Building_Packages.R
In fakemake: Mock the Unix Make Utility

pkg_path <- file.path(tempdir(), "fakepack")
unlink(pkg_path, force = TRUE, recursive = TRUE)
usethis::create_package(pkg_path)

file.copy(system.file("templates", "throw.R", package = "fakemake"),
          file.path(pkg_path, "R"))

ml <-  fakemake::provide_make_list("vignette")

withr::with_dir(pkg_path, fakemake::visualize(ml))

withr::with_dir(pkg_path, fakemake::visualize(ml, root = "log/check.Rout"))

index <- which(sapply(ml, function(x) x["alias"] == "build"))
ml[[index]]

index <- which(sapply(ml, function(x) x["alias"] == "roxygen2"))
ml[[index]][["prerequisites"]]

withr::with_dir(pkg_path, print(fakemake::make("check", ml)))


if ("fakepack" %in% .packages()) detach("package:fakepack", unload = TRUE)


list.files(file.path(pkg_path, "log"))

cat(readLines(file.path(pkg_path, "log", "check.Rout")), sep = "\n")

system.time(suppressMessages(withr::with_dir(pkg_path,
                                             print(fakemake::make("check",
                                                                  ml)))))

cat(readLines(file.path(pkg_path, "log", "covr.Rout")), sep = "\n")

dir.create(file.path(pkg_path, "tests", "testthat"), recursive = TRUE)
file.copy(system.file("templates", "testthat.R", package = "fakemake"),
          file.path(pkg_path, "tests"))
file.copy(system.file("templates", "test-throw.R", package = "fakemake"),
          file.path(pkg_path, "tests", "testthat"))


withr::with_dir(pkg_path, fakemake::visualize(ml))

withr::with_dir(pkg_path, print(fakemake::make("build", ml)))

cat(readLines(file.path(pkg_path, "log", "covr.Rout")), sep = "\n")