feat(bindgen): export used interface types

Closes #920

packages/compare-images/typescript/src/index-node.ts

@@ -11,4 +11,7 @@ import compareDoubleImagesNode from './compare-double-images-node.js'
 export { compareDoubleImagesNode }
 
 import compareImagesNode from './compare-images-node.js'
-export { compareImagesNode }
+export { compareImagesNode }
+
+export type { Image } from 'itk-wasm'
+export type { JsonCompatible } from 'itk-wasm'

packages/compare-images/typescript/src/index.ts

@@ -14,4 +14,7 @@ import compareDoubleImages from './compare-double-images.js'
 export { compareDoubleImages }
 
 import compareImages from './compare-images.js'
-export { compareImages }
+export { compareImages }
+
+export type { Image } from 'itk-wasm'
+export type { JsonCompatible } from 'itk-wasm'

packages/compress-stringify/typescript/src/index-node.ts

@@ -20,3 +20,5 @@ export type { ParseStringDecompressOptions }
 
 import parseStringDecompressNode from './parse-string-decompress-node.js'
 export { parseStringDecompressNode }
+
+export type { BinaryStream } from 'itk-wasm'

packages/compress-stringify/typescript/src/index.ts

@@ -22,3 +22,5 @@ export type { ParseStringDecompressOptions }
 
 import parseStringDecompress from './parse-string-decompress.js'
 export { parseStringDecompress }
+
+export type { BinaryStream } from 'itk-wasm'

packages/dicom/typescript/src/index-node.ts

@@ -60,3 +60,8 @@ export type { ReadImageDicomFileSeriesOptions }
 
 import readImageDicomFileSeriesNode from './read-image-dicom-file-series-node.js'
 export { readImageDicomFileSeriesNode }
+
+export type { JsonCompatible } from 'itk-wasm'
+export type { Image } from 'itk-wasm'
+export type { BinaryStream } from 'itk-wasm'
+export type { TextStream } from 'itk-wasm'

packages/dicom/typescript/src/index.ts

@@ -63,3 +63,8 @@ export { readImageDicomFileSeries }
 
 import readImageDicomFileSeriesWorkerFunction from './read-image-dicom-file-series-worker-function.js'
 export { readImageDicomFileSeriesWorkerFunction }
+
+export type { JsonCompatible } from 'itk-wasm'
+export type { Image } from 'itk-wasm'
+export type { BinaryStream } from 'itk-wasm'
+export type { TextStream } from 'itk-wasm'

src/bindgen/typescript/function-module.js

@@ -385,7 +385,7 @@ function functionModule (srcOutputDir, forNode, interfaceJson, modulePascalCase,
   functionContent += `}\n\nexport default ${moduleCamelCase}${nodeTextCamel}\n`
   writeIfOverrideNotPresent(path.join(srcOutputDir, `${moduleKebabCase}${nodeTextKebab}.ts`), functionContent)
 
-  return { readmeFunction }
+  return { readmeFunction, usedInterfaceTypes }
 }
 
 export default functionModule

src/bindgen/typescript/typescript-bindings.js

@@ -39,6 +39,7 @@ function typescriptBindings (outputDir, buildDir, wasmBinaries, options, forNode
   let demoFunctionsHtml = ''
   let pipelinesFunctionsTabs = ''
   let demoFunctionsTypeScript = ''
+  const allUsedInterfaceTypes = new Set()
 
   const packageName = options.packageName
   const bundleName = packageToBundleName(packageName)
@@ -129,7 +130,8 @@ function typescriptBindings (outputDir, buildDir, wasmBinaries, options, forNode
       indexContent += `export type { ${modulePascalCase}Options }\n\n`
     }
 
-    const { readmeFunction } = functionModule(srcOutputDir, forNode, interfaceJson, modulePascalCase, moduleKebabCase, moduleCamelCase, nodeTextCamel, nodeTextKebab, haveOptions)
+    const { readmeFunction, usedInterfaceTypes } = functionModule(srcOutputDir, forNode, interfaceJson, modulePascalCase, moduleKebabCase, moduleCamelCase, nodeTextCamel, nodeTextKebab, haveOptions)
+    usedInterfaceTypes.forEach(iType => allUsedInterfaceTypes.add(iType))
 
     indexContent += `import ${moduleCamelCase}${nodeTextCamel} from './${moduleKebabCase}${nodeTextKebab}.js'\n`
     indexContent += `export { ${moduleCamelCase}${nodeTextCamel} }\n`
@@ -139,6 +141,11 @@ function typescriptBindings (outputDir, buildDir, wasmBinaries, options, forNode
     readmePipelines += readmeResult
   })
 
+  if (allUsedInterfaceTypes.size > 0) {
+    indexContent += '\n'
+    allUsedInterfaceTypes.forEach(iType => indexContent += `export type { ${iType} } from 'itk-wasm'\n`)
+  }
+
   readmeInterface += `  setPipelinesBaseUrl,
   getPipelinesBaseUrl,
   setPipelineWorkerUrl,