Makefile: add gocover target

Author: charlievieth

Makefile

@@ -54,6 +54,16 @@ test_all:
 test_all_libsqlite3:
 	@GOEXPERIMENT=cgocheck2 go test -tags "$(ALL_TEST_TAGS_JOINED),libsqlite3" -v
 
+# Run tests with coverages then display in browser, if possible.
+.PHONY: cover
+cover:
+	@./scripts/gocover.bash -tags "$(ALL_TEST_TAGS_JOINED)"
+
+# Run tests with coverages then display in browser, if possible.
+.PHONY: cover_libsqlite3
+cover_libsqlite3:
+	@./scripts/gocover.bash -tags "$(ALL_TEST_TAGS_JOINED),libsqlite3"
+
 .PHONY: qtest
 qtest:
 	@GOEXPERIMENT=cgocheck2 go test -tags "libsqlite3"

scripts/gocover.bash

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+set -eo pipefail
+
+# run coverage tests on the current Go package
+function gocover() {
+    local exit_code=0
+    local tmpfile
+    tmpfile="$(mktemp -t 'gocover')" || return 1
+    go test -covermode=atomic -coverprofile="${tmpfile}" "$@" || {
+        exit_code=1
+    }
+    go tool cover -html="${tmpfile}" || {
+        rm "${tmpfile}"
+        exit_code=1
+    }
+    return $exit_code
+}
+
+gocover "$@"