Gazania API

API reference for the gazania package.

createGazania

Creates a typed GraphQL query builder from a schema definition.

Signatures

function createGazania(): UnknownSchema
function createGazania<T extends DefineSchema<any, any>>(schema: T): TypedGazania<T>
function createGazania<T extends keyof Schemas>(url: T): TypedGazania<Schemas[T]>
function createGazania<T extends string>(url: T): UnknownSchema

Parameters

Parameter	Type	Description
url	string	A registered schema URL (recommended)
schema	DefineSchema<any, any>	A schema type definition, passed as {} as Schema

Returns

A Gazania object with typed builder methods.

Usage

import { createGazania } from 'gazania'

// With registered URL (recommended — no import of generated types needed)
const gazania = createGazania('https://api.example.com/graphql')

// With schema type (alternative)
import type { Schema } from './schema'

const gazania = createGazania({} as Schema)

// Without schema (untyped)
const gazania = createGazania()

Gazania

The builder object returned by createGazania. Provides methods for creating GraphQL operations.

gazania.query(name?)

Creates a query operation builder.

Parameter	Type	Default	Description
name	string	undefined	Operation name

Returns: OperationBuilderWithoutVars

gazania.mutation(name?)

Creates a mutation operation builder.

Parameter	Type	Default	Description
name	string	undefined	Operation name

Returns: OperationBuilderWithoutVars

gazania.subscription(name?)

Creates a subscription operation builder.

Parameter	Type	Default	Description
name	string	undefined	Operation name

Returns: OperationBuilderWithoutVars

gazania.fragment(name)

Creates a fragment builder.

Parameter	Type	Description
name	string	Fragment name

Returns: FragmentBuilder

gazania.partial(name)

Creates a partial (reusable selection) builder.

Parameter	Type	Description
name	string	Partial name

Returns: PartialBuilder

gazania.section(name)

Creates a section builder. Sections behave like partials at runtime, but their result types are transparent instead of masked.

Parameter	Type	Description
name	string	Section name

Returns: SectionBuilder

gazania.enum(value)

Creates a typed enum value for use in arguments.

Parameter	Type	Description
value	string	Enum value

Returns: EnumPackage<T> — A callable that returns the enum value.

---

OperationBuilderWithoutVars

Builder for operations that haven't declared variables yet.

.vars(definitions)

Declares variables for the operation.

Parameter	Type	Description
definitions	VariableDefinitions	Object mapping variable names to GraphQL type strings

Returns: OperationBuilderWithVars

gazania.query('Test')
  .vars({ id: 'Int!', name: 'String = "default"' })

.directives(fn)

Adds operation-level directives.

Parameter	Type	Description
fn	() => DirectiveInput[]	Function returning directive tuples

Returns: OperationBuilderWithoutVars

gazania.query('Test')
  .directives(() => [['@cached', { ttl: 60 }]])

.select(callback)

Executes the selection and builds the document.

Parameter	Type	Description
callback	($: RootDollar) => FieldDollar	Selection callback

Returns: DocumentNode (typed as TypedDocumentNode)

gazania.query('Test')
  .select($ => $.select(['id', 'name']))

---

OperationBuilderWithVars

Builder for operations that have declared variables.

.directives(fn)

Adds operation-level directives with access to variables.

Parameter	Type	Description
fn	(vars) => DirectiveInput[]	Function receiving variables and returning directive tuples

Returns: OperationBuilderWithVars

.select(callback)

Executes the selection with access to variables.

Parameter	Type	Description
callback	($: RootDollar, vars) => FieldDollar	Selection callback with variables

Returns: DocumentNode (typed as TypedDocumentNode)

gazania.query('Test')
  .vars({ id: 'Int!' })
  .select(($, vars) => $.select([{
    user: $ => $.args({ id: vars.id }).select(['name']),
  }]))

---

FragmentBuilder

Builder for named GraphQL fragments.

.on(typeName)

Specifies the type condition for the fragment.

Parameter	Type	Description
typeName	string	The GraphQL type name

Returns: FragmentBuilderOnType

FragmentBuilderOnType

.vars(definitions)

Declares variables for the fragment.

