ekristen/libnuke

// Package log provides a way to log messages to the screen with the appropriate coloring and formatting for readability
package log

import (
    "fmt"
    "sort"
    "strings"

    "github.com/fatih/color"

    "github.com/ekristen/libnuke/pkg/resource"
)

var (
    ReasonSkip            = *color.New(color.FgYellow)
    ReasonError           = *color.New(color.FgRed)
    ReasonRemoveTriggered = *color.New(color.FgGreen)
    ReasonWaitPending     = *color.New(color.FgBlue)
    ReasonWaitDependency  = *color.New(color.FgCyan)
    ReasonSuccess         = *color.New(color.FgGreen)
    ReasonHold            = *color.New(color.FgMagenta)
)

var (
    ColorRegion             = *color.New(color.Bold)
    ColorResourceType       = *color.New()
    ColorResourceID         = *color.New(color.Bold)
    ColorResourceProperties = *color.New(color.Italic)
)

// Sorted -- Format the resource properties in sorted order ready for printing.
// This ensures that multiple runs of aws-nuke produce stable output so
// that they can be compared with each other.
func Sorted(m map[string]string) string {
    keys := make([]string, 0, len(m))
    for k := range m {
        if strings.HasPrefix(k, "_") {
            continue
        }

        keys = append(keys, k)
    }
    sort.Strings(keys)
    sorted := make([]string, 0, len(m))
    for k := range keys {
        sorted = append(sorted, fmt.Sprintf("%s: %q", keys[k], m[keys[k]]))
    }
    return fmt.Sprintf("[%s]", strings.Join(sorted, ", "))
}

// Log prints the line to screen with the appropriate coloring and formatting for readability
func Log(scope, resourceType string, r resource.Resource, c color.Color, msg string) {
    ColorRegion.Printf("%s", scope)
    fmt.Printf(" - ")
    ColorResourceType.Print(resourceType)
    fmt.Printf(" - ")

    rString, ok := r.(resource.LegacyStringer)
    if ok {
        ColorResourceID.Print(rString.String())
        fmt.Printf(" - ")
    }

    rProp, ok := r.(resource.PropertyGetter)
    if ok {
        ColorResourceProperties.Print(Sorted(rProp.Properties()))
        fmt.Printf(" - ")
    }

    c.Printf("%s\n", msg)
}