Refactor Makefile.

- Fix incorrect .PHONY clause for the binary.
- Change `dist` to the more conventional `build`.
- Rename binary to `kaf-relay` from `kaf-relay.bin`.
- Make version string construction more robust.

.goreleaser.yml

@@ -4,16 +4,18 @@ before:
 
 builds:
   - env:
-      - CGO_ENABLED=1
+      - CGO_ENABLED=0
     binary: kaf-relay
     goos:
       - linux
     goarch:
       - amd64
+    ldflags:
+      - -s -w -X "main.buildString={{ .Tag }} ({{ .ShortCommit }} {{ .Date }})" -X "main.versionString={{ .Tag }}"
 
 archives:
   - format: tar.gz
     files:
       - config.toml.sample
       - README.md
-      - LICENSE
+      - LICENSE

Makefile

@@ -1,18 +1,18 @@
-# Git version for injecting into Go bins.
-LAST_COMMIT := $(shell git rev-parse --short HEAD)
-LAST_COMMIT_DATE := $(shell git show -s --format=%ci ${LAST_COMMIT})
-VERSION := $(shell git describe --tags)
-BUILDSTR := ${VERSION} (Commit: ${LAST_COMMIT_DATE} (${LAST_COMMIT}), Build: $(shell date +"%Y-%m-%d% %H:%M:%S %z"))
+# Try to get the commit hash from 1) git 2) the VERSION file 3) fallback.
+LAST_COMMIT := $(or $(shell git rev-parse --short HEAD 2> /dev/null),$(shell head -n 1 VERSION | grep -oP -m 1 "^[a-z0-9]+$$"),"")
 
-BIN := kaf-relay.bin
-DIST := dist
+# Try to get the semver from 1) git 2) the VERSION file 3) fallback.
+VERSION := $(or $(LISTMONK_VERSION),$(shell git describe --tags --abbrev=0 2> /dev/null),$(shell grep -oP 'tag: \Kv\d+\.\d+\.\d+(-[a-zA-Z0-9.-]+)?' VERSION),"v0.0.0")
+BUILDSTR := ${VERSION} (\#${LAST_COMMIT} $(shell date -u +"%Y-%m-%dT%H:%M:%S%z"))
 
-.PHONY: dist
-dist:
-	mkdir -p ${DIST}
-	CGO_ENABLED=1 go build -o ${BIN} --ldflags="-X 'main.buildString=${BUILDSTR}'"
-	cp ${BIN} ${DIST}
+BIN := kaf-relay
+
+.PHONY: build
+build: $(BIN)
+
+$(BIN):
+	CGO_ENABLED=0 go build -o ${BIN} --ldflags="-X 'main.buildString=${BUILDSTR}'"
 
 .PHONY: clean
 clean:
-	rm -rf ${DIST}
+	rm -rf ${BIN}