How can I import from multiple files in r-drake?

I want to import data of a similar category from multiple source files.

Every source has a short label.

How can I incorporate this into drake, without writing out every file as its own target?

I thought the following would work, but it does not. Ideally, I would like to have the targets raw_a and raw_b.

input_files <- list(
  'a' = 'file_1.csv',
  'b' = 'file_2.csv'
)

plan <-
  drake::drake_plan(
    raw = drake::target(
      import_file(file),
      transform = map(
        file = file_in(!! input_files)
      )
    )
  )

with

import_file <- function(file) {
  readr::read_csv(file, skip = 2)
}

You are so close. file_in() needs to go literally in the command, not the transformation.

library(drake)
input_files <- c("file_1.csv", "file_2.csv")

plan <- drake_plan(
  raw = target(
    import_file(file_in(file)),
    transform = map(file = !!input_files)
  )
)

config <- drake_config(plan)
vis_drake_graph(config)

^{Created on 2019-10-19 by the reprex package (v0.3.0)}