Remove playground dependency to cdn hosted VERSIONS file

We will now track the actual playground versions within the bundle to prevent
all kinds of caching errors and make it easier to understand.

Author: ryyppy

common/CompilerManagerHook.js

@@ -36,9 +36,9 @@ module LoadScript = {
 }
 
 module CdnMeta = {
-  // Splits and sanitizes the content of the VERSIONS file
-  let parseVersions = (versions: string) =>
-    Js.String2.split(versions, "\n")->Js.Array2.filter(v => v !== "")
+  // Make sure versions exist on https://cdn.rescript-lang.org
+  // [0] = latest
+  let versions = ["v8.4.2", "v8.3.0-dev.2"]
 
   let getCompilerUrl = (version: string): string =>
     j`https://cdn.rescript-lang.org/$version/compiler.js`
@@ -291,67 +291,48 @@ let useCompilerManager = (~initialLang: Lang.t=Res, ~onAction: option<action =>
     | Init =>
       let libraries = ["reason-react"]
 
-      let completed = res => {
-        open SimpleRequest
-        switch res {
-        | Ok({text}) =>
-          switch CdnMeta.parseVersions(text) {
-          | [] => dispatchError(SetupError(j`No compiler versions found`))
-          | versions =>
-            // Fetching the initial compiler is different, since we
-            // don't have any running version downloaded yet
+      switch CdnMeta.versions {
+      | [] => dispatchError(SetupError(j`No compiler versions found`))
+      | versions =>
+        let latest = versions[0]
 
-            let latest = versions[0]
-
-            attachCompilerAndLibraries(~version=latest, ~libraries, ())->Promise.get(result =>
-              switch result {
-              | Ok() =>
-                let instance = Compiler.make()
-                let apiVersion = apiVersion->Version.fromString
-                let config = instance->Compiler.getConfig
-
-                let selected = {
-                  id: latest,
-                  apiVersion: apiVersion,
-                  compilerVersion: instance->Compiler.version,
-                  ocamlVersion: instance->Compiler.ocamlVersion,
-                  reasonVersion: instance->Compiler.reasonVersion,
-                  config: config,
-                  libraries: libraries,
-                  instance: instance,
-                }
+        attachCompilerAndLibraries(~version=latest, ~libraries, ())->Promise.get(result =>
+          switch result {
+          | Ok() =>
+            let instance = Compiler.make()
+            let apiVersion = apiVersion->Version.fromString
+            let config = instance->Compiler.getConfig
+
+            let selected = {
+              id: latest,
+              apiVersion: apiVersion,
+              compilerVersion: instance->Compiler.version,
+              ocamlVersion: instance->Compiler.ocamlVersion,
+              reasonVersion: instance->Compiler.reasonVersion,
+              config: config,
+              libraries: libraries,
+              instance: instance,
+            }
 
-                let targetLang =
-                  Version.availableLanguages(apiVersion)
-                  ->Js.Array2.find(l => l === initialLang)
-                  ->Belt.Option.getWithDefault(Version.defaultTargetLang(apiVersion))
-
-                setState(_ => Ready({
-                  selected: selected,
-                  targetLang: targetLang,
-                  versions: versions,
-                  errors: [],
-                  result: FinalResult.Nothing,
-                }))
-              | Error(errs) =>
-                let msg = Js.Array2.joinWith(errs, "; ")
-
-                dispatchError(CompilerLoadingError(msg))
-              }
-            )
+            let targetLang =
+              Version.availableLanguages(apiVersion)
+              ->Js.Array2.find(l => l === initialLang)
+              ->Belt.Option.getWithDefault(Version.defaultTargetLang(apiVersion))
+
+            setState(_ => Ready({
+              selected: selected,
+              targetLang: targetLang,
+              versions: versions,
+              errors: [],
+              result: FinalResult.Nothing,
+            }))
+          | Error(errs) =>
+            let msg = Js.Array2.joinWith(errs, "; ")
+
+            dispatchError(CompilerLoadingError(msg))
           }
-        | Error({text, status}) =>
-          dispatchError(SetupError(j`Error occurred: $text (status-code: $status)`))
-        }
-        ()
+        )
       }
-
-      open SimpleRequest
-      make(
-        ~contentType=Plain,
-        ~completed,
-        "https://cdn.rescript-lang.org/VERSIONS",
-      )->send
     | SwitchingCompiler(ready, version, libraries) =>
       attachCompilerAndLibraries(~version, ~libraries, ())->Promise.get(result =>
         switch result {