Replace japaric-trust/crate_install.sh with mdBook install script

Author: oscr

docs/book/Makefile

@@ -17,7 +17,7 @@ ROOT_DIR:=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
 TOOLS_DIR := $(realpath ../../hack/tools)
 TOOLS_BIN_DIR := $(TOOLS_DIR)/bin
 BIN_DIR := bin
-CRATE_INSTALL := $(realpath ../../third_party/japaric-trust/crate_install.sh)
+MDBOOK_INSTALL := $(realpath ../../scripts/ci-install-mdbook.sh)
 
 export PATH := $(TOOLS_BIN_DIR):$(PATH)
 
@@ -34,9 +34,10 @@ RELEASELINK := $(TOOLS_BIN_DIR)/mdbook-releaselink
 $(RELEASELINK): $(TOOLS_DIR)/go.mod
 	cd $(TOOLS_DIR); go build -tags=tools -o $(BIN_DIR)/mdbook-releaselink ./mdbook/releaselink
 
-MDBOOK := $(TOOLS_BIN_DIR)/mdbook
+# Only set MDBOOK if it's not set as an environment variable
+MDBOOK ?= $(TOOLS_BIN_DIR)/mdbook
 $(MDBOOK):
-	$(CRATE_INSTALL) --git rust-lang/mdBook --tag v0.4.11 --to $(TOOLS_BIN_DIR) --force
+	$(MDBOOK_INSTALL) v0.4.11 $(TOOLS_BIN_DIR)
 
 RUNTIME_OPENAPI_GEN_BIN := runtime-openapi-gen
 RUNTIME_OPENAPI_GEN := $(abspath $(TOOLS_BIN_DIR)/$(RUNTIME_OPENAPI_GEN_BIN))

scripts/ci-install-mdbook.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# Copyright 2022 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+VERSION=${1}
+OUTPUT_PATH=${2}
+
+# Ensure the output folder exists
+mkdir -p "${OUTPUT_PATH}"
+
+# Get what release to download
+RELEASE_NAME=""
+case "$OSTYPE" in
+  darwin*) RELEASE_NAME="x86_64-apple-darwin.tar.gz"  ;;
+  linux*)  RELEASE_NAME="x86_64-unknown-linux-gnu.tar.gz" ;;
+#  msys*)    echo "WINDOWS" ;;
+  *)        echo "No mdBook release available for: $OSTYPE" && exit 1;;
+esac
+
+# Download and extract the mdBook release
+curl -L "https://github.com/rust-lang/mdBook/releases/download/${VERSION}/mdbook-${VERSION}-${RELEASE_NAME}" | tar -xvz -C "${OUTPUT_PATH}"