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Is it possible to debug go revel framework from Visual Studio Code?

I'm trying to debug a revel app with visual studio but I can't get it to work.

I've seen this question how to debug revel framework(golang) application in visual studio code(vscode) but no answers yet...

I've tried with this config:

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Launch",
      "type": "go",
      "request": "launch",
      "mode": "debug",
      "remotePath": "",
      "port": 2345,
      "host": "127.0.0.1",
      "program": "~/code/go/bin/revel",
      "env": {},
      "args": [],
      "showLog": true
    }
  ]
}

But I'm getting this error: Failed to continue: "The program attribute must point to valid directory, .go file or executable."

I think it must be the rebel binary the one to be run here, but I don't know how to pass the app path, should it go in "args"?

like image 923
zapico Avatar asked Mar 08 '23 20:03

zapico


1 Answers

Yes it's possible.

  1. Suppose that the GOPATH is C:\Work\golang
  2. Revel project name is myapp, thus the location of the project (workspace) will be C:\Work\golang\src\myapp.
  3. Make some changes to the controllers etc...
  4. Run the application with revel run myapp, then press CTRL+C to exit. This step is necessary to generate corresponding go files. The generated file, i.e. the main package will be available under ${workspaceRoot}/app/tmp/main.go
  5. Configure launch.json as follows:

    {
        "version": "0.2.0",
        "configurations": [
            {
                "name": "Launch",
                "type": "go",
                "request": "launch",
                "mode": "debug",
                "remotePath": "",
                "port": 2345,
                "host": "127.0.0.1",
                "env": {},
                "showLog": true,
                "program": "${workspaceRoot}/app/tmp/",
                "args": ["-importPath", "myapp", "-srcPath", "c:\\work\\golang\\src",  "-runMode", "dev"]
            }
        ]
    }
    
  6. The important parts are program and args parameters, while the other parameters are unmodified.

  7. Set breakpoint and start the delve debugger...

Debug revel application

EDIT:

  1. Setting args parameter to ["-importPath", "myapp", "-srcPath", "${workspaceRoot}/..", "-runMode", "dev"] also work, and I think this should work in other platforms (Mac, Linux) too.
  2. The error message is related to delve issue. See https://github.com/Microsoft/vscode-go/issues/986
like image 184
putu Avatar answered Apr 28 '23 12:04

putu