feat: use react-native-init-func to generate example app (#421)

* chore: add react-native-init-func to package dependencies * refactor(prep): resolve *absolute* paths before generating example * test: replace absolute process cwd in output paths before taking snapshots * feat: use react-native-init-func to generate example app * refactor: make reactNativeInit overridable (for testing purposes) * test: update tests to use injected / mocked reactNativeInit function * test: remove test for react-native CLI tool no longer needed * test: remove test of missing react-native CLI (no longer relevant) * test: update test of missing Yarn CLI * refactor: update help text for --example-react-native-version * refactor: update help text for --generate-example * test: update test snapshots * doc: update option text in README.md * doc: update some more documentation in README.md BREAKING CHANGE: this may change how the React Native template version is used to generate the example app.
brody4hire · Mar 11, 2021 · 56e7dbf · 56e7dbf
1 parent 51f8666
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diff --git a/README.md b/README.md
@@ -57,13 +57,12 @@ __Outdated alternatives:__ see [acknowledgements](#acknowledgements) below
 
 ## Installation
 
-Packages required to be installed globally if the recommended example app is generated:
+Package required to be installed globally if the recommended example app is generated:
 
-- [`react-native-cli`](https://www.npmjs.com/package/react-native-cli)
 - [`yarn`](https://www.npmjs.com/package/yarn)
 
 ```
-$ npm install -g react-native-cli yarn
+$ npm install -g yarn
 ```
 
 To install this package:
@@ -105,10 +104,10 @@ Options:
   --author-email <authorEmail>              The author's email (Default: `yourname@email.com`)
   --license <license>                       The license type (Default: `MIT`)
   --use-apple-networking                    [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: Use `AFNetworking` dependency as a sample in the podspec & use it from the iOS code - see issue #426
-  --generate-example                        Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires both react-native-cli and yarn to be installed globally
+  --generate-example                        Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires Yarn to be installed globally
   --example-file-linkage                    DEPRECATED: do `yarn add file:../` instead of `yarn add link:../` in a generated example project, and add a postinstall workaround script, with no overwrite of example metro.config.js
   --example-name <exampleName>              Name for the example project (default: `example`)
-  --example-react-native-version <version>  React Native version for the generated example project (default: `react-native@latest`)
+  --example-react-native-version <version>  React Native template version for the generated example project, for example: react-native-tvos or react-native-tvos@0.62.2-1 (requires --tvos-enabled option); react-native@0.62 (default: `react-native@latest`)
   --write-example-podfile                   [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: write (or overwrite) example ios/Podfile
   -h, --help                                output usage information
 ```
@@ -143,10 +142,10 @@ createLibraryModule({
   authorEmail: String, /* The author's email (Default: `yourname@email.com`) */
   license: String, /* The license type of this library (Default: `MIT`) */
   useAppleNetworking: Boolean, /* [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: Use `AFNetworking` dependency as a sample in the podspec & use it from the iOS code - see issue #426 (Default: false) */
-  generateExample: Boolean, /* Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires both react-native-cli and yarn to be installed globally (Default: false) */
+  generateExample: Boolean, /* Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires Yarn to be installed globally (Default: false) */
   exampleFileLinkage: Boolean, /* DEPRECATED: do `yarn add file:../` instead of `yarn add link:../` in a generated example project, and add a postinstall workaround script, with no overwrite of example metro.config.js (Default: false) */
   exampleName: String, /* Name for the example project (Default: `example`) */
-  exampleReactNativeVersion: String, /* React Native version for the generated example project (Default: `react-native@latest`) */
+  exampleReactNativeVersion: String, /* React Native template version for the generated example project, for example: react-native-tvos or react-native-tvos@0.62.2-1 (requires --tvos-enabled option); react-native@0.62 (Default: `react-native@latest`) */
   writeExamplePodfile: Boolean, /* [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: write (or overwrite) example ios/Podfile (Default: false) */
 }
 ```
@@ -188,13 +187,15 @@ Otherwise, React Native will open its own window to run the Metro Bundler.
 To run on Android, do the following command (within `react-native-alice-helper/example`):
 
 ```
-react-native run-android
+npx react-native run-android
 ```
 
+(or `yarn android` on React Native starting with 0.61)
+
 This assumes that the `ANDROID_HOME` environmental variable is set properly. Here is a sample command that does not make such an assumption on a mac:
 
 ```
-ANDROID_HOME=~/Library/Android/sdk react-native run-android
+ANDROID_HOME=~/Library/Android/sdk npx react-native run-android
 ```
 
 For iOS:
@@ -208,9 +209,11 @@ cd ios && pod install && cd ..
 Then to run on iOS:
 
 ```
-react-native run-ios
+npx react-native run-ios
 ```
 
+(or `yarn ios` on React Native starting with 0.61)
+
 or do the following command to open the iOS project in Xcode:
 
 ```
@@ -254,12 +257,12 @@ It is *recommended* to start the Metro Bundler manually as described above (with
 yarn start
 ```
 
-To run on Android: do `react-native run-android` as described for the other example above.
+To run on Android: do `npx react-native run-android` as described for the other example above.
 
