feat: Create package.json automatically

src/commands/build/index.js

@@ -1,14 +1,15 @@
 /* @flow */
 import runWebpackBuilder from "./webpack-build";
 import createParams from "./../../utils/params";
-import { installAllModules } from "../../utils/npm";
+import { installAllModules, createPackageJson } from "../../utils/npm";
 
 /**
  * Aik build command
  */
 export default function aikBuild(input: string[], flags: CLIFlags): Promise<*> {
   const [filename] = input;
   const params = createParams(filename, flags, "", true);
+  createPackageJson(process.cwd());
   installAllModules(process.cwd());
   return runWebpackBuilder(filename, flags, params);
 }

src/commands/dev-server/index.js

@@ -17,7 +17,8 @@ import {
 import {
   installAllModules,
   isModuleInstalled,
-  installModule
+  installModule,
+  createPackageJson
 } from "../../utils/npm";
 
 export function requestCreatingAnEntryPoint(
@@ -96,6 +97,8 @@ export default async function aikDevServer(
   await prepareEntryPoint(filename);
 
   print(devServerInvalidBuildMsg(), /* clear console */ true);
+
+  createPackageJson(process.cwd());
   installAllModules(process.cwd());
 
   if (flags.react) {

src/utils/__test__/__snapshots__/messages.test.js.snap

@@ -93,6 +93,14 @@ accidentally updated versions of npm modules Aik will run \\"npm install\\"
 
 exports[`Common Messages #installingModuleMsg 1`] = `"Installing module \\"react\\" ..."`;
 
+exports[`Common Messages #packageJsonHasNotBeenFound 1`] = `
+" WARNING  File \\"package.json\\" hasn't been found.
+
+In order to make subsequent builds more predictable Aik needs to create one.
+
+ WAIT  Creating package.json..."
+`;
+
 exports[`Dev Server Messages #devServerBanner all flags enabled 1`] = `
 "Entry point:      ./src/index.js
 Custom template:  index.html

src/utils/__test__/messages.test.js

@@ -6,6 +6,7 @@ import {
   fileDoesNotExistMsg,
   foundPackageJson,
   installingModuleMsg,
+  packageJsonHasNotBeenFound,
   devServerBanner,
   devServerInvalidBuildMsg,
   devServerCompiledSuccessfullyMsg,
@@ -76,6 +77,10 @@ describe("Common Messages", () => {
   test("#installingModuleMsg", () => {
     expect(print(installingModuleMsg("react"))).toMatchSnapshot();
   });
+
+  test("#packageJsonHasNotBeenFound", () => {
+    expect(print(packageJsonHasNotBeenFound())).toMatchSnapshot();
+  });
 });
 
 describe("Dev Server Messages", () => {

src/utils/messages.js

@@ -124,6 +124,20 @@ export function foundPackageJson(): string[] {
   ];
 }
 
+export function packageJsonHasNotBeenFound(): string[] {
+  return [
+    warningBadge() +
+      " " +
+      chalk.yellow('File "package.json" hasn\'t been found.'),
+    "",
+    `In order to make subsequent builds more ${chalk.yellow(
+      "predictable"
+    )} Aik needs to create one.`,
+    "",
+    waitBadge() + " " + chalk.blue("Creating package.json...")
+  ];
+}
+
 export function installingModuleMsg(moduleName: string): string[] {
   return [`Installing module "${chalk.yellow(moduleName)}" ...`];
 }

src/utils/npm.js

@@ -5,8 +5,10 @@ import path from "path";
 import resolveModule from "resolve";
 import {
   print,
+  addTopSpace,
   addBottomSpace,
   installingModuleMsg,
+  packageJsonHasNotBeenFound,
   foundPackageJson
 } from "./messages";
 
@@ -19,11 +21,6 @@ export function isModuleInstalled(moduleName: string): boolean {
   }
 }
 
-export function installModule(moduleName: string) {
-  execSync(`npm install ${moduleName} --silent`, { cwd: process.cwd() });
-  print(installingModuleMsg(moduleName));
-}
-
 export function hasPackageJson(cwd: string) {
   try {
     fs.statSync(path.join(cwd, "package.json"));
@@ -33,6 +30,28 @@ export function hasPackageJson(cwd: string) {
   }
 }
 
+export function hasDependencies(cwd: string): boolean {
+  try {
+    const packageJson = JSON.parse(
+      fs.readFileSync(path.join(cwd, "package.json"), "utf8")
+    );
+    return packageJson.dependencies || packageJson.devDependencies;
+  } catch (error) {
+    return false;
+  }
+}
+
+export function createPackageJson(cwd: string) {
+  if (hasPackageJson(cwd)) return;
+  print(addBottomSpace(addTopSpace(packageJsonHasNotBeenFound())));
+  execSync(`npm init -y`, { cwd, stdio: "inherit" });
+}
+
+export function installModule(moduleName: string) {
+  execSync(`npm install ${moduleName} --silent`, { cwd: process.cwd() });
+  print(installingModuleMsg(moduleName));
+}
+
 export function hasNodeModules(cwd: string) {
   try {
     fs.statSync(path.join(cwd, "node_modules"));
@@ -43,8 +62,10 @@ export function hasNodeModules(cwd: string) {
 }
 
 export function installAllModules(cwd: string) {
-  if (!hasPackageJson(cwd)) return;
-  if (hasNodeModules(cwd)) return;
+  if (!hasPackageJson(cwd) || hasNodeModules(cwd) || !hasDependencies(cwd)) {
+    return;
+  }
+
   print(addBottomSpace(foundPackageJson()), /* clear console */ true);
   spawnSync("npm", ["install", "--silent"], { cwd, stdio: "inherit" });
 }