octomation/go-service

package main

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

    "github.com/fatih/color"
    "go.octolab.org/errors"
    "go.octolab.org/safe"
    "go.octolab.org/toolkit/cli/cobra"
    "go.octolab.org/unsafe"

    "go.octolab.org/template/service/internal/command"
    "go.octolab.org/template/service/internal/config"
)

const unknown = "unknown"

var (
    commit  = unknown
    date    = unknown
    version = "dev"
    exit    = os.Exit
    stderr  = color.Error
    stdout  = color.Output
)

func init() {
    if info, available := debug.ReadBuildInfo(); available && commit == unknown {
        version = info.Main.Version
        commit = fmt.Sprintf("%s, mod sum: %s", commit, info.Main.Sum)
    }
}

func main() {
    ctx, cancel := context.WithCancel(context.Background())
    defer cancel()

    cnf := new(config.Service)
    cnf.Build.Commit = commit
    cnf.Build.Date = date
    cnf.Build.Version = version

    root := command.NewClient(cnf)
    root.SetErr(stderr)
    root.SetOut(stdout)
    root.AddCommand(
        cobra.NewVersionCommand(version, date, commit, cnf.Build.Features...),
    )

    safe.Do(func() error { return root.ExecuteContext(ctx) }, shutdown)
}

func shutdown(err error) {
    var recovered errors.Recovered
    if errors.As(err, &recovered) {
        unsafe.DoSilent(fmt.Fprintf(stderr, "recovered: %+v\n", recovered.Cause()))
        unsafe.DoSilent(fmt.Fprintln(stderr, "---"))
        unsafe.DoSilent(fmt.Fprintf(stderr, "%+v\n", err))
    }
    exit(1)
}