 To run on iOS (as described above):
 
 - _in case of clean checkout **only**_: do `pod install` in `ios` subdirectory
-- do `react-native run-ios` or `open ios/example.xcodeproj`
+- do `npx react-native run-ios` or `open ios/example.xcodeproj`
 
 __Expected result:__
 

diff --git a/lib/cli-command.js b/lib/cli-command.js
@@ -132,7 +132,7 @@ ${postCreateInstructions(createOptions)}`);
     description: '[iOS] Use `AFNetworking` dependency as a sample in the podspec & use it from the iOS code',
   }, {
     command: '--generate-example',
-    description: 'Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires both react-native-cli and yarn to be installed globally',
+    description: 'Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires Yarn to be installed globally',
   }, {
     command: '--example-file-linkage',
     description: "DEPRECATED: do `yarn add file:../` instead of `yarn add link:../` in a generated example project, and add a postinstall workaround script, with no overwrite of example metro.config.js",
@@ -142,7 +142,7 @@ ${postCreateInstructions(createOptions)}`);
     default: 'example',
   }, {
     command: '--example-react-native-version [exampleReactNativeVersion]',
-    description: 'React Native version for the generated example project',
+    description: 'React Native template version for the generated example project, for example: react-native-tvos or react-native-tvos@0.62.2-1 (requires --tvos-enabled option); react-native@0.62',
     default: 'react-native@latest',
   }, {
     command: '--write-example-podfile',

diff --git a/lib/lib.js b/lib/lib.js
@@ -14,6 +14,9 @@ const fsExtra = require('fs-extra');
 
 const jsonfile = require('jsonfile');
 
+// default reactNativeInit function
+const reactNativeInitDefault = require('react-native-init-func');
+
 // Internal imports:
 
 const normalizedOptions = require('./normalized-options');
@@ -88,6 +91,7 @@ const generateWithNormalizedOptions = ({
 }, {
   fs = fsExtra, // (this can be mocked out for testing purposes)
   execa = execaDefault, // (this can be mocked out for testing purposes)
+  reactNativeInit = reactNativeInitDefault // (can be overridden or mocked out for testing purposes)
 }) => {
   if (packageIdentifier === DEFAULT_PACKAGE_IDENTIFIER) {
     warn(`While \`{DEFAULT_PACKAGE_IDENTIFIER}\` is the default package
@@ -130,28 +134,16 @@ exampleReactNativeVersion: ${exampleReactNativeVersion}
   const commandSync = execa.commandSync;
 
   if (generateExample) {
-    const reactNativeVersionCommand = 'react-native --version';
     const yarnVersionCommand = 'yarn --version';
-
     const checkCliOptions = { stdio: 'inherit' };
-    const errorRemedyMessage = 'both react-native-cli and yarn CLI tools are needed to generate example project';
-
-    try {
-      info('CREATE: Check for valid react-native-cli tool version, as needed to generate the example project');
-      commandSync(reactNativeVersionCommand, checkCliOptions);
-      info(`${reactNativeVersionCommand} ok`);
-    } catch (e) {
-      throw new Error(
-        `${reactNativeVersionCommand} failed; ${errorRemedyMessage}`);
-    }
+    const errorRemedyMessage = 'yarn CLI is needed to generate example project';
 
     try {
       info('CREATE: Check for valid Yarn CLI tool version, as needed to generate the example project');
       commandSync(yarnVersionCommand, checkCliOptions);
       info(`${yarnVersionCommand} ok`);
     } catch (e) {
-      throw new Error(
-        `${yarnVersionCommand} failed; ${errorRemedyMessage}`);
+      throw new Error(`${yarnVersionCommand} failed ... ${errorRemedyMessage}`);
     }
 
     // NOTE: While the pod tool is also required for example on iOS,
@@ -195,22 +187,24 @@ exampleReactNativeVersion: ${exampleReactNativeVersion}
   // multiple test or sample apps in the future.
   const generateExampleApp =
     () => {
-      const exampleReactNativeInitCommand =
-        `react-native init ${exampleName} --version ${exampleReactNativeVersion}`;
-
-      info(
-        `CREATE example app with the following command: ${exampleReactNativeInitCommand}`);
+      // TODO: rename --example-react-native-version to --example-react-native-template
+      info(`CREATE example app with the following template: ${exampleReactNativeVersion}`);
 
