add basic script to bump patch number and call goreleaser

bin/push_new_patch.go

@@ -0,0 +1,54 @@
+// call from project root with
+// go run bin/push_new_patch.go
+
+// goreleaser expects a $GITHUB_TOKEN env variable to be defined
+// in order to push the release got github
+
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	version, err := ioutil.ReadFile("VERSION")
+	if err != nil {
+		log.Panicln(err.Error())
+	}
+	stringVersion := string(version)
+	fmt.Println("VERSION was " + stringVersion)
+
+	runCommand("git", "pull")
+
+	splitVersion := strings.Split(stringVersion, ".")
+	patch := splitVersion[len(splitVersion)-1]
+	newPatch, err := strconv.Atoi(patch)
+	splitVersion[len(splitVersion)-1] = strconv.FormatInt(int64(newPatch)+1, 10)
+	newVersion := strings.Join(splitVersion, ".")
+
+	err = ioutil.WriteFile("VERSION", []byte(newVersion), 0644)
+	if err != nil {
+		log.Panicln(err.Error())
+	}
+
+	runCommand("git", "add", "VERSION")
+	runCommand("git", "commit", "-m", "\"bump version to "+newVersion+"\"", "--", "VERSION")
+	runCommand("git", "push")
+	runCommand("git", "tag", newVersion)
+	runCommand("git", "push", "origin", newVersion)
+	runCommand("goreleaser", "--rm-dist")
+}
+
+func runCommand(args ...string) {
+	fmt.Println(strings.Join(args, " "))
+	output, err := exec.Command(args[0], args[1:]...).CombinedOutput()
+	if err != nil {
+		panic(err.Error())
+	}
+	log.Print(string(output))
+}