build: adapt goclean.sh to work with module packages

goclean.sh

@@ -1,19 +1,53 @@
 #!/bin/bash
 # The script does automatic checking on a Go package and its sub-packages, including:
 # 1. gofmt         (http://golang.org/cmd/gofmt/)
+# 2. goimports     (https://godoc.org/golang.org/x/tools/cmd/goimports)
 # 3. go vet        (http://golang.org/cmd/vet)
 # 4. gosimple      (https://github.com/dominikh/go-simple)
 # 5. unconvert     (https://github.com/mdempsky/unconvert)
 # 6. race detector (http://blog.golang.org/race-detector)
 # 7. test coverage (http://blog.golang.org/cover)
 
-set -ex
+# Automatic checks
+for i in $(find . -name go.mod -type f -print); do
+  module=$(dirname ${i})
+  echo "==> ${module}"
 
-env GORACE="halt_on_error=1" go test -race -tags="rpctest" -covermode atomic -coverprofile=profile.cov ./...
+  MODNAME=$(echo $module | sed -E -e "s/^$ROOTPATHPATTERN//" \
+    -e 's,^/,,' -e 's,/v[0-9]+$,,')
+  if [ -z "$MODNAME" ]; then
+    MODNAME=.
+  fi
 
-# Automatic checks
-golangci-lint run --deadline=10m --disable-all \
---enable=gofmt \
---enable=vet \
---enable=gosimple \
---enable=unconvert
+  # run tests
+  (cd $MODNAME && env GORACE=halt_on_error=1 go test -tags="rpctest" -race ./...) || exit 1
+
+  # check linters
+  (cd $MODNAME && \
+    go mod download && \
+    golangci-lint run --deadline=10m --disable-all \
+      --enable=gofmt \
+      --enable=goimports \
+      --enable=govet \
+      --enable=gosimple \
+      --enable=unconvert
+  )
+done
+
+# Run test coverage on each subdirectories and merge the coverage profile.
+
+echo "mode: count" > profile.cov
+
+# Standard go tooling behavior is to ignore dirs with leading underscores.
+for dir in $(find . -maxdepth 10 -not -path './.git*' -not -path '*/_*' -type d);
+do
+if ls $dir/*.go &> /dev/null; then
+  go test -covermode=count -coverprofile=$dir/profile.tmp $dir
+  if [ -f $dir/profile.tmp ]; then
+    cat $dir/profile.tmp | tail -n +2 >> profile.cov
+    rm $dir/profile.tmp
+  fi
+fi
+done
+
+go tool cover -func profile.cov