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# Terraform Extension for Visual Studio Code The HashiCorp [Terraform Extension for Visual Studio Code (VS Code)](https://marketplace.visualstudio.com/items?itemName=HashiCorp.terraform) with the [Terraform Language Server](https://github.com/hashicorp/terraform-ls) adds editing features for [Terraform](https://www.terraform.io) files such as syntax highlighting, IntelliSense, code navigation, code formatting, module explorer and much more! ## Quick Start Get started writing Terraform configurations with VS Code in three steps: - **Step 1:** If you haven't done so already, install [Terraform](https://www.terraform.io/downloads) - **Step 2:** Install the [Terraform Extension for VS Code](https://marketplace.visualstudio.com/items?itemName=HashiCorp.terraform). - **Step 3:** To activate the extension, open any folder or VS Code workspace containing Terraform files. Once activated, the Terraform language indicator will appear in the bottom right corner of the window. New to Terraform? Read the [Terraform Learning guides](https://learn.hashicorp.com/terraform) See [Usage](#usage) for more detailed getting started information. Read the [Troubleshooting Guide](#troubleshooting) for answers to common questions. ## Features - [IntelliSense](#intellisense-and-autocomplete) Edit your code with auto-completion of providers, resource names, data sources, attributes and more - [Syntax validation](#syntax-validation) Provides inline diagnostics for invalid configuration as you type - [Syntax highlighting](#syntax-highlighting) Highlighting syntax from Terraform 0.12 to 1.X - [Code Navigation](#code-navigation) Navigate through your codebase with Go to Definition and Symbol support - [Code Formatting](#code-formatting) Format your code with `terraform fmt` automatically - [Code Snippets](#code-snippets) Shortcuts for commmon snippets like `for_each` and `variable` - [Terraform Module Explorer](#terraform-module-and-provider-explorer) View all modules and providers referenced in the currently open document. - [Terraform commands](#terraform-commands) Directly execute commands like `terraform init` or `terraform plan` from the VS Code Command Palette. ### IntelliSense and Autocomplete IntelliSense is a general term for a variety of code editing features including: code completion, parameter info, quick info, and member lists. IntelliSense features are sometimes called by other names such as autcomplete, code completion, and code hinting. For Terraform constructs like resource and data, labels, blocks and attributes are auto completed both at the root of the document and inside other blocks. This also works for Terraform modules that are installed in the workspace, attributes and other constructs are autocompleted. > **Note:** If there are syntax errors present in the document upon opening, intellisense may not provide all completions. Please fix the errors and reload the document and intellisense will return. See [hcl-lang#57](https://github.com/hashicorp/hcl-lang/issues/57) for more information. Invoking intellisense is performed through the [keyboard combination](https://code.visualstudio.com/docs/getstarted/keybindings) for your platform and the results depend on where the cursor is placed. If the cursor is at the beginning of a line and no other characters are present, then a list of constructs like `data`, `provider`, `resource`, etc are shown.  If inside a set of quotes or inside a block, the extension provides context specific completions appropriate for the location. For example, inside a `resource` block attributes for a given provider are listed.  Combining `editor.suggest.preview` with the [pre-fill required fields](#code-completion) setting will provide inline snippet suggestions for blocks of code:  Completing the snippet allows you to tab complete through each attribute and block. ### Syntax Validation Terraform configuration files are validated when opened and on change, and invalid code is marked with diagnostics. HCL syntax is checked for e.g. missing control characters like `}`, `"` or others in the wrong place.  Enhanced validation of selected Terraform language constructs in both `*.tf` and `*.tfvars` files based on detected Terraform version and provider versions is also provided. This can highlight deprecations, missing required attributes or blocks, references to undeclared variables and more, [as documented](https://github.com/hashicorp/terraform-ls/blob/main/docs/validation.md#enhanced-validation).   The enhanced validation feature is enabled by default but can be disabled using the following setting: ```json "terraform.validation.enableEnhancedValidation": false ``` The extension also provides validation through [`terraform validate`](https://www.terraform.io/cli/commands/validate). This can be triggered via command palette. Unlike the other validation methods, this one requires the Terraform CLI installed and a previous successful run of `terraform init` (i.e. local installation of all providers and modules) to function correctly. It is the slowest method, but the most thorough - i.e. it will catch the most mistakes.   ### Syntax Highlighting Terraform syntax highlighting recognizes language constructs from Terraform version 0.12 to 1.X. Terraform providers, modules, variables and other high-level constructs are recognized, as well as more complex code statements like `for` loops, conditional expressions, and other complex expressions.  Some language constructs will highlight differently for older versions of Terraform that are incompatible with newer ways of expressing Terraform code. In these cases we lean toward ensuring the latest version of Terraform displays correctly and do our best with older versions. ### Code Navigation While editing, you can right-click different identifiers to take advantage of several convenient commands - `Go to Definition` (`F12`) navigates to the code that defines the construct where your cursor is. This command is helpful when you're working with Terraform modules and variables defined in other files than the currently opened document. - `Peek Definition` (`Alt+F12`) displays the relevant code snippet for the construct where your cursor is directly in the current editor instead of navigating to another file. - `Go to Declaration` navigates to the place where the variable or other construct is declared. - `Peek Declaration` displays the declaration directly inside the current editor. ### Code Formatting This extension utilizes [`terraform fmt`](https://www.terraform.io/cli/commands/fmt) to rewrite an open document to a canonical format and style. This command applies a subset of the [Terraform language style conventions](https://www.terraform.io/language/syntax/style), along with other minor adjustments for readability. See the [Formatting](#formatting) Configuration section for information on how to configure this feature. ### Code Snippets The extension provides several snippets to accelerate adding Terraform code to your configuration files: - `fore` - For Each - `module` - Module - `output` - Output - `provisioner` - Provisioner - `vare` - Empty variable - `varm` - Map Variable ### Terraform Module and Provider Explorer List Terraform modules used in the current open document in the Explorer Pane, or drag to the Side Bar pane for an expanded view. Each item shows an icon indicating where the module comes from (local filesystem, git repository, or Terraform Registry).  If the module comes from the Terraform Registry, a link to open the documentation in a browser is provided.  List Terraform provide