"Cannot find declaration to go to" for Go files

Could you check if:

• Go sdk is added in Settings (⌘ + , on macOS or Ctrl + Alt + S on Win/Linux) > Languages & Frameworks > GOROOT:

• Go home path is added in Settings (⌘ + , on macOS or Ctrl + Alt + S on Win/Linux) >Languages & Frameworks > GOPATH:

• .go extension is registered as Go files file type in Settings (⌘ + , on macOS or Ctrl + Alt + S on Win/Linux) > Editor > File Types:

• Right-click on the folder with source files in project window > Mark Directory as > Sources Root
• Try to invalidate caches File > Invalidate Caches.. > Invalidate and Restart

If you still cannot go to any variable/method declaration, if possible please provide your project sample so that we can reproduce the issue on our side. Also, your IDE log file (Help > Collect Logs and Diagnostic Data).
You can upload both the zipped project folder and log files here: https://uploads.jetbrains.com, and provide the uploaded file ID.

I have the same issue.  I've followed all of the steps above.  It seems to lack a certain “intelli”gence when it comes to understanding Go projects.

Ed Randall 
Could you please share a screenshot or screen recording showing the entire IDE window (especially project tree in a project tool window and file in the editor) when this issue occurs? Do you have the Go plugin installed and enabled? If possible, please share a sample project to try and reproduce the issue on our end?

Also, please restart the IDE, reproduce the issue and share your IDE logs (Help > Collect Logs and Diagnostic Data). They contain information about your environment and possibly some exceptions/errors related to the issue.

You can zip all of those files and upload them securely here: https://uploads.jetbrains.com, just provide the uploaded file ID.

Thanks - have solved this now.   It turned out to be an internal proxy problem.   Solution:

1. Ensure GOROOT, GOPATH etc configured as above
2. Settings > Languages & Frameworks > Go > Go Modules
   a) Tick “Enable Go modules integration”
   b) Environment: GOPROXY=https://atrifactory.ourdomain.com/artifactory/api/go/goproxy (this is the address of our internal artifact repository)
   c) Possibly also set HTTP_PROXY, HTTPS_PROXY and NO_PROXY environment variables (depending on corp. requirements)
    

The way to test/experiment & find the configuration needed was by running:

go list -modfile=go.mod -m all

Until HTTP_PROXY, HTTPS_PROXY, NO_PROXY and GOPROXY were correct, each dependency URL was printed with a “Bad Gateway” message.