Handle kebab-case args in babel-node. (#8046)

packages/babel-node/src/_babel-node.js

@@ -150,7 +150,10 @@ if (program.eval || program.print) {
       }
 
       if (arg[0] === "-") {
-        const parsedArg = program[arg.slice(2)];
+        const camelArg = arg
+          .slice(2)
+          .replace(/-(\w)/, (s, c) => c.toUpperCase());
+        const parsedArg = program[camelArg];
         if (
           arg === "-r" ||
           arg === "--require" ||

packages/babel-node/test/fixtures/babel-node/--config-file/in-files/configFile.js

@@ -0,0 +1,7 @@
+module.exports = function (api) {
+  api.cache.forever();
+
+  console.log("Config was loaded, so --config-file was used.");
+
+  return {};
+};

packages/babel-node/test/fixtures/babel-node/--config-file/in-files/index.js

@@ -0,0 +1 @@
+console.log("foo");

packages/babel-node/test/fixtures/babel-node/--config-file/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["--config-file", "./configFile.js", "index"]
+}

packages/babel-node/test/fixtures/babel-node/--config-file/stdout.txt

@@ -0,0 +1,2 @@
+Config was loaded, so --config-file was used.
+foo

packages/babel-node/test/fixtures/babel-node/--env-name/.babelrc

@@ -0,0 +1,7 @@
+{
+  "env": {
+    "env-name-test": {
+      "plugins": ["./logPlugin.js"]
+    }
+  }
+}

packages/babel-node/test/fixtures/babel-node/--env-name/in-files/index.js

@@ -0,0 +1 @@
+console.log("foo");

packages/babel-node/test/fixtures/babel-node/--env-name/in-files/logPlugin.js

@@ -0,0 +1,4 @@
+module.exports = function () {
+  console.log("Plugin was loaded, so --env-name matched.");
+  return {}
+}

packages/babel-node/test/fixtures/babel-node/--env-name/options.json

@@ -0,0 +1,3 @@
+{
+  "args": ["--env-name", "env-name-test", "index"]
+}

packages/babel-node/test/fixtures/babel-node/--env-name/stdout.txt

@@ -0,0 +1,2 @@
+Plugin was loaded, so --env-name matched.
+foo