Initialize dev env for Rust agent (#2293)

* init rust

Signed-off-by: Kosuke Morimoto <ksk@vdaas.org>

* add license

Signed-off-by: Kosuke Morimoto <ksk@vdaas.org>

---------

Signed-off-by: Kosuke Morimoto <ksk@vdaas.org>

.gitignore

@@ -55,3 +55,20 @@ hack/go.mod.default3
 .vscode/
 
 telepresence.log
+
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+#Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+!rust/libs

Makefile

@@ -86,6 +86,9 @@ SWAP_TAG             ?= latest
 
 BINDIR ?= /usr/local/bin
 
+RUST_DIR ?= $(HOME)/.cargo
+RUST_BIN ?= $(RUST_DIR)/bin
+
 UNAME := $(eval UNAME := $(shell uname -s))$(UNAME)
 ARCH := $(eval ARCH := $(shell uname -m))$(ARCH)
 PWD := $(eval PWD := $(shell pwd))$(PWD)

Makefile.d/tools.mk

@@ -95,3 +95,9 @@ stern/install: $(GOPATH)/bin/stern
 
 $(GOPATH)/bin/stern:
 	$(call go-install, github.com/stern/stern)
+
+.PHONY: rust/install
+rust/install: $(RUST_BIN)/cargo
+
+$(RUST_BIN)/cargo:
+	curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

buf.gen.yaml

@@ -38,3 +38,9 @@ plugins:
     out: apis/swagger
     opt:
       - json_names_for_fields=true
+  - plugin: buf.build/community/neoeinstein-prost
+    out: rust/libs/proto/src
+  - plugin: buf.build/community/neoeinstein-tonic
+    out: rust/libs/proto/src
+    opt:
+      - no_include

hack/license/gen/main.go

@@ -293,6 +293,8 @@ func readAndRewrite(path string) error {
 				tmpl = googleProtoApache
 			}
 			d.Escape = slushEscape
+		case ".rs":
+			d.Escape = slushEscape
 		default:
 			if fi.Name() == "Dockerfile" {
 				tmpl = docker