chore: adds root module example + more docs #1
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WalkthroughThe pull request introduces significant changes to a Terraform module repository, including renaming the repository, restructuring documentation, and adding new files. The Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant Terraform
participant RandomPetModule
User->>Terraform: Apply configuration
Terraform->>RandomPetModule: Create resource with length and prefix
RandomPetModule-->>Terraform: Return generated random pet name
Terraform-->>User: Display output
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (8)
root-module/versions.tf (1)
9-9: Consider tightening the Terraform version constraint.The current constraint
~> 1.0allows any 1.x version, which might be too permissive. Consider using a more specific constraint like~> 1.5to ensure compatibility while still allowing patch updates.- required_version = "~> 1.0" + required_version = "~> 1.5"terraform-random-pet/main.tf (1)
5-8: Consider adding module-specific best practices.While the current best practices are good, consider adding guidance specific to the random_pet resource usage and naming conventions.
root-module/providers.tf (1)
11-13: Consider documenting why the random provider block is empty.While the random provider might not need specific configuration, it would be helpful to add a comment explaining this.
provider "random" { - # Configuration options + # The random provider doesn't require any configuration options + # See: https://registry.terraform.io/providers/hashicorp/random/latest/docs }terraform-random-pet/variables.tf (3)
1-9: Consider enhancing documentation with examplesThe documentation header is well-structured and informative. Consider adding example usage for each variable to make it even more user-friendly.
# Best Practices: # - Descriptive variables: Use meaningful names and description attributes. # - Default values: Provide reasonable defaults when possible. For mandatory inputs, omit defaults to enforce explicit user input. # - Type constraints and validation: Use type constraints and validation blocks to catch incorrect inputs early. # - Group related variables: Organize variables logically, adding comments to separate sections if many variables exist. +# +# Examples: +# length = 2 # Creates a two-word pet name +# prefix = "dev" # Results in names like "dev-happy-elephant"
10-18: Consider adding upper bound validation for lengthWhile the current validation ensures positive numbers, consider adding an upper bound to prevent excessively long resource names.
variable "length" { description = "The length of the random name." type = number default = 2 validation { - condition = var.length > 0 - error_message = "The length must be a positive number." + condition = var.length > 0 && var.length <= 5 + error_message = "The length must be a positive number not exceeding 5." } }
20-24: Add validation for prefix formatConsider adding validation to ensure the prefix follows naming conventions and contains only valid characters.
variable "prefix" { description = "A string to prefix the name with." type = string default = null + validation { + condition = var.prefix == null || can(regex("^[a-zA-Z0-9-]*$", var.prefix)) + error_message = "The prefix must contain only alphanumeric characters and hyphens." + } }README.md (2)
1-9: Enhance module examples sectionWhile the links to example directories are helpful, consider adding quick-start examples directly in the README for better visibility.
Root module example is provided in [root-module](./root-module/) directory. +## Quick Start + +### Child Module Usage +```hcl +module "pet" { + source = "./terraform-random-pet" + length = 2 + prefix = "dev" +} +``` + +### Root Module Usage +```hcl +module "root" { + source = "./root-module" + length = 2 +} +``` + This README.md serves as the module's primary documentation and entry point.
21-31: Consider adding more context about providers.tfThe structure section mentions providers.tf is for root modules only, but it would be helpful to explain why and provide guidance on provider configuration.
