Checking in vendor folder for ease of using go get.

vendor/github.com/pelletier/go-toml/query/match.go

@@ -0,0 +1,232 @@
+package query
+
+import (
+	"fmt"
+	"github.com/pelletier/go-toml"
+)
+
+// base match
+type matchBase struct {
+	next pathFn
+}
+
+func (f *matchBase) setNext(next pathFn) {
+	f.next = next
+}
+
+// terminating functor - gathers results
+type terminatingFn struct {
+	// empty
+}
+
+func newTerminatingFn() *terminatingFn {
+	return &terminatingFn{}
+}
+
+func (f *terminatingFn) setNext(next pathFn) {
+	// do nothing
+}
+
+func (f *terminatingFn) call(node interface{}, ctx *queryContext) {
+	ctx.result.appendResult(node, ctx.lastPosition)
+}
+
+// match single key
+type matchKeyFn struct {
+	matchBase
+	Name string
+}
+
+func newMatchKeyFn(name string) *matchKeyFn {
+	return &matchKeyFn{Name: name}
+}
+
+func (f *matchKeyFn) call(node interface{}, ctx *queryContext) {
+	if array, ok := node.([]*toml.Tree); ok {
+		for _, tree := range array {
+			item := tree.Get(f.Name)
+			if item != nil {
+				ctx.lastPosition = tree.GetPosition(f.Name)
+				f.next.call(item, ctx)
+			}
+		}
+	} else if tree, ok := node.(*toml.Tree); ok {
+		item := tree.Get(f.Name)
+		if item != nil {
+			ctx.lastPosition = tree.GetPosition(f.Name)
+			f.next.call(item, ctx)
+		}
+	}
+}
+
+// match single index
+type matchIndexFn struct {
+	matchBase
+	Idx int
+}
+
+func newMatchIndexFn(idx int) *matchIndexFn {
+	return &matchIndexFn{Idx: idx}
+}
+
+func (f *matchIndexFn) call(node interface{}, ctx *queryContext) {
+	if arr, ok := node.([]interface{}); ok {
+		if f.Idx < len(arr) && f.Idx >= 0 {
+			if treesArray, ok := node.([]*toml.Tree); ok {
+				if len(treesArray) > 0 {
+					ctx.lastPosition = treesArray[0].Position()
+				}
+			}
+			f.next.call(arr[f.Idx], ctx)
+		}
+	}
+}
+
+// filter by slicing
+type matchSliceFn struct {
+	matchBase
+	Start, End, Step int
+}
+
+func newMatchSliceFn(start, end, step int) *matchSliceFn {
+	return &matchSliceFn{Start: start, End: end, Step: step}
+}
+
+func (f *matchSliceFn) call(node interface{}, ctx *queryContext) {
+	if arr, ok := node.([]interface{}); ok {
+		// adjust indexes for negative values, reverse ordering
+		realStart, realEnd := f.Start, f.End
+		if realStart < 0 {
+			realStart = len(arr) + realStart
+		}
+		if realEnd < 0 {
+			realEnd = len(arr) + realEnd
+		}
+		if realEnd < realStart {
+			realEnd, realStart = realStart, realEnd // swap
+		}
+		// loop and gather
+		for idx := realStart; idx < realEnd; idx += f.Step {
+			if treesArray, ok := node.([]*toml.Tree); ok {
+				if len(treesArray) > 0 {
+					ctx.lastPosition = treesArray[0].Position()
+				}
+			}
+			f.next.call(arr[idx], ctx)
+		}
+	}
+}
+
+// match anything
+type matchAnyFn struct {
+	matchBase
+}
+
+func newMatchAnyFn() *matchAnyFn {
+	return &matchAnyFn{}
+}
+
+func (f *matchAnyFn) call(node interface{}, ctx *queryContext) {
+	if tree, ok := node.(*toml.Tree); ok {
+		for _, k := range tree.Keys() {
+			v := tree.Get(k)
+			ctx.lastPosition = tree.GetPosition(k)
+			f.next.call(v, ctx)
+		}
+	}
+}
+
+// filter through union
+type matchUnionFn struct {
+	Union []pathFn
+}
+
+func (f *matchUnionFn) setNext(next pathFn) {
+	for _, fn := range f.Union {
+		fn.setNext(next)
+	}
+}
+
+func (f *matchUnionFn) call(node interface{}, ctx *queryContext) {
+	for _, fn := range f.Union {
+		fn.call(node, ctx)
+	}
+}
+
+// match every single last node in the tree
+type matchRecursiveFn struct {
+	matchBase
+}
+
+func newMatchRecursiveFn() *matchRecursiveFn {
+	return &matchRecursiveFn{}
+}
+
+func (f *matchRecursiveFn) call(node interface{}, ctx *queryContext) {
+	originalPosition := ctx.lastPosition
+	if tree, ok := node.(*toml.Tree); ok {
+		var visit func(tree *toml.Tree)
+		visit = func(tree *toml.Tree) {
+			for _, k := range tree.Keys() {
+				v := tree.Get(k)
+				ctx.lastPosition = tree.GetPosition(k)
+				f.next.call(v, ctx)
+				switch node := v.(type) {
+				case *toml.Tree:
+					visit(node)
+				case []*toml.Tree:
+					for _, subtree := range node {
+						visit(subtree)
+					}
+				}
+			}
+		}
+		ctx.lastPosition = originalPosition
+		f.next.call(tree, ctx)
+		visit(tree)
+	}
+}
+
+// match based on an externally provided functional filter
+type matchFilterFn struct {
+	matchBase
+	Pos  toml.Position
+	Name string
+}
+
+func newMatchFilterFn(name string, pos toml.Position) *matchFilterFn {
+	return &matchFilterFn{Name: name, Pos: pos}
+}
+
+func (f *matchFilterFn) call(node interface{}, ctx *queryContext) {
+	fn, ok := (*ctx.filters)[f.Name]
+	if !ok {
+		panic(fmt.Sprintf("%s: query context does not have filter '%s'",
+			f.Pos.String(), f.Name))
+	}
+	switch castNode := node.(type) {
+	case *toml.Tree:
+		for _, k := range castNode.Keys() {
+			v := castNode.Get(k)
+			if fn(v) {
+				ctx.lastPosition = castNode.GetPosition(k)
+				f.next.call(v, ctx)
+			}
+		}
+	case []*toml.Tree:
+		for _, v := range castNode {
+			if fn(v) {
+				if len(castNode) > 0 {
+					ctx.lastPosition = castNode[0].Position()
+				}
+				f.next.call(v, ctx)
+			}
+		}
+	case []interface{}:
+		for _, v := range castNode {
+			if fn(v) {
+				f.next.call(v, ctx)
+			}
+		}
+	}
+}