-      const execOptions = { cwd: `./${moduleName}`, stdio: 'inherit' };
+      // resolve **absolute** module & example paths before
+      // react-native-init-func function call
+      // which may affect the process cwd state
+      // (absolute paths seem to be needed for the steps below function properly)
+      const modulePath = path.resolve('.', moduleName);
+      const pathExampleApp = path.join(modulePath, exampleName);
+      const exampleAppSubdirectory = path.join('.', moduleName, exampleName);
 
       // (with the work done in a promise chain)
       return Promise.resolve()
         .then(() => {
-          // We use synchronous execSync / commandSync call here
-          // which is able to output its stdout to stdout in this process.
-          // Note that any exception would be properly handled since this
-          // call is executed within a Promise.resolve().then() callback.
-          commandSync(exampleReactNativeInitCommand, execOptions);
+          return reactNativeInit([exampleName], {
+            template: exampleReactNativeVersion,
+            directory: exampleAppSubdirectory
+          });
         })
         .then(() => {
           // Render the example template
@@ -226,16 +220,13 @@ exampleReactNativeVersion: ${exampleReactNativeVersion}
 
           return Promise.all(
             exampleTemplates.map((template) => {
-              return renderTemplateIfValid(fs, moduleName, template, templateArgs);
+              return renderTemplateIfValid(fs, modulePath, template, templateArgs);
             })
           );
         })
         .then(() => {
           // Adds and link the new library
           return new Promise((resolve) => {
-            // determine this path before the next steps:
-            const pathExampleApp = `./${moduleName}/${exampleName}`;
-
             // postinstall workaround script *only* needed in case
             // the DEPRECATED --example-file-linkage option
             // (exampleFileLinkage: true) is used

diff --git a/package.json b/package.json
@@ -54,6 +54,7 @@
     "param-case": "^3.0.4",
     "pascal-case": "^3.1.2",
     "please-upgrade-node": "^3.2.0",
+    "react-native-init-func": "^0.0.3",
     "update-notifier": "^5.1.0"
   },
   "devDependencies": {

diff --git a/tests/integration/cli/help/__snapshots__/cli-help.test.js.snap b/tests/integration/cli/help/__snapshots__/cli-help.test.js.snap
@@ -20,10 +20,10 @@ Options:
   --author-email [authorEmail]                                The author's email (default: \\"yourname@email.com\\")
   --license [license]                                         The license type (default: \\"MIT\\")
   --use-apple-networking                                      [iOS] Use \`AFNetworking\` dependency as a sample in the podspec & use it from the iOS code
-  --generate-example                                          Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires both react-native-cli and yarn to be installed globally
+  --generate-example                                          Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires Yarn to be installed globally
   --example-file-linkage                                      DEPRECATED: do \`yarn add file:../\` instead of \`yarn add link:../\` in a generated example project, and add a postinstall workaround script, with no overwrite of example metro.config.js
   --example-name [exampleName]                                Name for the example project (default: \\"example\\")
-  --example-react-native-version [exampleReactNativeVersion]  React Native version for the generated example project (default: \\"react-native@latest\\")
+  --example-react-native-version [exampleReactNativeVersion]  React Native template version for the generated example project, for example: react-native-tvos or react-native-tvos@0.62.2-1 (requires --tvos-enabled option); react-native@0.62 (default: \\"react-native@latest\\")
   --write-example-podfile                                     [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: write (or overwrite) example ios/Podfile
   -h, --help                                                  display help for command"
 `;
diff --git a/tests/integration/cli/noargs/__snapshots__/cli-noargs.test.js.snap b/tests/integration/cli/noargs/__snapshots__/cli-noargs.test.js.snap
@@ -20,10 +20,10 @@ Options:
   --author-email [authorEmail]                                The author's email (default: \\"yourname@email.com\\")
   --license [license]                                         The license type (default: \\"MIT\\")
   --use-apple-networking                                      [iOS] Use \`AFNetworking\` dependency as a sample in the podspec & use it from the iOS code
-  --generate-example                                          Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires both react-native-cli and yarn to be installed globally
+  --generate-example                                          Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires Yarn to be installed globally
   --example-file-linkage                                      DEPRECATED: do \`yarn add file:../\` instead of \`yarn add link:../\` in a generated example project, and add a postinstall workaround script, with no overwrite of example metro.config.js
   --example-name [exampleName]                                Name for the example project (default: \\"example\\")
-  --example-react-native-version [exampleReactNativeVersion]  React Native version for the generated example project (default: \\"react-native@latest\\")
+  --example-react-native-version [exampleReactNativeVersion]  React Native template version for the generated example project, for example: react-native-tvos or react-native-tvos@0.62.2-1 (requires --tvos-enabled option); react-native@0.62 (default: \\"react-native@latest\\")
   --write-example-podfile                                     [iOS] EXPERIMENTAL FEATURE NOT SUPPORTED: write (or overwrite) example ios/Podfile
   -h, --help                                                  display help for command"
 `;
diff --git a/.../with-injection/cli/command/object/__snapshots__/lib-cli-command-object-text.test.js.snap b/.../with-injection/cli/command/object/__snapshots__/lib-cli-command-object-text.test.js.snap
@@ -68,7 +68,7 @@ Object {
     },
     Object {
       "command": "--generate-example",
-      "description": "Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires both react-native-cli and yarn to be installed globally",
+      "description": "Generate an example project and add the library module to it with symlink by defult, with overwrite of example metro.config.js to add workaround for Metro symlink issue - requires Yarn to be installed globally",
     },
     Object {
       "command": "--example-file-linkage",
@@ -82,7 +82,7 @@ Object {
     Object {
       "command": "--example-react-native-version [exampleReactNativeVersion]",
       "default": "react-native@latest",
-      "description": "React Native version for the generated example project",
+      "description": "React Native template version for the generated example project, for example: react-native-tvos or react-native-tvos@0.62.2-1 (requires --tvos-enabled option); react-native@0.62",
     },
     Object {
       "command": "--write-example-podfile",

