feat(codegen): add CLI to generate types given a codegen config

packages/@sanity/codegen/package.json

@@ -68,8 +68,10 @@
     "@babel/types": "^7.23.9",
     "debug": "^4.3.4",
     "globby": "^10.0.0",
+    "json5": "^2.2.3",
     "groq-js": "1.5.0-canary.1",
-    "tsconfig-paths": "^4.2.0"
+    "tsconfig-paths": "^4.2.0",
+    "zod": "^3.22.4"
   },
   "devDependencies": {
     "@jest/globals": "^29.7.0",

packages/@sanity/codegen/src/_exports/index.ts

@@ -1,3 +1,4 @@
+export {type CodegenConfig, readConfig} from '../readConfig'
 export {readSchema} from '../readSchema'
 export {findQueriesInPath} from '../typescript/findQueriesInPath'
 export {findQueriesInSource} from '../typescript/findQueriesInSource'

packages/@sanity/codegen/src/readConfig.ts

@@ -0,0 +1,28 @@
+import {readFile} from 'fs/promises'
+import * as json5 from 'json5'
+import * as z from 'zod'
+
+export const configDefintion = z.object({
+  path: z.string().or(z.array(z.string())).default('./src/**/*.{ts,tsx,js,jsx}'),
+  schema: z.string().default('./schema.json'),
+  generates: z.string().default('./sanity.types.ts'),
+})
+
+export type CodegenConfig = z.infer<typeof configDefintion>
+
+export async function readConfig(path: string): Promise<CodegenConfig> {
+  try {
+    const content = await readFile(path, 'utf-8')
+    const json = json5.parse(content)
+    return configDefintion.parseAsync(json)
+  } catch (error) {
+    if (error instanceof z.ZodError) {
+      throw new Error(`Error in config file\n ${error.errors.map((err) => err.message).join('\n')}`)
+    }
+    if (typeof error === 'object' && error !== null && 'code' in error && error.code === 'ENOENT') {
+      return configDefintion.parse({})
+    }
+
+    throw error
+  }
+}

packages/@sanity/codegen/src/typescript/findQueriesInPath.ts

@@ -25,6 +25,7 @@ type ResultQueries = {
 type ResultError = {
   type: 'error'
   error: Error
+  filename: string
 }
 
 /**
@@ -75,7 +76,7 @@ export async function* findQueriesInPath({
       yield {type: 'queries', filename, queries}
     } catch (error) {
       debug(`Error in file "${filename}"`, error)
-      yield {type: 'error', error}
+      yield {type: 'error', error, filename}
     }
   }
 }

packages/sanity/package.config.ts

@@ -44,6 +44,11 @@ export default defineConfig({
       require: './lib/_internal/cli/threads/extractSchema.js',
       default: './lib/_internal/cli/threads/extractSchema.js',
     },
+    './_internal/cli/threads/codegenGenerateTypes': {
+      source: './src/_internal/cli/threads/codegenGenerateTypes.ts',
+      require: './lib/_internal/cli/threads/codegenGenerateTypes.js',
+      default: './lib/_internal/cli/threads/codegenGenerateTypes.js',
+    },
   }),
 
   extract: {

packages/sanity/package.json

@@ -202,6 +202,7 @@
     "@sanity/block-tools": "3.34.0",
     "@sanity/cli": "3.34.0",
     "@sanity/client": "^6.15.5",
+    "@sanity/codegen": "workspace:*",
     "@sanity/color": "^3.0.0",
     "@sanity/diff": "3.34.0",
     "@sanity/diff-match-patch": "^3.1.1",
@@ -251,7 +252,7 @@
     "framer-motion": "^11.0.0",
     "get-it": "^8.4.13",
     "get-random-values-esm": "1.0.2",
-    "groq-js": "^1.1.12",
+    "groq-js": "1.5.0-canary.1",
     "hashlru": "^2.3.0",
     "history": "^5.3.0",
     "i18next": "^23.2.7",

packages/sanity/src/_internal/cli/actions/codegen/generateTypes.telemetry.ts

@@ -0,0 +1,16 @@
+import {defineTrace} from '@sanity/telemetry'
+
+interface TypesGeneratedTraceAttrubutes {
+  outputSize: number
+  queryTypes: number
+  schemaTypes: number
+  files: number
+  filesWithErrors: number
+  unknownTypes: number
+}
+
+export const TypesGeneratedTrace = defineTrace<TypesGeneratedTraceAttrubutes>({
+  name: 'Types Generated',
+  version: 0,
+  description: 'Trace emitted when generating TypeScript types for queries',
+})

