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HCL: HashiCorp Configuration Language
Official repository for HCL, the HashiCorp Configuration Language. HCL is a configuration language designed for human-friendly structured configuration that is also suitable for automation.
Go
Added on 2025年6月22日5,491
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LanguageProject Introduction
Summary
HCL is the configuration language created by HashiCorp. It is used across HashiCorp's product suite and can be embedded in other projects as a general-purpose configuration format.
Problem Solved
Traditional configuration formats (like YAML or JSON) can become complex and less readable for large, hierarchical configurations, and often lack features like templating or variables. HCL addresses this by providing a dedicated language with enhanced features for configuration.
Core Features
Human-friendly Syntax
Provides a syntax designed for human readability and editability, while remaining machine-parseable.
Rich Language Features
Supports various features like variables, functions, templates, and modules for powerful configuration management.
Parser and Evaluator
Includes robust parsing and evaluation libraries for programmatic use.
Tech Stack
Go
Lexing
Parsing
Use Cases
HCL is primarily used for defining configuration in a structured and human-readable format, suitable for both manual editing and programmatic generation.
Scenario 1: Defining Infrastructure and Cloud Resources
Details
Used extensively in HashiCorp products like Terraform, Vault, Consul, Nomad, etc., to define infrastructure, secrets, services, and workloads.
User Value
Provides a consistent, versionable, and declarative way to manage complex system configurations across different platforms.
Scenario 2: Custom Application Configuration
Details
Can be embedded as a library in custom applications to handle their specific configuration needs using a rich language.
User Value
Offers a more expressive and feature-rich alternative to standard formats like JSON or YAML for application settings.
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