zsh: update

PS: zprof rocks!

.config/zsh/env/gopath.zsh

@@ -0,0 +1,21 @@
+#!/bin/zsh
+
+z-gobin-fixup() {
+    (( ${+commands[go]} )) || return 0
+    local gobin
+    gobin=$(go env GOBIN)
+    if [ -z "${gobin}" ] ; then
+        local gopath
+        gopath=$(go env GOPATH)
+        [ -n "${gopath}" ] || return 1
+        [ -d "${gopath}" ] || return 0
+        gobin="${gopath}/bin"
+    fi
+    [ -d "${gobin}" ] || mkdir "${gobin}" || return 1
+    ## already in PATH?
+    [ "${path[(I)${gobin}]}" = 0 ] || return 0
+    path=( "${gobin}" ${path} )
+    hash -f
+}
+
+z-gobin-fixup