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import {
AlternateModeDiagnostics,
append,
arrayFrom,
ArrayLiteralExpression,
arrayToMap,
assign,
BuildOptions,
cast,
changeExtension,
CharacterCodes,
combinePaths,
CommandLineOption,
CommandLineOptionOfCustomType,
CommandLineOptionOfListType,
CompilerOptions,
CompilerOptionsValue,
computedOptions,
ConfigFileSpecs,
containsPath,
convertToRelativePath,
createCompilerDiagnostic,
createDiagnosticForNodeInSourceFile,
createGetCanonicalFileName,
Debug,
Diagnostic,
DiagnosticArguments,
DiagnosticMessage,
Diagnostics,
DidYouMeanOptionsDiagnostics,
directorySeparator,
emptyArray,
endsWith,
ensureTrailingDirectorySeparator,
every,
Expression,
extend,
Extension,
FileExtensionInfo,
fileExtensionIs,
fileExtensionIsOneOf,
filter,
filterMutate,
find,
findIndex,
firstOrUndefinedIterator,
flatten,
forEach,
forEachEntry,
forEachTsConfigPropArray,
getBaseFileName,
getDirectoryPath,
getFileMatcherPatterns,
getLocaleSpecificMessage,
getNormalizedAbsolutePath,
getRegexFromPattern,
getRegularExpressionForWildcard,
getRegularExpressionsForWildcards,
getRelativePathFromFile,
getSpellingSuggestion,
getSupportedExtensions,
getSupportedExtensionsWithJsonIfResolveJsonModule,
getTextOfPropertyName,
getTsConfigPropArrayElementValue,
hasExtension,
hasProperty,
ImportsNotUsedAsValues,
isArray,
isArrayLiteralExpression,
isComputedNonLiteralName,
isImplicitGlob,
isObjectLiteralExpression,
isRootedDiskPath,
isString,
isStringDoubleQuoted,
isStringLiteral,
JsonSourceFile,
JsxEmit,
length,
map,
mapDefined,
mapIterator,
MapLike,
ModuleDetectionKind,
ModuleKind,
ModuleResolutionKind,
NewLineKind,
Node,
NodeArray,
nodeNextJsonConfigResolver,
normalizePath,
normalizeSlashes,
NumericLiteral,
ObjectLiteralExpression,
ParseConfigHost,
ParsedCommandLine,
parseJsonText,
Path,
PollingWatchKind,
PrefixUnaryExpression,
ProjectReference,
PropertyAssignment,
PropertyName,
removeTrailingDirectorySeparator,
returnTrue,
ScriptTarget,
some,
startsWith,
StringLiteral,
SyntaxKind,
sys,
toFileNameLowerCase,
toPath,
tracing,
TsConfigOnlyOption,
TsConfigSourceFile,
TypeAcquisition,
unescapeLeadingUnderscores,
WatchDirectoryFlags,
WatchDirectoryKind,
WatchFileKind,
WatchOptions,
} from "./_namespaces/ts";
/** @internal */
export const compileOnSaveCommandLineOption: CommandLineOption = {
name: "compileOnSave",
type: "boolean",
defaultValueDescription: false,
};
const jsxOptionMap = new Map(Object.entries({
"preserve": JsxEmit.Preserve,
"react-native": JsxEmit.ReactNative,
"react": JsxEmit.React,
"react-jsx": JsxEmit.ReactJSX,
"react-jsxdev": JsxEmit.ReactJSXDev,
}));
/** @internal */
export const inverseJsxOptionMap = new Map(mapIterator(jsxOptionMap.entries(), ([key, value]: [string, JsxEmit]) => ["" + value, key] as const));
// NOTE: The order here is important to default lib ordering as entries will have the same
// order in the generated program (see `getDefaultLibPriority` in program.ts). This
// order also affects overload resolution when a type declared in one lib is
// augmented in another lib.