diff --git a/...h-example/with-defaults/__snapshots__/create-view-with-example-with-defaults.test.js.snap b/...h-example/with-defaults/__snapshots__/create-view-with-example-with-defaults.test.js.snap
@@ -2,8 +2,6 @@
 
 exports[`create alice-bobbi view module with example, with defaults 1`] = `
 Array [
-  "* execa.commandSync command: react-native --version options: {\\"stdio\\":\\"inherit\\"}
-",
   "* execa.commandSync command: yarn --version options: {\\"stdio\\":\\"inherit\\"}
 ",
   "* ensureDir dir: react-native-alice-bobbi
@@ -792,13 +790,21 @@ content:
 
 <<<<<<<< ======== >>>>>>>>
 ",
-  "* execa.commandSync command: react-native init example --version react-native@latest options: {\\"cwd\\":\\"./react-native-alice-bobbi\\",\\"stdio\\":\\"inherit\\"}
-",
-  "* ensureDir dir: react-native-alice-bobbi/example/
+  Object {
+    "call": "reactNativeInit",
+    "nameArray": Array [
+      "example",
+    ],
+    "options": Object {
+      "directory": "react-native-alice-bobbi/example",
+      "template": "react-native@latest",
+    },
+  },
+  "* ensureDir dir: .../react-native-alice-bobbi/example/
 ",
-  "* ensureDir dir: react-native-alice-bobbi/example/
+  "* ensureDir dir: .../react-native-alice-bobbi/example/
 ",
-  "* outputFile name: react-native-alice-bobbi/example/metro.config.js
+  "* outputFile name: .../react-native-alice-bobbi/example/metro.config.js
 content:
 --------
 // metro.config.js
@@ -832,7 +838,7 @@ module.exports = {
 
 <<<<<<<< ======== >>>>>>>>
 ",
-  "* outputFile name: react-native-alice-bobbi/example/App.js
+  "* outputFile name: .../react-native-alice-bobbi/example/App.js
 content:
 --------
 /**
@@ -883,11 +889,11 @@ const styles = StyleSheet.create({
 
 <<<<<<<< ======== >>>>>>>>
 ",
-  "* execa.commandSync command: yarn add link:../ options: {\\"cwd\\":\\"./react-native-alice-bobbi/example\\",\\"stdio\\":\\"inherit\\"}
+  "* execa.commandSync command: yarn add link:../ options: {\\"cwd\\":\\".../react-native-alice-bobbi/example\\",\\"stdio\\":\\"inherit\\"}
 ",
-  "* execa.commandSync command: pod --version options: {\\"cwd\\":\\"./react-native-alice-bobbi/example/ios\\",\\"stdio\\":\\"inherit\\"}
+  "* execa.commandSync command: pod --version options: {\\"cwd\\":\\".../react-native-alice-bobbi/example/ios\\",\\"stdio\\":\\"inherit\\"}
 ",
-  "* execa.commandSync command: pod install options: {\\"cwd\\":\\"./react-native-alice-bobbi/example/ios\\",\\"stdio\\":\\"inherit\\"}
+  "* execa.commandSync command: pod install options: {\\"cwd\\":\\".../react-native-alice-bobbi/example/ios\\",\\"stdio\\":\\"inherit\\"}
 ",
 ]
 `;