add coverage.html

.build.yml

@@ -1,30 +1,11 @@
 image: alpine/edge
 packages:
   - go
+  - make
 sources:
   - https://git.sr.ht/~motiejus/undocker
 tasks:
   - test: |
-      cd undocker
-      go test -cover ./...
-  - build-linux-amd64: |
-      cd undocker
-      CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o undocker-linux-amd64
-  - build-linux-arm64: |
-      cd undocker
-      CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o undocker-linux-arm64
-  - build-darwin-amd64: |
-      cd undocker
-      CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -o undocker-darwin-amd64
-  - build-darwin-arm64: |
-      cd undocker
-      CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 go build -o undocker-darwin-arm64
-  - build-windows-amd64: |
-      cd undocker
-      CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o undocker-windows-amd64.exe
+      make -C coverage.html
 artifacts:
-  - undocker/undocker-linux-amd64
-  - undocker/undocker-linux-arm64
-  - undocker/undocker-darwin-amd64
-  - undocker/undocker-darwin-arm64
-  - undocker/undocker-windows-amd64.exe
+  - undocker/coverage.html

.gitignore

@@ -1 +1,2 @@
 /undocker
+coverage.html

Makefile

@@ -0,0 +1,10 @@
+.PHONY: test
+test:
+	go test -cover ./...
+
+.INTERMEDIATE: coverage.out
+coverage.out: $(shell git ls-files '*.go')
+	go test -coverprofile $@ ./...
+
+coverage.html: coverage.out
+	go tool cover -html=$< -o $@