How to Lint IPATool Code Using golangci-lint

IPATool uses golangci-lint version 2.9.0 to enforce Go code quality standards, requiring developers to install the tool locally, regenerate code using go generate, and execute golangci-lint run ./... against the repository's .golangci.yml configuration.

The majd/ipatool repository maintains strict code quality through automated linting. This guide provides the exact commands and configuration details needed to validate your changes locally before submitting a pull request.

Prerequisites

Ensure you have Go installed and the repository cloned. The linting process requires the .golangci.yml file present in the repository root, which defines the enabled linters (including ginkgolinter, godot, nlreturn, and wsl) and exclusion patterns for the cmd/ and pkg/ source directories.

Install golangci-lint at the CI-Pinned Version

The GitHub Actions workflow in .github/workflows/lint.yml pins the linter to version v2.9.0. Install this exact version to guarantee your local results match the CI environment:

go install github.com/golangci/golangci-lint/cmd/golangci-lint@v2.9.0

macOS users can alternatively use Homebrew (brew install golangci-lint), though specifying the version ensures consistency with the automated macos-latest runners.

Regenerate Auto-Generated Files

The CI pipeline runs go generate github.com/majd/ipatool/... before linting. Execute this step locally to ensure generated code is current:

go generate ./...

This command processes //go:generate directives throughout the cmd/ and pkg/ trees. Skipping this step causes the linter to validate stale generated code, producing false positives or missed violations.

Run the Linter Against the Codebase

Execute golangci-lint using the project configuration to analyze all packages:

golangci-lint run ./...

The tool reads rules from .golangci.yml and scans the entire module. The configuration enables specific linters that enforce comment formatting (godot), whitespace consistency (wsl, nlreturn), and Ginkgo test patterns (ginkgolinter).

Fix Reported Violations

When the linter detects issues, output appears similar to:

pkg/util/string.go:12:1: comment on exported function Stringify should be of the form "Stringify ..."

Resolve these by adjusting the source code to comply with the enabled rules. For documentation errors, ensure exported functions begin with the function name followed by a description. Re-run golangci-lint run ./... until the command exits with no errors.

CI/CD Integration

The automated pipeline defined in .github/workflows/lint.yml executes on macos-latest and performs three sequential steps: configuring the Go environment, running go generate ./..., and invoking golangci-lint run. Replicating this sequence locally prevents CI failures on pull requests.

Summary

• Install golangci-lint at version 2.9.0 to match the CI environment defined in .github/workflows/lint.yml
• Execute go generate ./... before linting to update auto-generated files in cmd/ and pkg/
• Run golangci-lint run ./... to validate code against the .golangci.yml configuration
• Address violations from linters including godot, nlreturn, wsl, and ginkgolinter
• Verify a clean lint report locally to ensure the macos-latest GitHub Actions workflow passes

Frequently Asked Questions

What version of golangci-lint does IPATool require?

The project pins golangci-lint to version 2.9.0 in .github/workflows/lint.yml. Installing this specific version via go install github.com/golangci/golangci-lint/cmd/golangci-lint@v2.9.0 ensures your local linting results match the CI exactly.

Why must I run go generate before linting?

The linter validates auto-generated source files located in cmd/ and pkg/. If you skip go generate ./..., these files may be out of sync with their templates, causing golangci-lint run to report spurious errors or miss actual import issues in generated interfaces.

Where are the linting rules configured in the repository?

All linting rules reside in the .golangci.yml file at the repository root. This configuration explicitly enables linters like ginkgolinter for test assertions and godot for comment punctuation, while defining exclusions for vendored dependencies.

How do I resolve "comment on exported function" errors?

These errors originate from the godot linter enforcing Go documentation conventions. Edit the offending file (such as pkg/util/string.go) to ensure the comment begins with the function name, for example // Stringify converts the input..., then re-run golangci-lint run ./... to confirm the fix.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}