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command/fmt: Add new fmt command This uses the `fmtcmd` package which has recently been merged into HCL. Per the usage text, this rewrites Terraform config files to their canonical formatting and style. Some notes about the implementation for this initial commit: - all of the fmtcmd options are exposed as CLI flags - it operates on all files that have a `.tf` suffix - it currently only operates on the working directory and doesn't accept a directory argument, but I'll extend this in subsequent commits - output is proxied through `cli.UiWriter` so that we write in the same way as other commands and we can capture the output during tests - the test uses a very simple fixture just to ensure that it is working correctly end-to-end; the fmtcmd package has more exhaustive tests - we have to write the fixture to a file in a temporary directory because it will be modified and for this reason it was easier to define the fixture contents as a raw string
2016-02-02 23:10:22 +01:00
---
layout: "docs"
page_title: "Command: fmt"
sidebar_current: "docs-commands-fmt"
description: |-
The `terraform fmt` command is used to rewrite Terraform configuration files to a canonical format and style.
---
# Command: fmt
The `terraform fmt` command is used to rewrite Terraform configuration files
to a canonical format and style.
## Usage
Usage: `terraform fmt [options] [DIR]`
`fmt` scans the current directory for configuration files.
The command-line flags are all optional. The list of available flags are:
command/fmt: Default write and list to true The most common usage usage will be enabling the `-write` and `-list` options so that files are updated in place and a list of any modified files is printed. This matches the default behaviour of `go fmt` (not `gofmt`). So enable these options by default. This does mean that you will have to explicitly disable these if you want to generate valid patches, e.g. `terraform fmt -diff -write=false -list=false`
2016-02-02 23:10:22 +01:00
* `-list=true` - List files whose formatting differs
* `-write=true` - Write result to source file instead of STDOUT
command/fmt: Add new fmt command This uses the `fmtcmd` package which has recently been merged into HCL. Per the usage text, this rewrites Terraform config files to their canonical formatting and style. Some notes about the implementation for this initial commit: - all of the fmtcmd options are exposed as CLI flags - it operates on all files that have a `.tf` suffix - it currently only operates on the working directory and doesn't accept a directory argument, but I'll extend this in subsequent commits - output is proxied through `cli.UiWriter` so that we write in the same way as other commands and we can capture the output during tests - the test uses a very simple fixture just to ensure that it is working correctly end-to-end; the fmtcmd package has more exhaustive tests - we have to write the fixture to a file in a temporary directory because it will be modified and for this reason it was easier to define the fixture contents as a raw string
2016-02-02 23:10:22 +01:00
* `-diff=false` - Display diffs instead of rewriting files