const libEntries: [string, string][] = [
// JavaScript only
["es5", "lib.es5.d.ts"],
["es6", "lib.es2015.d.ts"],
["es2015", "lib.es2015.d.ts"],
["es7", "lib.es2016.d.ts"],
["es2016", "lib.es2016.d.ts"],
["es2017", "lib.es2017.d.ts"],
["es2018", "lib.es2018.d.ts"],
["es2019", "lib.es2019.d.ts"],
["es2020", "lib.es2020.d.ts"],
["es2021", "lib.es2021.d.ts"],
["es2022", "lib.es2022.d.ts"],
["es2023", "lib.es2023.d.ts"],
["esnext", "lib.esnext.d.ts"],
// Host only
["dom", "lib.dom.d.ts"],
["dom.iterable", "lib.dom.iterable.d.ts"],
["webworker", "lib.webworker.d.ts"],
["webworker.importscripts", "lib.webworker.importscripts.d.ts"],
["webworker.iterable", "lib.webworker.iterable.d.ts"],
["scripthost", "lib.scripthost.d.ts"],
// ES2015 Or ESNext By-feature options
["es2015.core", "lib.es2015.core.d.ts"],
["es2015.collection", "lib.es2015.collection.d.ts"],
["es2015.generator", "lib.es2015.generator.d.ts"],
["es2015.iterable", "lib.es2015.iterable.d.ts"],
["es2015.promise", "lib.es2015.promise.d.ts"],
["es2015.proxy", "lib.es2015.proxy.d.ts"],
["es2015.reflect", "lib.es2015.reflect.d.ts"],
["es2015.symbol", "lib.es2015.symbol.d.ts"],
["es2015.symbol.wellknown", "lib.es2015.symbol.wellknown.d.ts"],
["es2016.array.include", "lib.es2016.array.include.d.ts"],
["es2016.intl", "lib.es2016.intl.d.ts"],
["es2017.date", "lib.es2017.date.d.ts"],
["es2017.object", "lib.es2017.object.d.ts"],
["es2017.sharedmemory", "lib.es2017.sharedmemory.d.ts"],
["es2017.string", "lib.es2017.string.d.ts"],
["es2017.intl", "lib.es2017.intl.d.ts"],
["es2017.typedarrays", "lib.es2017.typedarrays.d.ts"],
["es2018.asyncgenerator", "lib.es2018.asyncgenerator.d.ts"],
["es2018.asynciterable", "lib.es2018.asynciterable.d.ts"],
["es2018.intl", "lib.es2018.intl.d.ts"],
["es2018.promise", "lib.es2018.promise.d.ts"],
["es2018.regexp", "lib.es2018.regexp.d.ts"],
["es2019.array", "lib.es2019.array.d.ts"],
["es2019.object", "lib.es2019.object.d.ts"],
["es2019.string", "lib.es2019.string.d.ts"],
["es2019.symbol", "lib.es2019.symbol.d.ts"],
["es2019.intl", "lib.es2019.intl.d.ts"],
["es2020.bigint", "lib.es2020.bigint.d.ts"],
["es2020.date", "lib.es2020.date.d.ts"],
["es2020.promise", "lib.es2020.promise.d.ts"],
["es2020.sharedmemory", "lib.es2020.sharedmemory.d.ts"],
["es2020.string", "lib.es2020.string.d.ts"],
["es2020.symbol.wellknown", "lib.es2020.symbol.wellknown.d.ts"],
["es2020.intl", "lib.es2020.intl.d.ts"],
["es2020.number", "lib.es2020.number.d.ts"],
["es2021.promise", "lib.es2021.promise.d.ts"],
["es2021.string", "lib.es2021.string.d.ts"],
["es2021.weakref", "lib.es2021.weakref.d.ts"],
["es2021.intl", "lib.es2021.intl.d.ts"],
["es2022.array", "lib.es2022.array.d.ts"],
["es2022.error", "lib.es2022.error.d.ts"],
["es2022.intl", "lib.es2022.intl.d.ts"],
["es2022.object", "lib.es2022.object.d.ts"],
["es2022.sharedmemory", "lib.es2022.sharedmemory.d.ts"],
["es2022.string", "lib.es2022.string.d.ts"],
["es2022.regexp", "lib.es2022.regexp.d.ts"],
["es2023.array", "lib.es2023.array.d.ts"],
["es2023.collection", "lib.es2023.collection.d.ts"],
["esnext.array", "lib.es2023.array.d.ts"],
["esnext.collection", "lib.es2023.collection.d.ts"],
["esnext.symbol", "lib.es2019.symbol.d.ts"],
["esnext.asynciterable", "lib.es2018.asynciterable.d.ts"],
["esnext.intl", "lib.esnext.intl.d.ts"],
["esnext.disposable", "lib.esnext.disposable.d.ts"],
["esnext.bigint", "lib.es2020.bigint.d.ts"],
["esnext.string", "lib.es2022.string.d.ts"],
["esnext.promise", "lib.esnext.promise.d.ts"],
["esnext.weakref", "lib.es2021.weakref.d.ts"],
["esnext.decorators", "lib.esnext.decorators.d.ts"],
["decorators", "lib.decorators.d.ts"],
["decorators.legacy", "lib.decorators.legacy.d.ts"],
];
/**
* An array of supported "lib" reference file names used to determine the order for inclusion
* when referenced, as well as for spelling suggestions. This ensures the correct ordering for
* overload resolution when a type declared in one lib is extended by another.
