more work to get esbuild up

src/Config.hs

@@ -1,8 +1,14 @@
 module Config where
 
-outputDir :: String
+import Development.Shake.FilePath (addExtension, (</>))
+
+outputDir :: FilePath
 outputDir = "publish"
 
+-- build artifacts go here
+buildDir :: FilePath
+buildDir = ".psb"
+
 assetGlobs :: [String]
 assetGlobs = ["static//*", "robots.txt", "favicon.ico"]
 
@@ -13,6 +19,9 @@ resourceGlobs = jsGlobs ++ cssGlobs
 prependResources :: (Functor m) => m String -> m String
 prependResources = fmap ("resources/" ++)
 
+resourceHashPath :: FilePath -> FilePath
+resourceHashPath input = outputDir </> addExtension input ".hash"
+
 jsGlobs :: [String]
 jsGlobs = prependResources $ liftA2 (++) ["js//*."] ["js", "mjs"]
 

src/Psb/Main.hs

@@ -58,7 +58,8 @@ buildSite = do
   Shake.need $ map (outputDir </>) assetPaths
 
   -- handle js, css and anything else we want to process before moving
-  Shake.need <$> Shake.getDirectoryFiles "" resourceGlobs
+  resourcePaths <- Shake.getDirectoryFiles "resources/" resourceGlobs
+  Shake.need $ map resourceHashPath resourcePaths
 
   -- take the misc pages which aren't blog posts and make their html files
   Shake.need $ map indexHtmlOutputPath pagePaths

src/Utilities/Bundling.hs

@@ -1,13 +1,29 @@
+{-# LANGUAGE DeriveAnyClass #-}
+{-# LANGUAGE TypeFamilies #-}
+
 module Utilities.Bundling
   ( bundled,
   )
 where
 
-import Development.Shake (Action, Rules, command_)
+import Config (buildDir, cssGlobs, jsGlobs, outputDir)
+import Development.Shake (Action, RuleResult, Rules, addOracle, cmd_, command_, getDirectoryFiles, need, (%>))
+import Development.Shake.Classes
+import Development.Shake.FilePath ((</>))
+import GHC.Generics (Generic)
 
 -- does not include specification of output location or input files
 generic_esbuild_options :: [String]
-generic_esbuild_options = ["--minify", "--sourcemap", "--bundle", "--chunk-names=[name]-[hash]"]
+generic_esbuild_options = ["--minify", "--sourcemap", "--bundle", "--chunk-names=[name]-[hash]", "--entry-names=[name]-[hash]"]
+
+data BuildOracleVariant = CSS | Javascript deriving (Show, Typeable, Eq, Generic, Hashable, Binary, NFData)
+
+type BuildOutputs = [FilePath]
+
+type instance RuleResult BuildOracleVariant = BuildOutputs
+
+resource_dir :: FilePath
+resource_dir = outputDir </> "resources"
 
 -- TODO: not sure if I want all bundling to be an all at once afair, per file format
 -- or multiple stages for various formats
@@ -16,5 +32,51 @@ generic_esbuild_options = ["--minify", "--sourcemap", "--bundle", "--chunk-names
 -- indicate completion/fulfill a need directive without rebuilding even when files
 -- are left unchanged, maybe have the need be a $(filename).hash which we compute
 -- ourselves based on the unminified input
-bundled :: Rules ()
+bundled :: Rules (BuildOracleVariant -> Action BuildOutputs)
-bundled = error "TODO"
+bundled = addOracle $ \q -> case q of
+  CSS -> bundle_css
+  Javascript -> bundle_scripts
+
+css_dir :: FilePath
+css_dir = resource_dir </> "css"
+
+css_meta_file :: FilePath
+css_meta_file = buildDir </> "esbuild-css-meta.json"
+
+css_esbuild_options :: [String]
+css_esbuild_options =
+  [ "--outdir=" ++ css_dir,
+    "--loader:.png=file",
+    "--loader:.woff2=file",
+    "--loader:.svg=file",
+    "--metafile=" ++ css_meta_file
+  ]
+
+-- need to take an input of resouces/blah.css
+-- and in addition to bundling it
+bundle_css :: Action BuildOutputs
+bundle_css = do
+  need cssGlobs
+  css_files <- getDirectoryFiles "" cssGlobs
+  cmd_ "esbuild" (generic_esbuild_options ++ css_esbuild_options ++ css_files)
+  pure $ error "TODO: pull the list of files from the meta file"
+
+-- Javascript and typescript
+-- potentially:
+-- "--target=es2020"
+-- , "--format=esm"
+js_esbuild_options :: [String]
+js_esbuild_options = ["--outdir=" ++ js_dir, "--splitting", "--metafile=" ++ js_meta_file]
+
+js_meta_file :: FilePath
+js_meta_file = buildDir </> "esbuild-js-meta.json"
+
+js_dir :: FilePath
+js_dir = resource_dir </> "js"
+
+bundle_scripts :: Action BuildOutputs
+bundle_scripts = do
+  need jsGlobs
+  js_files <- getDirectoryFiles "" cssGlobs
+  cmd_ "esbuild" (generic_esbuild_options ++ js_esbuild_options ++ js_files)
+  pure $ error "TODO: pull the list of files from the meta file"