yq/pkg/yqlib/operator_comments.go

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package yqlib
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import (
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"bufio"
"bytes"
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"container/list"
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"regexp"
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yaml "gopkg.in/yaml.v3"
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)
type commentOpPreferences struct {
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LineComment bool
HeadComment bool
FootComment bool
}
func assignCommentsOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
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log.Debugf("AssignComments operator!")
lhs, err := d.GetMatchingNodes(context, expressionNode.Lhs)
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if err != nil {
return Context{}, err
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}
preferences := expressionNode.Operation.Preferences.(commentOpPreferences)
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comment := ""
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if !expressionNode.Operation.UpdateAssign {
rhs, err := d.GetMatchingNodes(context.ReadOnlyClone(), expressionNode.Rhs)
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if err != nil {
return Context{}, err
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}
if rhs.MatchingNodes.Front() != nil {
comment = rhs.MatchingNodes.Front().Value.(*CandidateNode).Node.Value
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}
}
for el := lhs.MatchingNodes.Front(); el != nil; el = el.Next() {
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candidate := el.Value.(*CandidateNode)
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if expressionNode.Operation.UpdateAssign {
rhs, err := d.GetMatchingNodes(context.SingleReadonlyChildContext(candidate), expressionNode.Rhs)
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if err != nil {
return Context{}, err
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}
if rhs.MatchingNodes.Front() != nil {
comment = rhs.MatchingNodes.Front().Value.(*CandidateNode).Node.Value
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}
}
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log.Debugf("Setting comment of : %v", candidate.GetKey())
if preferences.LineComment {
candidate.Node.LineComment = comment
}
if preferences.HeadComment {
candidate.Node.HeadComment = comment
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candidate.LeadingContent = "" // clobber the leading content, if there was any.
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}
if preferences.FootComment {
candidate.Node.FootComment = comment
}
}
return context, nil
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}
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func getCommentsOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
preferences := expressionNode.Operation.Preferences.(commentOpPreferences)
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var startCommentCharaterRegExp = regexp.MustCompile(`^# `)
var subsequentCommentCharaterRegExp = regexp.MustCompile(`\n# `)
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log.Debugf("GetComments operator!")
var results = list.New()
for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
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candidate := el.Value.(*CandidateNode)
comment := ""
if preferences.LineComment {
comment = candidate.Node.LineComment
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} else if preferences.HeadComment && candidate.LeadingContent != "" {
var chompRegexp = regexp.MustCompile(`\n$`)
var output bytes.Buffer
var writer = bufio.NewWriter(&output)
if err := processLeadingContent(candidate, writer, false, YamlOutputFormat); err != nil {
return Context{}, err
}
if err := writer.Flush(); err != nil {
return Context{}, err
}
comment = output.String()
comment = chompRegexp.ReplaceAllString(comment, "")
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} else if preferences.HeadComment {
comment = candidate.Node.HeadComment
} else if preferences.FootComment {
comment = candidate.Node.FootComment
}
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comment = startCommentCharaterRegExp.ReplaceAllString(comment, "")
comment = subsequentCommentCharaterRegExp.ReplaceAllString(comment, "\n")
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node := &yaml.Node{Kind: yaml.ScalarNode, Value: comment, Tag: "!!str"}
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result := candidate.CreateReplacement(node)
results.PushBack(result)
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}
return context.ChildContext(results), nil
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}