*
* @internal
*/
export const libs = libEntries.map(entry => entry[0]);
/**
* A map of lib names to lib files. This map is used both for parsing the "lib" command line
* option as well as for resolving lib reference directives.
*
* @internal
*/
export const libMap = new Map(libEntries);
// Watch related options
/** @internal */
export const optionsForWatch: CommandLineOption[] = [
{
name: "watchFile",
type: new Map(Object.entries({
fixedpollinginterval: WatchFileKind.FixedPollingInterval,
prioritypollinginterval: WatchFileKind.PriorityPollingInterval,
dynamicprioritypolling: WatchFileKind.DynamicPriorityPolling,
fixedchunksizepolling: WatchFileKind.FixedChunkSizePolling,
usefsevents: WatchFileKind.UseFsEvents,
usefseventsonparentdirectory: WatchFileKind.UseFsEventsOnParentDirectory,
})),
category: Diagnostics.Watch_and_Build_Modes,
description: Diagnostics.Specify_how_the_TypeScript_watch_mode_works,
defaultValueDescription: WatchFileKind.UseFsEvents,
},
{
name: "watchDirectory",
type: new Map(Object.entries({
usefsevents: WatchDirectoryKind.UseFsEvents,
fixedpollinginterval: WatchDirectoryKind.FixedPollingInterval,
dynamicprioritypolling: WatchDirectoryKind.DynamicPriorityPolling,
fixedchunksizepolling: WatchDirectoryKind.FixedChunkSizePolling,
})),
category: Diagnostics.Watch_and_Build_Modes,
description: Diagnostics.Specify_how_directories_are_watched_on_systems_that_lack_recursive_file_watching_functionality,
defaultValueDescription: WatchDirectoryKind.UseFsEvents,
},
{
name: "fallbackPolling",
type: new Map(Object.entries({
fixedinterval: PollingWatchKind.FixedInterval,
priorityinterval: PollingWatchKind.PriorityInterval,
dynamicpriority: PollingWatchKind.DynamicPriority,
fixedchunksize: PollingWatchKind.FixedChunkSize,
})),
category: Diagnostics.Watch_and_Build_Modes,
description: Diagnostics.Specify_what_approach_the_watcher_should_use_if_the_system_runs_out_of_native_file_watchers,
defaultValueDescription: PollingWatchKind.PriorityInterval,
},
{
name: "synchronousWatchDirectory",
type: "boolean",
category: Diagnostics.Watch_and_Build_Modes,
description: Diagnostics.Synchronously_call_callbacks_and_update_the_state_of_directory_watchers_on_platforms_that_don_t_support_recursive_watching_natively,
defaultValueDescription: false,
},
{
name: "excludeDirectories",
type: "list",
element: {
name: "excludeDirectory",
type: "string",
isFilePath: true,
extraValidation: specToDiagnostic,
},
category: Diagnostics.Watch_and_Build_Modes,
description: Diagnostics.Remove_a_list_of_directories_from_the_watch_process,
},
{
name: "excludeFiles",
type: "list",
element: {
name: "excludeFile",
type: "string",
isFilePath: true,
extraValidation: specToDiagnostic,
},
category: Diagnostics.Watch_and_Build_Modes,
description: Diagnostics.Remove_a_list_of_files_from_the_watch_mode_s_processing,
},
];
/** @internal */
export const commonOptionsWithBuild: CommandLineOption[] = [
{
name: "help",
shortName: "h",
type: "boolean",
showInSimplifiedHelpView: true,
isCommandLineOnly: true,
category: Diagnostics.Command_line_Options,
description: Diagnostics.Print_this_message,
defaultValueDescription: false,
},
{
name: "help",
shortName: "?",
type: "boolean",
isCommandLineOnly: true,
category: Diagnostics.Command_line_Options,
defaultValueDescription: false,
},
{
name: "watch",
shortName: "w",
