yq/cmd/evaluate_all_command.go
2020-11-30 16:35:21 +11:00

92 lines
2.4 KiB
Go

package cmd
import (
"errors"
"fmt"
"os"
"github.com/mikefarah/yq/v4/pkg/yqlib"
"github.com/spf13/cobra"
)
func createEvaluateAllCommand() *cobra.Command {
var cmdEvalAll = &cobra.Command{
Use: "eval-all [expression] [yaml_file1]...",
Aliases: []string{"ea"},
Short: "Loads _all_ yaml documents of _all_ yaml files and runs expression once",
Example: `
yq es '.a.b | length' file1.yml file2.yml
yq es < sample.yaml
yq es -n '{"a": "b"}'
`,
Long: "Evaluate All:\nUseful when you need to run an expression across several yaml documents or files. Consumes more memory than eval",
RunE: evaluateAll,
}
return cmdEvalAll
}
func evaluateAll(cmd *cobra.Command, args []string) error {
cmd.SilenceUsage = true
// 0 args, read std in
// 1 arg, null input, process expression
// 1 arg, read file in sequence
// 2+ args, [0] = expression, file the rest
var err error
stat, _ := os.Stdin.Stat()
pipingStdIn := (stat.Mode() & os.ModeCharDevice) == 0
out := cmd.OutOrStdout()
fileInfo, _ := os.Stdout.Stat()
if forceColor || (!forceNoColor && (fileInfo.Mode()&os.ModeCharDevice) != 0) {
colorsEnabled = true
}
if writeInplace && len(args) < 2 {
return fmt.Errorf("Write inplace flag only applicable when giving an expression and at least one file")
}
if writeInplace {
// only use colors if its forced
colorsEnabled = forceColor
writeInPlaceHandler := yqlib.NewWriteInPlaceHandler(args[1])
out, err = writeInPlaceHandler.CreateTempFile()
if err != nil {
return err
}
// need to indirectly call the function so that completedSuccessfully is
// passed when we finish execution as opposed to now
defer func() { writeInPlaceHandler.FinishWriteInPlace(completedSuccessfully) }()
}
printer := yqlib.NewPrinter(out, outputToJSON, unwrapScalar, colorsEnabled, indent, !noDocSeparators)
allAtOnceEvaluator := yqlib.NewAllAtOnceEvaluator()
switch len(args) {
case 0:
if pipingStdIn {
err = allAtOnceEvaluator.EvaluateFiles("", []string{"-"}, printer)
} else {
cmd.Println(cmd.UsageString())
return nil
}
case 1:
if nullInput {
err = allAtOnceEvaluator.EvaluateFiles(args[0], []string{}, printer)
} else {
err = allAtOnceEvaluator.EvaluateFiles("", []string{args[0]}, printer)
}
default:
err = allAtOnceEvaluator.EvaluateFiles(args[0], args[1:], printer)
}
completedSuccessfully = err == nil
if err == nil && exitStatus && !printer.PrintedAnything() {
return errors.New("no matches found")
}
return err
}