Adds scripts to publish releases

Makefile

@@ -26,6 +26,12 @@ build-golang-all:
 	GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -o bin/envy.x86_64-pc-linux-gnu.bin src/golang/main.go
 	upx bin/envy.x86_64-pc-linux-gnu.bin
 
+prerelease: build-golang-all
+	scripts/prerelease
+
+release: build-golang-all
+	scripts/release
+
 # --- ruby specific -----------------------------------------------------------
 
 test-ruby:

scripts/prerelease

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -eu -o pipefail
+
+DATE=$(date "+%y%m%d-%H%M%S")
+
+# RELEASE_TYPE=""
+# RELEASE_TYPE="--draft"
+RELEASE_TYPE="--prerelease"
+
+# prepare release.md text file
+erb date=$DATE $0.md.erb > tmp/release.md
+
+hub release create $RELEASE_TYPE \
+                   --attach "bin/envy.x86_64-pc-linux-gnu.bin#linux binary" \
+                   --attach "bin/envy.x86_64-apple-darwin18.bin#macos binary" \
+                   --file tmp/release.md \
+                   --edit \
+                   --commitish purpose/add-go \
+                   releases/$DATE

scripts/prerelease.md.erb

@@ -0,0 +1,8 @@
+<%= "Prerelease #{date}" %>
+
+This is a prerelease. Handle with care!
+
+To use it either:
+
+- download the binary for your platform and rename it to "envy", or
+- download the source and run `make install`.

scripts/release

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -eu -o pipefail
+
+DATE=$(date "+%y%m%d-%H%M%S")
+
+# RELEASE_TYPE=""
+# RELEASE_TYPE="--draft"
+RELEASE_TYPE="--prerelease"
+
+# prepare release.md text file
+erb date=$DATE $0.md.erb > tmp/release.md
+
+hub release create $RELEASE_TYPE \
+                   --attach "bin/envy.x86_64-pc-linux-gnu.bin#linux binary" \
+                   --attach "bin/envy.x86_64-apple-darwin18.bin#macos binary" \
+                   --file tmp/release.md \
+                   --edit \
+                   --commitish purpose/add-go \
+                   releases/$DATE

scripts/release.md.erb

@@ -0,0 +1,6 @@
+<%= "Release #{date}" %>
+
+This is a release. To use it either:
+
+- download the binary for your platform and rename it to "envy", or
+- download the source and run `make install`.