Remove dev command from CLI

cli/prisma2/src/CLI.ts

@@ -77,7 +77,6 @@ export class CLI implements Command {
     ${chalk.bold('Commands')}
 
           init   Setup Prisma for your app
-           dev   Develop your application in watch mode
           lift   Migrate your datamodel
     introspect   Get the datamodel of your database
       generate   Generate Photon
@@ -87,9 +86,6 @@ export class CLI implements Command {
       Initialize files for a new Prisma project
       ${chalk.dim(`$`)} prisma2 init
 
-      Start developing and auto migrating your changes locally
-      ${chalk.dim(`$`)} prisma2 dev
-
       Save your changes into a migration
       ${chalk.dim(`$`)} prisma2 lift save
   `)

cli/prisma2/src/Dev.ts

@@ -0,0 +1,19 @@
+import { Command, format } from '@prisma/cli'
+import chalk from 'chalk'
+
+export class Dev implements Command {
+  static new(): Dev {
+    return new Dev()
+  }
+  private constructor() {}
+  async parse(argv: string[]) {
+    return format(`
+      ${chalk.redBright('Prisma CLI does not include a \`dev\` command any more right now.')}
+
+      If you want to run Prisma Studio, use ${chalk.green('prisma2 studio')}.
+      If you want to generate the Prisma Client, use ${chalk.green('prisma2 generate')} (or ${chalk.green('prisma2 generate --watch')})
+      If you want to update your schema, use ${chalk.green('prisma2 introspect')}.
+      If you want to migrate your database, use ${chalk.green('prisma2 migrate')}.
+    `)
+  }
+}

cli/prisma2/src/bin.ts

@@ -41,6 +41,7 @@ import {
 } from '@prisma/lift'
 import { CLI } from './CLI'
 import { Introspect, Init } from '@prisma/introspection'
+import { Dev } from './Dev'
 import { Version } from './Version'
 import { Generate } from './Generate'
 import chalk from 'chalk'
@@ -81,7 +82,7 @@ async function main(): Promise<number> {
       }),
       'tmp-prepare': LiftTmpPrepare.new(),
       introspect: Introspect.new(),
-      dev: LiftWatch.new(aliases),
+      dev: Dev.new(),
       studio: StudioCommand.new(aliases),
       generate: Generate.new(),
       version: Version.new(),