yq golang

go.mod

module git.i.mercedes-benz.com/mlechel/test

go 1.22.1

require github.com/mikefarah/yq/v4 v4.43.1

require (
	github.com/a8m/envsubst v1.4.2 // indirect
	github.com/alecthomas/participle/v2 v2.1.1 // indirect
	github.com/dimchansky/utfbom v1.1.1 // indirect
	github.com/elliotchance/orderedmap v1.5.1 // indirect
	github.com/fatih/color v1.16.0 // indirect
	github.com/goccy/go-json v0.10.2 // indirect
	github.com/goccy/go-yaml v1.11.3 // indirect
	github.com/jinzhu/copier v0.4.0 // indirect
	github.com/magiconair/properties v1.8.7 // indirect
	github.com/mattn/go-colorable v0.1.13 // indirect
	github.com/mattn/go-isatty v0.0.20 // indirect
	github.com/pelletier/go-toml/v2 v2.2.0 // indirect
	github.com/yuin/gopher-lua v1.1.1 // indirect
	golang.org/x/net v0.22.0 // indirect
	golang.org/x/sys v0.18.0 // indirect
	golang.org/x/text v0.14.0 // indirect
	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
	gopkg.in/op/go-logging.v1 v1.0.0-20160211212156-b2cb9fa56473 // indirect
	gopkg.in/yaml.v3 v3.0.1 // indirect
)

main.go

package main

import (
	"fmt"
	"os"

	"github.com/mikefarah/yq/v4/pkg/yqlib"
	gologging "gopkg.in/op/go-logging.v1"
)

func init() {
	gologging.SetLevel(gologging.CRITICAL, "yq-lib")
	yqlib.InitExpressionParser()
}

func main() {
	expression := ".hello.world"
	yamlContent := `foo: bar

hello:
  world: tm
`

	stringEvaluator := yqlib.NewStringEvaluator()

	pref := yqlib.NewDefaultYamlPreferences()
	out, err := stringEvaluator.Evaluate(expression, yamlContent, yqlib.NewYamlEncoder(pref), yqlib.NewYamlDecoder(pref))
	if err != nil {
		fmt.Println("no matches found")
		os.Exit(4)
	}
	fmt.Println(out)
}