all: use -mod=readonly

Author: changkun

docker/Dockerfile

@@ -2,12 +2,12 @@
 # All rights reserved. Use of this source code is governed
 # by a GPLv3 license that can be found in the LICENSE file.
 
-FROM golang:1.14-alpine
+FROM golang:1.15.3
 WORKDIR /app
 ADD . /app
 # required for runtime/cgo
-RUN apk add g++
+RUN apt install g++
 RUN go get -u golang.org/x/tools/cmd/goimports && go mod tidy
-RUN go build -o ssaplayground.service -mod=mod
+RUN go build -o ssaplayground.service -mod=readonly
 EXPOSE 6789
 ENTRYPOINT [ "/app/ssaplayground.service", "-conf=/app/configs/docker.yaml"]

src/route/api.go

@@ -184,9 +184,9 @@ func initModules(path string) error {
 func buildSSA(funcname, gcflags, outf, buildf string, isTest bool) error {
 	var cmd *exec.Cmd
 	if !isTest {
-		cmd = exec.Command("go", "build", fmt.Sprintf(`-gcflags=%s`, gcflags), "-o", outf, buildf)
+		cmd = exec.Command("go", "build", "-mod=readonly", fmt.Sprintf(`-gcflags=%s`, gcflags), "-o", outf, buildf)
 	} else {
-		cmd = exec.Command("go", "test", fmt.Sprintf(`-gcflags=%s`, gcflags), buildf)
+		cmd = exec.Command("go", "test", "-mod=readonly", fmt.Sprintf(`-gcflags=%s`, gcflags), buildf)
 	}
 	cmd.Env = append(os.Environ(), fmt.Sprintf("GOSSAFUNC=%s", funcname))
 	cmd.Stderr = &bytes.Buffer{}