mirror of
https://github.com/mikefarah/yq.git
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68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package cmd
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import (
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"os"
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"github.com/mikefarah/yq/v4/pkg/yqlib"
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"github.com/spf13/cobra"
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)
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func createEvaluateSequenceCommand() *cobra.Command {
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var cmdEvalSequence = &cobra.Command{
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Use: "eval [expression] [yaml_file1]...",
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Aliases: []string{"e"},
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Short: "Apply expression to each document in each yaml file given in sequence",
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Example: `
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yq es '.a.b | length' file1.yml file2.yml
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yq es < sample.yaml
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yq es -n '{"a": "b"}'
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`,
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Long: "Evaluate Sequence:\nIterate over each yaml document, apply the expression and print the results, in sequence.",
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RunE: evaluateSequence,
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}
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return cmdEvalSequence
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}
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func evaluateSequence(cmd *cobra.Command, args []string) error {
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// 0 args, read std in
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// 1 arg, null input, process expression
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// 1 arg, read file in sequence
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// 2+ args, [0] = expression, file the rest
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var err error
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stat, _ := os.Stdin.Stat()
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pipingStdIn := (stat.Mode() & os.ModeCharDevice) == 0
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out := cmd.OutOrStdout()
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fileInfo, _ := os.Stdout.Stat()
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if forceColor || (!forceNoColor && (fileInfo.Mode()&os.ModeCharDevice) != 0) {
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colorsEnabled = true
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}
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printer := yqlib.NewPrinter(out, outputToJSON, unwrapScalar, colorsEnabled, indent, !noDocSeparators)
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streamEvaluator := yqlib.NewStreamEvaluator()
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allAtOnceEvaluator := yqlib.NewAllAtOnceEvaluator()
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switch len(args) {
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case 0:
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if pipingStdIn {
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err = streamEvaluator.EvaluateFiles("", []string{"-"}, printer)
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} else {
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cmd.Println(cmd.UsageString())
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return nil
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}
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case 1:
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if nullInput {
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err = allAtOnceEvaluator.EvaluateFiles(args[0], []string{}, printer)
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} else {
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err = streamEvaluator.EvaluateFiles("", []string{args[0]}, printer)
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}
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default:
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err = streamEvaluator.EvaluateFiles(args[0], args[1:], printer)
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}
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cmd.SilenceUsage = true
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return err
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}
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