How to I get the moduleName for each SourceFile?

[ctaggart]

Is there a way to get the moduleNames for a SourceFile? They are all showing up as uknown when I do this?
http://www.typescriptlang.org/docs/handbook/module-resolution.html

import * as ts from "typescript";
import * as fs from "fs";
// import {isTypeReference, isClassDeclaration} from "tsutils";

const tsPath = "node_modules/@types/mocha/index.d.ts"
const options: ts.CompilerOptions = { target: ts.ScriptTarget.ES2015 }
const host = ts.createCompilerHost(options, true);
const program = ts.createProgram([tsPath], options, host)
const checker = program.getTypeChecker()

for (const sf of program.getSourceFiles()){
    console.log(sf.fileName + ": " + sf.moduleName)
}

C:\Users\camer\ts\TsAst [moduleName +1 ~0 -0 !]> node .\modulename.js
C:/Users/camer/ts/TsAst/node_modules/typescript/lib/lib.es6.d.ts: undefined
node_modules/@types/mocha/index.d.ts: undefined
C:/Users/camer/ts/TsAst/node_modules/@types/node/inspector.d.ts: undefined
C:/Users/camer/ts/TsAst/node_modules/@types/node/index.d.ts: undefined

[ajafff]

SourceFile.moduleName is only preset for AMD modules.

Can you describe which information you are trying to get from this property?

[ctaggart]

I want to generate import statements for each of the exports. To correctly generate imports, I need to know the module name and the name of the item being exported. Here, I'm trying to get mocha as the moduleName.

[ctaggart]

I can string split on /, I just thought there may be a way to get it from the API.

[ajafff]

I'm afraid there is no ready-to-use solution. You need to use fileName and try to find an algorithm that works for all cases.

I'd suggest:

• find the last node_modules in the name
• if the directory after node_modules starts with an @, it's a scoped package -> use the next directory name, too
• if the scope is @types, remove it
  • according to Resolve types for a package @foo/bar at @types/foo__bar microsoft/TypeScript#14819 you need to convert the second directory name as well if it is a scoped package
  • @types/slack__client -> @slack/client
• you probably need some special handling for submodule imports
  • for example @angular/common/http is not exported from @angular/common
  • you probably need to read the package.json's main property to get this right

[ctaggart]

Thanks, I'll give that a shot.