Returns: FragmentBuilderOnTypeWithVar

.directives(fn)

Adds directives to the fragment definition.

Parameter	Type	Description
fn	() => DirectiveInput[]	Function returning directive tuples

Returns: FragmentBuilderOnType

gazania.fragment('UserFields')
  .on('User')
  .directives(() => [['@deprecated', { reason: 'use NewFields' }]])
  .select($ => $.select(['id', 'name', 'email']))

.select(callback)

Builds the fragment document.

Returns: DocumentNode

gazania.fragment('UserFields')
  .on('User')
  .select($ => $.select(['id', 'name', 'email']))

FragmentBuilderOnTypeWithVar

.directives(fn)

Adds directives to the fragment definition with access to variable proxies.

Parameter	Type	Description
fn	(vars) => DirectiveInput[]	Function receiving variables and returning directive tuples

Returns: FragmentBuilderOnTypeWithVar

.select(callback)

Builds the fragment document with variable access.

Returns: DocumentNode

---

PartialBuilder

Builder for reusable selection partials.

.on(typeName)

Specifies the type condition.

Parameter	Type	Description
typeName	string	The GraphQL type name

Returns: PartialBuilderOnType

PartialBuilderOnType

.vars(definitions)

Declares variables for the partial.

Returns: PartialBuilderOnTypeWithVar

.directives(fn)

Adds directives to the fragment definition (not the spread site).

Parameter	Type	Description
fn	() => DirectiveInput[]	Function returning directive tuples

Returns: PartialBuilderOnType

const userPartial = gazania.partial('UserFields')
  .on('User')
  .directives(() => [['@deprecated', { reason: 'use newPartial' }]])
  .select($ => $.select(['id', 'name']))

.select(callback)

Builds the partial package.

Returns: PartialPackage — A function that can be spread into selections.

const userPartial = gazania.partial('UserFields')
  .on('User')
  .select($ => $.select(['id', 'name']))

// Usage in a query
gazania.query('GetUser')
  .select($ => $.select([{
    user: $ => $.select([...userPartial({})]),
  }]))

PartialBuilderOnTypeWithVar

.directives(fn)

Adds directives to the fragment definition with access to variable proxies.

Parameter	Type	Description
fn	(vars) => DirectiveInput[]	Function receiving variables and returning directive tuples

Returns: PartialBuilderOnTypeWithVar

.select(callback)

Builds the partial package with variable access.

Returns: PartialPackage

---

SectionBuilder

Builder for reusable selection sections.

.on(typeName)

Specifies the type condition.

Parameter	Type	Description
typeName	string	The GraphQL type name

Returns: SectionBuilderOnType

SectionBuilderOnType

.vars(definitions)

Declares variables for the section.

Returns: SectionBuilderOnTypeWithVar

.directives(fn)

Adds directives to the fragment definition (not the spread site).

Parameter	Type	Description
fn	() => DirectiveInput[]	Function returning directive tuples

Returns: SectionBuilderOnType

.select(callback)

Builds the section package.

Returns: SectionPackage — A function that can be spread into selections.

gazania.section('UserFields')
  .on('User')
  .select($ => $.select(['id', 'name']))

SectionBuilderOnTypeWithVar

.directives(fn)

Adds directives to the fragment definition with access to variable proxies.

Parameter	Type	Description
fn	(vars) => DirectiveInput[]	Function receiving variables and returning directive tuples

Returns: SectionBuilderOnTypeWithVar

.select(callback)

Builds the section package with variable access.

Returns: SectionPackage

---

FieldDollar

The dollar object available in field selection callbacks.

.args(arguments)

Sets field arguments.

Parameter	Type	Description
arguments	ArgumentMap	Object of argument key-value pairs

Returns: FieldDollar

.select(selection)

Sets the nested field selection.

Parameter	Type	Description
selection	SelectionInput	Array of field selections

Returns: FieldDollar

.directives(...directives)

Adds one or more directives to the field.

Parameter	Type	Description
directives	DirectiveInput[]	Directive tuples

Returns: FieldDollar

.enum(value)

Creates a typed enum value (convenience method).

