Go: go.mod file not found - module not initialized
go: cannot find main module, but found .git/config in /home/user/project
go: to create a module, run `go mod init`
Immediate Remediation
bash
go mod init <module-name>
Root Cause Analysis
The Go toolchain requires a go.mod file to define the module root. When running `go run` or `go build` outside a module, it fails because it cannot determine the module context. The presence of a .git directory suggests the project is version-controlled but not yet initialized as a Go module.
Verification & Guardrails
- Choose a module path that matches the repository URL (e.g., github.com/user/project) to avoid import path issues.
- After running `go mod init`, run `go mod tidy` to add missing dependencies.
- If you are intentionally working outside a module, set GO111MODULE=off to use GOPATH mode, but this is deprecated.
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