type: "boolean",
showInSimplifiedHelpView: true,
isCommandLineOnly: true,
category: Diagnostics.Command_line_Options,
description: Diagnostics.Watch_input_files,
defaultValueDescription: false,
},
{
name: "preserveWatchOutput",
type: "boolean",
showInSimplifiedHelpView: false,
category: Diagnostics.Output_Formatting,
description: Diagnostics.Disable_wiping_the_console_in_watch_mode,
defaultValueDescription: false,
},
{
name: "listFiles",
type: "boolean",
category: Diagnostics.Compiler_Diagnostics,
description: Diagnostics.Print_all_of_the_files_read_during_the_compilation,
defaultValueDescription: false,
},
{
name: "explainFiles",
type: "boolean",
category: Diagnostics.Compiler_Diagnostics,
description: Diagnostics.Print_files_read_during_the_compilation_including_why_it_was_included,
defaultValueDescription: false,
},
{
name: "listEmittedFiles",
type: "boolean",
category: Diagnostics.Compiler_Diagnostics,
description: Diagnostics.Print_the_names_of_emitted_files_after_a_compilation,
defaultValueDescription: false,
},
{
name: "pretty",
type: "boolean",
showInSimplifiedHelpView: true,
category: Diagnostics.Output_Formatting,
description: Diagnostics.Enable_color_and_formatting_in_TypeScript_s_output_to_make_compiler_errors_easier_to_read,
defaultValueDescription: true,
},
{
name: "traceResolution",
type: "boolean",
category: Diagnostics.Compiler_Diagnostics,
description: Diagnostics.Log_paths_used_during_the_moduleResolution_process,
defaultValueDescription: false,
},
{
name: "diagnostics",
type: "boolean",
category: Diagnostics.Compiler_Diagnostics,
description: Diagnostics.Output_compiler_performance_information_after_building,
defaultValueDescription: false,
},
{
name: "extendedDiagnostics",
type: "boolean",
category: Diagnostics.Compiler_Diagnostics,
description: Diagnostics.Output_more_detailed_compiler_performance_information_after_building,
defaultValueDescription: false,
},
{
name: "generateCpuProfile",
type: "string",
isFilePath: true,
paramType: Diagnostics.FILE_OR_DIRECTORY,
category: Diagnostics.Compiler_Diagnostics,
description: Diagnostics.Emit_a_v8_CPU_profile_of_the_compiler_run_for_debugging,
defaultValueDescription: "profile.cpuprofile",
},
{
name: "generateTrace",
type: "string",
isFilePath: true,
isCommandLineOnly: true,
paramType: Diagnostics.DIRECTORY,
category: Diagnostics.Compiler_Diagnostics,
description: Diagnostics.Generates_an_event_trace_and_a_list_of_types,
},
{
name: "incremental",
shortName: "i",
type: "boolean",
category: Diagnostics.Projects,
description: Diagnostics.Save_tsbuildinfo_files_to_allow_for_incremental_compilation_of_projects,
transpileOptionValue: undefined,
defaultValueDescription: Diagnostics.false_unless_composite_is_set,
},
{
name: "declaration",
shortName: "d",
type: "boolean",
// Not setting affectsEmit because we calculate this flag might not affect full emit
affectsBuildInfo: true,
showInSimplifiedHelpView: true,
category: Diagnostics.Emit,
transpileOptionValue: undefined,
description: Diagnostics.Generate_d_ts_files_from_TypeScript_and_JavaScript_files_in_your_project,
defaultValueDescription: Diagnostics.false_unless_composite_is_set,
},
{
name: "declarationMap",
type: "boolean",
// Not setting affectsEmit because we calculate this flag might not affect full emit
affectsBuildInfo: true,
showInSimplifiedHelpView: true,
