Go CLI Modules and Workspaces

go mod init example.com/myapp

# Create a new go.mod for the current project.

go mod tidy

# Add missing and remove unused module requirements.

go mod download

# Pre-fetch required modules into the module cache.

go mod graph

# Show the module dependency graph.

go mod why -m github.com/pkg/errors

# Show why a package or module is needed.

go mod edit -replace example.com/lib=../lib

# Point a module dependency to a local checkout.

go mod edit -require example.com/lib@v1.2.3

# Add an explicit module requirement.

go mod edit -go=1.25

# Set the minimum Go version in go.mod.

go mod vendor

# Copy dependencies into a vendor directory.

go list -m -json

# Inspect current module metadata.

go get example.com/lib@latest

# Update a dependency to the latest version.

go get -u=patch ./...

# Update a dependency within its compatible patch/minor range.

go list -m -u all

# Show modules that have newer versions available.

go mod verify

# Verify dependencies in module cache against go.sum.

go mod edit -exclude example.com/lib@v1.2.4

# Exclude a dependency version from selection.

go env -w GOPRIVATE=github.com/myorg/*

# Mark private module path patterns.

go env -w GONOPROXY=github.com/myorg/*

# Bypass proxy for selected module path patterns.

go env -w GONOSUMDB=github.com/myorg/*

# Skip checksum database for selected private modules.

go env -w GOVCS=github.com:git,private:all

# Restrict version control systems used for module fetches.

go work init

# Create a go.work file for multiple local modules.

go work use ./app ./lib

# Add one or more modules to go.work.

go work edit -json

# Inspect go.work configuration as JSON.

go work sync

# Sync workspace dependencies back to module go.mod files.

go work use -r .

# Add modules under a tree recursively.