dangerfile.ts

import { danger, fail, markdown } from "danger"
import { printSchema } from "graphql/utilities/schemaPrinter"
import { readFileSync } from "fs"
import * as prettier from "prettier"
import * as jsdiff from "diff"

// Rule: encourage all new files to be TypeScript
const jsAppFiles = danger.git.created_files.filter(
  f => f.startsWith("src/") && f.endsWith(".js")
)

if (jsAppFiles.length) {
  const listed = danger.github.utils.fileLinks(jsAppFiles)
  fail(`Please use <code>*.ts</code> for new files. Found: ${listed}.`)
}

// Grab the built schema to skip all the babel path faff
import schema from "./build/src/schema"

// Compare a printed copy of the schema
// with the file in the repo.
const schemaText = printSchema(schema as any, { commentDescriptions: true })
const prettySchema = prettier.format(schemaText, { parser: "graphql" })
const localGQL = readFileSync("_schema.graphql", "utf8")
if (prettySchema !== localGQL) {
  fail(`Please update the schema in the root of the app via: 
  
\`yarn dump-schema _schema.graphql\`
  
Note: This script uses your current \`.env\` variables.
`)
  const diff = jsdiff.createPatch(
    "_schema.graphql",
    localGQL,
    prettySchema,
    "Version in Repo",
    "Added in this PR"
  )
  markdown("The changes to the Schema:\n\n```diff\n" + diff + "```")
}