category: Diagnostics.Emit,
transpileOptionValue: undefined,
defaultValueDescription: false,
description: Diagnostics.Create_sourcemaps_for_d_ts_files,
},
{
name: "emitDeclarationOnly",
type: "boolean",
// Not setting affectsEmit because we calculate this flag might not affect full emit
affectsBuildInfo: true,
showInSimplifiedHelpView: true,
category: Diagnostics.Emit,
description: Diagnostics.Only_output_d_ts_files_and_not_JavaScript_files,
transpileOptionValue: undefined,
defaultValueDescription: false,
},
{
name: "sourceMap",
type: "boolean",
// Not setting affectsEmit because we calculate this flag might not affect full emit
affectsBuildInfo: true,
showInSimplifiedHelpView: true,
category: Diagnostics.Emit,
defaultValueDescription: false,
description: Diagnostics.Create_source_map_files_for_emitted_JavaScript_files,
},
{
name: "inlineSourceMap",
type: "boolean",
// Not setting affectsEmit because we calculate this flag might not affect full emit
affectsBuildInfo: true,
category: Diagnostics.Emit,
description: Diagnostics.Include_sourcemap_files_inside_the_emitted_JavaScript,
defaultValueDescription: false,
},
{
name: "assumeChangesOnlyAffectDirectDependencies",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsEmit: true,
affectsBuildInfo: true,
category: Diagnostics.Watch_and_Build_Modes,
description: Diagnostics.Have_recompiles_in_projects_that_use_incremental_and_watch_mode_assume_that_changes_within_a_file_will_only_affect_files_directly_depending_on_it,
defaultValueDescription: false,
},
{
name: "locale",
type: "string",
category: Diagnostics.Command_line_Options,
isCommandLineOnly: true,
description: Diagnostics.Set_the_language_of_the_messaging_from_TypeScript_This_does_not_affect_emit,
defaultValueDescription: Diagnostics.Platform_specific,
},
];
/** @internal */
export const targetOptionDeclaration: CommandLineOptionOfCustomType = {
name: "target",
shortName: "t",
type: new Map(Object.entries({
es3: ScriptTarget.ES3,
es5: ScriptTarget.ES5,
es6: ScriptTarget.ES2015,
es2015: ScriptTarget.ES2015,
es2016: ScriptTarget.ES2016,
es2017: ScriptTarget.ES2017,
es2018: ScriptTarget.ES2018,
es2019: ScriptTarget.ES2019,
es2020: ScriptTarget.ES2020,
es2021: ScriptTarget.ES2021,
es2022: ScriptTarget.ES2022,
esnext: ScriptTarget.ESNext,
})),
affectsSourceFile: true,
affectsModuleResolution: true,
affectsEmit: true,
affectsBuildInfo: true,
deprecatedKeys: new Set(["es3"]),
paramType: Diagnostics.VERSION,
showInSimplifiedHelpView: true,
category: Diagnostics.Language_and_Environment,
description: Diagnostics.Set_the_JavaScript_language_version_for_emitted_JavaScript_and_include_compatible_library_declarations,
defaultValueDescription: ScriptTarget.ES5,
};
/** @internal */
export const moduleOptionDeclaration: CommandLineOptionOfCustomType = {
name: "module",
shortName: "m",
type: new Map(Object.entries({
none: ModuleKind.None,
commonjs: ModuleKind.CommonJS,
amd: ModuleKind.AMD,
system: ModuleKind.System,
umd: ModuleKind.UMD,
es6: ModuleKind.ES2015,
es2015: ModuleKind.ES2015,
es2020: ModuleKind.ES2020,
es2022: ModuleKind.ES2022,
esnext: ModuleKind.ESNext,
node16: ModuleKind.Node16,
nodenext: ModuleKind.NodeNext,
})),
affectsSourceFile: true,
affectsModuleResolution: true,
affectsEmit: true,
affectsBuildInfo: true,
paramType: Diagnostics.KIND,
showInSimplifiedHelpView: true,
