#!/bin/bash

####

#

# generate-rust-api-client.sh

#

# This script uses openapi-generator-cli to generate a Rust API client from an

# OpenAPI specification. The unfortunate truth is that this project is authored

# in Java, so to run this script you need all the Java infrastructure on your

# development machine. There's instructions in README.md on how to set this up.

# We've lifted this script from the openapi-generator project's repository.

#

# The below variables are used in small modifications that we've made from the

# source script to make this work for our specific usecase.

#

###

# TOWER_URL is the URL of the API that we want to generate the client from.

TOWER_URL="https://api.tower.dev"

# BASEDIR is the directory to change into before running the generator.

BASEDIR=$(dirname "$0")

# CONFIG_FILE is the config file for the generator. Should be in the same directory as BASEDIR.

CONFIG_FILE="rust-api-client-generator-config.yaml"

# ARGS are the args sent to the generator.

ARGS="generate --config ${CONFIG_FILE}"

# OPENAPI_GENERATOR_VERSION is the version of the openapi-generator-cli to use.

OPENAPI_GENERATOR_VERSION="7.19.0"

# We need to get the OpenAPI spec file into scope in the first place.

curl -sL ${TOWER_URL}/v1/openapi.json -o ${BASEDIR}/openapi.json

###

#

# Start of the opernapi-generator-cli script

#

# Source: https://raw.githubusercontent.com/OpenAPITools/openapi-generator/master/bin/utils/openapi-generator-cli.sh

#

###

####

# Save as openapi-generator-cli on your PATH. chmod u+x. Enjoy.

#

# This script will query github on every invocation to pull the latest released version

# of openapi-generator.

#

# If you want repeatable executions, you can explicitly set a version via

# OPENAPI_GENERATOR_VERSION

# e.g. (in Bash)

# export OPENAPI_GENERATOR_VERSION=3.1.0

# openapi-generator-cli.sh

# or

# OPENAPI_GENERATOR_VERSION=3.1.0 openapi-generator-cli.sh

#

# This is also helpful, for example, if you want to evaluate a SNAPSHOT version.

#

# NOTE: Jars are downloaded on demand from maven into the same directory as this script

# for every 'latest' version pulled from github. Consider putting this under its own directory.

####

set -o pipefail

for cmd in {mvn,jq,curl}; do

if ! command -v ${cmd} > /dev/null; then

>&2 echo "This script requires '${cmd}' to be installed."

exit 1

fi

done

function latest.tag {

local uri="https://api.github.com/repos/${1}/releases"

local ver=$(curl -s ${uri} | jq -r 'first(.[]|select(.prerelease==false)).tag_name')

if [[ $ver == v* ]]; then

ver=${ver:1}

fi

echo $ver

}

ghrepo=openapitools/openapi-generator

groupid=org.openapitools

artifactid=openapi-generator-cli

ver=${OPENAPI_GENERATOR_VERSION:-$(latest.tag $ghrepo)}

jar=${artifactid}-${ver}.jar

cachedir=${OPENAPI_GENERATOR_DOWNLOAD_CACHE_DIR}

DIR=${cachedir:-"$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"}

if [ ! -d "${DIR}" ]; then

mkdir -p "${DIR}"

fi

if [ ! -f ${DIR}/${jar} ]; then

repo="central::default::https://repo1.maven.org/maven2/"

if [[ ${ver} =~ ^.*-SNAPSHOT$ ]]; then

repo="central::default::https://oss.sonatype.org/content/repositories/snapshots"

fi

mvn org.apache.maven.plugins:maven-dependency-plugin:2.9:get \

-DremoteRepositories=${repo} \

-Dartifact=${groupid}:${artifactid}:${ver} \

-Dtransitive=false \

-Ddest=${DIR}/${jar}

fi

cd $BASEDIR

java -ea \

${JAVA_OPTS} \

-Xms512M \

-Xmx1024M \

-jar ${DIR}/${jar} ${ARGS}

# Run cargo fmt to ensure consistent formatting with project settings

cd ../crates/tower-api && cargo fmt