Create set-env.bash (#147)

* Create set-env.bash
* Update README.md

README.md

@@ -39,6 +39,10 @@ To set `GOROOT` in your shell's initialization add the following:
 Add this to your env.nu
 `source ('~/.asdf/plugins/golang/set-env.nu')`
 
+**bash shell**
+Add this to your .bashrc:
+`. ~/.asdf/plugins/golang/set-env.bash` 
+
 ## When using `go get` or `go install`
 
 After using `go get` or `go install` to install a package you need to run `asdf reshim golang` to get any new shims.

set-env.bash

@@ -0,0 +1,17 @@
+asdf_update_golang_env() {
+  local go_bin_path
+  go_bin_path="$(asdf which go 2>/dev/null)"
+  if [[ -n "${go_bin_path}" ]]; then
+    abs_go_bin_path="$(readlink -f "${go_bin_path}")"
+
+    export GOROOT
+    GOROOT="$(dirname "$(dirname "${abs_go_bin_path}")")"
+
+    export GOPATH
+    GOPATH="$(dirname "${GOROOT}")/packages"
+
+    export GOBIN
+    GOBIN="$(dirname "${GOROOT}")/bin"
+  fi
+}
+asdf_update_golang_env