Golang config file best practices. But the target is the same - provide the app with a .

Golang config file best practices. I've currently opted to just make that a global variable, it will be set before any other code runs, and will never be written to. As a rule of thumb, files should be focused enough that a maintainer can tell which file contains something, and the files should be small enough that it will be easy to find once there. /test: This directory holds test-related files, such as test data and scripts. Let’s write a simple function that tests your Fooer function, which returns "Foo", when you input 3: Jun 14, 2023 · /deployments: This contains configuration files, scripts, and resources for different deployment environments. This makes it easy to program your Go app to store its configuration files in a standard location relevant to the host operating system. ini files, . Classic . In the code, we check MyEnv to decide which config file we would use. May 18, 2021 · With the release of Golang v1. How should I do that in a clean way ? Currently I use it with import logger inside my template. The Config package supports different kinds of sources that include JSON files, YAML files, Dot-env (. Reading a JSON File. gonfig is a lightweight Golang package for intergrating both JSON configs and enviornment variables into one config object. Configuration files like JSON and YAML are appropriate for holding static configurations in medium to large projects. Best practices of configuration file Dec 15, 2019 · There are many good approaches to handle configuration in a modern application. env) files, and OS environment variables. must be loaded successfully, otherwise the program exits, we generally use so, if the configuration is not correct, the program will not be able to continue Jan 28, 2015 · In the config files. io/ Viper is a complete configuration solution for Go applications including 12-Factor apps. We even have mechanics that "caches" . go file, Sep 29, 2022 · If the same bool/string/int option is provided on the command-line and in the config file, the option from command-line will be used. list of enabled/disabled linters) are combined from the command-line and config file. I have a couple of tasks I'd like to do with a GUI (I have an NTFS hard drive I want to backup, format as ext4 and then restore all the media onto). yaml, configs, modern . The below snippet can help you read the configuration file using the embed package May 9, 2022 · We have the configuration definition (config. May 19, 2019 · 1. The use cases for Viper are enormous, and building applications with Go becomes more manageable when used with Viper. yml — config on YAML format. Prerequisites Best practices or tips writing a CLI tool with golang. /vendor: Here, you will find application dependencies. Video and slides here. go. /my_app. It plays a critical role in handling various configuration needs, such as reading from environment variables, configuration files, and remote config systems, allowing for a more dynamic and flexible configuration management process. yaml), the next step is to load the configuration file, which can be done in three ways. It supports merging multiple configuration files, expanding environment variables, and a variety of other small niceties. Environment variables are a great way to store configuration information that can be used by your application. env files for production, like laravel or symfony, what mostly boils down to create a serialized php file version of the . , Travis CI) are very picky about the location of their config files. In Go, the predefined init() function sets off a piece of code to run before any other part of your package. For now, we only have 3 variables: Feb 13, 2020 · config. I'm adding tests to the app, and was wondering if there is a way of no having to pass a real file to ioutil. The format of the file depends on the needs of the application. 16 Embed feature was also released and with that we can mount the config files onto a structure in our program while building the binary itself and we do not need to ship the configuration files explicitly. SetConfigName("config") // The default configuration filename // Configuration may be overridden by environment variables // with the prefix APP and the rest of the key in uppercase v. yaml. Cover Image — Reading Configuration Files and Environment Variables in GO. g. It seems pretty cool for loading config files from various sources. Feb 20, 2023 · Learn how to easily read, write, and manage your configurations from remote sources using Viper, a Golang open-source config management library Dec 15, 2019 · There a couple of reasons: handle config files and environment variables, not command-line parameters; no magic, explicit way to read and use configuration; no implicit names, all mapping should be done using tags; the nice and informative help output; easy integration with other libraries. Mar 1, 2021 · I am learning Golang and was working on an application that reads a yaml configuration file and loads its contents into a struct. static variables (that we need to manage our code) sensitive data (password, secret, password of product use …. go: // +build dev package config // Development ready configuration const based on the build tags. There are many concurrent approaches to organize application configuration nowadays. Notably, with the advent of Go modules, this directory isn't as commonly used as before. But many developers does not want to manage 2 Note that some of the CI tools (e. Config File. Println(v Jan 28, 2017 · Overview ¶. May 30, 2023 · It allows developers to manage application configuration through environment variables and configuration files, making it easier to maintain different configurations for different environments. config/config. Try putting the config files in the /build/ci directory linking them to the location where the CI tools expect them (when possible). Oct 20, 2018 · The log and the template are on the same level (under internal package) In logger. It is designed to work within an application, and can handle all types of configuration needs and formats. Golang Viper is a comprehensive library used for managing application configurations in Golang projects. aconfig - Simple, useful and opinionated config loader. /my-binary -token "my_secret_token" -config my-config-file. Almost all Go code in the wild uses gofmt. The entry point for our application. And don’t forget about CLI arguments! Am I missing something? Jan 5, 2024 · Working with configuration files in Go. Use environment variables for configuration. Jul 27, 2024 · 2. It is commonly used for configuration files and in applications where data is being stored or transmitted. In this article, you’ll learn how to use Viper and apply it to these use cases. By convention, if your function is in the file fooer. . For example, passing an *os. Spend just 12 minutes of your time on this article and it will help you to write an effective Go code. GolangCI-Lint looks for config files in the following paths from the current working directory: Nov 1, 2022 · We will see how to read files and get individual pieces in the files. go file, then the unit test for that function is in the file fooer_test. Read configuration files. It currently supports YAML, but may be extended in the future to support more restrictive encodings like JSON or TOML. Environment Configuration Store configuration settings (like database credentials, port numbers, etc. Then we specify environment variable in the bootstrap scripts. Code on :) Oct 31, 2022 · The root structure of the application Directories /cmd. go file with all of that data, but have them encrypted in the file. Learn to master various reading methods, avoid common pitfalls, and optimize your file reading efficiency, ensuring your Golang programming reaches new heights of proficiency and effectiveness. But I could not find anything about merging config files and splitting them again after doing some modifications. bcl - BCL is a configuration language similar to HCL. For configuration values I recommend using environment variables, that way you can inject different values using the same artifact (the binary generated by Go) during runtime, using config-like files makes things a bit more complicated because you would need to provide different files per environment (plus the security concerns you already mentioned); please refer to the 12factor page for more Nov 20, 2019 · Package config is an encoding-agnostic configuration abstraction. Jul 7, 2021 · For example, in your case, you can pass a JSON file as follows . By understanding how YAML works, why it matters, and following best practices, developers can create more maintainable and efficient applications. Second part: some of the setup involves reading a config file/env vars/whatever into a config struct. For any feedback or discussion, please Nov 22, 2022 · Unit tests in Go are located in the same package (that is, the same folder) as the tested function. Jun 21, 2023 · Containerization with Docker. In this case, we found MyEnv is dev so we use config I think I might just start from scratch and follow the SHB guide from the offset. ) Dec 3, 2021 · Configuration management in Go (Golang) programming language Configuration Sources. What we did for secrets like that or configuration items is have a config. Let's say that the struct object of the configuration is something like: Instead, a type implements the interface just by implementing the interface's methods. Slice options (e. cleanenv - Minimalistic configuration reader (from files, ENV, and wherever you want). For example we run the app by export MyEnv=dev && . main. json, . Run gofmt on your code to automatically fix the majority of mechanical style issues. May 10, 2018 · When you repeat your self anywhere 2–3 times try to move your own best practices into utility libraries until you can focus on the actual business logic. Merging Configuration ¶ Jan 27, 2023 · For example, in dev environment we have config_dev. go Im using logrus as logger with some config sand I want to use the logger. go at master · go-zen-chu/golang-config-best-practice Jan 4, 2017 · Often when I open a code, I see configuration files with 3 kind of variables inside. Simplified configuration loading: Viper handles reading and parsing configuration files, environment variables, and other sources, reducing boilerplate code in your application. env and, of course, container environment. Using YAML files for configuration in Go offers a simple and human-readable approach to managing application settings. Apr 8, 2023 · Flexibility in choosing configuration formats: You can use JSON, YAML, TOML, or other supported formats for your configuration files without changing your Go code. Nov 2, 2020 · Next, we will use Viper to load this config file. ReadFile and instead mock its contents. go: Best practice project for handling config via cli, envvar, config file - golang-config-best-practice/main. . So getting variables from a conf file, and from the environment as well. Modern applications typically necessitate various configurations, tailored to each specific environment like development, testing, and production. go object inside the template package. AutomaticEnv() // In a production environment, you may use the APP_PORT environment variable to override the default port fmt. json to read all config keys from a file but overwrite the token just before launching with an argument. Then in each file, you define the tag used to use that file during the go build (or run, ) process. yaml, in production, we have config_prod. May 12, 2019 · May 12, 2019. Configuration can also be saved in a file and parsed automatically by the application. The rest of this document addresses non-mechanical style points. support File, Memory, Redis, Memcached. We'll use packages like os, ioutil and encoding to perform reading operations on file and file objects. Jan 1, 2024 · Introduction to GO Environment Variables. It supports: setting defaults; reading from JSON, TOML, YAML, HCL, envfile and Java properties config files Sep 26, 2019 · Introduction. Now we use such things as configuration files, environment variables, command-line parameters, as well as CI configuration patterns and on-fly config file builds, remote config servers, specific mapping, and binding services and even more complex things. Hi, what patterns do you recommend to write a good CLI application in golang? Next week in our local community we are going to do the exercise, as we are a small group will be nice to have some external feedback. ) and has a little bit less boilerplate (e. go — main file with web app code. The source for package bytes is a good example. What's YAML? Follow Wiki page: YAML (a recursive acronym for "YAML Ain't Markup Language") is a human-readable data-serialization language. org XDG Base Directo This synergy is not without its challenges, though. Environmental variables are dynamic key value pairs in an operating system. Reader interface. Use a package like viper to manage configurations. Containerization using Docker is a popular deployment strategy for modern web applications, providing a consistent and reproducible environment that can be easily deployed across different platforms. #20: Use Proper Indentation Jan 13, 2024 · gookit/ini Go config management, use INI files; gookit/rux Simple and fast request router for golang HTTP; gookit/gcli build CLI application, tool library, running CLI commands; gookit/event Lightweight event manager and dispatcher implements by Go; gookit/cache Generic cache use and cache manager for golang. Installation Libraries for configuration parsing. Oct 27, 2020 · In the context of a web application what would you consider a Go best practice for accessing the database in (HTTP or other) handlers? The replies it got were a genuinely interesting mix. Some people advised using dependency injection, a few favoured the simplicity of using global variables, others suggested putting the connection pool pointer Feb 25, 2023 · deployment: contains the deployment files for the application, including a Dockerfile, a docker-compose file, and a Kubernetes file. In practice, most interface conversions are static and therefore checked at compile time. Load config file Let’s create a new file config. Package configdir provides a cross platform means of detecting the system's configuration directories. Jun 6, 2020 · Viper can handle many types of configuration and formats. For Linux and some other Unixes (like BSD) this means following the Freedesktop. And it's truth! May 9, 2023 · To read a configuration file, you must set the file’s name, format, and location. In this article you will code up a sample Go application and learn how best to containerize it and run it securely. If you need a complex configuration with levels and hierarchy (in the fashion of the Windows Registry), then you might need to think about formats like JSON, YAML, or Feb 1, 2022 · Steve Francia’s Viper is an extremely popular Go library that slices and dices all kinds of configuration file and command-line flag needs, but it’s like the V’Ger spacecraft in Star Trek Jan 1, 2024 · Introduction to Golang Viper. Then during the initial execution of the binary, decrypt it, and keep it as a variable that can be pulled from. Dec 26, 2023 · We've touched on some of the idiomatic best practices when writing Go, in regards to: Project structure in regards to cmd, pkg, and internal; Go Workspaces; NewStruct constructor; Accept Interfaces and Return Structs; Functional Options Pattern; Context Values Best Practices; Related Articles "Golang Idioms and Best Practices: Part 1". Clean way to pass configs in a Go application. It means for instance in config_dev. ) in environment variables or configuration files. toml, . env files, which end in shared RAM-Opcaches at best. Go best practices, six years in (This article was originally a talk at QCon London 2016. The standard library often splits large packages to several source files, grouping related code by file. One of the best practices in the software industry when it comes to development is to maintain few variables Feb 9, 2022 · It can even live-read config variables, work with flags, and enable you to marshal and unmarshal. go file containing the package documentation. Here’s a detailed guide on the concept of ORMHate and code generation in Jan 1, 2024 · Explore the comprehensive world of "Golang Read File" with our definitive guide. SetEnvPrefix("APP") v. Jan 5, 2017 · If we want to implement the best practices for manage our conf files. Unmarshaling and return the config struct: Nov 9, 2023 · Introduction. 🗺️ back to content menu. Feb 22, 2021 · 8 File-based configuration . In our case the config file is called config and it is located in the current working directory. But the target is the same - provide the app with a May 9, 2013 · You might also be interested in go-libucl, a set of Go bindings for UCL, the Universal Configuration Language. Of course, you could also create a cli flag to define the path to the config file. Aug 24, 2020 · For programmers writing Go packages, it is good practice to separate the code into multiple shorter files – like separate code and tests, because the test codes will only be compiled at runtime. UCL is a bit like JSON, but with better support for humans: it supports comments and human-readable constructs like SI multipliers (10k, 40M, etc. This code will execute as soon as the package is imported, and can be used when you need your application to initialize in a specific state, such as when you have a specific configuration or set of resources with which your application needs to start. go inside the util package. 1. go) and the configuration file (config. File to a function expecting an io. Reader will not compile unless *os. Also, when we have more than one file in a package, it’s convention to create a doc. This article will discuss how to use Cleanenv in your Golang projects, covering installation, usage, and best practices. So it’s important to understand container best practices and key concepts to avoid security pitfalls that can easily creep into your container images. com/@onexlab. File implements the io. Jul 12, 2019 · The main idea is to use a structured configuration variable instead of any sort of dynamic set of configuration fields like some libraries does, to avoid unnecessary type conversions and move the configuration through the program as a simple structure, not as an object with complex behavior. ) In 2014, I gave a talk at the inaugural GopherCon titled Best Practices in Production Environments. This Config struct will hold all configuration variables of the application that we read from file or environment variables. Golang has built-in support for reading JSON files, but still, we can and need to have low-level controls on how to parse and extract content from the v. They are used to pass/convey configuration information to unix programs to enable programs to execute based on these environmental configurations. env : contains the environment variables used by the application. , quotes around keys). Thus functions in the application use that global state and it will guaranteed to be there and be populated. const ( MYSETTINGS = "dev blablabla" ISREADY = false ) Mar 24, 2023 · Loading the config file with viper: We just need to tell viper the name of the config file and the path where it can be found. Golang Config File Best PractiseIn this video, We will show you how to configure the config file in the Golang projectMedium: https://medium. The directory name for each application has to match the name of the executable you want to build. An alternative is to use goimports, a superset of gofmt which additionally adds (and removes) import lines Best practice project for handling config via cli, envvar, config file - go-zen-chu/golang-config-best-practice Dec 5, 2022 · By following these best practices, you can ensure that your Golang applications are running in a secure and efficient manner. Definitely worth considering when the config is stored in an etcd and for watching config changes That's why I starred the project a while ago. config - Cloud native application configuration. Then declare a new type Config struct in this file. clibk efzd jliin vzaqqn ziuzdali vatp cbiplk ogiogs tlzm zqkxz