⚙️ Configuration Reference (ATC Check Variants)

Skylint is an ATC-native static analysis engine. Configuration is handled entirely through standard SAP ATC Check Variants (CHKV), both inside SAP systems via Eclipse ADT and in automated workflows.

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🏛️ ATC Check Variant Architecture

In modern ABAP (SAP BTP ABAP Environment, SAP S/4HANA Cloud, and S/4HANA On-Premise 2022+), an ATC Check Variant (CHKV) is an ABAP repository object that defines:

1. Enabled Checks: Which check classes (ZCL_SKYLINT_*) are active during the inspection.
2. Finding Severities: The severity assigned to findings produced by each check (error, warning, note).
3. Check Parameters & Thresholds: Fine-tuned rule configurations (e.g., maximum method statements, nesting limits, allowed prefixes) defined via check attributes.

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🛠️ Configuring Checks in Eclipse ADT

When editing an ATC Check Variant in Eclipse ADT:

1. Enabling and Disabling Rules

• Expand the Skylint category in the Check Variant tree.
• Check the box next to any rule (ZCL_SKYLINT_*) to enable it, or uncheck to disable it.

2. Customizing Severity Levels

For each selected check, you can override its finding severity:

• Error: Fails quality gates and blocks transport releases in SAP CTS/gCTS.
• Warning: Flags non-compliant Clean ABAP code that developers should refactor.
• Note: Informational suggestion or lightweight recommendation.

3. Check Parameters & Thresholds

Checks with configurable attributes expose a Parameters tab in Eclipse ADT:

• Select the check in the variant editor.
• The parameter table displays all configurable fields (such as MAX_STATEMENTS, MAX_DEPTH, ALLOWED_PREFIXES).
• Modify the values directly; they are persisted as part of the CHKV object.

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📦 Default Variant (ZSKYLINT_DEFAULT)

Skylint includes a ready-to-use default ATC Check Variant definition located in:

src/atc/zskylint_default.chkv.json

This variant enables all Clean ABAP rules with production-tested thresholds and standard severities.

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🎨 Interactive Variant Builder

Skylint provides an interactive web-based Variant Builder in the documentation portal:

• Navigate to the Variant Builder.
• Select the categories and rules relevant to your team.
• Adjust parameter limits and thresholds visually.
• Export the configuration as an SAP ATC Check Variant (CHKV) JSON definition ready for import into your repository.