Decouple compiler versions for testing with the actual rescript installation

Author: ryyppy

compilers/README.md

@@ -0,0 +1,5 @@
+# compilers
+
+This folder is needed to install additional rescript compiler versions for testing our documented source code on multiple compiler versions.
+
+Our `scripts/test-examples.js` script will automatically install all package.json dependencies if it cannot find any compiler versions.

compilers/package-lock.json

@@ -0,0 +1,10 @@
+{
+  "name": "compilers",
+  "private": true,
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "dependencies": {
+    "rescript-820": "npm:bs-platform@8.2.0"
+  }
+}

compilers/package.json

@@ -29,7 +29,6 @@
     "react-dom": "^16.12.0",
     "reason-promise": "^1.0.2",
     "reason-react": "^0.9.1",
-    "rescript-820": "npm:bs-platform@^8.2.0",
     "remark-parse": "^7.0.1",
     "remark-slug": "^5.1.2",
     "remark-stringify": "^7.0.3",

package.json

@@ -8,7 +8,16 @@ let tempFileNameRegex = /_tempFile\.res/g
 
 // TODO: In the future we need to use the appropriate rescript version for each doc version variant
 //       see the package.json on how to define another rescript version
-let bsc = path.join(__dirname, '..', 'node_modules', 'rescript-820', process.platform, 'bsc.exe')
+let compilersDir = path.join(__dirname, "..", "compilers")
+let bsc = path.join(compilersDir, 'node_modules', 'rescript-820', process.platform, 'bsc.exe')
+
+const prepareCompilers = () => {
+  if (fs.existsSync(bsc)) {
+    return;
+  }
+  console.log("compilers not installed. Installing compilers...");
+  child_process.execFileSync("npm", ['install'], {cwd: compilersDir})
+}
 
 let parseFile = content => {
   if (!/```res (example|prelude|sig)/.test(content)) {
@@ -53,6 +62,10 @@ let postprocessOutput = (file, error) => {
     })
 }
 
+
+prepareCompilers();
+
+console.log("Running tests...")
 fs.writeFileSync(tempFileName, '')
 
 let success = true

scripts/test-examples.js

@@ -6853,11 +6853,6 @@ require-main-filename@^2.0.0:
   resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-2.0.0.tgz#d0b329ecc7cc0f61649f62215be69af54aa8989b"
   integrity sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==
 
-"rescript-820@npm:bs-platform@^8.2.0":
-  version "8.3.2"
-  resolved "https://registry.yarnpkg.com/bs-platform/-/bs-platform-8.3.2.tgz#c307f1cc2d2397c3d088c7f3b62e9f493283cdcf"
-  integrity sha512-iOTi5JIlNPoCPq31NS9ET79FLyCpwTL2JZbgHz35LzY9Bch1iDtbBR3FVGhRbjphxelAP4fLlFONfUNp5Y3a5g==
-
 resolve-from@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-3.0.0.tgz#b22c7af7d9d6881bc8b6e653335eebcb0a188748"