category: Diagnostics.Modules,
description: Diagnostics.Specify_what_module_code_is_generated,
defaultValueDescription: undefined,
};
const commandOptionsWithoutBuild: CommandLineOption[] = [
// CommandLine only options
{
name: "all",
type: "boolean",
showInSimplifiedHelpView: true,
category: Diagnostics.Command_line_Options,
description: Diagnostics.Show_all_compiler_options,
defaultValueDescription: false,
},
{
name: "version",
shortName: "v",
type: "boolean",
showInSimplifiedHelpView: true,
category: Diagnostics.Command_line_Options,
description: Diagnostics.Print_the_compiler_s_version,
defaultValueDescription: false,
},
{
name: "init",
type: "boolean",
showInSimplifiedHelpView: true,
category: Diagnostics.Command_line_Options,
description: Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file,
defaultValueDescription: false,
},
{
name: "project",
shortName: "p",
type: "string",
isFilePath: true,
showInSimplifiedHelpView: true,
category: Diagnostics.Command_line_Options,
paramType: Diagnostics.FILE_OR_DIRECTORY,
description: Diagnostics.Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json,
},
{
name: "build",
type: "boolean",
shortName: "b",
showInSimplifiedHelpView: true,
category: Diagnostics.Command_line_Options,
description: Diagnostics.Build_one_or_more_projects_and_their_dependencies_if_out_of_date,
defaultValueDescription: false,
},
{
name: "showConfig",
type: "boolean",
showInSimplifiedHelpView: true,
category: Diagnostics.Command_line_Options,
isCommandLineOnly: true,
description: Diagnostics.Print_the_final_configuration_instead_of_building,
defaultValueDescription: false,
},
{
name: "listFilesOnly",
type: "boolean",
category: Diagnostics.Command_line_Options,
isCommandLineOnly: true,
description: Diagnostics.Print_names_of_files_that_are_part_of_the_compilation_and_then_stop_processing,
defaultValueDescription: false,
},
// Basic
targetOptionDeclaration,
moduleOptionDeclaration,
{
name: "lib",
type: "list",
element: {
name: "lib",
type: libMap,
defaultValueDescription: undefined,
},
affectsProgramStructure: true,
showInSimplifiedHelpView: true,
category: Diagnostics.Language_and_Environment,
description: Diagnostics.Specify_a_set_of_bundled_library_declaration_files_that_describe_the_target_runtime_environment,
transpileOptionValue: undefined,
},
{
name: "allowJs",
type: "boolean",
allowJsFlag: true,
affectsBuildInfo: true,
showInSimplifiedHelpView: true,
category: Diagnostics.JavaScript_Support,
description: Diagnostics.Allow_JavaScript_files_to_be_a_part_of_your_program_Use_the_checkJS_option_to_get_errors_from_these_files,
defaultValueDescription: false,
},
{
name: "checkJs",
type: "boolean",
affectsModuleResolution: true,
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
showInSimplifiedHelpView: true,
category: Diagnostics.JavaScript_Support,
description: Diagnostics.Enable_error_reporting_in_type_checked_JavaScript_files,
defaultValueDescription: false,
},
{
name: "jsx",
type: jsxOptionMap,
affectsSourceFile: true,
affectsEmit: true,
affectsBuildInfo: true,
affectsModuleResolution: true,
// The checker emits an error when it sees JSX but this option is not set in compilerOptions.
// This is effectively a semantic error, so mark this option as affecting semantic diagnostics
// so we know to refresh errors when this option is changed.