├── outputs.tf ├── providers.tf (root module only) ├── variables.tf -└── versions.tf +└── versions.tf + +### About providers.tf +The `providers.tf` file in root modules is responsible for: +- Configuring provider authentication +- Setting provider-specific parameters +- Managing provider aliases + +Example: +```hcl +provider "aws" { + region = var.aws_region +} +```
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📒 Files selected for processing (16)
README.md(2 hunks)root-module/README.md(1 hunks)root-module/data.tf(1 hunks)root-module/example.auto.tfvars(1 hunks)root-module/main.tf(1 hunks)root-module/outputs.tf(1 hunks)root-module/providers.tf(1 hunks)root-module/variables.tf(1 hunks)root-module/versions.tf(1 hunks)terraform-random-pet/README.md(1 hunks)terraform-random-pet/data.tf(1 hunks)terraform-random-pet/main.tf(1 hunks)terraform-random-pet/outputs.tf(1 hunks)terraform-random-pet/variables.tf(1 hunks)terraform-random-pet/versions.tf(1 hunks)versions.tf(0 hunks)
💤 Files with no reviewable changes (1)
- versions.tf
✅ Files skipped from review due to trivial changes (9)
- root-module/example.auto.tfvars
- root-module/outputs.tf
- terraform-random-pet/data.tf
- terraform-random-pet/outputs.tf
- terraform-random-pet/README.md
- root-module/data.tf
- root-module/variables.tf
- terraform-random-pet/versions.tf
- root-module/README.md
🔇 Additional comments (3)
root-module/versions.tf (1)
1-7: LGTM! Well-documented best practices.
The comments provide clear guidance on version management and maintenance expectations.
terraform-random-pet/main.tf (1)
11-12: LGTM! Clean variable usage.
The addition of the prefix variable follows Terraform best practices for configuration flexibility.
root-module/providers.tf (1)
4-10: LGTM! Excellent security considerations.
The best practices section provides valuable guidance on secure provider configuration, especially regarding credential management.
Addressed the first batch of suggestions 👍 |
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Actionable comments posted: 4
🧹 Outside diff range and nitpick comments (4)
README.md (2)
5-7: Fix grammar in example directory referencesAdd the article "The" for better readability.
-Child module example is provided in [terraform-random-pet](./terraform-random-pet/) directory. +The child module example is provided in the [terraform-random-pet](./terraform-random-pet/) directory. -Root module example is provided in [root-module](./root-module/) directory. +The root module example is provided in the [root-module](./root-module/) directory.🧰 Tools
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14-14: Update remaining HashiCorp documentation link to OpenTofuFor consistency, update the HashiCorp documentation link to use OpenTofu documentation instead.
-- Usage Instructions: Include code snippets demonstrating how to call the module from a [root module](https://developer.hashicorp.com/terraform/language/modules#the-root-module). +- Usage Instructions: Include code snippets demonstrating how to call the module from a [root module](https://opentofu.org/docs/language/modules/#the-root-module).🧰 Tools
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terraform-random-pet/README.md (2)
24-24: Fix grammar in naming guidelinesAdd the article "the" for better readability.
-1. Keep name short and focused: While it should be descriptive, avoid overly long names. The goal is to convey the module's purpose concisely: +1. Keep the name short and focused: While it should be descriptive, avoid overly long names. The goal is to convey the module's purpose concisely:🧰 Tools
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[uncategorized] ~24-~24: Possible missing article found.
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46-48: Add specific version constraintThe comment suggests pinning to a specific version, but no version is specified. Consider adding a specific version constraint for better stability.
module "sandbox_pet" { source = "masterpointio/random/pet" - # We recommend to pin the specific version - # version = "X.X.X" + version = "0.1.0"
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README.md(2 hunks)root-module/README.md(1 hunks)terraform-random-pet/README.md(1 hunks)
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terraform-random-pet/README.md
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README.md
[uncategorized] ~6-~6: You might be missing the article “the” here.
Context: ...t](./terraform-random-pet/) directory. Root module example is provided in [root-mod...
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| ## Documentation Recommendations (DO NOT INCLUDE THIS INTO THE REAL README) | ||
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| - Module description: Briefly explain what the root module sets up (e.g., infrastructure for RDS Postgres instances). | ||
| - Use [terraform-docs](https://github.com/terraform-docs/terraform-docs) to ensure that variables, outputs, child module, and resource documentation is included. | ||
| - Maintain current information: Keep the README updated as the infrastructure evolves. |
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Remove documentation recommendations from template
The "Documentation Recommendations" section with the note "(DO NOT INCLUDE THIS INTO THE REAL README)" should not be part of the template itself. Consider moving these recommendations to a separate documentation guide or contributing guidelines document.
| # root-module | ||
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| This is a template root module. |
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🛠️ Refactor suggestion
Enhance the module description
The current description "This is a template root module" is too generic. Consider providing a more specific description that explains the purpose and functionality of this root module example.
-This is a template root module.
+# Example Root Module
+
+This root module demonstrates how to compose child modules together to create a complete infrastructure. It showcases best practices for:
+- Module composition
+- Variable management
+- Resource organization📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| # root-module | |
| This is a template root module. | |
| # root-module | |
| # Example Root Module | |
| This root module demonstrates how to compose child modules together to create a complete infrastructure. It showcases best practices for: | |
| - Module composition | |
| - Variable management | |
| - Resource organization |
terraform-random-pet/README.md
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| ## Documentation Recommendations (DO NOT INCLUDE THIS INTO THE REAL README) | ||
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| ### Naming | ||
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| The repository/directory name should follow this pattern: | ||
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| ```sh | ||
| terraform-<PROVIDER>-<NAME> | ||
| ``` | ||
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| Here’s what this means: | ||
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| 1. The repository should start with `terraform-` if your module should be [published to and discovered on the Registry](https://opentofu.org/docs/language/modules/develop/publish/). Even if you don’t intend to publish the module, following this pattern is a good practice that helps differentiate your Terraform child modules from other code in your projects. | ||
| 2. Include the provider name: After the prefix, specify the primary provider your module is for, such as aws, google, datadog, etc. | ||
| 3. Use descriptive name: Follow the provider name with a clear and concise identifier that describes the module’s purpose. | ||
| 4. Use hyphens to separate words. | ||
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| Also: | ||
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| 1. Keep name short and focused: While it should be descriptive, avoid overly long names. The goal is to convey the module’s purpose concisely: | ||
| - Good: terraform-aws-internal-lb | ||
| - Not so good: terraform-aws-internal-misc-module | ||
| - Too long: terraform-aws-internal-application-load-balancer-with-extra-rules | ||
| 2. Module names should reflect their purpose rather than environment-specific details. | ||
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Move documentation recommendations to a separate guide
The "Documentation Recommendations" section with naming guidelines should not be part of the template itself. Consider moving these recommendations to a separate documentation guide or contributing guidelines document.
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[uncategorized] ~24-~24: Possible missing article found.
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| # terraform-random-pet | ||
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| This is a template child module. |
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🛠️ Refactor suggestion
Enhance the module description
The current description "This is a template child module" is too generic. Consider providing a more specific description that explains the purpose and functionality of this random pet name generator module.
-This is a template child module.
+# Random Pet Name Generator Module
+
+This Terraform module generates random pet names that can be used as unique identifiers for your infrastructure resources. It supports customizable name length and optional prefixing for organizational purposes.📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| # terraform-random-pet | |
| This is a template child module. | |
| # terraform-random-pet | |
| # Random Pet Name Generator Module | |
| This Terraform module generates random pet names that can be used as unique identifiers for your infrastructure resources. It supports customizable name length and optional prefixing for organizational purposes. |
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@gberenice this looks great. Two larger requests:
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Let's move the per-file documentation surrounding purpose + examples from the files themselves and to the main README's "Structure" section. This way we remove some of the duplication and consumers of this template won't clone / copy those file descriptions into each file, which they'll then need to delete every time.
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Let's have a specific section in the root README on how to think about versioning. Here are my thoughts:
## Versioning TF + Providers
We’re particular about how we version providers and terraform in child modules and root modules — We recommend the following:
### Child Modules
Since child-modules are intended to be used many times throughout your code, it’s important to make it so that they create as little restrictions on the consuming consuming root module as possible. This means you should find the earliest versions of Terraform / OpenTofu and the providers that your code supports and then use the greater than or equal operator `>=` to make sure that consumers are at least using those versions. This enables Root Modules to choose and upgrade their TF and provider versions without needing their underlying child-modules to be updated.
### Root Modules
Root modules are intended to be planned and applied and therefore they should be more prescriptive so that they’re called consistently in each case that you instantiate a new root module instance (i.e. a state file). To accomplish that, you should do the following:
1. Explicitly pin the latest version of Terraform / OpenTofu that your Root Module supports. You’ll need to upgrade this version each time you want to use a new TF version across your code base.
