1 files changed, 196 insertions, 0 deletions
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..f39546c
--- /dev/null
+++ b/main.go
@@ -0,0 +1,196 @@
+package main
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"github.com/Fuwn/kivia/internal/analyze"
+	"github.com/Fuwn/kivia/internal/collect"
+	"github.com/Fuwn/kivia/internal/report"
+	"os"
+	"slices"
+	"strings"
+)
+
+type options struct {
+	Path                    string
+	OmitContext             bool
+	MinimumEvaluationLength int
+	Format                  string
+	FailOnViolation         bool
+	Ignore                  []string
+}
+
+func parseOptions(arguments []string) (options, error) {
+	flagSet := flag.NewFlagSet("kivia", flag.ContinueOnError)
+
+	flagSet.SetOutput(os.Stderr)
+
+	var parsed options
+	var ignoreValues stringSliceFlag
+
+	flagSet.StringVar(&parsed.Path, "path", "./...", "Path to analyze (directory, file, or ./...).")
+	flagSet.BoolVar(&parsed.OmitContext, "omit-context", false, "Hide usage context in output.")
+	flagSet.IntVar(&parsed.MinimumEvaluationLength, "min-eval-length", 1, "Minimum identifier length in runes to evaluate.")
+	flagSet.StringVar(&parsed.Format, "format", "text", "Output format: text or JSON.")
+	flagSet.BoolVar(&parsed.FailOnViolation, "fail-on-violation", false, "Exit with code 1 when violations are found.")
+	flagSet.Var(&ignoreValues, "ignore", "Ignore violations by matcher. Repeat this flag as needed. Prefixes: name=, kind=, file=, reason=, func=.")
+
+	if err := flagSet.Parse(arguments); err != nil {
+		return options{}, err
+	}
+
+	if parsed.MinimumEvaluationLength < 1 {
+		return options{}, errors.New("The --min-eval-length value must be at least 1.")
+	}
+
+	parsed.Ignore = slices.Clone(ignoreValues)
+
+	return parsed, nil
+}
+
+func run(parsed options) error {
+	identifiers, err := collect.FromPath(parsed.Path)
+
+	if err != nil {
+		return err
+	}
+
+	result, err := analyze.Run(identifiers, analyze.Options{
+		MinEvaluationLength: parsed.MinimumEvaluationLength,
+	})
+
+	if err != nil {
+		return err
+	}
+
+	result = applyIgnoreFilters(result, parsed.Ignore)
+
+	if err := report.Render(os.Stdout, result, parsed.Format, !parsed.OmitContext); err != nil {
+		return err
+	}
+
+	if parsed.FailOnViolation && len(result.Violations) > 0 {
+		return exitCodeError(1)
+	}
+
+	return nil
+}
+
+func main() {
+	parsed, err := parseOptions(os.Args[1:])
+
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(2)
+	}
+
+	if err := run(parsed); err != nil {
+		var codeError exitCodeError
+
+		if errors.As(err, &codeError) {
+			os.Exit(int(codeError))
+		}
+
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(1)
+	}
+}
+
+type exitCodeError int
+
+func (errorCode exitCodeError) Error() string {
+	return fmt.Sprintf("Process exited with code %d.", int(errorCode))
+}
+
+type stringSliceFlag []string
+
+func (values *stringSliceFlag) String() string {
+	if values == nil {
+		return ""
+	}
+
+	return strings.Join(*values, ",")
+}
+
+func (values *stringSliceFlag) Set(value string) error {
+	trimmed := strings.TrimSpace(value)
+
+	if trimmed == "" {
+		return errors.New("Ignore matcher cannot be empty.")
+	}
+
+	*values = append(*values, trimmed)
+
+	return nil
+}
+
+func applyIgnoreFilters(result analyze.Result, ignoreMatchers []string) analyze.Result {
+	if len(ignoreMatchers) == 0 || len(result.Violations) == 0 {
+		return result
+	}
+
+	filteredViolations := make([]analyze.Violation, 0, len(result.Violations))
+
+	for _, violation := range result.Violations {
+		if shouldIgnoreViolation(violation, ignoreMatchers) {
+			continue
+		}
+
+		filteredViolations = append(filteredViolations, violation)
+	}
+
+	result.Violations = filteredViolations
+
+	return result
+}
+
+func shouldIgnoreViolation(violation analyze.Violation, ignoreMatchers []string) bool {
+	for _, matcher := range ignoreMatchers {
+		if matchesViolation(matcher, violation) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func matchesViolation(matcher string, violation analyze.Violation) bool {
+	normalizedMatcher := strings.ToLower(strings.TrimSpace(matcher))
+
+	if normalizedMatcher == "" {
+		return false
+	}
+
+	identifier := violation.Identifier
+
+	if strings.HasPrefix(normalizedMatcher, "name=") {
+		return strings.Contains(strings.ToLower(identifier.Name), strings.TrimPrefix(normalizedMatcher, "name="))
+	}
+
+	if strings.HasPrefix(normalizedMatcher, "kind=") {
+		return strings.Contains(strings.ToLower(identifier.Kind), strings.TrimPrefix(normalizedMatcher, "kind="))
+	}
+
+	if strings.HasPrefix(normalizedMatcher, "file=") {
+		return strings.Contains(strings.ToLower(identifier.File), strings.TrimPrefix(normalizedMatcher, "file="))
+	}
+
+	if strings.HasPrefix(normalizedMatcher, "reason=") {
+		return strings.Contains(strings.ToLower(violation.Reason), strings.TrimPrefix(normalizedMatcher, "reason="))
+	}
+
+	if strings.HasPrefix(normalizedMatcher, "func=") {
+		return strings.Contains(strings.ToLower(identifier.Context.EnclosingFunction), strings.TrimPrefix(normalizedMatcher, "func="))
+	}
+
+	composite := strings.ToLower(strings.Join([]string{
+		identifier.Name,
+		identifier.Kind,
+		identifier.File,
+		violation.Reason,
+		identifier.Context.EnclosingFunction,
+	}, " "))
+
+	return strings.Contains(composite, normalizedMatcher)
+}