Fix broken public_ip output (#54)

This is a cherry-pick of maartenvanderhoef@6dab639

It has been extended to include the README being rebuilt.

Co-authored-by: Maarten van der Hoef <maarten@vanderhoef.eu>

Author: rsrchboy

README.md

@@ -369,8 +369,8 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
 
 ### Contributors
 
-|  [![Erik Osterman][osterman_avatar]][osterman_homepage]<br/>[Erik Osterman][osterman_homepage] | [![Igor Rodionov][goruha_avatar]][goruha_homepage]<br/>[Igor Rodionov][goruha_homepage] | [![Andriy Knysh][aknysh_avatar]][aknysh_homepage]<br/>[Andriy Knysh][aknysh_homepage] | [![Sergey Vasilyev][s2504s_avatar]][s2504s_homepage]<br/>[Sergey Vasilyev][s2504s_homepage] | [![Valeriy][drama17_avatar]][drama17_homepage]<br/>[Valeriy][drama17_homepage] | [![Ivan Pinatti][ivan-pinatti_avatar]][ivan-pinatti_homepage]<br/>[Ivan Pinatti][ivan-pinatti_homepage] | [![Vladimir][SweetOps_avatar]][SweetOps_homepage]<br/>[Vladimir][SweetOps_homepage] | [![Konstantin B][comeanother_avatar]][comeanother_homepage]<br/>[Konstantin B][comeanother_homepage] |
-|---|---|---|---|---|---|---|---|
+|  [![Erik Osterman][osterman_avatar]][osterman_homepage]<br/>[Erik Osterman][osterman_homepage] | [![Igor Rodionov][goruha_avatar]][goruha_homepage]<br/>[Igor Rodionov][goruha_homepage] | [![Andriy Knysh][aknysh_avatar]][aknysh_homepage]<br/>[Andriy Knysh][aknysh_homepage] | [![Sergey Vasilyev][s2504s_avatar]][s2504s_homepage]<br/>[Sergey Vasilyev][s2504s_homepage] | [![Valeriy][drama17_avatar]][drama17_homepage]<br/>[Valeriy][drama17_homepage] | [![Ivan Pinatti][ivan-pinatti_avatar]][ivan-pinatti_homepage]<br/>[Ivan Pinatti][ivan-pinatti_homepage] | [![Vladimir][SweetOps_avatar]][SweetOps_homepage]<br/>[Vladimir][SweetOps_homepage] | [![Konstantin B][comeanother_avatar]][comeanother_homepage]<br/>[Konstantin B][comeanother_homepage] | [![Maarten van der Hoef][maartenvanderhoef_avatar]][maartenvanderhoef_homepage]<br/>[Maarten van der Hoef][maartenvanderhoef_homepage] |
+|---|---|---|---|---|---|---|---|---|
 
   [osterman_homepage]: https://github.com/osterman
   [osterman_avatar]: https://img.cloudposse.com/150x150/https://github.com/osterman.png
@@ -388,6 +388,8 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
   [SweetOps_avatar]: https://img.cloudposse.com/150x150/https://github.com/SweetOps.png
   [comeanother_homepage]: https://github.com/comeanother
   [comeanother_avatar]: https://img.cloudposse.com/150x150/https://github.com/comeanother.png
+  [maartenvanderhoef_homepage]: https://github.com/maartenvanderhoef
+  [maartenvanderhoef_avatar]: https://img.cloudposse.com/150x150/https://github.com/maartenvanderhoef.png
 
 [![README Footer][readme_footer_img]][readme_footer_link]
 [![Beacon][beacon]][website]

README.yaml

@@ -136,3 +136,5 @@ contributors:
     github: "SweetOps"
   - name: "Konstantin B"
     github: "comeanother"
+  - name: "Maarten van der Hoef"
+    github: "maartenvanderhoef"

outputs.tf

@@ -1,9 +1,6 @@
 output "public_ip" {
   description = "Public IP of instance (or EIP)"
-  value = coalesce(
-    join("", aws_eip.default.*.public_ip),
-    join("", aws_instance.default.*.public_ip)
-  )
+  value       = concat(aws_eip.default.*.public_ip, aws_instance.default.*.public_ip, [""])[0]
 }
 
 output "private_ip" {