yq/cmd/compare.go
2020-02-03 16:37:53 +11:00

77 lines
2.3 KiB
Go

package cmd
import (
"bufio"
"bytes"
"strings"
"github.com/kylelemons/godebug/diff"
"github.com/mikefarah/yq/v3/pkg/yqlib"
errors "github.com/pkg/errors"
"github.com/spf13/cobra"
)
func createCompareCmd() *cobra.Command {
var cmdCompare = &cobra.Command{
Use: "compare [yaml_file_a] [yaml_file_b]",
Aliases: []string{"x"},
Short: "yq x [--prettyPrint/-P] dataA.yaml dataB.yaml 'b.e(name==fr*).value'",
Example: `
yq x - data2.yml # reads from stdin
yq x -pp dataA.yaml dataB.yaml '**' # compare paths
yq x -d1 dataA.yaml dataB.yaml 'a.b.c'
`,
Long: "Deeply compares two yaml files, prints the difference. Use with prettyPrint flag to ignore formatting differences.",
RunE: compareDocuments,
}
cmdCompare.PersistentFlags().StringVarP(&docIndex, "doc", "d", "0", "process document index number (0 based, * for all documents)")
cmdCompare.PersistentFlags().StringVarP(&printMode, "printMode", "p", "v", "print mode (v (values, default), p (paths), pv (path and value pairs)")
cmdCompare.PersistentFlags().StringVarP(&defaultValue, "defaultValue", "D", "", "default value printed when there are no results")
return cmdCompare
}
func compareDocuments(cmd *cobra.Command, args []string) error {
var path = ""
if len(args) < 2 {
return errors.New("Must provide at 2 yaml files")
} else if len(args) > 2 {
path = args[2]
}
var updateAll, docIndexInt, errorParsingDocIndex = parseDocumentIndex()
if errorParsingDocIndex != nil {
return errorParsingDocIndex
}
var matchingNodesA []*yqlib.NodeContext
var matchingNodesB []*yqlib.NodeContext
var errorDoingThings error
matchingNodesA, errorDoingThings = readYamlFile(args[0], path, updateAll, docIndexInt)
if errorDoingThings != nil {
return errorDoingThings
}
matchingNodesB, errorDoingThings = readYamlFile(args[1], path, updateAll, docIndexInt)
if errorDoingThings != nil {
return errorDoingThings
}
var dataBufferA bytes.Buffer
var dataBufferB bytes.Buffer
errorDoingThings = printResults(matchingNodesA, bufio.NewWriter(&dataBufferA))
if errorDoingThings != nil {
return errorDoingThings
}
errorDoingThings = printResults(matchingNodesB, bufio.NewWriter(&dataBufferB))
if errorDoingThings != nil {
return errorDoingThings
}
cmd.Print(diff.Diff(strings.TrimSuffix(dataBufferA.String(), "\n"), strings.TrimSuffix(dataBufferB.String(), "\n")))
cmd.Print("\n")
return nil
}