Add a COPY instruction to a dockerfile

Adds a COPY instruction to copy files or directories from the build context to the container's filesystem.

Usage

dfi_copy(dockerfile, src, dest, from = NULL)

Arguments

dockerfile

A dockerfile object

src

Source path (relative to build context)

dest

Destination path (in the container)

from

Build stage to copy from (optional, for multi-stage builds)

Value

An updated dockerfile object with the COPY instruction added

Details

The COPY instruction copies new files or directories from src and adds them to the filesystem of the container at the path dest. When used with the from parameter, it can copy files from previous build stages in multi-stage builds.

See also

dfi_add() for similar functionality with additional features (like URL support), dfi_workdir() for setting the working directory, & Official Docker COPY documentation

Other dockerfile instruction functions: dfi_add(), dfi_arg(), dfi_cmd(), dfi_entrypoint(), dfi_env(), dfi_expose(), dfi_from(), dfi_healthcheck(), dfi_label(), dfi_maintainer(), dfi_onbuild(), dfi_run(), dfi_shell(), dfi_stopsignal(), dfi_user(), dfi_volume(), dfi_workdir()

Examples

# Copy a single file
df <- dockerfile() |>
  dfi_from("rocker/r-ver:4.4.0") |>
  dfi_copy("script.R", "/app/script.R")

# Copy from a previous build stage
df <- dockerfile() |>
  dfi_from("rocker/r-ver:4.4.0", as = "build") |>
  dfi_run("R -e \"install.packages('renv')\"") |>
  dfi_from("rocker/r-ver:4.4.0", as = "final") |>
  dfi_copy("/usr/local/lib/R/site-library/renv", 
          "/usr/local/lib/R/site-library/renv", 
          from = "build")