mirror of https://github.com/mikefarah/yq.git
147 lines
4.0 KiB
Go
147 lines
4.0 KiB
Go
package cmd
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
|
|
"github.com/mikefarah/yq/v4/pkg/yqlib"
|
|
"github.com/spf13/cobra"
|
|
)
|
|
|
|
func createEvaluateSequenceCommand() *cobra.Command {
|
|
var cmdEvalSequence = &cobra.Command{
|
|
Use: "eval [expression] [yaml_file1]...",
|
|
Aliases: []string{"e"},
|
|
Short: "Apply the expression to each document in each yaml file in sequence",
|
|
Example: `
|
|
# Reads field under the given path for each file
|
|
yq e '.a.b' f1.yml f2.yml
|
|
|
|
# Prints out the file
|
|
yq e sample.yaml
|
|
|
|
# Read from STDIN
|
|
## use '-' as a filename to read from STDIN
|
|
cat file2.yml | yq e '.a.b' file1.yml - file3.yml
|
|
|
|
# Creates a new yaml document
|
|
## Note that editing an empty file does not work.
|
|
yq e -n '.a.b.c = "cat"'
|
|
|
|
# Update a file inplace
|
|
yq e '.a.b = "cool"' -i file.yaml
|
|
`,
|
|
Long: `yq is a portable command-line YAML processor (https://github.com/mikefarah/yq/)
|
|
See https://mikefarah.gitbook.io/yq/ for detailed documentation and examples.
|
|
|
|
## Evaluate Sequence ##
|
|
This command iterates over each yaml document from each given file, applies the
|
|
expression and prints the result in sequence.`,
|
|
RunE: evaluateSequence,
|
|
}
|
|
return cmdEvalSequence
|
|
}
|
|
|
|
func processExpression(expression string) string {
|
|
if prettyPrint && expression == "" {
|
|
return `... style=""`
|
|
} else if prettyPrint {
|
|
return fmt.Sprintf("%v | ... style= \"\"", expression)
|
|
}
|
|
return expression
|
|
}
|
|
|
|
func evaluateSequence(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
|
|
}
|
|
|
|
firstFileIndex := -1
|
|
if !nullInput && len(args) == 1 {
|
|
firstFileIndex = 0
|
|
} else if len(args) > 1 {
|
|
firstFileIndex = 1
|
|
}
|
|
|
|
if writeInplace && (firstFileIndex == -1) {
|
|
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[firstFileIndex])
|
|
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)
|
|
|
|
streamEvaluator := yqlib.NewStreamEvaluator()
|
|
|
|
if nullInput && len(args) > 1 {
|
|
return errors.New("Cannot pass files in when using null-input flag")
|
|
}
|
|
|
|
if frontMatter != "" {
|
|
frontMatterHandler := yqlib.NewFrontMatterHandler(args[firstFileIndex])
|
|
err = frontMatterHandler.Split()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
args[firstFileIndex] = frontMatterHandler.GetYamlFrontMatterFilename()
|
|
|
|
if frontMatter == "process" {
|
|
reader := frontMatterHandler.GetContentReader()
|
|
printer.SetAppendix(reader)
|
|
defer yqlib.SafelyCloseReader(reader)
|
|
}
|
|
defer frontMatterHandler.CleanUp()
|
|
}
|
|
|
|
switch len(args) {
|
|
case 0:
|
|
if pipingStdIn {
|
|
err = streamEvaluator.EvaluateFiles(processExpression(""), []string{"-"}, printer, leadingContentPreProcessing)
|
|
} else {
|
|
cmd.Println(cmd.UsageString())
|
|
return nil
|
|
}
|
|
case 1:
|
|
if nullInput {
|
|
err = streamEvaluator.EvaluateNew(processExpression(args[0]), printer, "")
|
|
} else {
|
|
err = streamEvaluator.EvaluateFiles(processExpression(""), []string{args[0]}, printer, leadingContentPreProcessing)
|
|
}
|
|
default:
|
|
err = streamEvaluator.EvaluateFiles(processExpression(args[0]), args[1:], printer, leadingContentPreProcessing)
|
|
}
|
|
completedSuccessfully = err == nil
|
|
|
|
if err == nil && exitStatus && !printer.PrintedAnything() {
|
|
return errors.New("no matches found")
|
|
}
|
|
|
|
return err
|
|
}
|