fix(kubectl-trace): bpftracebase using specified version

Signed-off-by: Lorenzo Fontana <[email protected]>

Author: fntlnz

Dockerfile.bpftracebase

@@ -1,6 +1,5 @@
-ARG bpftracesha
-
 FROM alpine:3.8 as builder
+ARG bpftracesha
 ENV STATIC_LINKING=ON
 ENV RUN_TESTS=0
 RUN apk add --update \
@@ -24,11 +23,12 @@ RUN ln -s /usr/include/llvm5/llvm-c /usr/include/llvm-c
 
 WORKDIR /
 
-RUN git clone https://github.com/iovisor/bpftrace.git /bpftrace
+ADD https://github.com/iovisor/bpftrace/archive/${bpftracesha}.tar.gz /bpftrace.tar.gz
+RUN tar -xvf /bpftrace.tar.gz
 
-WORKDIR /bpftrace
+RUN mv bpftrace-${bpftracesha} /bpftrace
 
-#RUN git checkout ${bpftracesha}
+WORKDIR /bpftrace
 
 WORKDIR /bpftrace/docker