fix(run-pipeline-node): update args with mounted path on Windows

The Emscripten virtual filesystem, which is used by the Wasm processing
piplen, mounted path does not match the Windows path that is mounted.
Update the arguments accordingly.

Author: thewtex

packages/core/typescript/itk-wasm/src/pipeline/run-pipeline-node.ts

@@ -1,3 +1,5 @@
+import path from 'path'
+
 import loadEmscriptenModuleNode from './internal/load-emscripten-module-node.js'
 import runPipelineEmscripten from './internal/run-pipeline-emscripten.js'
 
@@ -6,7 +8,38 @@ import PipelineOutput from './pipeline-output.js'
 import PipelineInput from './pipeline-input.js'
 import RunPipelineResult from './run-pipeline-result.js'
 
-async function runPipelineNode (
+function windowsToEmscriptenPath(filePath: string): string {
+  // Following mount logic in itkJSPost.js
+  const fileBasename = path.basename(filePath)
+  const containingDir = path.dirname(filePath)
+  let mountedPath = '/'
+  const splitPath = containingDir.split(path.sep)
+  for (let ii = 1; ii < splitPath.length; ii++) {
+    mountedPath += splitPath[ii]
+    mountedPath += '/'
+  }
+  mountedPath += fileBasename
+  return mountedPath
+}
+
+function replaceArgumentsWithEmscriptenPaths(
+  args: string[],
+  mountDirs: Set<string>
+): string[] {
+  if (typeof process === 'undefined' || process.platform !== 'win32') {
+    return args
+  }
+  return args.map((arg) => {
+    for (const mountDir of mountDirs) {
+      if (arg.startsWith(mountDir)) {
+        return windowsToEmscriptenPath(arg)
+      }
+    }
+    return arg
+  })
+}
+
+async function runPipelineNode(
   pipelinePath: string,
   args: string[],
   outputs: PipelineOutput[],
@@ -22,6 +55,9 @@ async function runPipelineNode (
       mountedDirs.add(Module.mountDir(dir))
     })
   }
+  if (typeof mountDirs !== 'undefined') {
+    args = replaceArgumentsWithEmscriptenPaths(args, mountDirs)
+  }
   const result = runPipelineEmscripten(Module, args, outputs, inputs)
   if (typeof mountDirs !== 'undefined') {
     mountedDirs.forEach((dir) => {