mirror of https://github.com/databricks/cli.git
78 lines
1.9 KiB
Go
78 lines
1.9 KiB
Go
package dyn
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import (
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"fmt"
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"slices"
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)
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// Set assigns a new value at the specified path in the specified value.
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// It is identical to [SetByPath], except that it takes a string path instead of a [Path].
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func Set(v Value, path string, nv Value) (Value, error) {
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p, err := NewPathFromString(path)
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if err != nil {
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return InvalidValue, err
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}
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return SetByPath(v, p, nv)
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}
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// SetByPath assigns the given value at the specified path in the specified value.
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// If successful, it returns the new value with all intermediate values copied and updated.
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// If the path doesn't exist, it returns InvalidValue and an error.
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func SetByPath(v Value, p Path, nv Value) (Value, error) {
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lp := len(p)
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if lp == 0 {
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return nv, nil
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}
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component := p[lp-1]
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p = p[:lp-1]
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return visit(v, EmptyPath, NewPatternFromPath(p), visitOptions{
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fn: func(prefix Path, v Value) (Value, error) {
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path := append(prefix, component)
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switch {
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case component.IsKey():
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// Expect a map to be set if this is a key.
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m, ok := v.AsMap()
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if !ok {
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return InvalidValue, fmt.Errorf("expected a map to index %q, found %s", path, v.Kind())
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}
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// Return an updated map value.
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m = m.Clone()
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m.Set(V(component.key), nv)
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return Value{
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v: m,
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k: KindMap,
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l: v.l,
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}, nil
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case component.IsIndex():
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// Expect a sequence to be set if this is an index.
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s, ok := v.AsSequence()
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if !ok {
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return InvalidValue, fmt.Errorf("expected a sequence to index %q, found %s", path, v.Kind())
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}
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// Lookup current value in the sequence.
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if component.index < 0 || component.index >= len(s) {
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return InvalidValue, indexOutOfBoundsError{prefix}
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}
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// Return an updated sequence value.
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s = slices.Clone(s)
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s[component.index] = nv
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return Value{
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v: s,
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k: KindSequence,
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l: v.l,
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}, nil
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default:
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panic("invalid component")
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}
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},
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})
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}
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