main.go

// Copyright 2024 Oliver Eikemeier. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

//go:debug gotypesalias=1

// This is the main program for the zerolint linter.
package main

import (
	"flag"
	"fmt"
	"os"
	"runtime/debug"

	"fillmore-labs.com/zerolint/pkg/analyzer"
	"golang.org/x/tools/go/analysis/singlechecker"
)

func main() {
	a := analyzer.Analyzer
	addVersionFlag(&a.Flags)
	singlechecker.Main(analyzer.Analyzer)
}

func addVersionFlag(s *flag.FlagSet) {
	if s.Lookup("V") == nil {
		s.Var(versionFlag{}, "V", "print version and exit")
	}
}

type versionFlag struct{}

func (versionFlag) IsBoolFlag() bool { return true }
func (versionFlag) Get() any         { return nil }
func (versionFlag) String() string   { return "" }
func (versionFlag) Set(_ string) error {
	const progname = "zerolint"

	if bi, ok := debug.ReadBuildInfo(); ok {
		fmt.Printf("%s version %s build with %s\n",
			progname, bi.Main.Version, bi.GoVersion)
	} else {
		fmt.Printf("%s version (unknown)\n", progname)
	}

	os.Exit(0)

	return nil
}