mongodb/buildscripts/eslint

Upgrade ESLint version

Bundling ESLint executable

1. Install the latest Node.js if you don't have it.

2. Install pkg with npm.

   npm install -g pkg
   

3. Get ESLint source code.

   git clone git@github.com:eslint/eslint.git
   

4. Checkout the latest version using git tag.

   cd eslint
   git checkout v${version}
   

5. Add pkg options to package.json file.

   "pkg": {
     "scripts": [ "conf/**/*", "lib/**/*", "messages/**/*" ],
     "targets": [ "linux-x64", "macos-x64" ]
     },
   

6. Run pkg command to make ESLint executables.

   pkg .
   

7. Check that executables are working. Copy files to somewhere in your PATH and try to run it.

   Depending on your system

   eslint-linux --help
   

   or

   eslint-macos --help
   

(*) If executable fails to find some .js files there are extra steps required to be done before step 6.

Prepare archives

Rename produced files.

mv eslint-linux eslint-Linux-x86_64
mv eslint-macos eslint-Darwin-x86_64

Archive files.

tar -czvf eslint-${version}-linux.tar.gz eslint-Linux-x86_64
tar -czvf eslint-${version}-darwin.tar.gz eslint-Darwin-x86_64

Upload archives to boxes.10gen.com

Archives should be available by the following links:

https://s3.amazonaws.com/boxes.10gen.com/build/eslint-${version}-linux.tar.gz
https://s3.amazonaws.com/boxes.10gen.com/build/eslint-${version}-darwin.tar.gz

Build team has an access to do that. You can create a build ticket in Jira for them to do it (e.g. https://jira.mongodb.org/browse/BUILD-12984)

Update ESLint version in buildscripts/eslint.py

# Expected version of ESLint.
ESLINT_VERSION = "${version}"

Extra steps

Unfortunately pkg doesn't work well with require(variable) statements and force include files using assets or scripts options might not help.

For the ESLint version 7.22.0 the following change was applied to the source code to make everything work:

diff --git a/lib/cli-engine/cli-engine.js b/lib/cli-engine/cli-engine.js
index b1befaa04..e02230f83 100644
--- a/lib/cli-engine/cli-engine.js
+++ b/lib/cli-engine/cli-engine.js
@@ -987,43 +987,35 @@ class CLIEngine {
      */
     getFormatter(format) {
 
-        // default is stylish
-        const resolvedFormatName = format || "stylish";
-
-        // only strings are valid formatters
-        if (typeof resolvedFormatName === "string") {
-
-            // replace \ with / for Windows compatibility
-            const normalizedFormatName = resolvedFormatName.replace(/\\/gu, "/");
-
-            const slots = internalSlotsMap.get(this);
-            const cwd = slots ? slots.options.cwd : process.cwd();
-            const namespace = naming.getNamespaceFromTerm(normalizedFormatName);
-
-            let formatterPath;
-
-            // if there's a slash, then it's a file (TODO: this check seems dubious for scoped npm packages)
-            if (!namespace && normalizedFormatName.indexOf("/") > -1) {
-                formatterPath = path.resolve(cwd, normalizedFormatName);
-            } else {
-                try {
-                    const npmFormat = naming.normalizePackageName(normalizedFormatName, "eslint-formatter");
-
-                    formatterPath = ModuleResolver.resolve(npmFormat, path.join(cwd, "__placeholder__.js"));
-                } catch {
-                    formatterPath = path.resolve(__dirname, "formatters", normalizedFormatName);
-                }
-            }
-
-            try {
-                return require(formatterPath);
-            } catch (ex) {
-                ex.message = `There was a problem loading formatter: ${formatterPath}\nError: ${ex.message}`;
-                throw ex;
-            }
-
-        } else {
-            return null;
+        switch (format) {
+            case "checkstyle":
+                return require("./formatters/checkstyle.js");
+            case "codeframe":
+                return require("./formatters/codeframe.js");
+            case "compact":
+                return require("./formatters/compact.js");
+            case "html":
+                return require("./formatters/html.js");
+            case "jslint-xml":
+                return require("./formatters/jslint-xml.js");
+            case "json-with-metadata":
+                return require("./formatters/json-with-metadata.js");
+            case "json":
+                return require("./formatters/json.js");
+            case "junit":
+                return require("./formatters/junit.js");
+            case "stylish":
+                return require("./formatters/stylish.js");
+            case "table":
+                return require("./formatters/table.js");
+            case "tap":
+                return require("./formatters/tap.js");
+            case "unix":
+                return require("./formatters/unix.js");
+            case "visualstudio":
+                return require("./formatters/visualstudio.js");
+            default:
+                return require("./formatters/stylish.js");
         }
     }
 }