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literal.go
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literal.go
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package call
import (
"fmt"
"strconv"
"github.com/opencontainers/go-digest"
"github.com/vektah/gqlparser/v2/ast"
"github.com/dagger/dagger/dagql/call/callpbv1"
)
type Literate interface {
ToLiteral() Literal
}
type Literal interface {
Inputs() ([]digest.Digest, error)
Modules() []*Module
Tainted() bool
Display() string
ToInput() any
ToAST() *ast.Value
pb() *callpbv1.Literal
gatherCalls(map[string]*callpbv1.Call)
}
type LiteralID struct {
id *ID
}
func NewLiteralID(id *ID) *LiteralID {
return &LiteralID{id: id}
}
func (lit *LiteralID) Value() *ID {
return lit.id
}
func (lit *LiteralID) Inputs() ([]digest.Digest, error) {
return []digest.Digest{lit.id.Digest()}, nil
}
func (lit *LiteralID) Modules() []*Module {
return lit.id.Modules()
}
func (lit *LiteralID) Tainted() bool {
return lit.id.IsTainted()
}
func (lit *LiteralID) Display() string {
return fmt.Sprintf("{%s}", lit.id.Display())
}
func (lit *LiteralID) ToInput() any {
return lit.id
}
func (lit *LiteralID) ToAST() *ast.Value {
enc, err := lit.id.Encode()
if err != nil {
panic(err)
}
return &ast.Value{
Raw: enc,
Kind: ast.StringValue,
}
}
func (lit *LiteralID) pb() *callpbv1.Literal {
return &callpbv1.Literal{Value: &callpbv1.Literal_CallDigest{CallDigest: lit.id.pb.Digest}}
}
func (lit *LiteralID) gatherCalls(callsByDigest map[string]*callpbv1.Call) {
lit.id.gatherCalls(callsByDigest)
}
type LiteralList struct {
values []Literal
}
func NewLiteralList(values ...Literal) *LiteralList {
return &LiteralList{values: values}
}
func (lit *LiteralList) Range(fn func(int, Literal) error) error {
for i, v := range lit.values {
if v == nil {
if err := fn(i, nil); err != nil {
return err
}
continue
}
if err := fn(i, v); err != nil {
return err
}
}
return nil
}
func (lit *LiteralList) Inputs() ([]digest.Digest, error) {
var inputs []digest.Digest
for _, v := range lit.values {
ins, err := v.Inputs()
if err != nil {
return nil, err
}
inputs = append(inputs, ins...)
}
return inputs, nil
}
func (lit *LiteralList) Modules() []*Module {
mods := []*Module{}
for _, val := range lit.values {
mods = append(mods, val.Modules()...)
}
return mods
}
func (lit *LiteralList) Tainted() bool {
for _, val := range lit.values {
if val.Tainted() {
return true
}
}
return false
}
func (lit *LiteralList) Display() string {
list := "["
for i, val := range lit.values {
if i > 0 {
list += ","
}
list += val.Display()
}
list += "]"
return list
}
func (lit *LiteralList) ToInput() any {
list := make([]any, len(lit.values))
for i, val := range lit.values {
list[i] = val.ToInput()
}
return list
}
func (lit *LiteralList) ToAST() *ast.Value {
list := &ast.Value{
Kind: ast.ListValue,
}
for _, val := range lit.values {
list.Children = append(list.Children, &ast.ChildValue{
Value: val.ToAST(),
})
}
return list
}
func (lit *LiteralList) pb() *callpbv1.Literal {
list := make([]*callpbv1.Literal, len(lit.values))
for i, val := range lit.values {
list[i] = val.pb()
}
return &callpbv1.Literal{Value: &callpbv1.Literal_List{List: &callpbv1.List{Values: list}}}
}
func (lit *LiteralList) gatherCalls(callsByDigest map[string]*callpbv1.Call) {
for _, val := range lit.values {
val.gatherCalls(callsByDigest)
}
}
type LiteralObject struct {
values []*Argument
}
func NewLiteralObject(values ...*Argument) *LiteralObject {
return &LiteralObject{values: values}
}
func (lit *LiteralObject) Range(fn func(int, string, Literal) error) error {
for i, v := range lit.values {
if v == nil {
if err := fn(i, "", nil); err != nil {
return err
}
continue
}
if v.value == nil {
if err := fn(i, v.pb.Name, nil); err != nil {
return err
}
continue
}
if err := fn(i, v.pb.Name, v.value); err != nil {
return err
}
}
return nil
}
func (lit *LiteralObject) Inputs() ([]digest.Digest, error) {
var inputs []digest.Digest
for _, v := range lit.values {
ins, err := v.value.Inputs()
if err != nil {
return nil, err
}
inputs = append(inputs, ins...)
