver -llldELF -llldMachO -llldMinGW -llldReaderWriter -llldWasm -llldYAML $(END_GROUP)
 
 
 # For static linking.
diff --git a/README.md b/README.md
index 6956a1c36..3327e7a39 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,5 @@
 # TinyGo - Go compiler for small places
 
-[![Travis CI](https://travis-ci.com/tinygo-org/tinygo.svg?branch=dev)](https://travis-ci.com/tinygo-org/tinygo)
 [![CircleCI](https://circleci.com/gh/tinygo-org/tinygo/tree/dev.svg?style=svg)](https://circleci.com/gh/tinygo-org/tinygo/tree/dev)
 
 TinyGo is a Go compiler intended for use in small places such as microcontrollers, WebAssembly (WASM), and command-line tools.