chore: improve Makefile, gitignore, and goreleaser changelog

- Inject version from git tags in Makefile build
- Add clean and coverage targets to Makefile
- Add .DS_Store and coverage.out to .gitignore
- Categorize and filter goreleaser changelog

Author: zulerne

.gitignore

@@ -3,3 +3,5 @@ dist/
 demo.tape
 record-demo.sh
 .idea/
+.DS_Store
+coverage.out

.goreleaser.yaml

@@ -34,3 +34,16 @@ checksum:
 
 changelog:
   sort: asc
+  filters:
+    exclude:
+      - "^chore:"
+      - "^docs:"
+      - "^ci:"
+      - "^test:"
+  groups:
+    - title: Bug Fixes
+      regexp: "^fix:"
+    - title: Features
+      regexp: "^feat:"
+    - title: Other
+      regexp: ".*"

Makefile

@@ -1,7 +1,9 @@
-.PHONY: build test lint fmt run
+.PHONY: build test lint fmt run clean coverage
+
+VERSION ?= $(shell git describe --tags --always --dirty)
 
 build:
-	go build -o ccost ./cmd/ccost
+	go build -ldflags "-X main.version=$(VERSION)" -o ccost ./cmd/ccost
 
 test:
 	go test ./...
@@ -13,4 +15,12 @@ fmt:
 	gofmt -w .
 
 run:
-	go run ./cmd/ccost
+	go run ./cmd/ccost
+
+clean:
+	rm -f ccost
+	rm -f coverage.out
+
+coverage:
+	go test -coverprofile=coverage.out ./...
+	go tool cover -func=coverage.out