add official Dockerfile (#104)

.gitignore

@@ -1 +1,2 @@
 dist/
+VERSION

Dockerfile

@@ -0,0 +1,33 @@
+FROM golang:1.11.10-alpine as builder
+MAINTAINER FullStory Engineering
+
+# currently, a module build requires gcc (so Go tool can build
+# module-aware versions of std library; it ships only w/ the
+# non-module versions)
+RUN apk update && apk add --no-cache ca-certificates git gcc g++ libc-dev
+# create non-privileged group and user
+RUN addgroup -S grpcurl && adduser -S grpcurl -G grpcurl
+
+WORKDIR /tmp/fullstorydev/grpcurl
+# copy just the files/sources we need to build grpcurl
+COPY VERSION *.go go.* /tmp/fullstorydev/grpcurl/
+COPY cmd /tmp/fullstorydev/grpcurl/cmd
+# and build a completely static binary (so we can use
+# scratch as basis for the final image)
+ENV CGO_ENABLED=0
+ENV GOOS=linux
+ENV GOARCH=amd64
+ENV GO111MODULE=on
+RUN go build -o /grpcurl \
+    -ldflags "-w -extldflags \"-static\" -X \"main.version=$(cat VERSION)\"" \
+    ./cmd/grpcurl
+
+# New FROM so we have a nice'n'tiny image
+FROM scratch
+WORKDIR /
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=builder /etc/passwd /etc/passwd
+COPY --from=builder /grpcurl /bin/grpcurl
+USER grpcurl
+
+ENTRYPOINT ["/bin/grpcurl"]

Makefile

@@ -25,6 +25,12 @@ release:
 	@GO111MODULE=off go get github.com/goreleaser/goreleaser
 	goreleaser --rm-dist
 
+.PHONY: docker
+docker:
+	@echo $(dev_build_version) > VERSION
+	docker build -t fullstorydev/grpcurl:$(dev_build_version) .
+	@rm VERSION
+
 .PHONY: checkgofmt
 checkgofmt:
 	gofmt -s -l .

cmd/grpcurl/grpcurl.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -161,7 +162,7 @@ func main() {
 		os.Exit(0)
 	}
 	if *printVersion {
-		fmt.Fprintf(os.Stderr, "%s %s\n", os.Args[0], version)
+		fmt.Fprintf(os.Stderr, "%s %s\n", filepath.Base(os.Args[0]), version)
 		os.Exit(0)
 	}