change condition to discover version

Author: yogo1212

defaults/main.yml

@@ -1,4 +1,8 @@
 ---
+# (TODO defaults->documentation)
+# this overrides version discovery using github releases
+#go_version: "1.10"
+
 # mirror for Go release tarballs
 go_mirror: "https://storage.googleapis.com/golang/"
 
@@ -7,7 +11,6 @@ go_mirror: "https://storage.googleapis.com/golang/"
 # if they are ALL not set, version will be autodiscovered.
 #   the version will be found thanks to github releases.
 #   the shasum will be fetched from "{{ go_download_location }}/{{ go_tarball }}.sha256"
-#go_version: "1.7.1"
 #go_tarball: "go{{ go_version }}.linux-amd64.tar.gz"
 #go_tarball_checksum: "sha256:43ad621c9b014cde8db17393dc108378d37bc853aa351a6c74bf6432c1bbd182"
 go_version_target: "go version go{{ go_version }} linux/amd64"

tasks/main.yml

@@ -5,9 +5,8 @@
   register: latest_release
   changed_when: False
   when:
-    - go_tarball is not defined
+    - go_version is not defined
     - go_tarball_checksum is not defined
-    - go_download_location is not defined
 
 - name: Setting facts for autodiscovered version
   set_fact: