### Quick Install Tip Build at Specific Commit

Source: https://docs.terragrunt.com/getting-started/install

Install a tip build from a specific commit by providing the commit SHA to the install script.

```bash
curl -sSfL --proto '=https' --tlsv1.2 https://terragrunt.com/install | bash -s -- --tip --commit <commit-sha>
```

--------------------------------

### Example package.json dependencies

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/setup

This snippet shows a sample of dependencies within a package.json file, including various @smithy packages and tslib. Ensure your project has these or equivalent dependencies installed.

```json
{
        "integrity": "sha512-m80d/iicI7DlBDxyQP6Th7BW/ejDGiF0bgI754+tiwK0lgMkcaIBgvwwVc7OFbY4eUzpGtnig52MhPAEJ7iNYg==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/chunked-blob-reader": "^5.2.0",
          "@smithy/chunked-blob-reader-native": "^4.2.1",
          "@smithy/types": "^4.12.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      }
```

```json
{
        "version": "4.2.8",
        "resolved": "https://registry.npmjs.org/@smithy/hash-node/-/hash-node-4.2.8.tgz",
        "integrity": "sha512-7ZIlPbmaDGxVoxErDZnuFG18WekhbA/g2/i97wGj+wUBeS6pcUeAym8u4BXh/75RXWhgIJhyC11hBzig6MljwA==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/types": "^4.12.0",
          "@smithy/util-buffer-from": "^4.2.0",
          "@smithy/util-utf8": "^4.2.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      }
```

```json
{
        "version": "4.2.8",
        "resolved": "https://registry.npmjs.org/@smithy/hash-stream-node/-/hash-stream-node-4.2.8.tgz",
        "integrity": "sha512-v0FLTXgHrTeheYZFGhR+ehX5qUm4IQsjAiL9qehad2cyjMWcN2QG6/4mSwbSgEQzI7jwfoXj7z4fxZUx/Mhj2w==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/types": "^4.12.0",
          "@smithy/util-utf8": "^4.2.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      }
```

```json
{
        "version": "4.2.8",
        "resolved": "https://registry.npmjs.org/@smithy/invalid-dependency/-/invalid-dependency-4.2.8.tgz",
        "integrity": "sha512-N9iozRybwAQ2dn9Fot9kI6/w9vos2oTXLhtK7ovGqwZjlOcxu6XhPlpLpC+INsxktqHinn5gS2DXDjDF2kG5sQ==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/types": "^4.12.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      }
```

```json
{
        "version": "4.2.0",
        "resolved": "https://registry.npmjs.org/@smithy/is-array-buffer/-/is-array-buffer-4.2.0.tgz",
        "integrity": "sha512-DZZZBvC7sjcYh4MazJSGiWMI2L7E0oCiRHREDzIxi/M2LY79/21iXt6aPLHge82wi5LsuRF5A06Ds3+0mlh6CQ==",
        "license": "Apache-2.0",
        "dependencies": {
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      }
```

```json
{
        "version": "4.2.8",
        "resolved": "https://registry.npmjs.org/@smithy/md5-js/-/md5-js-4.2.8.tgz",
        "integrity": "sha512-oGMaLj4tVZzLi3itBa9TCswgMBr7k9b+qKYowQ6x1rTyTuO1IU2YHdHUa+891OsOH+wCsH7aTPRsTJO3RMQmjQ==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/types": "^4.12.0",
          "@smithy/util-utf8": "^4.2.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      }
```

```json
{
        "version": "4.2.8",
        "resolved": "https://registry.npmjs.org/@smithy/middleware-content-length/-/middleware-content-length-4.2.8.tgz",
        "integrity": "sha512-RO0jeoaYAB1qBRhfVyq0pMgBoUK34YEJxVxyjOWYZiOKOq2yMZ4MnVXMZCUDenpozHue207+9P5ilTV1zeda0A==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/protocol-http": "^5.3.8",
          "@smithy/types": "^4.12.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      }
```

```json
{
        "version": "4.4.16",
        "resolved": "https://registry.npmjs.org/@smithy/middleware-endpoint/-/middleware-endpoint-4.4.16.tgz",
        "integrity": "sha512-L5GICFCSsNhbJ5JSKeWFGFy16Q2OhoBizb3X2DrxaJwXSEujVvjG9Jt386dpQn2t7jINglQl0b4K/Su69BdbMA==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/core": "^3.23.2",
          "@smithy/middleware-serde": "^4.2.9",
          "@smithy/node-config-provider": "^4.3.8",
          "@smithy/shared-ini-file-loader": "^4.4.3",
          "@smithy/types": "^4.12.0",
          "@smithy/url-parser": "^4.2.8",
          "@smithy/util-middleware": "^4.2.8",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      }
```

```json
{
        "version": "4.4.33",
        "resolved": "https://registry.npmjs.org/@smithy/middleware-retry/-/middleware-retry-4.4.33.tgz",
        "integrity": "sha512-jLqZOdJhtIL4lnA9hXnAG6GgnJlo1sD3FqsTxm9wSfjviqgWesY/TMBVnT84yr4O0Vfe0jWoXlfFbzsBVph3WA==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/node-config-provider": "^4.3.8",
          "@smithy/protocol-http": "^5.3.8",
          "@smithy/service-error-classification": "^4.2.8",

```

--------------------------------

### Quick Install Test Build at Specific Commit

Source: https://docs.terragrunt.com/getting-started/install

Install a test build from a specific commit by providing the commit SHA and the --test flag to the install script.

```bash
curl -sSfL --proto '=https' --tlsv1.2 https://terragrunt.com/install | bash -s -- --test --commit <commit-sha>
```

--------------------------------

### Manual Install Latest Tip Build

Source: https://docs.terragrunt.com/getting-started/install

Manually install the latest tip build by downloading the archive, verifying checksums, and extracting the binary.

```bash
set -euo pipefail

# Set your platform (linux, darwin, windows) and architecture (amd64, arm64, 386)
OS="linux"
ARCH="amd64"

ARCHIVE="terragrunt_${OS}_${ARCH}.tar.gz"

# Download the archive and checksums
curl -sL -o "$ARCHIVE" \
  "https://builds.terragrunt.com/api/v1/tip/latest/download?os=${OS}&arch=${ARCH}"
curl -sL -o SHA256SUMS \
  "https://builds.terragrunt.com/api/v1/tip/latest/download?filename=SHA256SUMS"

# Verify checksum
EXPECTED=$(awk -v f="$ARCHIVE" '$2 == f {print $1; exit}' SHA256SUMS)
ACTUAL=$(sha256sum "$ARCHIVE" | awk '{print $1}')  # macOS: use "shasum -a 256"
if [ "$EXPECTED" != "$ACTUAL" ]; then
  echo "Checksum verification failed!"
  exit 1
fi
echo "Checksum verified!"

# Extract and install
tar -xzf "$ARCHIVE"
chmod +x "terragrunt_${OS}_${ARCH}"
sudo mv "terragrunt_${OS}_${ARCH}" /usr/local/bin/terragrunt
```

--------------------------------

### Quick Install Latest Tip Build

Source: https://docs.terragrunt.com/getting-started/install

Use the install script with the --tip flag to quickly install the latest tip build of Terragrunt.

```bash
curl -sSfL --proto '=https' --tlsv1.2 https://terragrunt.com/install | bash -s -- --tip
```

--------------------------------

### Full Migration Workflow Example

Source: https://docs.terragrunt.com/reference/cli/commands/backend/migrate

This example demonstrates the complete process of renaming a unit and migrating its backend state, including copying, migrating, and then removing the old unit.

```bash
cp -R old-unit-name new-unit-name
terragrunt backend migrate old-unit-name new-unit-name
rm -rf old-unit-name
```

--------------------------------

### Manual Install Tip Build at Specific Commit

Source: https://docs.terragrunt.com/getting-started/install

Manually install a tip build from a specific commit by downloading the archive, verifying checksums, and extracting the binary.

```bash
set -euo pipefail

# Set the commit SHA, platform, and architecture
COMMIT="abc123def456"
OS="linux"
ARCH="amd64"

ARCHIVE="terragrunt_${OS}_${ARCH}.tar.gz"

# Download the archive and checksums
curl -sL -o "$ARCHIVE" \
  "https://builds.terragrunt.com/api/v1/tip/${COMMIT}/download?os=${OS}&arch=${ARCH}"
curl -sL -o SHA256SUMS \
  "https://builds.terragrunt.com/api/v1/tip/${COMMIT}/download?filename=SHA256SUMS"

# Verify checksum
EXPECTED=$(awk -v f="$ARCHIVE" '$2 == f {print $1; exit}' SHA256SUMS)
ACTUAL=$(sha256sum "$ARCHIVE" | awk '{print $1}')  # macOS: use "shasum -a 256"
if [ "$EXPECTED" != "$ACTUAL" ]; then
  echo "Checksum verification failed!"
  exit 1
fi
echo "Checksum verified!"

# Extract and install
tar -xzf "$ARCHIVE"
chmod +x "terragrunt_${OS}_${ARCH}"
sudo mv "terragrunt_${OS}_${ARCH}" /usr/local/bin/terragrunt
```

--------------------------------

### Quick Install Terragrunt

Source: https://docs.terragrunt.com/getting-started/install

Use this command for the fastest installation on Linux or macOS. It downloads and executes the installation script directly.

```bash
curl -sSfL --proto '=https' --tlsv1.2 https://terragrunt.com/install | bash
```

--------------------------------

### Install Terragrunt on FreeBSD with Pkg

Source: https://docs.terragrunt.com/getting-started/install

Use Pkg to install Terragrunt on FreeBSD.

```bash
pkg install terragrunt
```

--------------------------------

### View Terragrunt Install Script Options

Source: https://docs.terragrunt.com/getting-started/install

To see all available options for the installation script or to review the script's content before execution, use this command.

```bash
curl -sSfL --proto '=https' --tlsv1.2 https://terragrunt.com/install | bash -s -- --help
```

--------------------------------

### Manual Install Test Build at Specific Commit

Source: https://docs.terragrunt.com/getting-started/install

Manually install a test build from a specific commit by downloading the archive, verifying checksums, and extracting the binary.

```bash
set -euo pipefail

# Set the commit SHA, platform, and architecture
COMMIT="abc123def456"
OS="linux"
ARCH="amd64"

ARCHIVE="terragrunt_${OS}_${ARCH}.tar.gz"
BASE_URL="https://builds.terragrunt.com/test/${COMMIT}"

# Download the archive and checksums
curl -sL -o "$ARCHIVE" "${BASE_URL}/${ARCHIVE}"
curl -sL -o SHA256SUMS "${BASE_URL}/SHA256SUMS"

# Verify checksum
EXPECTED=$(awk -v f="$ARCHIVE" '$2 == f {print $1; exit}' SHA256SUMS)
ACTUAL=$(sha256sum "$ARCHIVE" | awk '{print $1}')  # macOS: use "shasum -a 256"
if [ "$EXPECTED" != "$ACTUAL" ]; then
  echo "Checksum verification failed!"
  exit 1
fi
echo "Checksum verified!"

# Extract and install
tar -xzf "$ARCHIVE"
chmod +x "terragrunt_${OS}_${ARCH}"
sudo mv "terragrunt_${OS}_${ARCH}" /usr/local/bin/terragrunt
```

--------------------------------

### Install Terragrunt on Gentoo with Emerge

Source: https://docs.terragrunt.com/getting-started/install

Use emerge to install Terragrunt on Gentoo Linux.

```bash
emerge -a app-admin/terragrunt-bin
```

--------------------------------

### Build Terragrunt from Source

Source: https://docs.terragrunt.com/getting-started/install

Clone the Terragrunt repository and use Go to build and install the executable.

```shell
git clone https://github.com/gruntwork-io/terragrunt.git
cd terragrunt
# Feel free to checkout a particular tag, etc if you want here.
go install
```

--------------------------------

### Download and Inspect Terragrunt Install Script

Source: https://docs.terragrunt.com/getting-started/install

Download the installation script to your local filesystem for review before execution. This is a safer alternative to piping directly to bash.

```bash
curl -sSfL --proto '=https' --tlsv1.2 -o install.sh https://terragrunt.com/install
less install.sh
bash install.sh
```

--------------------------------

### Terraform Configuration Example

Source: https://docs.terragrunt.com/reference/hcl/blocks

A sample Terragrunt configuration file demonstrating the use of hooks.

```hcl
terragrunt.hcl
```

--------------------------------

### Example package.json dependencies

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/setup

This snippet shows example dependencies in a package.json file, including versions for various AWS SDK packages and related utilities. It's relevant for understanding the project's dependencies when working with AWS SDKs in a Node.js environment.

```json
          "bowser": "^2.11.0",
          "tslib": "^2.6.2"
        }
      },
      "node_modules/@aws-sdk/util-user-agent-node": {
        "version": "3.972.9",
        "resolved": "https://registry.npmjs.org/@aws-sdk/util-user-agent-node/-/util-user-agent-node-3.972.9.tgz",
        "integrity": "sha512-JNswdsLdQemxqaSIBL2HRhsHPUBBziAgoi5RQv6/9avmE5g5RSdt1hWr3mHJ7OxqRYf+KeB11ExWbiqfrnoeaA==",
        "license": "Apache-2.0",
        "dependencies": {
          "@aws-sdk/middleware-user-agent": "^3.972.11",
          "@aws-sdk/types": "^3.973.1",
          "@smithy/node-config-provider": "^4.3.8",
          "@smithy/types": "^4.12.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=20.0.0"
        },
        "peerDependencies": {
          "aws-crt": ">=1.0.0"
        },
        "peerDependenciesMeta": {
          "aws-crt": {
            "optional": true
          }
        }
      },
      "node_modules/@aws-sdk/xml-builder": {
        "version": "3.972.19",
        "resolved": "https://registry.npmjs.org/@aws-sdk/xml-builder/-/xml-builder-3.972.19.tgz",
        "integrity": "sha512-Cw8IOMdBUEIl8ZlhRC3Dc/E64D5B5/8JhV6vhPLiPfJwcRC84S6F8aBOIi/N4vR9ZyA4I5Cc0Ateb/9EHaJXeQ==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/types": "^4.14.1",
          "fast-xml-parser": "5.7.1",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=20.0.0"
        }
      },
      "node_modules/@aws/lambda-invoke-store": {
        "version": "0.2.3",
        "resolved": "https://registry.npmjs.org/@aws/lambda-invoke-store/-/lambda-invoke-store-0.2.3.tgz",
        "integrity": "sha512-oLvsaPMTBejkkmHhjf09xTgk71mOqyr/409NKhRIL08If7AhVfUsJhVsx386uJaqNd42v9kWamQ9lFbkoC2dYw==",
        "license": "Apache-2.0",
        "engines": {
          "node": ">=18.0.0"
        }
      },
      "node_modules/@nodable/entities": {
        "version": "2.1.0",
        "resolved": "https://registry.npmjs.org/@nodable/entities/-/entities-2.1.0.tgz",
        "integrity": "sha512-nyT7T3nbMyBI/lvr6L5TyWbFJAI9FTgVRakNoBqCD+PmID8DzFrrNdLLtHMwMszOtqZa8PAOV24ZqDnQrhQINA==",
        "funding": [
          {
            "type": "github",
            "url": "https://github.com/sponsors/nodable"
          }
        ],
        "license": "MIT"
      },
      "node_modules/@smithy/abort-controller": {
        "version": "4.2.8",
        "resolved": "https://registry.npmjs.org/@smithy/abort-controller/-/abort-controller-4.2.8.tgz",
        "integrity": "sha512-peuVfkYHAmS5ybKxWcfraK7WBBP0J+rkfUcbHJJKQ4ir3UAUNQI+Y4Vt/PqSzGqgloJ5O1dk7+WzNL8wcCSXbw==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/types": "^4.12.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      },
      "node_modules/@smithy/chunked-blob-reader": {
        "version": "5.2.0",
        "resolved": "https://registry.npmjs.org/@smithy/chunked-blob-reader/-/chunked-blob-reader-5.2.0.tgz",
        "integrity": "sha512-WmU0TnhEAJLWvfSeMxBNe5xtbselEO8+4wG0NtZeL8oR21WgH1xiO37El+/Y+H/Ie4SCwBy3MxYWmOYaGgZueA==",
        "license": "Apache-2.0",
        "dependencies": {
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      },
      "node_modules/@smithy/chunked-blob-reader-native": {
        "version": "4.2.1",
        "resolved": "https://registry.npmjs.org/@smithy/chunked-blob-reader-native/-/chunked-blob-reader-native-4.2.1.tgz",
        "integrity": "sha512-lX9Ay+6LisTfpLid2zZtIhSEjHMZoAR5hHCR4H7tBz/Zkfr5ea8RcQ7Tk4mi0P76p4cN+Btz16Ffno7YHpKXnQ==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/util-base64": "^4.3.0",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      },
      "node_modules/@smithy/config-resolver": {
        "version": "4.4.6",
        "resolved": "https://registry.npmjs.org/@smithy/config-resolver/-/config-resolver-4.4.6.tgz",
        "integrity": "sha512-qJpzYC64kaj3S0fueiu3kXm8xPrR3PcXDPEgnaNMRn0EjNSZFoFjvbUp0YUDsRhN1CB90EnHJtbxWKevnH99UQ==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/node-config-provider": "^4.3.8",
          "@smithy/types": "^4.12.0",
          "@smithy/util-config-provider": "^4.2.0",
          "@smithy/util-endpoints": "^3.2.8",
          "@smithy/util-middleware": "^4.2.8",
          "tslib": "^2.6.2"
        },
        "engines": {
          "node": ">=18.0.0"
        }
      },
      "node_modules/@smithy/core": {
        "version": "3.23.2",
        "resolved": "https://registry.npmjs.org/@smithy/core/-/core-3.23.2.tgz",
        "integrity": "sha512-HaaH4VbGie4t0+9nY3tNBRSxVTr96wzIqexUa6C2qx3MPePAuz7lIxPxYtt1Wc//SPfJLNoZJzfdt0B6ksj2jA==",
        "license": "Apache-2.0",
        "dependencies": {
          "@smithy/middleware-serde": "^4.2.9",

```

--------------------------------

### Example Output of Hook Execution

Source: https://docs.terragrunt.com/features/units/hooks

Illustrates the expected output when the 'test_hook' is executed during a 'tofu apply' or 'terraform apply' command.

```bash
TF_PATH=tofu COMMAND=apply HOOK_NAME=test_hook
```

--------------------------------

### Example CSV run report content

Source: https://docs.terragrunt.com/features/stacks/run-report

This is an example of the data structure for a Terragrunt run report in CSV format. It includes details like Name, Started, Ended, Result, Reason, and Cause for each unit.

```csv
Name,Started,Ended,Result,Reason,Cause
first-exclude,2025-06-05T16:28:41-04:00,2025-06-05T16:28:41-04:00,excluded,exclude block,
second-exclude,2025-06-05T16:28:41-04:00,2025-06-05T16:28:41-04:00,excluded,exclude block,
first-failure,2025-06-05T16:28:41-04:00,2025-06-05T16:28:42-04:00,failed,run error,
first-success,2025-06-05T16:28:41-04:00,2025-06-05T16:28:41-04:00,succeeded,,
second-failure,2025-06-05T16:28:41-04:00,2025-06-05T16:28:42-04:00,failed,run error,
second-success,2025-06-05T16:28:41-04:00,2025-06-05T16:28:41-04:00,succeeded,,
second-early-exit,2025-06-05T16:28:42-04:00,2025-06-05T16:28:42-04:00,early exit,run error,
first-early-exit,2025-06-05T16:28:42-04:00,2025-06-05T16:28:42-04:00,early exit,run error,
```

--------------------------------

### Example Filters File Content

Source: https://docs.terragrunt.com/features/filter/filters-file

Define include and exclude patterns for Terragrunt units. Lines starting with '#' and empty lines are ignored.

```text
./subtree/**
!./subtree/dependency/**
```

--------------------------------

### Create Application Directory Structure

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/setup

Set up the necessary directories for the application, including nested folders.

```bash
mkdir -p app/best-cat
cd app/best-cat
```

--------------------------------

### Initialize and Apply Terralith Infrastructure

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/step-1-starting-the-terralith

Navigate to the 'live' directory and run tofu init followed by tofu apply to deploy your infrastructure. You will be prompted to confirm the apply.

```bash
cd live
tofu init
tofu apply
```

--------------------------------

### Run Jaeger for OpenTelemetry Tracing

Source: https://docs.terragrunt.com/troubleshooting/debugging

This command starts a local Jaeger instance, a distributed tracing system, to visualize Terragrunt's operations. Ensure Docker is installed and running.

```bash
docker run --rm --name jaeger -e COLLECTOR_OTLP_ENABLED=true -p 16686:16686 -p 4317:4317 -p 4318:4318 jaegertracing/all-in-one:1.54.0
```

--------------------------------

### Specify Terraform/OpenTofu Binary Path

Source: https://docs.terragrunt.com/reference/cli/commands/run

Example of using the --tf-path flag to specify a custom path to the Terraform or OpenTofu binary. This is useful for managing multiple versions or non-standard installations.

```bash
terragrunt run plan --tf-path=/usr/local/bin/tofu
```

--------------------------------

### Filters File Content Example

Source: https://docs.terragrunt.com/reference/cli/commands/hcl/validate

A filters file can contain multiple filter queries, one per line. Empty lines and lines starting with '#' are ignored. Use '!' to negate a filter.

```text
# Production environment filters
type=unit
./prod/**


# Exclude test units
!name=test-*
```

--------------------------------

### Include Units Matching a Glob Pattern

Source: https://docs.terragrunt.com/features/stacks/run-queue

Use the --filter flag with a glob pattern to include only specific units. This example includes all units within directories starting with 'subtree'.

```bash
terragrunt run --all --filter './subtree/**' -- plan
```

--------------------------------

### Create Terragrunt Configuration for Tutorial Project

Source: https://docs.terragrunt.com/getting-started/quick-start

Create an empty Terragrunt configuration file within the 'foo' directory to integrate the existing OpenTofu project with Terragrunt.

```bash
touch foo/terragrunt.hcl
```

--------------------------------

### Exclude Units Matching a Glob Pattern

Source: https://docs.terragrunt.com/features/stacks/run-queue

Use the --filter flag with a negative glob pattern (prefixed with '!') to exclude specific units. This example excludes all units within directories starting with 'subtree'.

```bash
terragrunt run --all --filter '!./subtree/**' -- plan
```

--------------------------------

### Create Live Directory

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/step-1-starting-the-terralith

Creates the 'live' directory to house infrastructure provisioning code, a recommended practice for separating infrastructure patterns.

```bash
mkdir live
```

--------------------------------

### Render all configurations and write to JSON files

Source: https://docs.terragrunt.com/reference/cli/commands/render

This example demonstrates rendering all Terragrunt configurations in the current working directory and writing them to `terragrunt.rendered.json` files. It uses the `--all`, `--json`, and `--write` flags.

```bash
terragrunt render --all --json
```

--------------------------------

### Download latest tip build by platform

Source: https://docs.terragrunt.com/process/releases

Downloads the `.tar.gz` archive for the latest tip build, specifying the operating system and architecture. The response redirects to the actual archive file.

```plaintext
GET /api/v1/tip/latest/download?os=<os>&arch=<arch>
```

```bash
curl -L -o terragrunt.tar.gz \
  "https://builds.terragrunt.com/api/v1/tip/latest/download?os=linux&arch=amd64"
```

--------------------------------

### Initialize and Apply Terralith/Terragrunt Configuration

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/step-3-adding-dev

Run these commands in the 'live' directory to initialize the Terraform backend and apply the new environment configuration after adding a module.

```bash
tofu init
tofu apply
```

--------------------------------

### Apply Terragrunt configuration

Source: https://docs.terragrunt.com

This command navigates into the 'foo' directory and applies the Terragrunt configuration, which in turn executes the OpenTofu configuration. This will initialize the backend, download providers, and create the specified resources, such as the local file.

```bash
$ cd foo
$ terragrunt apply -auto-approve

```

```stdout
18:44:26.066 STDOUT tofu: Initializing the backend...
18:44:26.067 STDOUT tofu: Initializing provider plugins...
18:44:26.067 STDOUT tofu: - Finding latest version of hashicorp/local...
18:44:26.717 STDOUT tofu: - Installing hashicorp/local v2.5.2...
18:44:27.033 STDOUT tofu: - Installed hashicorp/local v2.5.2 (signed, key ID 0C0AF313E5FD9F80)
18:44:27.033 STDOUT tofu: Providers are signed by their developers.
18:44:27.033 STDOUT tofu: If you'd like to know more about provider signing, you can read about it here:
18:44:27.033 STDOUT tofu: https://opentofu.org/docs/cli/plugins/signing/
18:44:27.034 STDOUT tofu: OpenTofu has created a lock file .terraform.lock.hcl to record the provider
18:44:27.034 STDOUT tofu: selections it made above. Include this file in your version control repository
18:44:27.034 STDOUT tofu: so that OpenTofu can guarantee to make the same selections by default when
18:44:27.034 STDOUT tofu: you run "tofu init" in the future.
18:44:27.034 STDOUT tofu: OpenTofu has been successfully initialized!
18:44:27.035 STDOUT tofu: 
You may now begin working with OpenTofu. Try running "tofu plan" to see
18:44:27.035 STDOUT tofu: any changes that are required for your infrastructure. All OpenTofu commands
18:44:27.035 STDOUT tofu: should now work.
18:44:27.035 STDOUT tofu: If you ever set or change modules or backend configuration for OpenTofu,
18:44:27.035 STDOUT tofu: rerun this command to reinitialize your working directory. If you forget, other
18:44:27.035 STDOUT tofu: commands will detect it and remind you to do so if necessary.
18:44:27.362 STDOUT tofu: OpenTofu used the selected providers to generate the following execution
18:44:27.362 STDOUT tofu: plan. Resource actions are indicated with the following symbols:
18:44:27.362 STDOUT tofu:   + create
18:44:27.362 STDOUT tofu: OpenTofu will perform the following actions:
18:44:27.362 STDOUT tofu:   # local_file.file will be created
18:44:27.362 STDOUT tofu:   + resource "local_file" "file" {
18:44:27.362 STDOUT tofu:       + content              = "Hello, World!"
18:44:27.362 STDOUT tofu:       + content_base64sha256 = (known after apply)
18:44:27.362 STDOUT tofu:       + content_base64sha512 = (known after apply)
18:44:27.362 STDOUT tofu:       + content_md5          = (known after apply)
18:44:27.362 STDOUT tofu:       + content_sha1         = (known after apply)
18:44:27.362 STDOUT tofu:       + content_sha256       = (known after apply)
18:44:27.362 STDOUT tofu:       + content_sha512       = (known after apply)
18:44:27.362 STDOUT tofu:       + directory_permission = "0777"
18:44:27.362 STDOUT tofu:       + file_permission      = "0777"

```

--------------------------------

### Install Terragrunt on macOS with Homebrew

Source: https://docs.terragrunt.com/getting-started/install

Use Homebrew to install Terragrunt on macOS.

```bash
brew install terragrunt
```

--------------------------------

### Create and Initialize Git Repository

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/setup

Use these bash commands to create a new directory for your project and initialize it as a Git repository.

```bash
mkdir terralith-to-terragrunt
cd terralith-to-terragrunt
git init
```

--------------------------------

### Install Terragrunt on Windows with Chocolatey

Source: https://docs.terragrunt.com/getting-started/install

Use Chocolatey to install Terragrunt on Windows systems.

```bash
choco install terragrunt
```

--------------------------------

### Create prod directory

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/step-4-breaking-the-terralith

Create a top-level directory for the 'prod' environment within the 'live' directory.

```bash
mkdir prod
```

--------------------------------

### Terragrunt Bare Include Example

Source: https://docs.terragrunt.com/migrate/bare-include

This is an example of a bare include in a Terragrunt configuration file.

```hcl
include {
    path = find_in_parent_folders("root.hcl")
}
```

--------------------------------

### Install Terragrunt on Arch Linux with Pacman

Source: https://docs.terragrunt.com/getting-started/install

Use pacman to install Terragrunt on Arch Linux.

```bash
pacman -S terragrunt
```

--------------------------------

### Initialize and Plan Changes

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/step-2-refactoring

Runs `tofu init` to re-initialize the project after introducing modules, followed by `tofu plan` to preview changes. This step is crucial for detecting unintended infrastructure modifications.

```bash
$ tofu init
$ tofu plan
...
Plan: 11 to add, 0 to change, 11 to destroy.
...
```

--------------------------------

### Install Terragrunt Autocomplete

Source: https://docs.terragrunt.com/getting-started/install

Install the autocomplete package for Terragrunt commands. This requires restarting your shell afterward.

```bash
terragrunt --install-autocomplete
```

--------------------------------

### Terragrunt Named Include Example

Source: https://docs.terragrunt.com/migrate/bare-include

This is an example of a named include, the recommended alternative to bare includes in Terragrunt.

```hcl
include "root" {
    path = find_in_parent_folders("root.hcl")
}
```

--------------------------------

### Example Environment Configuration

Source: https://docs.terragrunt.com/features/units/includes

This is an example of a Terragrunt configuration for a specific environment (qa/app) before refactoring for DRY principles.

```hcl
include "root" {
  path = find_in_parent_folders("root.hcl")
}


terraform {
  source = "github.com/<org>/modules.git//app?ref=v0.1.0"
}


dependency "vpc" {
  config_path = "../vpc"
}


dependency "mysql" {
  config_path = "../mysql"
}


inputs = {
  env            = "qa"
  basename       = "example-app"
  vpc_id         = dependency.vpc.outputs.vpc_id
  subnet_ids     = dependency.vpc.outputs.subnet_ids
  mysql_endpoint = dependency.mysql.outputs.endpoint
}
```

--------------------------------

### Initialize Terraform with State Migration

Source: https://docs.terragrunt.com/guides/terralith-to-terragrunt/step-4-breaking-the-terralith

