reproducible binary builds via trimpath

Resolves #10

Signed-off-by: Matt Hamilton <matt@soluble.ai>

Dockerfile

@@ -3,7 +3,7 @@ WORKDIR $GOPATH/src/github.com/soluble-ai/kubetap
 COPY . .
 RUN apk add --no-cache -U upx && \
     go mod download && \
-    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o /go/bin/kubectl-tap ./cmd/kubectl-tap && \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -ldflags="-w -s" -o /go/bin/kubectl-tap ./cmd/kubectl-tap && \
     upx /go/bin/kubectl-tap
 
 FROM alpine:latest as alpine

Dockerfile.alpine

@@ -3,7 +3,7 @@ WORKDIR $GOPATH/src/github.com/soluble-ai/kubetap
 COPY . .
 RUN apk add --no-cache -U upx && \
     go mod download && \
-    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o /go/bin/kubectl-tap ./cmd/kubectl-tap && \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -ldflags="-w -s" -o /go/bin/kubectl-tap ./cmd/kubectl-tap && \
     upx /go/bin/kubectl-tap
 
 FROM alpine:latest as alpine

scripts/build-kubetap.zsh

@@ -12,6 +12,6 @@ source ${script_dir}/_pre.zsh
 go mod download
 
 # build and install
-go install -v -ldflags="-s -w" ./cmd/kubectl-tap
+go install -v -trimpath -ldflags="-s -w" ./cmd/kubectl-tap
 
 source ${script_dir}/_post.zsh

scripts/test.zsh

@@ -27,7 +27,7 @@ GO111MODULE=on go get -modfile=ci.mod gotest.tools/gotestsum/@${GOTESTSUM_VERSIO
 gotestsum --format=short-verbose --no-summary=skipped --junitfile=coverage.xml -- -count=1 -race -coverprofile=coverage.txt -covermode=atomic ./...
 
 # ensure we can build
-go build -v -ldflags="-s -w" -o /dev/null ./cmd/kubectl-tap 
+go build -v -trimpath -ldflags="-s -w" -o /dev/null ./cmd/kubectl-tap
 
 # tidy modules, in case this is a local build env
 go mod tidy