databricks-cli/bundle/internal/schema/parser.go

132 lines
3.0 KiB
Go

package main
import (
"encoding/json"
"fmt"
"os"
"path"
"reflect"
"strings"
"github.com/databricks/cli/libs/jsonschema"
)
type Components struct {
Schemas map[string]jsonschema.Schema `json:"schemas,omitempty"`
}
type Specification struct {
Components Components `json:"components"`
}
type openapiParser struct {
ref map[string]jsonschema.Schema
}
func newParser(path string) (*openapiParser, error) {
b, err := os.ReadFile(path)
if err != nil {
return nil, err
}
spec := Specification{}
err = json.Unmarshal(b, &spec)
if err != nil {
return nil, err
}
p := &openapiParser{}
p.ref = spec.Components.Schemas
return p, nil
}
// This function finds any JSON schemas that were defined in the OpenAPI spec
// that correspond to the given Go SDK type. It looks both at the type itself
// and any embedded types within it.
func (p *openapiParser) findRef(typ reflect.Type) (jsonschema.Schema, bool) {
typs := []reflect.Type{typ}
// If the type is a struct, the corresponding Go SDK struct might be embedded
// in it. We need to check for those as well.
if typ.Kind() == reflect.Struct {
for i := 0; i < typ.NumField(); i++ {
if !typ.Field(i).Anonymous {
continue
}
// Deference current type if it's a pointer.
ctyp := typ.Field(i).Type
for ctyp.Kind() == reflect.Ptr {
ctyp = ctyp.Elem()
}
typs = append(typs, ctyp)
}
}
for _, ctyp := range typs {
// Skip if it's not a Go SDK type.
if !strings.HasPrefix(ctyp.PkgPath(), "github.com/databricks/databricks-sdk-go") {
continue
}
pkgName := path.Base(ctyp.PkgPath())
k := fmt.Sprintf("%s.%s", pkgName, ctyp.Name())
// Skip if the type is not in the openapi spec.
_, ok := p.ref[k]
if !ok {
continue
}
// Return the first Go SDK type found in the openapi spec.
return p.ref[k], true
}
return jsonschema.Schema{}, false
}
// Use the OpenAPI spec to load descriptions for the given type.
func (p *openapiParser) addDescriptions(typ reflect.Type, s jsonschema.Schema) jsonschema.Schema {
ref, ok := p.findRef(typ)
if !ok {
return s
}
s.Description = ref.Description
// Iterate over properties to load descriptions. This is not needed for any
// OpenAPI spec generated from protobufs, which are guaranteed to be one level
// deep.
// Needed for any hand-written OpenAPI specs.
for k, v := range s.Properties {
if refProp, ok := ref.Properties[k]; ok {
v.Description = refProp.Description
}
}
return s
}
// Use the OpenAPI spec add enum values for the given type.
func (p *openapiParser) addEnums(typ reflect.Type, s jsonschema.Schema) jsonschema.Schema {
ref, ok := p.findRef(typ)
if !ok {
return s
}
s.Enum = append(s.Enum, ref.Enum...)
// Iterate over properties to load enums. This is not needed for any
// OpenAPI spec generated from protobufs, which are guaranteed to be one level
// deep.
// Needed for any hand-written OpenAPI specs.
for k, v := range s.Properties {
if refProp, ok := ref.Properties[k]; ok {
v.Enum = append(v.Enum, refProp.Enum...)
}
}
return s
}