Why Packages Are Not Found When you run go run main.go inside the api folder, Go can't resolve imports because the project is not properly set up with Go Modules.

What to do:

Check for a go.mod file in the root directory. If it doesn't exist, you need to initialize the module:

bash Copy Edit go mod init myapp Replace myapp with the name of your module.

Ensure that dependencies are properly listed in the go.mod file. If not, run:

bash Copy Edit go mod tidy Fix import paths in the code:

If the api folder is the root of your project, imports should use the module name (e.g., myapp/package1).

Specifying Packages in go run To run your application, use the go run command at the root of the module (where go.mod resides):

bash Copy Edit go run ./api/main.go If dependencies are missing or not found, ensure go mod tidy is run to download and set them up.

Is This a Good Practice? The structure you described is not recommended for modern Go development. The current best practice for Go projects is to use a flat and simple structure with Go Modules.

Recommended Structure:

css Copy Edit |-MyApp |--api/ # Application code |----main.go # Entry point |----package1/ # Sub-packages |----package2/ # Sub-packages |--go.mod # Go Modules file |--go.sum # Dependency checksums Key Points:

Go Modules:

Dependencies are managed via go.mod and go.sum. No need to include src, github.com, golang.org, or gopkg.in in your repo. Flat Structure:

Avoid unnecessary nesting (src or bin folders are redundant for most projects). Keep code and dependencies clearly separated. Imports:

Use proper module-based imports. For example: If your module is myapp, import packages as myapp/package1. Steps to Refactor the Project Move the api folder to the root of the repository:

go Copy Edit MyApp/ ├── api/ ├── go.mod Initialize the module (if not done yet):

bash Copy Edit go mod init myapp go mod tidy Update all imports in your code to use the module name:

go Copy Edit // Instead of this: import "package1" // Use: import "myapp/package1" Run the application:

bash Copy Edit go run ./api/main.go Why Modules are Better No Manual Dependency Management: Go Modules fetch and manage dependencies automatically. Portable and Clean: Your repo only needs your code (api folder), go.mod, and go.sum. No vendor directories or dependency code.