have travis generate sha512sums after goreleaser produces archives

.goreleaser.yml

@@ -46,6 +46,11 @@ builds:
       - goos: linux
         goarch: mips64le
 
+checksum:
+  # You can change the name of the checksums file.
+  # Default is `{{ .ProjectName }}_{{ .Version }}_checksums.txt`.
+  name_template: "{{ .ProjectName }}_{{ .Version }}_sha256-checksums.txt"
+
 archive:
   format: tar.gz
   files:

.travis.yml

@@ -16,10 +16,17 @@ before_deploy:
 - go get github.com/goreleaser/goreleaser
 deploy:
   skip_cleanup: true
-  provider: script
-  script: goreleaser
-  on:
-    tags: true
+  - #goreleaser
+    provider: script
+    script: goreleaser
+    on:
+      tags: true
+  - #checksum
+    provider: script
+    script: travis/generate-sha512sum.sh
+    on:
+      tags: true
+
 env:
   global:
     secure: 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

travis/generate-sha512sum.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+
+if [ -d dist ]; then
+  files=( dist/*sha256-checksums.txt )  
+  file=`basename ${files[0]}`
+  IFS=\_ read -r package prefix x <<< $file
+  if [ -n "$prefix" ]; then
+    echo "Generating sha512sum for ${package}_${prefix}"
+    cd dist
+    sha512sum *.tar.gz > "${package}_${prefix}_sha512-checksum.txt"
+    cat "${package}_${prefix}_sha512-checksum.txt"
+  fi
+fi