# ye command internally bohot kuch karta hai:
go build ./...
# 1. go.mod padha
# 2. dependencies resolve kiye
# 3. module cache check kiya
# 4. compiler chalaya
# 5. linker chalaya

go build [packages]    # Compile karo, binary banao
go run [files]         # Compile + run (temp binary)
go install [packages]  # Compile + binary ko GOBIN mein daalo
go generate            # Code generators chalao

go test [packages]           # Tests chalao
go test -v ./...             # Verbose output
go test -cover ./...         # Coverage dekho
go test -bench=. ./...       # Benchmarks chalao
go test -race ./...          # Race condition detect karo

go mod init [path]    # Naya module banao
go mod tidy           # go.mod clean karo
go mod download       # Dependencies pre-download karo
go mod vendor         # vendor/ folder banao
go mod graph          # Dependency graph print karo
go mod verify         # Module cache integrity check
go mod why [pkg]      # Koi package kyun include hai?
go mod edit [flags]   # go.mod programmatically edit karo

go fmt ./...     # Code format karo (gofmt wrap)
go vet ./...     # Suspicious code detect karo
go fix ./...     # Old API → new API migrate karo
go doc [symbol]  # Documentation dekho

go env              # Saare Go environment variables
go env GOPATH       # Specific variable
go env -w KEY=val   # Permanently set karo
go version          # Go version
go version -m ./bin/app  # Binary kaise build hua?

# Output file ka naam do
go build -o myapp ./cmd/server
 
# Build info embed karo (debugging ke liye)
go build -ldflags="-X main.version=v1.2.3" .
 
# Race condition detector on
go build -race .
 
# Specific OS/Arch ke liye cross-compile
GOOS=linux GOARCH=amd64 go build -o app-linux .
GOOS=windows GOARCH=amd64 go build -o app.exe .
GOOS=darwin GOARCH=arm64 go build -o app-mac .  # Apple Silicon
 
# Verbose output (kaun se files compile ho rahe hain)
go build -v ./...
 
# Build cache use mat karo
go build -a ./...
 
# Trimpath — build artifacts se local paths hatao
go build -trimpath .
 
# Build tags ke saath
go build -tags "production,linux" .

# Module-aware mode force karo
GO111MODULE=on go build .
 
# GOPATH mode force karo (legacy)
GO111MODULE=off go build .
 
# Auto (module-aware if go.mod present)
GO111MODULE=auto go build .

# go.mod automatically update karo (missing packages add karo)
go build -mod=mod .
 
# go.mod change mat karo, agar change chahiye toh error do
go build -mod=readonly .   # default since Go 1.16
 
# vendor/ directory use karo (network mat use karo)
go build -mod=vendor .

# Latest version install karo (go.mod ko affect nahi karta)
go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
 
# Specific version
go install golang.org/x/tools/gopls@v0.14.0
 
# Current module ka tool install karo
go install ./cmd/myapp

# Single file
go run main.go
 
# Multiple files (same package)
go run main.go helper.go
 
# Current package
go run .
 
# Arguments pass karo
go run . --port=8080 --debug

# go.mod mein declare kiye tools run karo
go tool stringer -type=Color
 
# pprof profiler
go tool pprof cpu.prof
 
# Compiled package ka assembly dekho
go tool objdump -s main.main ./myapp
 
# Test coverage HTML
go test -coverprofile=c.out ./...
go tool cover -html=c.out

# Proxy set karo (private network ke liye)
go env -w GOPROXY=https://goproxy.cn,direct
 
# Private modules
go env -w GOPRIVATE=*.company.com
 
# GOPATH change karo
go env -w GOPATH=/custom/gopath
 
# Undo karo
go env -u GOPROXY

mkdir myproject && cd myproject
go mod init github.com/username/myproject
# main.go banao...
go run .

git clone https://github.com/someone/project
cd project
go mod download  # sabhi dependencies download karo
go build ./...   # sab kuch compile karo
go test ./...    # sab tests chalao

CGO_ENABLED=0 \
  GOOS=linux \
  GOARCH=amd64 \
  go build -ldflags="-s -w -X main.version=$(git describe --tags)" \
  -trimpath \
  -o dist/app \
  ./cmd/server