fix: Args being reordered (#224)

Fixes #212

args/args.go

@@ -0,0 +1,100 @@
+package args
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/roboll/helmfile/state"
+)
+
+type argMap struct {
+	m     map[string]string
+	flags []string
+}
+
+func (a *argMap) SetArg(flag, arg string) {
+	if _, exists := a.m[flag]; !exists {
+		a.m[flag] = arg
+		a.flags = append(a.flags, flag)
+	}
+}
+
+func newArgMap() *argMap {
+	return &argMap{m: map[string]string{}}
+}
+
+func GetArgs(args string, state *state.HelmState) []string {
+	//args := c.String("args")
+	argsMap := newArgMap()
+	spaceflagArg := map[string]bool{}
+
+	if len(args) > 0 {
+		argsVals := strings.Split(args, " ")
+		prevFlag := ""
+		for _, arg := range argsVals {
+			if strings.HasPrefix(arg, "--") {
+				argVal := strings.SplitN(arg, "=", 2)
+				if len(argVal) > 1 {
+					arg := argVal[0]
+					value := argVal[1]
+					argsMap.SetArg(arg, value)
+				} else {
+					argsMap.SetArg(arg, "")
+				}
+				prevFlag = arg
+			} else {
+				spaceflagArg[prevFlag] = true
+				argsMap.m[prevFlag] = arg
+			}
+		}
+	}
+
+	if len(state.HelmDefaults.Args) > 0 {
+		for _, arg := range state.HelmDefaults.Args {
+			var flag string
+			var val string
+
+			argsNum, _ := fmt.Sscanf(arg, "--%s %s", &flag, &val)
+			if argsNum == 2 {
+				argsMap.SetArg(flag, arg)
+			} else {
+				argVal := strings.SplitN(arg, "=", 2)
+				argFirst := argVal[0]
+				if len(argVal) > 1 {
+					val = argVal[1]
+					argsMap.SetArg(argFirst, val)
+				} else {
+					argsMap.SetArg(argFirst, "")
+				}
+			}
+		}
+	}
+
+	if state.HelmDefaults.TillerNamespace != "" {
+		argsMap.SetArg("--tiller-namespace", state.HelmDefaults.TillerNamespace)
+	}
+	if state.HelmDefaults.KubeContext != "" {
+		argsMap.SetArg("--kube-context", state.HelmDefaults.KubeContext)
+	}
+
+	var argArr []string
+
+	for _, flag := range argsMap.flags {
+		val := argsMap.m[flag]
+
+		if val != "" {
+			if spaceflagArg[flag] {
+				argArr = append(argArr, fmt.Sprintf("%s %s", flag, val))
+			} else {
+				argArr = append(argArr, fmt.Sprintf("%s=%s", flag, val))
+			}
+
+		} else {
+			argArr = append(argArr, fmt.Sprintf("%s", flag))
+		}
+	}
+
+	state.HelmDefaults.Args = argArr
+
+	return state.HelmDefaults.Args
+}