add showConfig support (#11588)

* draft: showConfig support

* feat: pass through showConfig command options

* update test file

* refactor: add createLogger to makeChainWalker

* serializing dynamic plugin instance

* fix flow errors

* chore: add tests on extended config

* fix: do not print empty presets

* add more test cases

* add windows testcases

* address review comments

* throw error when showConfigPath does not exist

* print reason when showConfig is targetting an ignored file

* remove showConfig: boolean

* refactor: simplify environment flag name

* rename test fixtures

* fix: throw when SHOW_CONFIG_FOR is not a regular file

* cleanup test fixtures

* add test on only

* Update packages/babel-core/src/config/files/configuration.js

Co-authored-by: Brian Ng <bng412@gmail.com>

* address review comments

* update test fixtures

* feat: sort config items in ascending priority

Co-authored-by: Brian Ng <bng412@gmail.com>

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with ignored file/in-files/babel.config.json

@@ -0,0 +1,14 @@
+{
+  "sourceType": "script",
+  "overrides": [
+    {
+      "test": "src/index.js",
+      "sourceType": "module"
+    }
+  ],
+  "env": {
+    "test": {
+      "ignore": ["./src/index.js"]
+    }
+  }
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with ignored file/options.json

@@ -0,0 +1,7 @@
+{
+  "args": ["./src/index.js"],
+  "env": {
+    "BABEL_SHOW_CONFIG_FOR": "./src/index.js"
+  },
+  "os": ["darwin", "linux"]
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with ignored file/stdout.txt

@@ -0,0 +1 @@
+No config is applied to "<CWD>/src/index.js" because it matches one of `ignore: ["./src/index.js"]` from "<CWD>"

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with multiple files-windows/in-files/babel.config.json

@@ -0,0 +1,13 @@
+{
+  "sourceType": "script",
+  "overrides": [
+    {
+      "test": "src/foo.js",
+      "sourceType": "module"
+    },
+    {
+      "test": "src/bar.js",
+      "sourceType": "script"
+    }
+  ]
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with multiple files-windows/options.json

@@ -0,0 +1,7 @@
+{
+  "args": ["./src", "--out-file", "./test.js"],
+  "os": ["win32"],
+  "env": {
+    "BABEL_SHOW_CONFIG_FOR": "./src/foo.js"
+  }
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with multiple files-windows/out-files/test.js

@@ -0,0 +1 @@
+"use strict";

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with multiple files-windows/stdout.txt

@@ -0,0 +1,31 @@
+Babel configs on "<CWD>/src/foo.js" (ascending priority):
+config <CWD>/babel.config.json
+{
+  "sourceType": "script"
+}
+
+config <CWD>/babel.config.json .overrides[0]
+{
+  "test": "src/foo.js",
+  "sourceType": "module"
+}
+
+config <CWD>/.babelrc
+{}
+
+programmatic options from @babel/cli
+{
+  "sourceFileName": "src/foo.js",
+  "presets": [
+    "<ROOTDIR>//packages//babel-preset-react"
+  ],
+  "plugins": [
+    "<ROOTDIR>//packages//babel-plugin-transform-arrow-functions",
+    "<ROOTDIR>//packages//babel-plugin-transform-strict-mode",
+    "<ROOTDIR>//packages//babel-plugin-transform-modules-commonjs"
+  ],
+  "caller": {
+    "name": "@babel/cli"
+  },
+  "filename": "src//foo.js"
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with multiple files/in-files/babel.config.json

@@ -0,0 +1,13 @@
+{
+  "sourceType": "script",
+  "overrides": [
+    {
+      "test": "src/foo.js",
+      "sourceType": "module"
+    },
+    {
+      "test": "src/bar.js",
+      "sourceType": "script"
+    }
+  ]
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with multiple files/options.json

@@ -0,0 +1,7 @@
+{
+  "args": ["./src", "--out-file", "./test.js"],
+  "os": ["darwin", "linux"],
+  "env": {
+    "BABEL_SHOW_CONFIG_FOR": "./src/foo.js"
+  }
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with multiple files/out-files/test.js

@@ -0,0 +1 @@
+"use strict";

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with multiple files/stdout.txt

@@ -0,0 +1,31 @@
+Babel configs on "<CWD>/src/foo.js" (ascending priority):
+config <CWD>/babel.config.json
+{
+  "sourceType": "script"
+}
+
+config <CWD>/babel.config.json .overrides[0]
+{
+  "test": "src/foo.js",
+  "sourceType": "module"
+}
+
+config <CWD>/.babelrc
+{}
+
+programmatic options from @babel/cli
+{
+  "sourceFileName": "src/foo.js",
+  "presets": [
+    "<ROOTDIR>/packages/babel-preset-react"
+  ],
+  "plugins": [
+    "<ROOTDIR>/packages/babel-plugin-transform-arrow-functions",
+    "<ROOTDIR>/packages/babel-plugin-transform-strict-mode",
+    "<ROOTDIR>/packages/babel-plugin-transform-modules-commonjs"
+  ],
+  "caller": {
+    "name": "@babel/cli"
+  },
+  "filename": "src/foo.js"
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with only file/in-files/babel.config.json