packages/sanity/src/_internal/cli/actions/codegen/generateTypesAction.ts

@@ -0,0 +1,137 @@
+import {constants, open} from 'node:fs/promises'
+import {dirname, join} from 'node:path'
+
+import {type CliCommandArguments, type CliCommandContext} from '@sanity/cli'
+import {readConfig} from '@sanity/codegen'
+import readPkgUp from 'read-pkg-up'
+import {Worker} from 'worker_threads'
+
+import {
+  type CodegenGenerateTypesWorkerData,
+  type CodegenGenerateTypesWorkerMessage,
+} from '../../threads/codegenGenerateTypes'
+import {TypesGeneratedTrace} from './generateTypes.telemetry'
+
+export interface CodegenGenerateTypesCommandFlags {
+  configPath?: string
+}
+
+export default async function codegenGenerateAction(
+  args: CliCommandArguments<CodegenGenerateTypesCommandFlags>,
+  context: CliCommandContext,
+): Promise<void> {
+  const flags = args.extOptions
+  const {output, workDir, telemetry} = context
+
+  const trace = telemetry.trace(TypesGeneratedTrace)
+  trace.start()
+
+  const codegenConfig = await readConfig(flags.configPath || 'sanity-codegen.json')
+
+  const rootPkgPath = readPkgUp.sync({cwd: __dirname})?.path
+  if (!rootPkgPath) {
+    throw new Error('Could not find root directory for `sanity` package')
+  }
+
+  const workerPath = join(
+    dirname(rootPkgPath),
+    'lib',
+    '_internal',
+    'cli',
+    'threads',
+    'codegenGenerateTypes.js',
+  )
+
+  const spinner = output.spinner({}).start('Generating types')
+
+  const worker = new Worker(workerPath, {
+    workerData: {
+      workDir,
+      schemaPath: codegenConfig.schema,
+      searchPath: codegenConfig.path,
+    } satisfies CodegenGenerateTypesWorkerData,
+    // eslint-disable-next-line no-process-env
+    env: process.env,
+  })
+
+  const typeFile = await open(
+    join(process.cwd(), codegenConfig.generates),
+    // eslint-disable-next-line no-bitwise
+    constants.O_TRUNC | constants.O_CREAT | constants.O_WRONLY,
+  )
+
+  typeFile.write('// This file is generated by `sanity codegen generate`\n')
+
+  const stats = {
+    files: 0,
+    errors: 0,
+    queries: 0,
+    schemas: 0,
+    unknownTypes: 0,
+    size: 0,
+  }
+
+  await new Promise<void>((resolve, reject) => {
+    worker.addListener('message', (msg: CodegenGenerateTypesWorkerMessage) => {
+      if (msg.type === 'error') {
+        trace.error(msg.error)
+
+        if (msg.fatal) {
+          reject(msg.error)
+          return
+        }
+        const errorMessage = msg.filename
+          ? `${msg.error.message} in "${msg.filename}"`
+          : msg.error.message
+        spinner.fail(errorMessage)
+        stats.errors++
+        return
+      }
+      if (msg.type === 'complete') {
+        resolve()
+        return
+      }
+
+      let fileTypeString = `// ${msg.filename}\n`
+
+      if (msg.type === 'schema') {
+        stats.schemas += msg.length
+        fileTypeString += `${msg.schema}\n\n`
+        typeFile.write(fileTypeString)
+        return
+      }
+
+      stats.files++
+      for (const {queryName, query, type, unknownTypes} of msg.types) {
+        fileTypeString += `// ${queryName}\n`
+        fileTypeString += `// ${query.replace(/(\r\n|\n|\r)/gm, '')}\n`
+        fileTypeString += `${type}\n`
+        stats.queries++
+        stats.unknownTypes += unknownTypes
+      }
+      typeFile.write(`${fileTypeString}\n`)
+      stats.size += Buffer.byteLength(fileTypeString)
+    })
+    worker.addListener('error', reject)
+  })
+
+  typeFile.close()
+
+  trace.log({
+    outputSize: stats.size,
+    queryTypes: stats.queries,
+    schemaTypes: stats.schemas,
+    files: stats.files,
+    filesWithErrors: stats.errors,
+    unknownTypes: stats.unknownTypes,
+  })
+
+  trace.complete()
+  if (stats.errors > 0) {
+    spinner.warn(`Encountered errors in ${stats.errors} files while generating types`)
+  }
+
+  spinner.succeed(
+    `Generated TypeScript types for ${stats.schemas} schema types and ${stats.queries} queries in ${stats.files} files into: ${codegenConfig.generates}`,
+  )
+}

packages/sanity/src/_internal/cli/commands/codegen/generateTypesCommand.ts

@@ -0,0 +1,41 @@
+import {type CliCommandDefinition} from '@sanity/cli'
+
+const description = 'Generates codegen'
+
+const helpText = `
+**Note**: This command is experimental and subject to change.
+
+Options
+  --help, -h
+    Show this help text.
+
+Examples
+  # Generate types from a schema, generate schema with "sanity schema extract" first.
+  sanity codegen generate-types
+
+Configuration
+The codegen command uses the following configuration properties from sanity-codegen.json:
+{
+  "path": "'./src/**/*.{ts,tsx,js,jsx}'" // glob pattern to your typescript files
+  "schema": "schema.json", // path to your schema file, generated with 'sanity schema extract' command
+  "generates": "./sanity.types.ts" // path to the file where the types will be generated
+}
+
+The listed properties are the default values, and can be overridden in the configuration file.
+`
+
+const generateTypesCodegenCommand: CliCommandDefinition = {
+  name: 'generate-types',
+  group: 'codegen',
+  signature: '',
+  description,
+  helpText,
+  hideFromHelp: true,
+  action: async (args, context) => {
+    const mod = await import('../../actions/codegen/generateTypesAction')
+
+    return mod.default(args, context)
+  },
+} satisfies CliCommandDefinition
+
+export default generateTypesCodegenCommand

packages/sanity/src/_internal/cli/commands/index.ts

@@ -7,6 +7,7 @@ import enableBackupCommand from './backup/enableBackupCommand'
 import listBackupCommand from './backup/listBackupCommand'
 import buildCommand from './build/buildCommand'
 import checkCommand from './check/checkCommand'
+import generateTypesCodegenCommand from './codegen/generateTypesCommand'
 import configCheckCommand from './config/configCheckCommand'
 import addCorsOriginCommand from './cors/addCorsOriginCommand'
 import corsGroup from './cors/corsGroup'
@@ -97,6 +98,7 @@ const commands: (CliCommandDefinition | CliCommandGroupDefinition)[] = [
   queryDocumentsCommand,
   deleteDocumentsCommand,
   createDocumentsCommand,
+  generateTypesCodegenCommand,
   validateDocumentsCommand,
   graphqlGroup,
   listGraphQLAPIsCommand,