Parameter	Type	Description
value	string	Enum value

Returns: EnumPackage<T>

---

Type utilities

ResultOf<T>

Extracts the result type from a TypedDocumentNode.

type Result = ResultOf<typeof myQuery>

VariablesOf<T>

Extracts the variables type from a TypedDocumentNode.

type Variables = VariablesOf<typeof myQuery>

TypedDocumentNode<TResult, TVars>

A DocumentNode that carries result and variable type information. Compatible with GraphQL clients that support typed documents.

---

Types

DirectiveInput

A directive is specified as a tuple:

type DirectiveInput = [name: string, args?: Record<string, unknown>]

VariableDefinitions

Variable definitions are specified as an object mapping variable names to GraphQL type strings:

type VariableDefinitions = Record<string, string>

SelectionInput

An array of field selections:

type SelectionInput = Array<string | SelectionObject>

SelectionObject

An object mapping field names to selection values:

interface SelectionObject {
  [key: string]: true | ((dollar: FieldDollar) => FieldDollar)
}

Schemas

Module augmentation interface for registering named schemas:

declare module 'gazania' {
  interface Schemas {
    'https://api.example.com/graphql': MySchema
  }
}

DefineSchema<Namespace, SchemaHash>

The type emitted by gazania generate to represent a GraphQL schema in the TypeScript type system.

• Namespace — Maps GraphQL type names to their TypeScript representations.
• SchemaHash — A schema identity string injected by codegen. This allows Gazania to distinguish operations from different schemas in projects that use multiple schemas. The second parameter has a default value and does not need to be specified manually.

// Generated output (simplified):
export type Schema = DefineSchema<{
  Query: Type_Query
  User: Type_User
  // ...
}, 'sha256:...'>

---

Extract API

Use the extract API for programmatic access to static query extraction. Import it from gazania/extract.

import { extract } from 'gazania/extract'

extract(options)

Scans source files for Gazania operations and returns a persisted query manifest.

import { createHash } from 'node:crypto'
import { resolve } from 'node:path'
import { extract, parseTSConfig } from 'gazania/extract'
import ts from 'typescript'

const hash = (body: string) => `sha256:${createHash('sha256').update(body).digest('hex')}`
const parsed = parseTSConfig(ts, resolve('tsconfig.json'), ts.sys)

const { manifest, skipped } = await extract({
  dir: resolve('src'),
  tsconfig: parsed,
  hash,
})

If a Gazania call cannot be statically evaluated, extract() throws an ExtractionError. You can suppress specific failure types by passing ignoreCategories:

const { manifest, skipped } = await extract({
  dir: resolve('src'),
  tsconfig: parsed,
  hash,
  ignoreCategories: ['unresolved', 'circular'],
})

parseTSConfig(ts, tsconfigPath, system)

Parses a tsconfig file into a ts.ParsedCommandLine. Re-exported from gazania/extract for convenience.

import { parseTSConfig } from 'gazania/extract'
import ts from 'typescript'

const parsed = parseTSConfig(ts, '/path/to/tsconfig.json', ts.sys)

ExtractionError

Thrown when Gazania detects calls that it cannot statically evaluate.

try {
  await extract({ dir: resolve('src'), tsconfig: parsed, hash })
}
catch (err) {
  if (err instanceof ExtractionError) {
    for (const entry of err.skipped) {
      console.error(`${entry.file}:${entry.line}: ${entry.reason}`)
    }
  }
}

Property	Type	Description
skipped	SkippedExtraction[]	Calls that failed extraction

validateManifest(manifest, schema)

Validates all operations in an extracted manifest against a GraphQL schema. For each operation, transitive fragment dependencies are resolved and merged into a single document so that fragment spreads are satisfied during validation.

import { validateManifest } from 'gazania/extract'
import { buildASTSchema, parse } from 'graphql'

const schema = buildASTSchema(parse(sdlString))
const { errors, warnings } = validateManifest(manifest, schema)

for (const e of errors) {
  console.error(`${e.loc.file}:${e.loc.start.line} ${e.message}`)
}

Returns { errors: ValidationError[], warnings: ValidationWarning[] }.

• Errors — produced by GraphQL spec compliance rules (specifiedRules). These indicate queries that will fail at runtime (unknown fields, missing arguments, type mismatches, etc.).
• Warnings — produced by NoDeprecatedCustomRule. These indicate usage of deprecated fields.

