add docs command

cli/prisma2/package.json

@@ -36,10 +36,12 @@
     "mocha": "6.1.4",
     "mz": "2.7.0",
     "nexus-prisma": "0.0.1-beta.4",
+    "open": "^6.4.0",
     "pkg-up": "3.1.0",
     "prisma-test-utils": "^0.2.5",
     "serialize-error": "^4.1.0",
     "strip-ansi": "^5.2.0",
+    "terminal-link": "^1.3.0",
     "tmp": "^0.1.0",
     "ts-jest": "24.0.2",
     "ts-mocha": "6.0.0",

cli/prisma2/src/Docs.ts

@@ -0,0 +1,36 @@
+import chalk from 'chalk'
+import { Command, Env, format, HelpError } from '@prisma/cli'
+import open from 'open'
+import terminalLink from 'terminal-link'
+import { link } from './link'
+
+/**
+ * $ prisma COMMAND_NAME docs
+ */
+export class Docs implements Command {
+  public static new(commandName: string, url: string): Docs {
+    return new Docs(commandName, url)
+  }
+
+  // static help template
+  private static help = commandName =>
+    format(`
+    Opens the docs page for ${commandName}.
+  `)
+  private constructor(private readonly commandName: string, private readonly url: string) {}
+
+  // parse arguments
+  public async parse(argv: string[]): Promise<string | Error> {
+    console.log(`Opening ${chalk.greenBright(this.commandName)} docs at ${link(this.url)}`)
+    await open(this.url)
+    return ''
+  }
+
+  // help message
+  public help(error?: string): string | HelpError {
+    if (error) {
+      return new HelpError(`\n${chalk.bold.red(`!`)} ${error}\n${Docs.help}`)
+    }
+    return Docs.help(this.commandName)
+  }
+}

cli/prisma2/src/bin.ts

@@ -29,6 +29,7 @@ import { predefinedGenerators } from './generators'
 import { Generate } from './Generate'
 import chalk from 'chalk'
 import { capture } from './capture'
+import { Docs } from './Docs'
 export { Photon } from '@prisma/studio-transports'
 
 /**
@@ -52,6 +53,7 @@ async function main(): Promise<number> {
         save: LiftSave.new(env),
         up: LiftUp.new(env),
         down: LiftDown.new(env),
+        docs: Docs.new('lift', 'https://github.com/prisma/prisma2/tree/master/docs'),
       },
       env,
     ),

cli/prisma2/src/link.ts

@@ -0,0 +1,8 @@
+import terminalLink from 'terminal-link'
+import chalk from 'chalk'
+
+export function link(url) {
+  return terminalLink(url, url, {
+    fallback: url => chalk.underline(url),
+  })
+}

cli/prisma2/yarn.lock

@@ -4267,6 +4267,13 @@ onetime@^5.1.0:
   dependencies:
     mimic-fn "^2.1.0"
 
+open@^6.4.0:
+  version "6.4.0"
+  resolved "https://registry.yarnpkg.com/open/-/open-6.4.0.tgz#5c13e96d0dc894686164f18965ecfe889ecfc8a9"
+  integrity sha512-IFenVPgF70fSm1keSd2iDBIDIBZkroLeuffXq+wKTzTJlBpesFWojV9lb8mzOfaAzM1sr7HQHuO0vtV0zYekGg==
+  dependencies:
+    is-wsl "^1.1.0"
+
 optimist@^0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/optimist/-/optimist-0.6.1.tgz#da3ea74686fa21a19a111c326e90eb15a0196686"