mirror of https://github.com/databricks/cli.git
97 lines
2.7 KiB
Go
97 lines
2.7 KiB
Go
package dyn
|
|
|
|
import (
|
|
"fmt"
|
|
"maps"
|
|
"slices"
|
|
)
|
|
|
|
// Pattern represents a matcher for paths in a [Value] configuration tree.
|
|
// It is used by [MapByPattern] to apply a function to the values whose paths match the pattern.
|
|
// Every [Path] is a valid [Pattern] that matches a single unique path.
|
|
// The reverse is not true; not every [Pattern] is a valid [Path], as patterns may contain wildcards.
|
|
type Pattern []patternComponent
|
|
|
|
// A pattern component can visit a [Value] and recursively call into [visit] for matching elements.
|
|
// Fixed components can match a single key or index, while wildcards can match any key or index.
|
|
type patternComponent interface {
|
|
visit(v Value, prefix Path, suffix Pattern, opts visitOptions) (Value, error)
|
|
}
|
|
|
|
// NewPattern returns a new pattern from the given components.
|
|
// The individual components may be created with [Key], [Index], or [Any].
|
|
func NewPattern(cs ...patternComponent) Pattern {
|
|
return cs
|
|
}
|
|
|
|
// NewPatternFromPath returns a new pattern from the given path.
|
|
func NewPatternFromPath(p Path) Pattern {
|
|
cs := make(Pattern, len(p))
|
|
for i, c := range p {
|
|
cs[i] = c
|
|
}
|
|
return cs
|
|
}
|
|
|
|
type anyKeyComponent struct{}
|
|
|
|
// AnyKey returns a pattern component that matches any key.
|
|
func AnyKey() patternComponent {
|
|
return anyKeyComponent{}
|
|
}
|
|
|
|
// This function implements the patternComponent interface.
|
|
func (c anyKeyComponent) visit(v Value, prefix Path, suffix Pattern, opts visitOptions) (Value, error) {
|
|
m, ok := v.AsMap()
|
|
if !ok {
|
|
return InvalidValue, fmt.Errorf("expected a map at %q, found %s", prefix, v.Kind())
|
|
}
|
|
|
|
m = maps.Clone(m)
|
|
for key, value := range m {
|
|
var err error
|
|
nv, err := visit(value, prefix.Append(Key(key)), suffix, opts)
|
|
if err != nil {
|
|
// Leave the value intact if the suffix pattern didn't match any value.
|
|
if IsNoSuchKeyError(err) || IsIndexOutOfBoundsError(err) {
|
|
continue
|
|
}
|
|
return InvalidValue, err
|
|
}
|
|
m[key] = nv
|
|
}
|
|
|
|
return NewValue(m, v.Location()), nil
|
|
}
|
|
|
|
type anyIndexComponent struct{}
|
|
|
|
// AnyIndex returns a pattern component that matches any index.
|
|
func AnyIndex() patternComponent {
|
|
return anyIndexComponent{}
|
|
}
|
|
|
|
// This function implements the patternComponent interface.
|
|
func (c anyIndexComponent) visit(v Value, prefix Path, suffix Pattern, opts visitOptions) (Value, error) {
|
|
s, ok := v.AsSequence()
|
|
if !ok {
|
|
return InvalidValue, fmt.Errorf("expected a sequence at %q, found %s", prefix, v.Kind())
|
|
}
|
|
|
|
s = slices.Clone(s)
|
|
for i, value := range s {
|
|
var err error
|
|
nv, err := visit(value, prefix.Append(Index(i)), suffix, opts)
|
|
if err != nil {
|
|
// Leave the value intact if the suffix pattern didn't match any value.
|
|
if IsNoSuchKeyError(err) || IsIndexOutOfBoundsError(err) {
|
|
continue
|
|
}
|
|
return InvalidValue, err
|
|
}
|
|
s[i] = nv
|
|
}
|
|
|
|
return NewValue(s, v.Location()), nil
|
|
}
|