@@ -0,0 +1,14 @@
+{
+  "sourceType": "script",
+  "overrides": [
+    {
+      "test": "src/index.js",
+      "sourceType": "module"
+    }
+  ],
+  "env": {
+    "test": {
+      "only": ["./src/unicorn.js"]
+    }
+  }
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with only file/options.json

@@ -0,0 +1,7 @@
+{
+  "args": ["./src/index.js"],
+  "env": {
+    "BABEL_SHOW_CONFIG_FOR": "./src/index.js"
+  },
+  "os": ["darwin", "linux"]
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR with only file/stdout.txt

@@ -0,0 +1 @@
+No config is applied to "<CWD>/src/index.js" because it fails to match one of `only: ["./src/unicorn.js"]` from "<CWD>"

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR-windows/in-files/babel.config.json

@@ -0,0 +1,13 @@
+{
+  "sourceType": "script",
+  "overrides": [
+    {
+      "test": "src/foo.js",
+      "sourceType": "module"
+    },
+    {
+      "test": "src/bar.js",
+      "sourceType": "script"
+    }
+  ]
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR-windows/options.json

@@ -0,0 +1,7 @@
+{
+  "args": ["./src", "-d", "lib"],
+  "env": {
+    "BABEL_SHOW_CONFIG_FOR": "./src/foo.js"
+  },
+  "os": ["win32"]
+}

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR-windows/out-files/lib/bar.js

@@ -0,0 +1 @@
+"use strict";

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR-windows/stdout.txt

@@ -0,0 +1,32 @@
+Babel configs on "<CWD>/src/foo.js" (ascending priority):
+config <CWD>/babel.config.json
+{
+  "sourceType": "script"
+}
+
+config <CWD>/babel.config.json .overrides[0]
+{
+  "test": "src/foo.js",
+  "sourceType": "module"
+}
+
+config <CWD>/.babelrc
+{}
+
+programmatic options from @babel/cli
+{
+  "sourceFileName": "../src/foo.js",
+  "presets": [
+    "<ROOTDIR>//packages//babel-preset-react"
+  ],
+  "plugins": [
+    "<ROOTDIR>//packages//babel-plugin-transform-arrow-functions",
+    "<ROOTDIR>//packages//babel-plugin-transform-strict-mode",
+    "<ROOTDIR>//packages//babel-plugin-transform-modules-commonjs"
+  ],
+  "caller": {
+    "name": "@babel/cli"
+  },
+  "filename": "src//foo.js"
+}
+Successfully compiled 1 file with Babel (123ms).

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR/in-files/my-config.js

@@ -0,0 +1,40 @@
+module.exports = {
+  sourceType: "script",
+  plugins: [require("@foo/babel-plugin-1")],
+  extends: "./my-extended.js",
+  overrides: [
+    {
+      test: "src/index.js",
+      plugins: [["@foo/babel-plugin-2", { noDocumentAll: true }]],
+      env: {
+        test: {
+          plugins: [
+            "@foo/babel-plugin-1",
+            [
+              { name: "@foo/inline-babel-plugin-1", visitor: { Program() {} } },
+              { noDocumentAll: true },
+            ],
+          ],
+        },
+      },
+    },
+    {
+      exclude: "src/index.js",
+      plugins: ["@foo/babel-plugin-4"],
+    },
+  ],
+  env: {
+    test: {
+      plugins: [
+        [
+          "@foo/babel-plugin-3",
+          { noDocumentAll: true },
+          "@foo/babel-plugin-three",
+        ],
+      ],
+    },
+    development: {
+      plugins: ["@foo/babel-plugin-4"],
+    },
+  },
+};

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR/in-files/my-extended.js

@@ -0,0 +1,47 @@
+module.exports = {
+  sourceMaps: false,
+  presets: ["@foo/babel-preset-1"],
+  overrides: [
+    {
+      test: "src/index.js",
+      presets: [["@foo/babel-preset-2", { noDocumentAll: true }]],
+      env: {
+        test: {
+          presets: [
+            "@foo/babel-preset-1",
+            [
+              {
+                name: "@foo/inline-babel-preset-1",
+                plugins: [
+                  {
+                    name: "@foo/inline-babel-plugin-1",
+                    visitor: { Program() {} },
+                  },
+                ],
+              },
+              { noDocumentAll: true },
+            ],
+          ],
+        },
+      },
+    },
+    {
+      exclude: "src/index.js",
+      presets: ["@foo/babel-preset-4"],
+    },
+  ],
+  env: {
+    test: {
+      presets: [
+        [
+          "@foo/babel-preset-3",
+          { noDocumentAll: true },
+          "@foo/babel-preset-three",
+        ],
+      ],
+    },
+    development: {
+      presets: ["@foo/babel-preset-4"],
+    },
+  },
+};

packages/babel-cli/test/fixtures/babel/env - SHOW_CONFIG_FOR/options.json

@@ -0,0 +1,8 @@
+{
+  "args": ["--config-file", "./my-config.js", "./src/index.js"],
+  "env": {
+    "BABEL_ENV": "test",
+    "BABEL_SHOW_CONFIG_FOR": "./src/index.js"
+  },
+  "os": ["darwin", "linux"]
+}