Export R themes without running function on package load

.Rbuildignore

@@ -20,7 +20,7 @@ demo/.*\.js
 demo/.*\.html
 demo/.*\.css
 
-# ignore python files/folders
+# ignore Python files/folders
 setup.py
 usage.py
 setup.py

R/themes.R

@@ -0,0 +1,31 @@
+.prependBootswatch <- function(suffix) {
+  BOOTSWATCH_BASE <- "https://stackpath.bootstrapcdn.com/bootswatch/4.5.0/"
+  return(paste(BOOTSWATCH_BASE, suffix, sep=""))
+}
+
+#' @export'
+dbcThemes <- list(
+  BOOTSTRAP = "https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css",
+  GRID = "https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap-grid.min.css",
+  CERULEAN = .prependBootswatch("cerulean/bootstrap.min.css"),
+  COSMO = .prependBootswatch("cosmo/bootstrap.min.css"),
+  CYBORG = .prependBootswatch("cyborg/bootstrap.min.css"),
+  DARKLY = .prependBootswatch("darkly/bootstrap.min.css"),
+  FLATLY = .prependBootswatch("flatly/bootstrap.min.css"),
+  JOURNAL = .prependBootswatch("journal/bootstrap.min.css"),
+  LITERA = .prependBootswatch("litera/bootstrap.min.css"),
+  LUMEN = .prependBootswatch("lumen/bootstrap.min.css"),
+  LUX = .prependBootswatch("lux/bootstrap.min.css"),
+  MATERIA = .prependBootswatch("materia/bootstrap.min.css"),
+  MINTY = .prependBootswatch("minty/bootstrap.min.css"),
+  PULSE = .prependBootswatch("pulse/bootstrap.min.css"),
+  SANDSTONE = .prependBootswatch("sandstone/bootstrap.min.css"),
+  SIMPLEX = .prependBootswatch("simplex/bootstrap.min.css"),
+  SKETCHY = .prependBootswatch("sketchy/bootstrap.min.css"),
+  SLATE = .prependBootswatch("slate/bootstrap.min.css"),
+  SOLAR = .prependBootswatch("solar/bootstrap.min.css"),
+  SPACELAB = .prependBootswatch("spacelab/bootstrap.min.css"),
+  SUPERHERO = .prependBootswatch("superhero/bootstrap.min.css"),
+  UNITED = .prependBootswatch("united/bootstrap.min.css"),
+  YETI = .prependBootswatch("yeti/bootstrap.min.css")
+)

gulpfile.js

@@ -2,6 +2,7 @@ const {dest, parallel, series, src} = require('gulp');
 const del = require('del');
 const mkdirp = require('mkdirp');
 const rename = require('gulp-rename');
+const footer = require('gulp-footer');
 
 function cleanLib() {
   mkdirp.sync('lib');
@@ -42,5 +43,16 @@ function copyGeneratedFiles() {
     .pipe(dest('dash_bootstrap_components/_components'));
 }
 
-exports.default = series(copyGeneratedFiles, cleanGeneratedFiles);
+function addThemesToRNamespace() {
+  return src('NAMESPACE')
+    .pipe(footer('export(dbcThemes)'))
+    .pipe(dest('.', {overwrite: true}));
+}
+
+exports.postPyBuild = series(copyGeneratedFiles, cleanGeneratedFiles);
 exports.clean = parallel(cleanGeneratedFiles, cleanComponents, cleanLib);
+exports.postRBuild = series(
+  copyGeneratedFiles,
+  cleanGeneratedFiles,
+  addThemesToRNamespace
+);

package.json

@@ -8,8 +8,8 @@
     "build": "run-s clean build:js build:py build:r",
     "build:lib": "webpack --config=webpack/config.lib.js",
     "build:js": "NODE_ENV=production webpack --config=webpack/config.dist.js",
-    "build:py": "dash-generate-components ./src/components dash_bootstrap_components && gulp",
-    "build:r": "dash-generate-components ./src/components dash_bootstrap_components --r-prefix 'dbc' && gulp",
+    "build:py": "dash-generate-components ./src/components dash_bootstrap_components && gulp postPyBuild",
+    "build:r": "dash-generate-components ./src/components dash_bootstrap_components --r-prefix 'dbc' && gulp postRBuild",
     "clean": "gulp clean",
     "demo": "webpack-dev-server --hot --inline --port=8888 --config=webpack/config.demo.js",
     "format": "prettier src/**/*.js --write",
@@ -46,6 +46,7 @@
     "css-loader": "^1.0.1",
     "del": "^5.1.0",
     "gulp": "^4.0.2",
+    "gulp-footer": "^2.0.2",
     "gulp-rename": "^2.0.0",
     "jest": "^24.9.0",
     "mkdirp": "^0.5.4",