burke/zeus

package zerror

import (
    "fmt"
    "os"
    "syscall"

    slog "github.com/burke/zeus/go/shinylog"
)

var finalOutput []func()

func Init() {
    finalOutput = make([]func(), 0)
}

func PrintFinalOutput() {
    for _, cb := range finalOutput {
        cb()
    }
}

// TODO: this is gross because code is ignored.
func ExitNow(code int, finalOuputCallback func()) {
    finalOutput = append(finalOutput, finalOuputCallback)
    proc, _ := os.FindProcess(os.Getpid())
    proc.Signal(syscall.SIGTERM)
}

func Error(msg string) {
    ExitNow(1, func() {
        slog.Red(msg)
    })
}

func ErrorCantConnectToMaster() {
    slog.StdErrorString("Can't connect to master. Run {yellow}zeus start{red} first.\r")
}

func ErrorConfigCommandCouldntStart(msg, output string) {
    ExitNow(1, func() {
        slog.Red("Failed to initialize application from {yellow}zeus.json{red}.")
        slog.Red("The json file is valid, but the {yellow}command{red} could not be started:\n\x1b[0m" + output)
    })
}

func ErrorConfigCommandCrashed(output string) {
    ExitNow(1, func() {
        slog.Red("Couldn't boot application. {yellow}command{red} terminated with this output:")
        fmt.Println(output)
    })
}

// The config file is loaded before any goroutines are launched that require cleanup,
// and our exitNow goroutine has not been spawned yet, so we will just explicitly exit
// in the json-related errors..
func ErrorConfigFileInvalidJSON() {
    if slog.Red("The config file {yellow}zeus.json{red} contains invalid JSON and could not be parsed.") {
        os.Exit(1)
    }
}

func ErrorConfigFileInvalidFormat() {
    if slog.Red("The config file {yellow}zeus.json{red} is not in the correct format.") {
        os.Exit(1)
    }
}

func ErrorCantCreateListener() {
    ExitNow(1, func() {
        slog.Red("It looks like Zeus is already running. If not, remove {yellow}.zeus.sock{red} and try again.")
    })
}

func ErrorUnableToAcceptSocketConnection() {
    slog.Red("Unable to accept socket connection.")
}