2. Find the highest provider versions that your root module supports (e.g. AWS Provider `5.81.0`) and use [[the pessimistic version operator](https://developer.hashicorp.com/terraform/language/expressions/version-constraints#operators)](https://developer.hashicorp.com/terraform/language/expressions/version-constraints#operators) `~>` to make sure that you continue to get any bug fixes to that provider.
Doing the above ensures that you won’t easily introduce any break changes into the actual TF code that you’re applying and you won’t have inconsistencies show up when you run a `tofu init -upgrade`.
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README.md
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| - Best Practices: | ||
| - Descriptive variables: Use meaningful names and description attributes. | ||
| - Default values: Provide reasonable defaults when possible. For mandatory inputs, omit defaults to enforce explicit user input. | ||
| - Type vonstraints and validation: Use type constraints and validation blocks to catch incorrect inputs early. |
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| - Type vonstraints and validation: Use type constraints and validation blocks to catch incorrect inputs early. | |
| - Type constraints and validation: Use type constraints and validation blocks to catch incorrect inputs early. |
@Gowiem all addressed 👍 |
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (7)
terraform-random-pet/main.tf (1)
1-4: Consider adding variable validation and resource description.To improve maintainability and prevent potential issues:
- Add a description comment above the resource to document its purpose
- Consider adding validation blocks for the variables to enforce constraints
+# Creates a random pet name with a timestamp prefix for unique resource naming resource "random_pet" "template" { length = var.length prefix = var.prefix }And in your variables.tf file:
variable "length" { description = "The number of words in the pet name" type = number validation { condition = var.length > 0 error_message = "Length must be greater than 0." } } variable "prefix" { description = "A prefix to add to the pet name (typically a timestamp)" type = string validation { condition = can(regex("^[0-9]{8}", var.prefix)) error_message = "Prefix must start with 8 digits (YYYYMMDD format)." } }root-module/variables.tf (2)
1-4: Enhance variable documentation for clarity.The implementation looks good, but since this is a root module example, consider enhancing the description to be more specific about:
- The purpose (generating random pet names)
- The impact on the generated name
- Any constraints on the value
variable "length" { - description = "The length of the random name" + description = "The number of words to use in the generated pet name (e.g., length of 2 might generate 'happy-turtle')" type = number default = 2
5-8: Consider adding an upper bound validation.While validating for positive numbers is good, consider adding an upper bound to prevent excessively long pet names that might cause issues in resource naming.
validation { - condition = var.length > 0 - error_message = "The length must be a positive number." + condition = var.length > 0 && var.length <= 5 + error_message = "The length must be between 1 and 5 words." }terraform-random-pet/README.md (1)
36-54: Enhance the usage exampleThe usage example is good but could be improved by:
- Adding comments explaining the purpose of each variable
- Including more realistic values
- Showing how to reference the outputs in different scenarios
module "sandbox_pet" { source = "masterpointio/random/pet" # We recommend to pin the specific version # version = "X.X.X" - # Input variables - length = 2 - prefix = "sandbox" + # Number of words in the pet name (e.g., "happy-dog" has length=2) + length = 2 + + # Optional prefix for organizational or environment identification + prefix = "sandbox" } # Example outputs output "pet_name" { description = "The generated pet name, useful for unique resource naming" value = module.sandbox_pet.random_pet_name } +# Example: Use in resource names +resource "aws_s3_bucket" "example" { + bucket = module.sandbox_pet.random_pet_name + # ... other configuration ... +}README.md (3)
126-126: Fix duplicate wordThere's a duplicate word "consuming" in the sentence.
-Since child-modules are intended to be used many times throughout your code, it's important to make it so that they create as little restrictions on the consuming consuming root module as possible. +Since child-modules are intended to be used many times throughout your code, it's important to make it so that they create as little restrictions on the consuming root module as possible.🧰 Tools
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[duplication] ~126-~126: Possible typo: you repeated a word
Context: ...ey create as little restrictions on the consuming consuming root module as possible. This means yo...(ENGLISH_WORD_REPEAT_RULE)
180-180: Fix grammar in examples directory referenceThe article "an" cannot be used with the plural noun "examples".