}
return inputs, nil
}
func (lit *LiteralObject) Modules() []*Module {
mods := []*Module{}
for _, arg := range lit.values {
mods = append(mods, arg.value.Modules()...)
}
return mods
}
func (lit *LiteralObject) Tainted() bool {
for _, arg := range lit.values {
if arg.Tainted() {
return true
}
}
return false
}
func (lit *LiteralObject) Display() string {
obj := "{"
for i, field := range lit.values {
if i > 0 {
obj += ","
}
obj += field.pb.Name + ": " + field.value.Display()
}
obj += "}"
return obj
}
func (lit *LiteralObject) ToInput() any {
obj := make(map[string]any, len(lit.values))
for _, field := range lit.values {
obj[field.pb.Name] = field.value.ToInput()
}
return obj
}
func (lit *LiteralObject) ToAST() *ast.Value {
obj := &ast.Value{
Kind: ast.ObjectValue,
}
for _, field := range lit.values {
obj.Children = append(obj.Children, &ast.ChildValue{
Name: field.pb.Name,
Value: field.value.ToAST(),
})
}
return obj
}
func (lit *LiteralObject) pb() *callpbv1.Literal {
args := make([]*callpbv1.Argument, len(lit.values))
for i, val := range lit.values {
args[i] = val.pb
}
return &callpbv1.Literal{Value: &callpbv1.Literal_Object{Object: &callpbv1.Object{Values: args}}}
}
func (lit *LiteralObject) gatherCalls(callsByDigest map[string]*callpbv1.Call) {
for _, val := range lit.values {
val.gatherCalls(callsByDigest)
}
}
type LiteralBool = LiteralPrimitiveType[bool, *callpbv1.Literal_Bool]
func NewLiteralBool(val bool) *LiteralBool {
return &LiteralBool{&callpbv1.Literal_Bool{Bool: val}}
}
type LiteralEnum = LiteralPrimitiveType[string, *callpbv1.Literal_Enum]
func NewLiteralEnum(val string) *LiteralEnum {
return &LiteralEnum{&callpbv1.Literal_Enum{Enum: val}}
}
type LiteralInt = LiteralPrimitiveType[int64, *callpbv1.Literal_Int]
func NewLiteralInt(val int64) *LiteralInt {
return &LiteralInt{&callpbv1.Literal_Int{Int: val}}
}
type LiteralFloat = LiteralPrimitiveType[float64, *callpbv1.Literal_Float]
func NewLiteralFloat(val float64) *LiteralFloat {
return &LiteralFloat{&callpbv1.Literal_Float{Float: val}}
}
type LiteralString = LiteralPrimitiveType[string, *callpbv1.Literal_String_]
func NewLiteralString(val string) *LiteralString {
return &LiteralString{&callpbv1.Literal_String_{String_: val}}
}
type LiteralNull = LiteralPrimitiveType[any, *callpbv1.Literal_Null]
func NewLiteralNull() *LiteralNull {
return &LiteralNull{&callpbv1.Literal_Null{Null: true}}
}
type LiteralPrimitiveType[T comparable, V callpbv1.LiteralValue[T]] struct {
pbVal V
}
func (lit *LiteralPrimitiveType[T, V]) Value() T {
return lit.pbVal.Value()
}
func (lit *LiteralPrimitiveType[T, V]) Inputs() ([]digest.Digest, error) {
return nil, nil
}
func (lit *LiteralPrimitiveType[T, V]) Modules() []*Module {
return nil
}
func (lit *LiteralPrimitiveType[T, V]) Tainted() bool {
return false
}
func (lit *LiteralPrimitiveType[T, V]) Display() string {
// kludge to special case truncation of strings
if lit.pbVal.ASTKind() == ast.StringValue {
var val any = lit.pbVal.Value()
return truncate(strconv.Quote(val.(string)), 100)
}
return fmt.Sprintf("%v", lit.pbVal.Value())
}
func (lit *LiteralPrimitiveType[T, V]) ToInput() any {
return lit.pbVal.Value()
}
func (lit *LiteralPrimitiveType[T, V]) ToAST() *ast.Value {
kind := lit.pbVal.ASTKind()
var raw string
if kind == ast.NullValue {
// this teeny kludge allows us to use LiteralPrimitiveType with Literal_Null
// otherwise the raw Value would show up as "<nil>"
raw = "null"
} else {
raw = fmt.Sprintf("%v", lit.pbVal.Value())
}
return &ast.Value{
Raw: raw,
Kind: kind,
}
}
func (lit *LiteralPrimitiveType[T, V]) pb() *callpbv1.Literal {
return &callpbv1.Literal{Value: lit.pbVal}
}
func (lit *LiteralPrimitiveType[T, V]) gatherCalls(_ map[string]*callpbv1.Call) {}
func decodeLiteral(
pb *callpbv1.Literal,
callsByDigest map[string]*callpbv1.Call,
memo map[string]*ID,
) (Literal, error) {
if pb == nil {
return nil, nil
}
switch v := pb.Value.(type) {
case *callpbv1.Literal_CallDigest:
if v.CallDigest == "" {
return nil, nil
}
call := new(ID)
if err := call.decode(v.CallDigest, callsByDigest, memo); err != nil {
return nil, fmt.Errorf("failed to decode literal Call: %w", err)
}
return NewLiteralID(call), nil
case *callpbv1.Literal_Null:
return NewLiteralNull(), nil
case *callpbv1.Literal_Bool:
return NewLiteralBool(v.Bool), nil
case *callpbv1.Literal_Enum:
return NewLiteralEnum(v.Enum), nil
case *callpbv1.Literal_Int:
return NewLiteralInt(v.Int), nil
case *callpbv1.Literal_Float:
return NewLiteralFloat(v.Float), nil
case *callpbv1.Literal_String_:
return NewLiteralString(v.String_), nil
case *callpbv1.Literal_List:
list := make([]Literal, 0, len(v.List.Values))
for _, val := range v.List.Values {
if val == nil || val.Value == nil {
continue
}
elemLit, err := decodeLiteral(val, callsByDigest, memo)
if err != nil {
return nil, fmt.Errorf("failed to decode list literal: %w", err)
}
list = append(list, elemLit)
}
return NewLiteralList(list...), nil
case *callpbv1.Literal_Object:
args := make([]*Argument, 0, len(v.Object.Values))
for _, arg := range v.Object.Values {
if arg == nil {
continue
}
fieldLit, err := decodeLiteral(arg.Value, callsByDigest, memo)
if err != nil {
return nil, fmt.Errorf("failed to decode object literal: %w", err)
}
args = append(args, &Argument{
pb: arg,
value: fieldLit,
})
}
return NewLiteralObject(args...), nil
default:
return nil, fmt.Errorf("unknown literal value type %T", v)
}
}
func truncate(s string, length int) string {
if len(s) <= length {
return s
}
if length < 5 {
return s[:length]
}
dig := digest.FromString(s)
prefixLength := (length - 3) / 2
suffixLength := length - 3 - prefixLength
abbrev := s[:prefixLength] + "..." + s[len(s)-suffixLength:]
return fmt.Sprintf("%s:%d:%s", dig, len(s), abbrev)
}