File tree

# build result
/bin

# bootstrap result
/bin/gb
/bin/gb-vendor

# build result
/bin/BINARY_NAME

# wrapper
/scripts/gb.sh

/src # golang source code

# golang source of executables
/src/cmd

 # source code BINARY_NAME
 # import ("libname")
 # import ("github.com/A/B")
/src/cmd/BINARY_NAME/main.go

# source code of libname
src/libname 

# vendor dependencies
/vendor/ 

# ./scipts/gb vendor fetch github.com/A/B
/vendor/src/github.com/A/B

# gb itself
/vendor/src/github.com/constabulary/gb

gb.sh

#!/bin/bash

export ROOT=$(dirname $(dirname ${BASH_SOURCE[0]}))
export PATH=${PATH}:${ROOT}/bin

cd ${ROOT}
make bin/gb

gb "$@"

Makefile

GB := $(CURDIR)/scripts/gb.sh
GO_ENV := GOPATH=$(CURDIR):$(CURDIR)/vendor

# gb
vendor/bin/gb:
	@echo "[bootstrap] $(@F)"
	@mkdir -p "$(@D)"
	@(cd $(CURDIR)/vendor/src/github.com/constabulary/gb && GOPATH=$(CURDIR)/vendor go install ./cmd/...)

bin/gb: vendor/bin/gb
	@mkdir -p "$(@D)"
	@cp $(CURDIR)/vendor/bin/gb $(CURDIR)/bin/gb
	@cp $(CURDIR)/vendor/bin/gb-vendor $(CURDIR)/bin/gb-vendor

fmt:
	@echo "[go] fmt"
	@gofmt -l -s -w -- src

vet:
	@echo "[go] vet"
	@(cd $(CURDIR) && $(GO_ENV) go vet ./src/cmd/... ./src/lib/...)

build: bin/gb fmt vet
	@echo "[build] golang"
	@(cd $(CURDIR) && $(GB) build ...)