wails: Cross compilation using xgo does not copy local (unpublished) packages

Description

I’ve been trying to cross compile for windows from my Linux machine and ran into an issue. I have a go module in a different directory than the one in which my wails project is located—I import this module in a go.mod file in my wails project directory using the replace keyword. When I try to compile, I get the following message:

Compiling for windows-4.0/amd64...
go: github.com/username/projectname/client@v0.0.0-00010101000000-000000000000: parsing /home/dk/go/src/github.com/username/projectname/client/go.mod: open /home/dk/go/src/github.com/username/projectname/client/go.mod: no such file or directory

I suspect that the output is from the Docker container, and that the necessary files are not being copied in.

To Reproduce Steps to reproduce the behaviour:

Import a local go module outside the immediate project directory using go modules’ replace keyword from within the go.mod of your wails project directory.
Run wails build -x windows/amd64 --verbose. The error described above should appear.
Wails will claim that the project built successfully, but the build folder will be empty.

Expected behaviour The cross-compilation builds a functioning windows executable.

System Details

Name	Value
Wails Version	v1.7.1
Go Version	go1.14.2
Platform	linux
Arch	amd64
GO111MODULE	(Not Set)
GCC	7.5.0
Npm	6.14.4
Node	v12.17.0

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 25 (19 by maintainers)

Most upvoted comments

@DanielKrolopp Would you mind checking out the feature branch feature/goroot I just pushed up that allows you to specify the -goroot flag and provide the location on your drive of the GOROOT environment value?

Passing that in causes the location on your host to be mounted at /go inside the cross-compiler container. This should enable a replace github.com/wailsapp/wails => github.com/DanielKrolopp/wails style of substitution.

| |     / /___ _(_) /____
| | /| / / __ `/ / / ___/
| |/ |/ / /_/ / / (__  )  v1.8.0
|__/|__/\__,_/_/_/____/   https://wails.app
The lightweight framework for web-like apps

wails build - Builds your Wails project

This command will check to ensure all pre-requistes are installed prior to building. If not, it will attempt to install them. Building comprises of a number of steps: install frontend dependencies, build frontend, pack frontend, compile main application.

Flags:

  -d	Build in Debug mode
  -f	Force rebuild of application components
  -goroot string
    	Specify your goroot location. Mounted to /go during cross-compilation.
  -help
    	Get help on the 'wails build' command.
  -ldflags string
    	Extra options for -ldflags
  -p	Package application on successful build
  -t string
    	Generate Typescript definitions to given file (at runtime)
  -verbose
    	Verbose output
  -x string
    	Cross-compile application to specified platform via xgo
    	 - darwin/amd64
    	 - linux/amd64
    	 - linux/arm-7
    	 - windows/amd64

Example:

wails build -x windows/amd64 -goroot ~/go

tmclane on Sep 10, 2020

Was this solved? Do we need to merge in the fixes on the branch?

It was merged to develop. I don’t know if we have cut a release yet containing it.

tmclane on Oct 15, 2020

I think I have a solution for this. Please bear with us 😃

leaanthony on Aug 29, 2020

Another user reported this on slack: using replace in go.mod will also fail cross-compile:

// go.mod
require (
  ...
  ...
  github.com/Me/myproject v0.1.0
)
replace github.com/Me/myproject => ../myproject

leaanthony on Jul 22, 2020