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merge anchors!

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This commit is contained in:
Mike Farah 2020-10-30 12:00:48 +11:00
parent 643f2467ee
commit 461c3e719c
5 changed files with 178 additions and 36 deletions
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20
examples/merge-anchor.yaml
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@ -1,19 +1,19 @@
foo: &foo
a: original
thing: coolasdf
thirsty: yep
a: foo_a
thing: foo_thing
c: foo_c
bar: &bar
b: 2
thing: coconut
c: oldbar
b: bar_b
thing: bar_thing
c: bar_c
foobarList:
b: foobarList_b
<<: [*foo,*bar]
c: newbar
c: foobarList_c
foobar:
c: foobar_c
<<: *foo
thirty: well beyond
thing: ice
c: 3
thing: foobar_thing

4
go.mod
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@ -1,13 +1,13 @@
module github.com/mikefarah/yq/v4
require (
github.com/elliotchance/orderedmap v1.3.0 // indirect
github.com/elliotchance/orderedmap v1.3.0
github.com/fatih/color v1.9.0
github.com/goccy/go-yaml v1.8.1
github.com/jinzhu/copier v0.0.0-20190924061706-b57f9002281a
github.com/kylelemons/godebug v1.1.0 // indirect
github.com/mattn/go-colorable v0.1.7 // indirect
github.com/pkg/errors v0.9.1
github.com/pkg/errors v0.9.1 // indirect
github.com/spf13/cobra v1.0.0
github.com/spf13/pflag v1.0.5 // indirect
github.com/timtadh/data-structures v0.5.3 // indirect

2
pkg/yqlib/treeops/candidate_node.go
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@ -17,7 +17,7 @@ type CandidateNode struct {
}
func (n *CandidateNode) GetKey() string {
return fmt.Sprintf("%v - %v - %v", n.Document, n.Path, n.Node.Value)
return fmt.Sprintf("%v - %v", n.Document, n.Path)
}
func (n *CandidateNode) Copy() *CandidateNode {

84
pkg/yqlib/treeops/operator_traverse_path.go
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@ -5,6 +5,8 @@ import (
"container/list"
"github.com/elliotchance/orderedmap"
"gopkg.in/yaml.v3"
)
@ -65,7 +67,34 @@ func traverse(d *dataTreeNavigator, matchingNode *CandidateNode, operation *Oper
switch value.Kind {
case yaml.MappingNode:
log.Debug("its a map with %v entries", len(value.Content)/2)
return traverseMap(matchingNode, operation)
var newMatches = orderedmap.NewOrderedMap()
err := traverseMap(newMatches, matchingNode, operation)
if err != nil {
return nil, err
}
if newMatches.Len() == 0 {
//no matches, create one automagically
valueNode := &yaml.Node{Tag: "!!null", Kind: yaml.ScalarNode, Value: "null"}
node := matchingNode.Node
node.Content = append(node.Content, &yaml.Node{Kind: yaml.ScalarNode, Value: operation.StringValue}, valueNode)
candidateNode := &CandidateNode{
Node: valueNode,
Path: append(matchingNode.Path, operation.StringValue),
Document: matchingNode.Document,
}
newMatches.Set(candidateNode.GetKey(), candidateNode)
}
arrayMatches := make([]*CandidateNode, newMatches.Len())
i := 0
for el := newMatches.Front(); el != nil; el = el.Next() {
arrayMatches[i] = el.Value.(*CandidateNode)
i++
}
return arrayMatches, nil
case yaml.SequenceNode:
log.Debug("its a sequence of %v things!", len(value.Content))
@ -92,15 +121,13 @@ func keyMatches(key *yaml.Node, pathNode *Operation) bool {
return pathNode.Value == "[]" || Match(key.Value, pathNode.StringValue)
}
func traverseMap(candidate *CandidateNode, pathNode *Operation) ([]*CandidateNode, error) {
func traverseMap(newMatches *orderedmap.OrderedMap, candidate *CandidateNode, operation *Operation) error {
// value.Content is a concatenated array of key, value,
// so keys are in the even indexes, values in odd.
// merge aliases are defined first, but we only want to traverse them
// if we don't find a match directly on this node first.
//TODO ALIASES, auto creation?
var newMatches = make([]*CandidateNode, 0)
node := candidate.Node
var contents = node.Content
@ -109,33 +136,44 @@ func traverseMap(candidate *CandidateNode, pathNode *Operation) ([]*CandidateNod
value := contents[index+1]
log.Debug("checking %v (%v)", key.Value, key.Tag)
if keyMatches(key, pathNode) {
//skip the 'merge' tag, find a direct match first
if key.Tag == "!!merge" {
log.Debug("Merge anchor")
traverseMergeAnchor(newMatches, candidate, value, operation)
} else if keyMatches(key, operation) {
log.Debug("MATCHED")
newMatches = append(newMatches, &CandidateNode{
candidateNode := &CandidateNode{
Node: value,
Path: append(candidate.Path, key.Value),
Document: candidate.Document,
})
}
newMatches.Set(candidateNode.GetKey(), candidateNode)
}
}
if len(newMatches) == 0 {
//no matches, create one automagically
valueNode := &yaml.Node{Tag: "!!null", Kind: yaml.ScalarNode, Value: "null"}
node.Content = append(node.Content, &yaml.Node{Kind: yaml.ScalarNode, Value: pathNode.StringValue}, valueNode)
newMatches = append(newMatches, &CandidateNode{
Node: valueNode,
Path: append(candidate.Path, pathNode.StringValue),
Document: candidate.Document,
})
}
return newMatches, nil
return nil
}
func traverseArray(candidate *CandidateNode, pathNode *Operation) ([]*CandidateNode, error) {
log.Debug("pathNode Value %v", pathNode.Value)
if pathNode.Value == "[]" {
func traverseMergeAnchor(newMatches *orderedmap.OrderedMap, originalCandidate *CandidateNode, value *yaml.Node, operation *Operation) {
switch value.Kind {
case yaml.AliasNode:
candidateNode := &CandidateNode{
Node: value.Alias,
Path: originalCandidate.Path,
Document: originalCandidate.Document,
}
traverseMap(newMatches, candidateNode, operation)
case yaml.SequenceNode:
for _, childValue := range value.Content {
traverseMergeAnchor(newMatches, originalCandidate, childValue, operation)
}
}
return
}
func traverseArray(candidate *CandidateNode, operation *Operation) ([]*CandidateNode, error) {
log.Debug("operation Value %v", operation.Value)
if operation.Value == "[]" {
var contents = candidate.Node.Content
var newMatches = make([]*CandidateNode, len(contents))
@ -151,7 +189,7 @@ func traverseArray(candidate *CandidateNode, pathNode *Operation) ([]*CandidateN
}
index := pathNode.Value.(int64)
index := operation.Value.(int64)
indexToUse := index
contentLength := int64(len(candidate.Node.Content))
for contentLength <= index {

