[infer][PR] feat: replace Travis with Github actions

Summary:
Closes https://github.com/facebook/infer/issues/1270

Attempt to switch from Travis to Github Actions.

Please see [CONTRIBUTING.md](./CONTRIBUTING.md) for how to set up your development environment and run tests.
Pull Request resolved: https://github.com/facebook/infer/pull/1271

Reviewed By: mityal

Differential Revision: D21881443

Pulled By: jvillard

fbshipit-source-id: f711bbf27

.github/workflows/install.yml

@@ -0,0 +1,52 @@
+name: Install
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-latest
+          - ubuntu-latest
+        ocaml-version:
+          - 4.09.1
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      - name: Use OCaml ${{ matrix.ocaml-version }}
+        uses: avsm/setup-ocaml@v1
+        with:
+          ocaml-version: ${{ matrix.ocaml-version }}
+
+      - name: Restore opam cache
+        uses: actions/cache@v2
+        with:
+          path: ${HOME}/.opam
+          key: ${{ runner.os }}-${{ hashFiles('opam.locked') }}
+
+      - name: Install Required Brew Packages for MacOS
+        run: brew install pkg-config automake
+        if: runner.os == 'macOS'
+
+      # ensure infer isn't installed in this switch, then deal with dependencies
+      - run: opam remove infer || true
+
+      - run: opam update --upgrade
+
+      - run: opam pin add --no-action infer .
+
+      - run: opam depext --update infer;
+
+      - run: opam install --deps-only infer
+
+      - run: opam install infer

.travis.yml

@@ -1,48 +0,0 @@
-language: c
-env:
-  - OCAML_VERSION=4.09.1 OPAM_VERSION=2.0.7
-cache:
-  directories:
-    - ${HOME}/.opam
-    - facebook-clang-plugins
-addons:
-  apt:
-    packages:
-    - libmpfr-dev
-  homebrew:
-    packages:
-      - aspcud
-      - automake
-      - gmp
-      - libtool
-      - lzlib
-      - mpfr
-      - pkg-config
-      - sqlite
-before_install:
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then ARCH="macos"; else ARCH="linux"; fi
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then export PATH="/usr/bin:${PATH}"; fi
-  - wget -O ${HOME}/opam https://github.com/ocaml/opam/releases/download/${OPAM_VERSION}/opam-${OPAM_VERSION}-x86_64-${ARCH}
-  - chmod +x ${HOME}/opam
-  - export PATH=${HOME}:${PATH}
-  - export OPAMYES=1
-  - export OPAMJOBS=2
-  - export INFER_OPAM_SWITCH="ocaml-variants.${OCAML_VERSION}+flambda"
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then export OPAMEXTERNALSOLVER=$(which aspcud); fi
-  - opam init --compiler=${OCAML_VERSION} --disable-sandboxing
-  - eval $(opam env)
-  - export OPAMVERBOSE=1
-install:
-  # ensure infer isn't installed in this switch, then deal with dependencies
-  - opam remove infer || true
-  - opam update --upgrade
-  - opam pin add --no-action infer .
-  - if [ "$TRAVIS_OS_NAME" != "osx" ]; then opam depext --update infer; fi
-  - opam install --deps-only infer
-script:
-  - opam install infer
-before_cache:
-  - opam remove infer || true
-os:
-- linux
-- osx