gitlabhq/gitlab-shell

// Package main is the entry point for the GitLab Shell health check command.
package main

import (
    "fmt"
    "os"

    checkCmd "gitlab.com/gitlab-org/gitlab-shell/v14/cmd/gitlab-shell-check/command"
    "gitlab.com/gitlab-org/gitlab-shell/v14/internal/command"
    "gitlab.com/gitlab-org/gitlab-shell/v14/internal/command/readwriter"
    "gitlab.com/gitlab-org/gitlab-shell/v14/internal/config"
    "gitlab.com/gitlab-org/gitlab-shell/v14/internal/executable"
    "gitlab.com/gitlab-org/gitlab-shell/v14/internal/logger"
)

var (
    // Version is the current version of gitlab-shell
    Version = "(unknown version)" // Set at build time in the Makefile
    // BuildTime signifies the time the binary was build
    BuildTime = "19700101.000000" // Set at build time in the Makefile
)

func main() {
    os.Exit(run())
}

func run() int {
    command.CheckForVersionFlag(os.Args, Version, BuildTime)

    readWriter := &readwriter.ReadWriter{
        Out:    &readwriter.CountingWriter{W: os.Stdout},
        In:     os.Stdin,
        ErrOut: os.Stderr,
    }

    exitOnError := func(err error, message string) int {
        if err != nil {
            _, _ = fmt.Fprintf(readWriter.ErrOut, "%s: %v\n", message, err)
            return 1
        }
        return 0
    }

    executable, err := executable.New(executable.Healthcheck)
    if code := exitOnError(err, "Failed to determine executable, exiting"); code != 0 {
        return code
    }

    config, err := config.NewFromDirExternal(executable.RootDir)
    if code := exitOnError(err, "Failed to read config, exiting"); code != 0 {
        return code
    }

    logCloser := logger.Configure(config)
    defer logCloser.Close() //nolint:errcheck

    cmd, err := checkCmd.New(config, readWriter)
    if code := exitOnError(err, "Failed to create command"); code != 0 {
        return code
    }

    ctx, finished := command.Setup(executable.Name, config)
    defer finished()

    if _, err = cmd.Execute(ctx); err != nil {
        _, _ = fmt.Fprintf(readWriter.ErrOut, "%v\n", err)
        return 1
    }
    return 0
}