104
pkg/yqlib/treeops/operator_traverse_path_test.go
View File

@ -4,6 +4,28 @@ import (
"testing"
)
var mergeDocSample = `
foo: &foo
a: foo_a
thing: foo_thing
c: foo_c
bar: &bar
b: bar_b
thing: bar_thing
c: bar_c
foobarList:
b: foobarList_b
<<: [*foo,*bar]
c: foobarList_c
foobar:
c: foobar_c
<<: *foo
thing: foobar_thing
`
var traversePathOperatorScenarios = []expressionScenario{
{
document: `{a: {b: apple}}`,
@ -104,6 +126,88 @@ var traversePathOperatorScenarios = []expressionScenario{
"D0, P[b c], (!!str)::frog\n",
},
},
{
document: mergeDocSample,
expression: `.foobar`,
expected: []string{
"D0, P[foobar], (!!map)::c: foobar_c\n!!merge <<: *foo\nthing: foobar_thing\n",
},
},
{
document: mergeDocSample,
expression: `.foobar.a`,
expected: []string{
"D0, P[foobar a], (!!str)::foo_a\n",
},
},
{
document: mergeDocSample,
expression: `.foobar.c`,
expected: []string{
"D0, P[foobar c], (!!str)::foo_c\n",
},
},
{
document: mergeDocSample,
expression: `.foobar.thing`,
expected: []string{
"D0, P[foobar thing], (!!str)::foobar_thing\n",
},
},
{
document: mergeDocSample,
expression: `.foobar.[]`,
expected: []string{
"D0, P[foobar c], (!!str)::foo_c\n",
"D0, P[foobar a], (!!str)::foo_a\n",
"D0, P[foobar thing], (!!str)::foobar_thing\n",
},
},
{
document: mergeDocSample,
expression: `.foobarList`,
expected: []string{
"D0, P[foobarList], (!!map)::b: foobarList_b\n!!merge <<: [*foo, *bar]\nc: foobarList_c\n",
},
},
{
document: mergeDocSample,
expression: `.foobarList.a`,
expected: []string{
"D0, P[foobarList a], (!!str)::foo_a\n",
},
},
{
document: mergeDocSample,
expression: `.foobarList.thing`,
expected: []string{
"D0, P[foobarList thing], (!!str)::bar_thing\n",
},
},
{
document: mergeDocSample,
expression: `.foobarList.c`,
expected: []string{
"D0, P[foobarList c], (!!str)::foobarList_c\n",
},
},
{
document: mergeDocSample,
expression: `.foobarList.b`,
expected: []string{
"D0, P[foobarList b], (!!str)::bar_b\n",
},
},
{
document: mergeDocSample,
expression: `.foobarList.[]`,
expected: []string{
"D0, P[foobarList b], (!!str)::bar_b\n",
"D0, P[foobarList a], (!!str)::foo_a\n",
"D0, P[foobarList thing], (!!str)::bar_thing\n",
"D0, P[foobarList c], (!!str)::foobarList_c\n",
},
},
}
func TestTraversePathOperatorScenarios(t *testing.T) {