148 lines
3.1 KiB
Go
148 lines
3.1 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
|
|
"strings"
|
|
|
|
"github.com/jessevdk/go-flags"
|
|
"github.com/kylelemons/godebug/pretty"
|
|
"github.com/logrusorgru/aurora"
|
|
"github.com/mattn/go-isatty"
|
|
"gopkg.in/yaml.v2"
|
|
)
|
|
|
|
var version = "latest"
|
|
|
|
func main() {
|
|
var opts struct {
|
|
NoColor bool `long:"no-color" description:"disable colored output" required:"false"`
|
|
Version func() `long:"version" description:"print version and exit"`
|
|
// Ignore []string `long:"ignore" description:"ignore vaules by yaml path" required:"false"`
|
|
}
|
|
|
|
opts.Version = func() {
|
|
fmt.Fprintf(os.Stderr, "%v\n", version)
|
|
os.Exit(0)
|
|
}
|
|
|
|
args, err := flags.Parse(&opts)
|
|
if err != nil {
|
|
if err.(*flags.Error).Type == flags.ErrHelp {
|
|
os.Exit(0)
|
|
}
|
|
os.Exit(1)
|
|
}
|
|
if len(args) != 2 {
|
|
fmt.Println("requires exactly two arguments to diff, use `yamldiff <file1> <file2>`")
|
|
os.Exit(1)
|
|
}
|
|
|
|
formatter := newFormatter(opts.NoColor)
|
|
|
|
errors := stat(args[0], args[1])
|
|
failOnErr(formatter, errors...)
|
|
|
|
yaml1, err := unmarshal(args[0])
|
|
if err != nil {
|
|
failOnErr(formatter, err)
|
|
}
|
|
yaml2, err := unmarshal(args[1])
|
|
if err != nil {
|
|
failOnErr(formatter, err)
|
|
}
|
|
|
|
diff, ndiff := computeDiff(formatter, yaml1, yaml2)
|
|
if ndiff > 0 {
|
|
fmt.Println(diff)
|
|
os.Exit(2)
|
|
}
|
|
}
|
|
|
|
func stat(filenames ...string) []error {
|
|
var errs []error
|
|
for _, filename := range filenames {
|
|
if filename == "-" {
|
|
continue
|
|
}
|
|
_, err := os.Stat(filename)
|
|
if err != nil {
|
|
errs = append(errs, fmt.Errorf("cannot find file: %v. Does it exist?", filename))
|
|
}
|
|
}
|
|
return errs
|
|
}
|
|
|
|
func unmarshal(filename string) (interface{}, error) {
|
|
var contents []byte
|
|
var err error
|
|
if filename == "-" {
|
|
contents, err = io.ReadAll(os.Stdin)
|
|
} else {
|
|
contents, err = os.ReadFile(filename)
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var ret interface{}
|
|
err = yaml.Unmarshal(contents, &ret)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return ret, nil
|
|
}
|
|
|
|
func failOnErr(formatter aurora.Aurora, errs ...error) {
|
|
if len(errs) == 0 {
|
|
return
|
|
}
|
|
var errMessages []string
|
|
for _, err := range errs {
|
|
errMessages = append(errMessages, err.Error())
|
|
}
|
|
fmt.Fprintf(os.Stderr, "%v\n\n", formatter.Red(strings.Join(errMessages, "\n")))
|
|
os.Exit(1)
|
|
}
|
|
|
|
func computeDiff(formatter aurora.Aurora, a interface{}, b interface{}) (string, int) {
|
|
diffs := make([]string, 0)
|
|
ndiffs := 0
|
|
for _, s := range strings.Split(pretty.Compare(a, b), "\n") {
|
|
switch {
|
|
case strings.HasPrefix(s, "+"):
|
|
diffs = append(diffs, formatter.Bold(formatter.Green(s)).String())
|
|
ndiffs += 1
|
|
case strings.HasPrefix(s, "-"):
|
|
diffs = append(diffs, formatter.Bold(formatter.Red(s)).String())
|
|
ndiffs += 1
|
|
default:
|
|
diffs = append(diffs, s)
|
|
}
|
|
}
|
|
return strings.Join(diffs, "\n"), ndiffs
|
|
}
|
|
|
|
func newFormatter(noColor bool) aurora.Aurora {
|
|
var formatter aurora.Aurora
|
|
if noColor || !isTerminal() {
|
|
formatter = aurora.NewAurora(false)
|
|
} else {
|
|
formatter = aurora.NewAurora(true)
|
|
}
|
|
return formatter
|
|
}
|
|
|
|
func isTerminal() bool {
|
|
fd := os.Stdout.Fd()
|
|
switch {
|
|
case isatty.IsTerminal(fd):
|
|
return true
|
|
case isatty.IsCygwinTerminal(fd):
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|