use GHA for CI

Author: kevinushey

.Rbuildignore

@@ -14,3 +14,4 @@
 ^tests/testthat/pkg/RcppParallelTest/src/.*\.dll$
 ^tests/testthat/pkg/RcppParallelTest/src/.*\.s?o$
 
+^\.github$

.github/.gitignore

@@ -0,0 +1 @@
+*.html

.github/workflows/R-CMD-check.yaml

@@ -0,0 +1,100 @@
+# NOTE: This workflow is overkill for most R packages
+# check-standard.yaml is likely a better choice
+# usethis::use_github_action("check-standard") will install it.
+#
+# For help debugging build failures open an issue on the RStudio community with the 'github-actions' tag.
+# https://community.rstudio.com/new-topic?category=Package%20development&tags=github-actions
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+    branches:
+      - main
+      - master
+
+name: R-CMD-check
+
+jobs:
+  R-CMD-check:
+    runs-on: ${{ matrix.config.os }}
+
+    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - {os: macOS-latest,   r: 'release'}
+          - {os: windows-latest, r: 'release'}
+          - {os: ubuntu-18.04,   r: 'devel', rspm: "https://packagemanager.rstudio.com/cran/__linux__/bionic/latest", http-user-agent: "R/4.0.0 (ubuntu-18.04) R (4.0.0 x86_64-pc-linux-gnu x86_64 linux-gnu) on GitHub Actions" }
+          - {os: ubuntu-18.04,   r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/bionic/latest"}
+
+    env:
+      RSPM: ${{ matrix.config.rspm }}
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: r-lib/actions/setup-r@v1
+        id: install-r
+        with:
+          r-version: ${{ matrix.config.r }}
+          http-user-agent: ${{ matrix.config.http-user-agent }}
+
+      - uses: r-lib/actions/setup-pandoc@v1
+
+      - name: Install pak and query dependencies
+        run: |
+          install.packages("pak", repos = "https://r-lib.github.io/p/pak/dev/")
+          saveRDS(pak::pkg_deps("local::.", dependencies = TRUE), ".github/r-depends.rds")
+        shell: Rscript {0}
+
+      - name: Restore R package cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ env.R_LIBS_USER }}
+          key: ${{ matrix.config.os }}-${{ steps.install-r.outputs.installed-r-version }}-1-${{ hashFiles('.github/r-depends.rds') }}
+          restore-keys: ${{ matrix.config.os }}-${{ steps.install-r.outputs.installed-r-version }}-1-
+
+      - name: Install system dependencies
+        if: runner.os == 'Linux'
+        run: |
+          pak::local_system_requirements(execute = TRUE)
+          pak::pkg_system_requirements("rcmdcheck", execute = TRUE)
+        shell: Rscript {0}
+
+      - name: Install dependencies
+        run: |
+          pak::local_install_dev_deps(upgrade = TRUE)
+          pak::pkg_install("rcmdcheck")
+        shell: Rscript {0}
+
+      - name: Session info
+        run: |
+          options(width = 100)
+          pkgs <- installed.packages()[, "Package"]
+          sessioninfo::session_info(pkgs, include_base = TRUE)
+        shell: Rscript {0}
+
+      - name: Check
+        env:
+          _R_CHECK_CRAN_INCOMING_: false
+        run: |
+          options(crayon.enabled = TRUE)
+          rcmdcheck::rcmdcheck(args = c("--no-manual", "--as-cran"), error_on = "warning", check_dir = "check")
+        shell: Rscript {0}
+
+      - name: Show testthat output
+        if: always()
+        run: find check -name 'testthat.Rout*' -exec cat '{}' \; || true
+        shell: bash
+
+      - name: Upload check results
+        if: failure()
+        uses: actions/upload-artifact@main
+        with:
+          name: ${{ matrix.config.os }}-r${{ matrix.config.r }}-results
+          path: check

.travis.yml

@@ -1,8 +1,9 @@
 ## RcppParallel Package
 
-[![Travis-CI Build Status](https://travis-ci.org/RcppCore/RcppParallel.svg?branch=master)](https://travis-ci.org/RcppCore/RcppParallel)
-[![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/RcppCore/RcppParallel?branch=master&svg=true)](https://ci.appveyor.com/project/RcppCore/RcppParallel)
+<!-- badges: start -->
+[![R-CMD-check](https://github.com/RcppCore/RcppParallel/workflows/R-CMD-check/badge.svg)](https://github.com/RcppCore/RcppParallel/actions)
 [![CRAN_Status_Badge](http://www.r-pkg.org/badges/version/RcppParallel)](https://cran.r-project.org/package=RcppParallel)
+<!-- badges: end -->
 
 High level functions for doing parallel programming with Rcpp. For example, the `parallelFor` function can be used to convert the work of a standard serial "for" loop into a parallel one and the `parallelReduce` function can be used for accumulating aggregate or other values.