add checksum file generation

.drone.star

@@ -177,6 +177,14 @@ def binaries(arch):
           'ls -lah release/'
         ]
       },
+      {
+        'name': 'checksum',
+        'image': 'alpine',
+        'commands': [
+            'cd release/ && sha256sum * > sha256sum.txt',
+            'cat sha256sum.txt'
+        ],
+      },
       {
         'name': 'publish',
         'image': 'plugins/github-release',
@@ -185,6 +193,7 @@ def binaries(arch):
           'api_key': {
             'from_secret': 'github_token'
           },
+          'files': [ "release/*" ],
           'title': '${DRONE_TAG}',
           'note': 'CHANGELOG.md',
         },

.drone.yml

@@ -250,11 +250,19 @@ steps:
   environment:
     BUILD_VERSION: ${DRONE_TAG##v}
 
+- name: checksum
+  image: alpine
+  commands:
+  - cd release/ && sha256sum * > sha256sum.txt
+  - cat sha256sum.txt
+
 - name: publish
   image: plugins/github-release
   settings:
     api_key:
       from_secret: github_token
+    files:
+    - release/*
     note: CHANGELOG.md
     overwrite: true
     title: ${DRONE_TAG}
@@ -345,6 +353,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 4c60720bd47e885df1e36d84a68edb5e4fb4f9030113a52dda16b37a7da11f85
+hmac: dfd7579768ef56661e69f51498b32a2cedc72869c01876711963f7f9b8d76fc4
 
 ...

CHANGELOG.md

@@ -0,0 +1,6 @@
+- FEATURE
+  - add env variable `GITHUB_REPOS`
+  - add env variable `IGNORE_PRE`
+- INTERNAL
+  - provide also binary releases
+  - switch to gomod instead of vendor folder