Use `tofu init -migrate-state` to initialize the backend and migrate existing state to the new configuration.

```bash
tofu init -migrate-state


Initializing the backend...
Backend configuration changed!


OpenTofu has detected that the configuration specified for the backend
has changed. OpenTofu will now check for existing state in the backends.


Do you want to copy existing state to the new backend?
Pre-existing state was found while migrating the previous "s3" backend to the
newly configured "s3" backend. No existing state was found in the newly
configured "s3" backend. Do you want to copy this state to the new "s3"
backend? Enter "yes" to copy and "no" to start with an empty state.


Enter a value: yes


Successfully configured the backend "s3"! OpenTofu will automatically
use this backend unless the backend configuration changes.
```

--------------------------------

### Example .terragrunt-catalog-ignore file

Source: https://docs.terragrunt.com/features/catalog/tui

This example demonstrates how to use patterns in a .terragrunt-catalog-ignore file to exclude directories and specific subpaths from catalog discovery. It shows common use cases like ignoring an entire 'examples' directory and selectively keeping certain paths within a 'test' directory.

```plaintext
# Keep examples out of the catalog.
examples
examples/**


# Skip everything under test/ except test/keep.
test/**
!test/keep
```

--------------------------------

### Progressive Rollout with --working-dir

Source: https://docs.terragrunt.com/features/units/includes

Implement a promotion workflow by using --working-dir to scope updates to specific environments sequentially. This allows for controlled rollouts and validation at each stage.

```bash
# Roll out the change to the qa environment first
terragrunt run --all plan --queue-include-units-reading _env/app.hcl --working-dir qa
terragrunt run --all apply --queue-include-units-reading _env/app.hcl --working-dir qa
# If the apply succeeds to qa, move on to the stage environment
terragrunt run --all plan --queue-include-units-reading _env/app.hcl --working-dir stage
terragrunt run --all apply --queue-include-units-reading _env/app.hcl --working-dir stage
# And finally, prod.
terragrunt run --all plan --queue-include-units-reading _env/app.hcl --working-dir prod
terragrunt run --all apply --queue-include-units-reading _env/app.hcl --working-dir prod
```

--------------------------------

### Download Latest Tip Build by Platform

Source: https://docs.terragrunt.com/process/releases

Downloads the `.tar.gz` archive for the latest tip build, tailored for a specific operating system and architecture.

```APIDOC
## GET /api/v1/tip/latest/download?os=<os>&arch=<arch>

### Description
Redirects to the `.tar.gz` archive for the given OS and architecture for the latest tip build.

### Method
GET

### Endpoint
/api/v1/tip/latest/download

### Query Parameters
- **os** (string) - Required - The operating system (e.g., linux, darwin, windows).
- **arch** (string) - Required - The architecture (e.g., amd64, arm64).

### Request Example
```bash
curl -L -o terragrunt.tar.gz \
  "https://builds.terragrunt.com/api/v1/tip/latest/download?os=linux&arch=amd64"
```
```

--------------------------------

### Install a specific Terragrunt version with asdf

Source: https://docs.terragrunt.com/getting-started/install

Use asdf to install and manage specific versions of Terragrunt. This is useful for pinning versions in projects.

```bash
asdf plugin add terragrunt
asdf install terragrunt v0.99.0
```

--------------------------------

### Install a specific Terragrunt version with mise

Source: https://docs.terragrunt.com/getting-started/install

Use mise to install and manage specific versions of Terragrunt. This is useful for pinning versions in projects.

```bash
mise install terragrunt v0.99.0
```

--------------------------------

### Download Tip Build by Commit SHA and Platform

Source: https://docs.terragrunt.com/process/releases

Downloads the `.tar.gz` archive for a specific tip build (identified by commit SHA), tailored for a given operating system and architecture.

```APIDOC
## GET /api/v1/tip/{ref}/download?os=<os>&arch=<arch>

### Description
Redirects to the `.tar.gz` archive for the given OS and architecture for a specific tip build.

### Method
GET

### Endpoint
/api/v1/tip/{ref}/download

### Path Parameters
- **ref** (string) - Required - The commit SHA of the tip build.

### Query Parameters
- **os** (string) - Required - The operating system (e.g., linux, darwin, windows).
- **arch** (string) - Required - The architecture (e.g., amd64, arm64).

### Request Example
```bash
curl -L -o terragrunt.tar.gz \
  "https://builds.terragrunt.com/api/v1/tip/abc123def456/download?os=darwin&arch=arm64"
```
```