1 files changed, 35 insertions, 29 deletions

diff --git a/pkg/server/env/env.go b/pkg/server/env/env.go
index b75d9a8..2c97669 100644
--- a/pkg/server/env/env.go
+++ b/pkg/server/env/env.go
@@ -10,11 +10,11 @@ import (
 type env struct {
 	m map[string]string
 	sync.Mutex
+	p *env
 }
 
 type Env struct {
 	*env
-	p *env
 }
 
 const namePattern = "[a-zA-Z][a-zA-Z0-9.]*"
@@ -30,15 +30,15 @@ func New() Env {
 	return Env{env: new(env)}
 }
 
-func (e *env) init() {
+func (e Env) init() {
 	if e.m == nil {
 		e.m = make(map[string]string)
 	}
 }
 
-func (e *env) Fork() Env {
+func (e Env) Fork() Env {
 	t := New()
-	t.p = e
+	t.p = e.env
 	return t
 }
 
@@ -47,12 +47,7 @@ func (e *env) Find(key string) (string, bool) {
 	defer e.Unlock()
 
 	v, ok := e.m[key]
-
-	return v, ok
-}
-
-func (e Env) Find(key string) (string, bool) {
-	if v, ok := e.env.Find(key); ok {
+	if ok {
 		return v, ok
 	}
 
@@ -68,11 +63,6 @@ func (e Env) Get(key string) string {
 	return v
 }
 
-func (e Env) Has(key string) bool {
-	_, ok := e.Find(key)
-	return ok
-}
-
 func validKeyValue(key string, value string) error {
 	if !isGoodName(key) {
 		return errBadVariable
@@ -119,7 +109,7 @@ func (e Env) Push(key string, value string) error {
 	return nil
 }
 
-func (e *env) Del(key string) bool {
+func (e Env) Del(key string) bool {
 	e.Lock()
 	defer e.Unlock()
 
@@ -136,7 +126,7 @@ func (e *env) Del(key string) bool {
 	return true
 }
 
-func (e *env) Each(f func(string, string) bool) {
+func (e Env) Each(f func(string, string) bool) {
 	var keys []string
 
 	e.Lock()
@@ -155,7 +145,7 @@ func (e *env) Each(f func(string, string) bool) {
 	}
 }
 
-func (e *env) Clear() {
+func (e Env) Clear() {
 	e.Lock()
 	defer e.Unlock()
 
@@ -163,10 +153,22 @@ func (e *env) Clear() {
 }
 
 func (e Env) replaceWith(r *regexp.Regexp, s string, f func(string) string) string {
-	for {
-		t := r.ReplaceAllStringFunc(s, f)
+	const maxIter = 16
+
+	for iter := 0; ; iter++ {
+		found := false
+
+		t := r.ReplaceAllStringFunc(s, func(v string) string {
+			found = true
+
+			if iter >= maxIter {
+				return ""
+			}
+
+			return f(v)
+		})
 
-		if t == s {
+		if !found && t == s {
 			break
 		}
 
@@ -194,18 +196,22 @@ func (e Env) EvalStrings(s []string) []string {
 	return t
 }
 
+func (e Env) getLocal(key string) string {
+	if tunnel, ok := e.Find("tunnel"); ok {
+		if v, ok := e.Find("tunnel." + tunnel + "." + key); ok {
+			return v
+		}
+	}
+
+	return e.Get(key)
+}
+
 func (e Env) Expand(s string) string {
 	return e.replaceWith(expandRe, s, func(v string) string {
-		return e.Get(v[2 : len(v)-1])
+		return e.getLocal(v[2 : len(v)-1])
 	})
 }
 
 func (e Env) Value(key string) string {
-	if e.Has("tunnel") {
-		if v := e.Expand("@[tunnel.@[tunnel]." + key + "]"); v != "" {
-			return v
-		}
-	}
-
-	return e.Expand(e.Get(key))
+	return e.Expand(e.getLocal(key))
 }