{dockerfiler}

The goal of {dockerfiler} is to provide an easy way to create Dockerfiles from R.

About

You’re reading the doc about version :

desc::desc_get_version()
#> [1] '0.2.1'

The check results are:

devtools::check(quiet = TRUE)
#> ℹ Loading dockerfiler
#> ── R CMD check results ────────────────────────────────── dockerfiler 0.2.1 ────
#> Duration: 48.4s
#> 
#> 0 errors ✔ | 0 warnings ✔ | 0 notes ✔

Installation

You can install dockerfiler from GitHub with:

# install.packages("remotes")
remotes::install_github("ThinkR-open/dockerfiler")

Or from CRAN with :

install.packages("dockerfiler")

Basic worflow

By default, Dockerfiles are created with FROM "rocker/r-base".

You can set another FROM in new()

library(dockerfiler)
# Create a dockerfile template
my_dock <- Dockerfile$new()
my_dock$MAINTAINER("Colin FAY", "contact@colinfay.me")

Wrap your raw R Code inside the r() function to turn it into a bash command with R -e.

my_dock$RUN(r(install.packages("attempt", repo = "http://cran.irsn.fr/")))

Classical Docker stuffs:

my_dock$RUN("mkdir /usr/scripts")
my_dock$RUN("cd /usr/scripts")
my_dock$COPY("plumberfile.R", "/usr/scripts/plumber.R")
my_dock$COPY("torun.R", "/usr/scripts/torun.R")
my_dock$EXPOSE(8000)
my_dock$CMD("Rscript /usr/scripts/torun.R ")

See your Dockerfile :

my_dock

If you’ve made a mistake in your script, you can switch lines with the switch_cmd method. This function takes as arguments the positions of the two cmd you want to switch :

# Switch line 8 and 7
my_dock$switch_cmd(8, 7)
my_dock

You can also remove a cmd with remove_cmd:

my_dock$remove_cmd(8)
my_dock

This also works with a vector:

my_dock$remove_cmd(5:7)
my_dock

add_after add a command after a given line.

my_dock$add_after(
  cmd = "RUN R -e 'remotes::install_cran(\"rlang\")'",
  after = 3
)

Save your Dockerfile:

my_dock$write()

Create a Dockerfile from a DESCRIPTION

You can use a DESCRIPTION file to create a Dockerfile that installs the dependencies and the package.

my_dock <- dock_from_desc("DESCRIPTION")
my_dock

my_dock$CMD(r(library(dockerfiler)))

my_dock$add_after(
  cmd = "RUN R -e 'remotes::install_cran(\"rlang\")'",
  after = 3
)
my_dock

Create a Dockerfile from renv.lock

• Create renv.lock

dir_build <- tempfile(pattern = "renv")
dir.create(dir_build)

# Create a lockfile
the_lockfile <- file.path(dir_build, "renv.lock")
custom_packages <- c(
  # attachment::att_from_description(),
  "renv",
  "cli",
  "glue",
  "golem",
  "shiny",
  "stats",
  "utils",
  "testthat",
  "knitr"
)
renv::snapshot(
  packages = custom_packages,
  lockfile = the_lockfile,
  prompt = FALSE
)

• Build Dockerfile

my_dock <- dock_from_renv(
  lockfile = the_lockfile,
  distro = "focal",
  FROM = "rocker/verse"
)
my_dock

Contact

Questions and feedbacks welcome!

You want to contribute ? Open a PR :) If you encounter a bug or want to suggest an enhancement, please open an issue.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.