affectsSemanticDiagnostics: true,
paramType: Diagnostics.KIND,
showInSimplifiedHelpView: true,
category: Diagnostics.Language_and_Environment,
description: Diagnostics.Specify_what_JSX_code_is_generated,
defaultValueDescription: undefined,
},
{
name: "outFile",
type: "string",
affectsEmit: true,
affectsBuildInfo: true,
affectsDeclarationPath: true,
isFilePath: true,
paramType: Diagnostics.FILE,
showInSimplifiedHelpView: true,
category: Diagnostics.Emit,
description: Diagnostics.Specify_a_file_that_bundles_all_outputs_into_one_JavaScript_file_If_declaration_is_true_also_designates_a_file_that_bundles_all_d_ts_output,
transpileOptionValue: undefined,
},
{
name: "outDir",
type: "string",
affectsEmit: true,
affectsBuildInfo: true,
affectsDeclarationPath: true,
isFilePath: true,
paramType: Diagnostics.DIRECTORY,
showInSimplifiedHelpView: true,
category: Diagnostics.Emit,
description: Diagnostics.Specify_an_output_folder_for_all_emitted_files,
},
{
name: "rootDir",
type: "string",
affectsEmit: true,
affectsBuildInfo: true,
affectsDeclarationPath: true,
isFilePath: true,
paramType: Diagnostics.LOCATION,
category: Diagnostics.Modules,
description: Diagnostics.Specify_the_root_folder_within_your_source_files,
defaultValueDescription: Diagnostics.Computed_from_the_list_of_input_files,
},
{
name: "composite",
type: "boolean",
// Not setting affectsEmit because we calculate this flag might not affect full emit
affectsBuildInfo: true,
isTSConfigOnly: true,
category: Diagnostics.Projects,
transpileOptionValue: undefined,
defaultValueDescription: false,
description: Diagnostics.Enable_constraints_that_allow_a_TypeScript_project_to_be_used_with_project_references,
},
{
name: "tsBuildInfoFile",
type: "string",
affectsEmit: true,
affectsBuildInfo: true,
isFilePath: true,
paramType: Diagnostics.FILE,
category: Diagnostics.Projects,
transpileOptionValue: undefined,
defaultValueDescription: ".tsbuildinfo",
description: Diagnostics.Specify_the_path_to_tsbuildinfo_incremental_compilation_file,
},
{
name: "removeComments",
type: "boolean",
affectsEmit: true,
affectsBuildInfo: true,
showInSimplifiedHelpView: true,
category: Diagnostics.Emit,
defaultValueDescription: false,
description: Diagnostics.Disable_emitting_comments,
},
{
name: "noEmit",
type: "boolean",
showInSimplifiedHelpView: true,
category: Diagnostics.Emit,
description: Diagnostics.Disable_emitting_files_from_a_compilation,
transpileOptionValue: undefined,
defaultValueDescription: false,
},
{
name: "importHelpers",
type: "boolean",
affectsEmit: true,
affectsBuildInfo: true,
category: Diagnostics.Emit,
description: Diagnostics.Allow_importing_helper_functions_from_tslib_once_per_project_instead_of_including_them_per_file,
defaultValueDescription: false,
},
{
name: "importsNotUsedAsValues",
type: new Map(Object.entries({
remove: ImportsNotUsedAsValues.Remove,
preserve: ImportsNotUsedAsValues.Preserve,
error: ImportsNotUsedAsValues.Error,
})),
affectsEmit: true,
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
category: Diagnostics.Emit,
description: Diagnostics.Specify_emit_Slashchecking_behavior_for_imports_that_are_only_used_for_types,
defaultValueDescription: ImportsNotUsedAsValues.Remove,
},
{
name: "downlevelIteration",
type: "boolean",
affectsEmit: true,
affectsBuildInfo: true,
category: Diagnostics.Emit,
description: Diagnostics.Emit_more_compliant_but_verbose_and_less_performant_JavaScript_for_iteration,
defaultValueDescription: false,
},
{
name: "isolatedModules",
type: "boolean",
category: Diagnostics.Interop_Constraints,
description: Diagnostics.Ensure_that_each_file_can_be_safely_transpiled_without_relying_on_other_imports,
transpileOptionValue: true,
defaultValueDescription: false,
},
{
name: "verbatimModuleSyntax",
type: "boolean",
category: Diagnostics.Interop_Constraints,
description: Diagnostics.Do_not_transform_or_elide_any_imports_or_exports_not_marked_as_type_only_ensuring_they_are_written_in_the_output_file_s_format_based_on_the_module_setting,
defaultValueDescription: false,
},
// Strict Type Checks
{
name: "strict",
type: "boolean",
// Though this affects semantic diagnostics, affectsSemanticDiagnostics is not set here
// The value of each strictFlag depends on own strictFlag value or this and never accessed directly.