Types

ValidationError

Property	Type	Description
loc	SourceLoc	Source location of the invalid operation
message	string	Validation error message

ValidationWarning

Property	Type	Description
loc	SourceLoc	Source location of the operation using a deprecated field
message	string	Deprecation warning message

Types

ExtractOptions

Property	Type	Default	Description
dir	string	—	(required) Absolute path to directory to scan for source files
include	string	'**/*.{ts,tsx,js,jsx,vue,svelte}'	Glob pattern for files to include
hash	(body: string) => string	—	(required) Hash function for computing operation identifiers
tsconfig	ts.ParsedCommandLine	—	(required) Parsed TypeScript configuration. Use parseTSConfig() to create
ignoreCategories	SkippedExtractionCategory[]	[]	Categories of failures to suppress
logger	ExtractLogger	—	Logger for extraction diagnostics
fs	ExtractFS	ts.sys	File-system interface for all file operations
createHost	CreateHostFn	—	Override the default CompilerHost construction

ExtractFS

Minimal synchronous file-system interface. ts.sys satisfies this interface in Node.js environments. All methods must be synchronous — for async environments, preload files into memory before calling extract().

Method	Required	Description
readFile(path: string): string | undefined	Yes	Read file contents
readDirectory(path, extensions?, excludes?, includes?, depth?): string[]	Yes	Recursively list files in a directory. Should exclude node_modules and .git
fileExists(path: string): boolean	No	Check if a file exists. Falls back to readFile(path) !== undefined if not provided

import { extract, parseTSConfig } from 'gazania/extract'
import ts from 'typescript'

// Use with a virtual file system
const vfs: Map<string, string> = new Map([
  ['/project/src/operations/GetUser.ts', '...'],
  ['/project/tsconfig.json', '{"compilerOptions":{"target":"esnext","module":"esnext","moduleResolution":"bundler"}}'],
])

const parsed = parseTSConfig(ts, '/project/tsconfig.json', {
  ...ts.sys,
  readFile: path => vfs.get(path),
  readDirectory: (dir, extensions) =>
    [...vfs.keys()].filter(k => k.startsWith(dir) && extensions?.some(e => k.endsWith(e))),
})

await extract({
  dir: '/project/src',
  tsconfig: parsed,
  hash,
  fs: {
    readFile: path => vfs.get(path),
    readDirectory: (dir, extensions) =>
      [...vfs.keys()].filter(k => k.startsWith(dir) && extensions?.some(e => k.endsWith(e))),
  },
})

CreateHostFn

Override the default ts.CompilerHost construction. Receives the resolved ts.System (assembled from fs + ts.sys defaults) and the parsed compiler options from tsconfig.

type CreateHostFn = (
  ts: typeof import('typescript'),
  system: import('typescript').System,
  compilerOptions: import('typescript').CompilerOptions,
) => import('typescript').CompilerHost

ExtractResult

Property	Type	Description
manifest	ExtractManifest	The extracted manifest containing operations and fragments
skipped	SkippedExtraction[]	Gazania calls that were detected but not extracted

ManifestEntry

Property	Type	Description
body	string	The GraphQL operation or fragment body
hash	string	Body hash in algorithm:hex format
loc	SourceLoc	Source location in the original file

SourceLoc

Property	Type	Description
file	string	Absolute path of the source file
start	SourceLocation	Start position of the operation
end	SourceLocation	End position of the operation

SourceLocation

Property	Type	Description
line	number	1-based line number
column	number	1-based column number
offset	number	0-based character offset from the start of the file

SkippedExtraction

Property	Type	Description
file	string	Absolute path of the file with the skipped call
line	number	1-based line number
reason	string	Error message from the failed evaluation
category	SkippedExtractionCategory	Failure category

SkippedExtractionCategory

type SkippedExtractionCategory = 'unresolved' | 'analysis' | 'circular'

• unresolved — A referenced partial, section, or variable could not be found.
• analysis — The builder chain could not be statically evaluated. This often happens when it depends on runtime values.
• circular — Circular reference detected between partials or sections.