feat(cli): skip git if already in a git repo, add --skipGit option

close #967

packages/@vue/cli/bin/vue.js

@@ -39,9 +39,10 @@ program
   .option('-p, --preset <presetName>', 'Skip prompts and use saved or remote preset')
   .option('-d, --default', 'Skip prompts and use default preset')
   .option('-i, --inlinePreset <json>', 'Skip prompts and use inline JSON string as preset')
-  .option('-g, --initialCommit <message>', 'Specify initial commit message (when git is available)')
   .option('-m, --packageManager <command>', 'Use specified npm client when installing dependencies')
   .option('-r, --registry <url>', 'Use specified npm registry when installing dependencies (only for npm)')
+  .option('-s, --skipGit', 'Do not setup git repository when creating project')
+  .option('-g, --git <message>', 'Specify initial commit message (when git is available)')
   .option('-f, --force', 'Overwrite target directory if it exists')
   .option('-c, --clone', 'Use git clone when fetching remote preset')
   .action((name, cmd) => {

packages/@vue/cli/lib/Creator.js

@@ -46,17 +46,15 @@ module.exports = class Creator {
     this.promptCompleteCbs = []
     this.createCompleteCbs = []
 
+    this.run = this.run.bind(this)
+
     const promptAPI = new PromptModuleAPI(this)
     promptModules.forEach(m => m(promptAPI))
   }
 
   async create (cliOptions = {}) {
     const isTestOrDebug = process.env.VUE_CLI_TEST || process.env.VUE_CLI_DEBUG
-    const { name, context, createCompleteCbs } = this
-    const run = (command, args) => {
-      if (!args) { [command, ...args] = command.split(/\s+/) }
-      return execa(command, args, { cwd: context })
-    }
+    const { run, name, context, createCompleteCbs } = this
 
     let preset
     if (cliOptions.preset) {
@@ -114,7 +112,8 @@ module.exports = class Creator {
 
     // intilaize git repository before installing deps
     // so that vue-cli-service can setup git hooks.
-    if (hasGit()) {
+    const shouldInitGit = await this.shouldInitGit(cliOptions)
+    if (shouldInitGit) {
       logWithSpinner(`🗃`, `Initializing git repository...`)
       await run('git init')
     }
@@ -158,7 +157,7 @@ module.exports = class Creator {
     }
 
     // commit initial state
-    if (hasGit()) {
+    if (shouldInitGit) {
       await run('git add -A')
       if (isTestOrDebug) {
         await run('git', ['config', 'user.name', 'test'])
@@ -181,6 +180,11 @@ module.exports = class Creator {
     generator.printExitLogs()
   }
 
+  run (command, args) {
+    if (!args) { [command, ...args] = command.split(/\s+/) }
+    return execa(command, args, { cwd: this.context })
+  }
+
   async promptAndResolvePreset () {
     // prompt
     await clearConsole(true)
@@ -379,4 +383,23 @@ module.exports = class Creator {
     debug('vue-cli:prompts')(prompts)
     return prompts
   }
+
+  async shouldInitGit (cliOptions) {
+    if (!hasGit()) {
+      return false
+    }
+    if (cliOptions.skipGit) {
+      return false
+    }
+    // check if we are in a git repo already
+    try {
+      await this.run('git', ['status'])
+    } catch (e) {
+      // if git status failed, let's create a fresh repo
+      return true
+    }
+    // if git status worked, it means we are already in a git repo
+    // so don't init again.
+    return false
+  }
 }