adding Dockerfile for custom checks in Travis and beyond

Author: eddelbuettel

.Rbuildignore

@@ -19,3 +19,4 @@ inst/include/Rcpp.h.old
 LICENSE
 .*.tar.gz
 \.editorconfig
+docker

docker/Dockerfile

@@ -0,0 +1,25 @@
+## Emacs, make this -*- mode: sh; -*-
+
+FROM r-base:latest
+
+LABEL org.label-schema.license="GPL-2.0" \
+      org.label-schema.vcs-url="https://github.com/RcppCore/Rcpp" \
+      maintainer="Dirk Eddelbuettel <[email protected]>"
+
+RUN apt-get update \
+        && apt-get install -y --no-install-recommends \
+                r-cran-runit \
+                r-cran-inline \
+                r-cran-rmarkdown \
+                r-cran-knitr \
+                r-cran-pkgkitten \
+                r-cran-curl \
+                r-cran-openssl \
+                r-cran-httr \
+                r-cran-lazyeval \
+                r-cran-withr \
+        && install.r rbenchmark pinp covr \
+        && mkdir ~/.R \
+        && echo _R_CHECK_FORCE_SUGGESTS_=FALSE > ~/.R/check.Renviron
+
+CMD ["bash"]