// But we need to store `strict` in builf info, even though it won't be examined directly, so that the
// flags it controls (e.g. `strictNullChecks`) will be retrieved correctly
affectsBuildInfo: true,
showInSimplifiedHelpView: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Enable_all_strict_type_checking_options,
defaultValueDescription: false,
},
{
name: "noImplicitAny",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
strictFlag: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Enable_error_reporting_for_expressions_and_declarations_with_an_implied_any_type,
defaultValueDescription: Diagnostics.false_unless_strict_is_set,
},
{
name: "strictNullChecks",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
strictFlag: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.When_type_checking_take_into_account_null_and_undefined,
defaultValueDescription: Diagnostics.false_unless_strict_is_set,
},
{
name: "strictFunctionTypes",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
strictFlag: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.When_assigning_functions_check_to_ensure_parameters_and_the_return_values_are_subtype_compatible,
defaultValueDescription: Diagnostics.false_unless_strict_is_set,
},
{
name: "strictBindCallApply",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
strictFlag: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Check_that_the_arguments_for_bind_call_and_apply_methods_match_the_original_function,
defaultValueDescription: Diagnostics.false_unless_strict_is_set,
},
{
name: "strictPropertyInitialization",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
strictFlag: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Check_for_class_properties_that_are_declared_but_not_set_in_the_constructor,
defaultValueDescription: Diagnostics.false_unless_strict_is_set,
},
{
name: "noImplicitThis",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
strictFlag: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Enable_error_reporting_when_this_is_given_the_type_any,
defaultValueDescription: Diagnostics.false_unless_strict_is_set,
},
{
name: "useUnknownInCatchVariables",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
strictFlag: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Default_catch_clause_variables_as_unknown_instead_of_any,
defaultValueDescription: Diagnostics.false_unless_strict_is_set,
},
{
name: "alwaysStrict",
type: "boolean",
affectsSourceFile: true,
affectsEmit: true,
affectsBuildInfo: true,
strictFlag: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Ensure_use_strict_is_always_emitted,
defaultValueDescription: Diagnostics.false_unless_strict_is_set,
},
// Additional Checks
{
name: "noUnusedLocals",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Enable_error_reporting_when_local_variables_aren_t_read,
defaultValueDescription: false,
},
{
name: "noUnusedParameters",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Raise_an_error_when_a_function_parameter_isn_t_read,
defaultValueDescription: false,
},
{
name: "exactOptionalPropertyTypes",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Interpret_optional_property_types_as_written_rather_than_adding_undefined,
defaultValueDescription: false,
},
{
name: "noImplicitReturns",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Enable_error_reporting_for_codepaths_that_do_not_explicitly_return_in_a_function,
defaultValueDescription: false,
},
{
name: "noFallthroughCasesInSwitch",
type: "boolean",
affectsBindDiagnostics: true,
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Enable_error_reporting_for_fallthrough_cases_in_switch_statements,
defaultValueDescription: false,
},
{
name: "noUncheckedIndexedAccess",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Add_undefined_to_a_type_when_accessed_using_an_index,
defaultValueDescription: false,
},
{
name: "noImplicitOverride",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
category: Diagnostics.Type_Checking,
description: Diagnostics.Ensure_overriding_members_in_derived_classes_are_marked_with_an_override_modifier,
defaultValueDescription: false,
},
{
name: "noPropertyAccessFromIndexSignature",
type: "boolean",
affectsSemanticDiagnostics: true,
affectsBuildInfo: true,
showInSimplifiedHelpView: false,
category: Diagnostics.Type_Checking,
description: Diagnostics.Enforces_using_indexed_accessors_for_keys_declared_using_an_indexed_type,
defaultValueDescription: false,
},
// Module Resolution
{
name: "moduleResolution",
type: new Map(Object.entries({
// N.B. The first entry specifies the value shown in `tsc --init`
node10: ModuleResolutionKind.Node10,
node: ModuleResolutionKind.Node10,
classic: ModuleResolutionKind.Classic,
node16: ModuleResolutionKind.Node16,
nodenext: ModuleResolutionKind.NodeNext,
bundler: ModuleResolutionKind.Bundler,
})),