Merge pull request #12 from rancher/use-docker-sdk

Replace docker commands with docker sdk

Makefile

@@ -10,13 +10,16 @@ ifeq ($(GIT_TAG),)
 GIT_TAG   := $(shell git describe --always)
 endif
 
+# get latest k3s version
+K3S_TAG		:= $(shell curl --silent "https://api.github.com/repos/rancher/k3s/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
+
 # Go options
 GO        ?= go
 PKG       := $(shell go mod vendor)
 TAGS      :=
 TESTS     := .
 TESTFLAGS :=
-LDFLAGS   := -w -s -X github.com/rancher/k3d/version.Version=${GIT_TAG}
+LDFLAGS   := -w -s -X github.com/rancher/k3d/version.Version=${GIT_TAG} -X github.com/rancher/k3d/version.K3sVersion=${K3S_TAG}
 GOFLAGS   :=
 BINDIR    := $(CURDIR)/bin
 BINARIES  := k3d

README.md

@@ -46,8 +46,7 @@ Example Workflow: Create a new cluster and use it with `kubectl`
 
 ## TODO
 
-- [ ] Use the docker client library instead of commands
-- [ ] Test the docker version
-- [ ] Improve cluster state management
+- [x] Use the docker client library instead of commands
+- [x] Improve cluster state management
+- [x] Add install script
 - [ ] Use [sirupsen/logrus](https://github.com/sirupsen/logrus) for prettier logs
-- [ ] Add install script