feat: added support freezing

Author: antblood

src/commands/freeze.ts

@@ -0,0 +1,32 @@
+import {BaseCommand} from '../lib'
+
+const MUTATION = `mutation { freeze }`
+
+export default class Freeze extends BaseCommand {
+  static description = 'Freeze your backend.'
+  static hidden = true
+  static examples = [
+    '$ slash-graphql freeze -e https://frozen-mango.cloud.dgraph.io/graphql -t <apiToken>',
+    '$ slash-graphql freeze -e 0x42',
+  ]
+
+  static flags = {
+    ...BaseCommand.commonFlags,
+    ...BaseCommand.endpointFlags,
+  }
+
+  async run() {
+    const opts = this.parse(Freeze)
+    const backend = await this.backendFromOpts(opts)
+    const {errors} = await backend.slashAdminQuery<{freeze: any}>(MUTATION)
+    if (errors) {
+      for (const {message} of errors) {
+        this.error(message)
+      }
+      return
+    }
+    if (!opts.flags.quiet) {
+      this.log('Successfully froze backend')
+    }
+  }
+}