switching from Travis to GA

.Rbuildignore

@@ -9,3 +9,4 @@ examples
 cran-comments.md
 ^appveyor\.yml$
 ToDo.md
+^\.github$

.github/.gitignore

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

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

@@ -0,0 +1,49 @@
+# 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@v3
+
+      - 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

README.md

@@ -1,7 +1,9 @@
 SSDM: Stacked species distribution modelling
 ================
 
-[![Travis-CI Build Status](https://travis-ci.org/sylvainschmitt/SSDM.svg?branch=master)](https://travis-ci.org/sylvainschmitt/SSDM)[![CRAN](https://www.r-pkg.org/badges/version/SSDM)](https://CRAN.R-project.org/package=SSDM) [![Downloads](http://cranlogs.r-pkg.org/badges/SSDM?color=brightgreen)](http://www.r-pkg.org/pkg/SSDM) [![Coverage Status](https://img.shields.io/codecov/c/github/sylvainschmitt/SSDM/master.svg)](https://codecov.io/github/sylvainschmitt/SSDM?branch=master) [![Research software impact](http://depsy.org/api/package/cran/SSDM/badge.svg)](http://depsy.org/package/r/SSDM) [![Gitter](https://badges.gitter.im/S-SDM/community.svg)](https://gitter.im/S-SDM/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+[![R-CMD-check](https://github.com/sylvainschmitt/SSDM/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/sylvainschmitt/SSDM/actions/workflows/R-CMD-check.yaml)
+[![Downloads](http://cranlogs.r-pkg.org/badges/SSDM?color=brightgreen)](http://www.r-pkg.org/pkg/SSDM) 
+[![Coverage Status](https://img.shields.io/codecov/c/github/sylvainschmitt/SSDM/master.svg)](https://codecov.io/github/sylvainschmitt/SSDM?branch=master) [![Research software impact](http://depsy.org/api/package/cran/SSDM/badge.svg)](http://depsy.org/package/r/SSDM) [![Gitter](https://badges.gitter.im/S-SDM/community.svg)](https://gitter.im/S-SDM/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
 SSDM is a package to map species richness and endemism based on stacked species distribution models (SSDM). Individual SDMs can be created using a single or multiple algorithms (ensemble SDMs). For each species, an SDM can yield a habitat suitability map, a binary map, a between-algorithm variance map, and can assess variable importance, algorithm accuracy, and between-algorithm correlation. Methods to stack individual SDMs include summing individual probabilities and thresholding then summing. Thresholding can be based on a specific evaluation metric or by drawing repeatedly from a Bernouilli distribution. The SSDM package also provides a user-friendly interface `gui`.