Allow for app.R or server.R apps (#20)

R/export.R

@@ -35,8 +35,11 @@ export <- function(
   verbose_print <- if (verbose) message else list
 
   stopifnot(fs::is_dir(appdir))
-  if (!fs::file_exists(fs::path(appdir, "app.R"))) {
-    stop("Directory ", appdir, " does not contain an app.R file.")
+  if (!(
+    fs::file_exists(fs::path(appdir, "app.R")) ||
+      fs::file_exists(fs::path(appdir, "server.R"))
+  )) {
+    stop("Directory ", appdir, " does not contain an app.R or server.R file.")
   }
 
   if (fs::is_absolute_path(subdir)) {

local/shiny-apps/global-r/global.R

@@ -0,0 +1 @@
+global_value <- 50

local/shiny-apps/global-r/server.R

@@ -0,0 +1,8 @@
+library(shiny)
+
+
+function(input, output) {
+    output$txt <- renderText({
+        paste0("The value of n*2 is ", 2 * input$n)
+    })
+}

local/shiny-apps/global-r/ui.R

@@ -0,0 +1,5 @@
+fluidPage(
+  markdown("## `ui.R` / `server.R` / `global.R`"),
+  sliderInput("n", "N", 0, 100, global_value),
+  verbatimTextOutput("txt", placeholder = TRUE),
+)

tests/testthat/test-export.R

@@ -1,6 +1,4 @@
-
-
-test_that("export", {
+test_that("export - app.R", {
   maybe_skip_test()
 
   assets_ensure()
@@ -60,3 +58,65 @@ test_that("export", {
   )
   expect_setequal(dir(file.path(out_dir, "test_subdir", "edit")), asset_edit_files)
 })
+
+
+test_that("export - server.R", {
+  maybe_skip_test()
+
+  assets_ensure()
+
+  app_dir <- tempfile()
+  dir.create(app_dir, recursive = TRUE)
+  on.exit(unlink_path(app_dir), add = TRUE)
+  server_r <- file.path(app_dir, "server.R")
+  ui_r <- file.path(app_dir, "ui.R")
+  global_r <- file.path(app_dir, "global.R")
+
+  cat(
+    file = server_r,
+    collapse(c(
+      "library(shiny)",
+      "shinyServer(function(input, output, session) {",
+      "  output$txt <- renderText({",
+      "    paste0(\"The value of n*2 is \", 2 * input$n)",
+      "  })",
+      "})",
+      ""
+    ))
+  )
+  cat(
+    file = ui_r,
+    collapse(c(
+      "library(shiny)",
+      "shinyUI(fluidPage(",
+      "  sliderInput(\"n\", \"N\", 0, 100, 40),",
+      "  verbatimTextOutput(\"txt\", placeholder = TRUE),",
+      "))",
+      ""
+    ))
+  )
+  cat(
+    file = global_r,
+    collapse(c(
+      "library(shiny)",
+      "global_value <- 50",
+      ""
+    ))
+  )
+
+  # Create a temporary directory
+  out_dir <- file.path(tempfile(), "out")
+
+  # Verify global.R / ui.R / server.R app can be exported
+  expect_silent({
+    export(app_dir, out_dir)
+  })
+  # Verify global.R / ui.R / server.R exported files exist
+
+  app_json <- jsonlite::read_json(file.path(out_dir, "app.json"))
+  out_app_file_names <- vapply(app_json, `[[`, character(1), "name")
+  expect_setequal(
+    out_app_file_names,
+    c("global.R", "ui.R", "server.R")
+  )
+})