build: Add automatic version

Author: yasker

main.go

@@ -7,7 +7,7 @@ import (
 	"os"
 )
 
-const (
+var (
 	// version of Convoy
 	VERSION = "0.5.0-dev"
 )

scripts/build

@@ -1,8 +1,12 @@
 #!/bin/bash
 set -e
 
+source $(dirname $0)/version
+
 cd $(dirname $0)/..
 
+echo Current building version is $VERSION
+
 mkdir -p bin
 go build -a -tags "netgo libdm_no_deferred_remove" \
 	-ldflags "-X main.VERSION=$VERSION -linkmode external -extldflags -static" \

scripts/version

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [ -n "$(git status --porcelain --untracked-files=no)" ]; then
+    DIRTY="-dirty"
+fi
+
+COMMIT=$(git rev-parse --short HEAD)
+GIT_TAG=$(git tag -l --contains HEAD | head -n 1)
+
+if [[ -z "$DIRTY" && -n "$GIT_TAG" ]]; then
+    VERSION=$GIT_TAG
+else
+    VERSION="${COMMIT}${DIRTY}"
+fi