Add version and build number output

.gitignore

@@ -3,6 +3,6 @@
 *.pem
 .*.swp
 .idea/
-cacert-board_vote
+cacert-boardvoting
 config.yaml
 database.sqlite

Makefile

@@ -0,0 +1,11 @@
+VERSION := $(shell git describe --always --dirty=-dev)
+BUILD := $(shell date --iso-8601=seconds --utc)
+GOFILES := $(wildcard *.go)
+
+cacert-boardvoting: ${GOFILES}
+	go build -o $@ -ldflags "-X 'main.version=${VERSION}' -X 'main.build=${BUILD}'"
+
+clean:
+	rm -f cacert-boardvoting
+
+.PHONY: clean

boardvoting.go

@@ -23,6 +23,8 @@ import (
 var logger *log.Logger
 var config *Config
 var store *sessions.CookieStore
+var version = "undefined"
+var build = "undefined"
 
 const sessionCookieName = "votesession"
 
@@ -407,6 +409,8 @@ func init() {
 }
 
 func main() {
+	logger.Printf("CAcert Board Voting version %s, build %s\n", version, build)
+
 	var err error
 	db, err = sqlx.Open("sqlite3", config.DatabaseFile)
 	if err != nil {