Add GitHub action for CI

.Rbuildignore

@@ -9,3 +9,4 @@
 ^appveyor\.yml$
 ^doc$
 ^Meta$
+^\.github$

.github/.gitignore

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

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

@@ -0,0 +1,50 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+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-latest,   r: 'devel', http-user-agent: 'release'}
+          - {os: ubuntu-latest,   r: 'release'}
+          - {os: ubuntu-latest,   r: 'oldrel-1'}
+
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+      R_KEEP_PKG_SOURCE: yes
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: r-lib/actions/setup-pandoc@v2
+
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: ${{ matrix.config.r }}
+          http-user-agent: ${{ matrix.config.http-user-agent }}
+          use-public-rspm: true
+
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          extra-packages: any::rcmdcheck
+          needs: check
+
+      - uses: r-lib/actions/check-r-package@v2
+        with:
+          upload-snapshots: true
+          build_args: 'c("--no-manual","--compact-vignettes=gs+qpdf")'

README.md

@@ -1,10 +1,15 @@
 # R/iprior: An R package for I-prior regression
 
-[![Build Status](https://travis-ci.org/haziqj/iprior.svg?branch=master)](https://travis-ci.org/haziqj/iprior)
+<!-- badges: start -->
+[![R-CMD-check](https://github.com/haziqj/iprior/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/haziqj/iprior/actions/workflows/R-CMD-check.yaml)
+<!-- [![Build Status](https://travis-ci.org/haziqj/iprior.svg?branch=master)](https://travis-ci.org/haziqj/iprior)
 [![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/haziqj/iprior?branch=master&svg=true)](https://ci.appveyor.com/project/haziqj/iprior)
-[![Coverage Status](https://img.shields.io/codecov/c/github/haziqj/iprior/master.svg)](https://codecov.io/gh/haziqj/iprior)
+[![Coverage Status](https://img.shields.io/codecov/c/github/haziqj/iprior/master.svg)](https://codecov.io/gh/haziqj/iprior) -->
 [![CRAN_Status_Badge_version_ago](http://www.r-pkg.org/badges/version-ago/iprior)](https://cran.r-project.org/package=iprior)
 [![CRAN downloads](http://cranlogs.r-pkg.org/badges/grand-total/iprior)](https://cran.r-project.org/package=iprior)
+<!-- badges: end -->
+
+
 
 Based on the manuscript entitled "Regression and Classification with I-priors" by Wicher Bergsma (2018, [arXiv:1707.00274](https://arxiv.org/abs/1707.00274)). 
 In a general regression setting, priors can be assigned to the regression function in a vector space framework, and the posterior estimate of the regression function obtained.