anchor.diff:     https://mirrors.nics.utk.edu/cran/src/contrib/git2r_0.23.0.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/devtools_1.13.6.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/R6_2.2.2.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/mime_0.5.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/httr_1.3.1.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/RCurl_1.95-4.11.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/BH_1.66.0-1.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/xml2_1.2.0.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/curl_3.2.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/jsonlite_1.5.tar.gz \
  -   https://mirrors.nics.utk.edu/cran/src/contrib/digest_0.6.16.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/downloader_0.4.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/memoise_1.1.0.tar.gz \
      https://mirrors.nics.utk.edu/cran/src/contrib/plyr_1.8.4.tar.gz \
  
positive.code: 
  # update the R packages we will need for knitr
  RUN DEBIAN_FRONTEND=noninteractive wget \
     https://mirrors.nics.utk.edu/cran/src/contrib/knitr_1.20.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/yaml_2.2.0.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/Rcpp_0.12.18.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/htmltools_0.3.6.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/caTools_1.17.1.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/bitops_1.0-6.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/digest_0.6.16.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/glue_1.3.0.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/stringr_1.3.1.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/markdown_0.8.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/highr_0.7.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/formatR_1.5.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/evaluate_0.11.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/mime_0.5.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/stringi_1.2.4.tar.gz \
     https://mirrors.nics.utk.edu/cran/src/contrib/magrittr_1.5.tar.gz
  
  
  RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
     bitops_1.0-6.tar.gz \
     caTools_1.17.1.1.tar.gz \
     digest_0.6.16.tar.gz \
     Rcpp_0.12.18.tar.gz \
     htmltools_0.3.6.tar.gz \
     yaml_2.2.0.tar.gz \
     stringi_1.2.4.tar.gz \
     magrittr_1.5.tar.gz \
     mime_0.5.tar.gz \
     glue_1.3.0.tar.gz \
     stringr_1.3.1.tar.gz \
     highr_0.7.tar.gz \
     formatR_1.5.tar.gz \
     evaluate_0.11.tar.gz \
     markdown_0.8.tar.gz \
     knitr_1.20.tar.gz
   
  
  RUN rm \
     evaluate_0.11.tar.gz \
     formatR_1.5.tar.gz \
     highr_0.7.tar.gz \
     markdown_0.8.tar.gz \
     stringi_1.2.4.tar.gz \
     magrittr_1.5.tar.gz \
     glue_1.3.0.tar.gz \
     stringr_1.3.1.tar.gz \
     knitr_1.20.tar.gz \
     yaml_2.2.0.tar.gz \
     Rcpp_0.12.18.tar.gz \
     htmltools_0.3.6.tar.gz \
     caTools_1.17.1.1.tar.gz \
     bitops_1.0-6.tar.gz \
     digest_0.6.16.tar.gz \
     mime_0.5.tar.gz
  
  # dependency for R XML library
  RUN apt-get update 
  
negative.code: 
  RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
     jsonlite_1.5.tar.gz \
     memoise_1.1.0.tar.gz \
     whisker_0.3-2.tar.gz \
     bitops_1.0-6.tar.gz \
  