added github action via usethis

.Rbuildignore

@@ -16,3 +16,4 @@ Makefile
 misc
 cran-comments.md
 ^CRAN-SUBMISSION$
+^\.github$

.github/.gitignore

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

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

@@ -0,0 +1,29 @@
+# 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: ubuntu-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+      R_KEEP_PKG_SOURCE: yes
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          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

README.Rmd

@@ -1,5 +1,6 @@
 ---
 title: "Read Me"
+output: md_document
 ---
 
 semtree
@@ -15,7 +16,10 @@ knitr::opts_chunk$set(
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.1116294.svg)](https://doi.org/10.5281/zenodo.1116294)
 [![cran version](http://www.r-pkg.org/badges/version/semtree)](https://cran.r-project.org/package=semtree)
 [![rstudio mirror downloads](http://cranlogs.r-pkg.org/badges/semtree)](https://github.com/r-hub/cranlogs.app)
-[![Build Status](https://travis-ci.com/brandmaier/semtree.svg?branch=master)](https://travis-ci.com/brandmaier/semtree)
+<!-- badges: start -->
+[![R-CMD-check](https://github.com/brandmaier/semtree/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/brandmaier/semtree/actions/workflows/R-CMD-check.yaml)
+<!-- badges: end -->
+
 ![Code size](https://img.shields.io/github/languages/code-size/brandmaier/semtree.svg)
 ![contributions](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)
 [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)

README.md

@@ -5,8 +5,10 @@
 version](http://www.r-pkg.org/badges/version/semtree)](https://cran.r-project.org/package=semtree)
 [![rstudio mirror
 downloads](http://cranlogs.r-pkg.org/badges/semtree)](https://github.com/r-hub/cranlogs.app)
-[![Build
-Status](https://travis-ci.com/brandmaier/semtree.svg?branch=master)](https://travis-ci.com/brandmaier/semtree)
+<!-- badges: start -->
+[![R-CMD-check](https://github.com/brandmaier/semtree/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/brandmaier/semtree/actions/workflows/R-CMD-check.yaml)
+<!-- badges: end -->
+
 ![Code
 size](https://img.shields.io/github/languages/code-size/brandmaier/semtree.svg)
 ![contributions](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)