-- Testing and Examples: Consider adding an examples/ directory with sample configurations and a test/ directory +- Testing and Examples: Consider adding examples/ directory with sample configurations and a test/ directory🧰 Tools
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[grammar] ~180-~180: The plural noun “examples” cannot be used with the article “an”. Did you mean “an example” or “examples”?
Context: ...- Testing and Examples: Consider adding an examples/ directory with sample configurations a...(A_NNS)
154-154: Add missing punctuationAdd commas to improve readability in compound sentences.
-Root modules are intended to be planned and applied and therefore they should be more prescriptive +Root modules are intended to be planned and applied, and therefore they should be more prescriptive -In this example Terraform is pinned exactly at 1.3.7 +In this example, Terraform is pinned exactly at 1.3.7Also applies to: 176-176
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[uncategorized] ~154-~154: Use a comma before ‘and’ if it connects two independent clauses (unless they are closely connected and short).
Context: ...s are intended to be planned and applied and therefore they should be more prescript...(COMMA_COMPOUND_SENTENCE)
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📒 Files selected for processing (13)
.trunk/configs/.markdownlint.yaml(1 hunks)README.md(2 hunks)root-module/README.md(1 hunks)root-module/example.auto.tfvars(1 hunks)root-module/main.tf(1 hunks)root-module/providers.tf(1 hunks)root-module/variables.tf(1 hunks)root-module/versions.tf(1 hunks)terraform-random-pet/README.md(1 hunks)terraform-random-pet/main.tf(1 hunks)terraform-random-pet/outputs.tf(1 hunks)terraform-random-pet/variables.tf(1 hunks)terraform-random-pet/versions.tf(1 hunks)
✅ Files skipped from review due to trivial changes (1)
- .trunk/configs/.markdownlint.yaml
🚧 Files skipped from review as they are similar to previous changes (6)
- root-module/providers.tf
- root-module/versions.tf
- root-module/example.auto.tfvars
- root-module/main.tf
- terraform-random-pet/variables.tf
- terraform-random-pet/versions.tf
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README.md
[uncategorized] ~6-~6: You might be missing the article “the” here.
Context: ...t](./terraform-random-pet/) directory. Root module example is provided in [root-mod...
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Context: ...ey create as little restrictions on the consuming consuming root module as possible. This means yo...
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[uncategorized] ~176-176: A comma might be missing here.> 5.81.0" } } } ``` In this example Terraform is pinned exactly at 1.3.7, t...
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terraform-random-pet/README.md
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Context: ...ch as aws, google, datadog, etc. 3. Use descriptive name: Follow the provider name with a c...
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🔇 Additional comments (4)
terraform-random-pet/main.tf (1)
1-4: LGTM! Clean and well-structured resource configuration.
The implementation follows Terraform best practices by using variables instead of hardcoded values.
terraform-random-pet/outputs.tf (1)
1-4: LGTM! Verify the referenced resource.
The output definition follows Terraform best practices with proper naming, description, and formatting.
Let's verify that the referenced resource exists:
✅ Verification successful
✅ Resource reference verified and valid
The output correctly references the random_pet.template resource which is properly defined in main.tf. The resource is configured to use the module's input variables for length and prefix, making this a valid and well-structured Terraform module.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Verify that the random_pet.template resource exists in the module
# Expected: Find the resource definition in main.tf or other .tf files
# Search for the random_pet resource named "template"
rg 'resource\s+"random_pet"\s+"template"\s+{' terraform-random-pet/
Length of output: 213
Script:
#!/bin/bash
# Let's try a simpler pattern to find the random_pet resource
rg 'resource "random_pet" "template"' terraform-random-pet/
# Also list all .tf files in the module to ensure we're searching in the right place
fd '\.tf$' terraform-random-pet/
# Let's see the content of any .tf files to understand the module structure
fd '\.tf$' terraform-random-pet/ -x cat {}
Length of output: 1030
root-module/README.md (1)
1-3: 🛠️ Refactor suggestion
Enhance the module description
The current description "This is a template root module" is too generic. Consider providing a more specific description that explains the purpose and functionality of this root module example.
