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Author: righettod

scripts/generate-client-from-openapi-descriptor.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+############################################################################
+# Script to generate the client of a REST API from its OpenAPI descriptor
+# Requirements in terms of software:
+# 	apk add openjdk21 curl
+############################################################################
+
+# Constants
+ARTEFACT_BASE_URL="https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli"
+CLI_JAR_FILE="/tmp/openapi-generator-cli.jar"
+CLIENT_SOURCE_FOLDER="client"
+
+# Utility functions
+function write_step(){
+	echo -e "\e[93m$1\e[0m"
+}
+
+# Entry point
+if [ "$#" -lt 1 ]; then
+	script_name=$(basename "$0")
+	echo "Usage:"
+	echo "   $script_name [OPENAPI_DESCRIPTOR_YAML_FILE] [CLIENT_TECHNOLOGY]"
+	echo ""
+	echo "CLIENT_TECHNOLOGY is optional and default to 'java'."
+	echo ""
+	echo "Call example:"
+	echo "    $script_name openapi.yml"
+	echo "    $script_name openapi.yml python"
+    exit 1
+fi
+
+# Main processing
+openapi_descriptor_file="$1"
+tech="java"
+if [ $# -eq 2 ]
+then
+  tech="$2"
+fi
+if [ ! -f $CLI_JAR_FILE ]
+then
+	write_step "[+] Download the OpenAPI generator CLI from the Maven repository..."
+  cli_version=$(curl -sk "$ARTEFACT_BASE_URL/maven-metadata.xml" | grep -F "<release>" | cut -d '>' -f2 | cut -d '<' -f1 | tr -d ' ')
+  curl -sk --output $CLI_JAR_FILE "$ARTEFACT_BASE_URL/$cli_version/openapi-generator-cli-$cli_version.jar"
+  file $CLI_JAR_FILE
+fi
+write_step "[+] Generate the '$tech' client code into the folder '$CLIENT_SOURCE_FOLDER' ..."
+rm -rf $CLIENT_SOURCE_FOLDER/
+java -jar $CLI_JAR_FILE generate -g $tech -o $CLIENT_SOURCE_FOLDER -i $openapi_descriptor_file 1>/dev/null
+ls -l $CLIENT_SOURCE_FOLDER