Using hookFunction via electron-winstaller

[beyondkmp]

Description

Set the hookFunction to pass our own sign function for customized signing.

Expected

Signing successful

Result
Signing failed

  ⨯ Failed with exit code: 4294967295
Output:
System.AggregateException: One or more errors occurred. ---> System.Exception: Failed to sign, command invoked was: 'D:\a\element-desktop\element-desktop\node_modules\electron-winstaller\vendor\signtool.exe sign windows-sign C:\Users\runneradmin\AppData\Local\SquirrelTemp\tempa\lib\net45\Element Nightly_ExecutionStub.exe'
   at Squirrel.Update.Program.<signPEFile>d__17.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
...

Does the Windows installer support hookFunction? If not, is it possible to add support for it?

Why is hookFunction needed

In Electron Builder, many signing algorithms are implemented (for example, Azure Pipelines, or signing as part of a pipeline for other files to be signed). If hookFunction is supported, these signing functions can be directly passed through. However, if it's not supported, users would need to re-implement these functions themselves and pass them via hookModulePath. This places higher demands on the users and results in redundant implementation.

Refer
electron-userland/electron-builder#8854

[widavies]

I'm getting this error as well, but I have a suspicion that it might be that 'C:\Users\runneradmin\AppData\Local\SquirrelTemp\tempa\lib\net45\Element Nightly_ExecutionStub.exe' is not present/removed before it can be signed.

The reason I suspect this is because we shim signtool with a custom CLI that handles some things specific to our company. It is being correctly invoked, but throws the following error:

SignTool Error: File not found: C:\actions-runner\_work\dir\squirrel-temp\tempa\lib\net45\***_ExecutionStub.exe

It could be both issues, but something to double check is that ***ExecutionStub.exe is actually present.