terraform-azurerm-set-diff-analyzer

par github

We need to translate the given text from English to French. The text describes a tool that identifies false-positive diffs in Terraform AzureRM plans due to Set-type attribute ordering. It mentions specific Azure resources, Python 3.8+, standard library, CI/CD integration, etc. We must preserve the name "terraform-azurerm-set-diff-analyzer" if it appears, but it does not appear in the provided text. The text is inside <text> tags. We should translate only the text, not add any labels or extra commentary. The target language is French. Let's translate: "Identify false-positive diffs in Terraform AzureRM plans caused by Set-type attribute ordering." -> "Identifiez les faux positifs dans les plans Terraform AzureRM causés par l'ordre des attributs de type Set." "Analyzes terraform plan JSON output to distinguish spurious diffs (element reordering in Sets) from actual resource changes" -> "Analyse la sortie JSON du plan terraform pour distinguer les différences parasites (réorganisation des

npx skills add https://github.com/github/awesome-copilot --skill terraform-azurerm-set-diff-analyzer

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Terraform AzureRM Set Diff Analyzer

A skill to identify "false-positive diffs" in Terraform plans caused by AzureRM Provider's Set-type attributes and distinguish them from actual changes.

When to Use

terraform plan shows many changes, but you only added/removed a single element
Application Gateway, Load Balancer, NSG, etc. show "all elements changed"
You want to automatically filter false-positive diffs in CI/CD

Background

Terraform's Set type compares by position rather than by key, so when adding or removing elements, all elements appear as "changed". This is a general Terraform issue, but it's particularly noticeable with AzureRM resources that heavily use Set-type attributes like Application Gateway, Load Balancer, and NSG.

These "false-positive diffs" don't actually affect the resources, but they make reviewing terraform plan output difficult.

Prerequisites

Python 3.8+

If Python is unavailable, install via your package manager (e.g., apt install python3, brew install python3) or from python.org.

Basic Usage

# 1. Generate plan JSON output
terraform plan -out=plan.tfplan
terraform show -json plan.tfplan > plan.json

# 2. Analyze
python scripts/analyze_plan.py plan.json

Troubleshooting

python: command not found: Use python3 instead, or install Python
ModuleNotFoundError: Script uses only standard library; ensure Python 3.8+