Adding Command proto serialization. (bazelbuild#129)

As usual, Go proto files need to be checked in to work with go build.
Modeling our pre-commit hooks after the remote-apis repo.

.githooks/pre-commit

@@ -1,11 +1,18 @@
 #!/bin/sh
 
-
 ########################################################################
 # Check that all Go files have been gofmt'd.
 ########################################################################
 # Find all change go files.
 gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '\.go$')
-[ -z "$gofiles" ] && exit 0
 
-source ./check-gofmt.sh "$gofiles"
+./check-gofmt.sh $gofiles
+
+########################################################################
+# Precommit hook to rebuild generated go code. Fails if building or
+# copying the files fails.
+########################################################################
+bazel build go/api/command:command_go_proto
+GEN_CMD_PATH="go/api/command/command.pb.go"
+cp -f "$(find $(bazel info bazel-bin) -path "*/$GEN_CMD_PATH")" "$GEN_CMD_PATH"
+git add "$GEN_CMD_PATH"

check-gofmt.sh

@@ -2,7 +2,11 @@
 
 # Source: https://github.com/golang/go/blob/88da9ccb98ffaf84bb06b98c9a24af5d0a7025d2/misc/git/pre-commit
 
-unformatted=$(gofmt -l "$@")
+if [ "$#" -lt 1 ]; then
+  exit 0
+fi
+
+unformatted=$(gofmt -l $@)
 [ -z "$unformatted" ] && exit 0
 
 # Some files are not gofmt'd. Print message and fail.

go/api/command/BUILD.bazel

@@ -0,0 +1,24 @@
+load("@rules_proto//proto:defs.bzl", "proto_library")
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
+
+proto_library(
+    name = "command_proto",
+    srcs = ["command.proto"],
+    visibility = ["//visibility:public"],
+    deps = ["@com_google_protobuf//:timestamp_proto"],
+)
+
+go_proto_library(
+    name = "command_go_proto",
+    importpath = "github.com/bazelbuild/remote-apis-sdks/go/api/command",
+    proto = ":command_proto",
+    visibility = ["//visibility:public"],
+)
+
+go_library(
+    name = "go_default_library",
+    embed = [":command_go_proto"],
+    importpath = "github.com/bazelbuild/remote-apis-sdks/go/api/command",
+    visibility = ["//visibility:public"],
+)