-# root-module
-
-This is a template root module.
+# Example Root Module
+
+This root module demonstrates how to compose child modules together to create a complete infrastructure. It showcases:
+- Module composition and organization
+- Variable management and validation
+- Provider configuration best practicesLikely invalid or redundant comment.
terraform-random-pet/README.md (1)
1-3: 🛠️ Refactor suggestion
Enhance the module description
The current description "This is a template child module" is too generic. Consider providing a more specific description that explains the purpose and functionality of this random pet name generator module.
-# terraform-random-pet
-
-This is a template child module.
+# Random Pet Name Generator Module
+
+This Terraform module generates random pet names that can be used as unique identifiers for your infrastructure resources. It provides customizable name length and optional prefixing capabilities.Likely invalid or redundant comment.
| <!-- README TEMPLATE: AFTER READING THE BELOW SECTION, DELETE THE BELOW SECTION AND REPLACE WITH YOUR OWN CONTENT --> | ||
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| ## Documentation Recommendations (DO NOT INCLUDE THIS INTO THE REAL README) | ||
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| - Module description: Briefly explain what the root module sets up (e.g., infrastructure for RDS Postgres instances). | ||
| - Use [terraform-docs](https://github.com/terraform-docs/terraform-docs) to ensure that variables, outputs, child module, and resource documentation is included. | ||
| - Maintain current information: Keep the README updated as the infrastructure evolves. |
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🛠️ Refactor suggestion
Move documentation recommendations to a separate guide
The "Documentation Recommendations" section marked with "(DO NOT INCLUDE THIS INTO THE REAL README)" should be moved to a separate documentation guide or contributing guidelines document.
Consider creating a new file CONTRIBUTING.md in the repository root to house these guidelines.
| ## Documentation Recommendations (DO NOT INCLUDE THIS INTO THE REAL README) | ||
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| ### Naming | ||
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| The repository/directory name should follow this pattern: | ||
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| ```sh | ||
| [terraform-]<PROVIDER>-<NAME> | ||
| ``` | ||
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| Here’s what this means: | ||
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| 1. [If it's a separate repository] The repository should start with `terraform-` if your module should be [published to and discovered on the Registry](https://opentofu.org/docs/language/modules/develop/publish/). Even if you don’t intend to publish the module, following this pattern is a good practice that helps differentiate your Terraform child modules from other code in your projects. | ||
| 2. Include the provider name: Specify the primary provider your module is for, such as aws, google, datadog, etc. | ||
| 3. Use descriptive name: Follow the provider name with a clear and concise identifier that describes the module’s purpose. | ||
| 4. Use hyphens to separate words. | ||
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| Also: | ||
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| 1. Keep name short and focused: While it should be descriptive, avoid overly long names. The goal is to convey the module’s purpose concisely: | ||
| - Good: `terraform-aws-internal-lb`. | ||
| - Not so good: `terraform-aws-internal-misc-module`. | ||
| - Too long: `terraform-aws-internal-application-load-balancer-with-extra-rules`. | ||
| 2. Module names should reflect their purpose rather than environment-specific details. | ||
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🛠️ Refactor suggestion
Move naming guidelines to a separate guide
The comprehensive naming guidelines section should be moved to a separate documentation guide. While the information is valuable, it makes the module's README too lengthy and detracts from its primary purpose.
Consider moving this content to a new file docs/MODULE_NAMING.md in the repository root.
🧰 Tools
🪛 LanguageTool
[uncategorized] ~21-~21: You might be missing the article “a” here.
Context: ...ch as aws, google, datadog, etc. 3. Use descriptive name: Follow the provider name with a c...
(AI_EN_LECTOR_MISSING_DETERMINER_A)
[uncategorized] ~26-~26: Possible missing article found.
Context: ...hens to separate words. Also: 1. Keep name short and focused: While it should be d...
(AI_HYDRA_LEO_MISSING_THE)
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