usulnet/.golangci.yml at main · fr4nsys/usulnet · GitHub

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# =============================================================================
# usulnet - golangci-lint configuration
# =============================================================================
# Run: golangci-lint run ./...
# Docs: https://golangci-lint.run/usage/configuration/
# =============================================================================

run:
  timeout: 10m
  go: "1.25"
  tests: true
  # Skip generated files
  skip-dirs:
    - vendor
    - node_modules
  skip-files:
    - ".*_templ\\.go$"
    - ".*\\.gen\\.go$"

output:
  formats:
    - format: colored-line-number
  sort-results: true
  sort-order:
    - linter
    - severity
    - file

linters:
  enable:
    # Security
    - gosec          # Security issues
    # Bug detection
    - staticcheck    # Go static analysis (SA*, S*, ST*, QF* checks)
    - govet          # Go vet checks
    - errcheck       # Unchecked errors
    - ineffassign    # Unused assignments
    - unused         # Unused code (variables, functions, types)
    # Code quality
    - gocritic       # Go critic linter (opinionated but useful)
    - revive         # Drop-in replacement for golint
    - gofmt          # Go formatting
    - goimports      # Import organization
    # Performance
    - prealloc       # Slice preallocation hints
    # Error handling
    - nilerr         # nil error return after error check
    - errorlint      # Error wrapping best practices
    # Style
    - misspell       # Spelling mistakes in comments
    - unconvert      # Unnecessary type conversions
    - whitespace     # Whitespace issues

linters-settings:
  gosec:
    severity: medium
    confidence: medium
    excludes:
      - G101  # Hardcoded credentials (too many false positives with test files)
      - G104  # Audit errors not checked (covered by errcheck)
      - G304  # File path provided as taint input (needed for file operations)
    config:
      global:
        audit: false

  govet:
    enable-all: true
    disable:
      - fieldalignment  # Too noisy, minimal real impact
      - shadow          # Too noisy in large codebase

  errcheck:
    check-type-assertions: false
    check-blank: false
    exclude-functions:
      - io.Copy
      - io.WriteTo
      - (io.Closer).Close
      - (*os.File).Close
      - (net/http.ResponseWriter).Write
      - fmt.Fprintf
      - fmt.Fprintln

  staticcheck:
    checks:
      - all
      - -SA1019  # Deprecated usage (handle separately)

  gocritic:
    enabled-tags:
      - diagnostic
      - performance
    disabled-checks:
      - hugeParam        # Too aggressive for this codebase
      - rangeValCopy     # Often false positive with small structs
      - commentFormatting # Too noisy

  revive:
    rules:
      - name: exported
        disabled: true   # Too strict for initial adoption
      - name: unexported-return
        disabled: true
      - name: var-naming
        disabled: true   # Conflicts with existing naming conventions

  goimports:
    local-prefixes: github.com/fr4nsys/usulnet

  misspell:
    locale: US

  prealloc:
    simple: true
    range-loops: true
    for-loops: false      # Too many false positives in complex loops

issues:
  # Don't limit output
  max-issues-per-linter: 0
  max-same-issues: 0

  # Exclude test files from some strict checks
  exclude-rules:
    # Tests can use magic numbers and have longer functions
    - path: _test\.go
      linters:
        - gosec
        - errcheck
        - gocritic
        - prealloc

    # Generated templ files should be excluded
    - path: _templ\.go
      linters:
        - all

    # Migration files have long SQL strings
    - path: migrations/
      linters:
        - gocritic

    # Allow some patterns in handlers (they're verbose by design)
    - path: internal/api/handlers/
      linters:
        - gocritic
      text: "ifElseChain"

    # Main packages can have init()
    - path: cmd/
      linters:
        - gocritic
      text: "initClause"

  # Exclude common patterns
  exclude:
    # errcheck: Allow ignoring errors from response.Write
    - "Error return value of .((os\\.)?std(out|err)\\..*|.*Close|.*Flush|os\\.Remove(All)?|.*printf?|os\\.(Un)?Setenv). is not checked"
    # govet: Allow printf-like functions
    - "printf: non-constant format string"

severity:
  default-severity: warning
  rules:
    - linters:
        - gosec
      severity: error
    - linters:
        - govet
        - errcheck
      severity: error
    - linters:
        - misspell
        - whitespace
      severity: info