inputs decryption using SOPS

- Add support for --input-json and --input-yaml (plaintext)
- Input files can optionally be encrypted using sops, with transparent
  decryption by dagger

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

dagger/compiler/compiler.go

@@ -6,6 +6,8 @@ import (
 
 	"cuelang.org/go/cue"
 	cueerrors "cuelang.org/go/cue/errors"
+	cuejson "cuelang.org/go/encoding/json"
+	cueyaml "cuelang.org/go/encoding/yaml"
 )
 
 var (
@@ -34,6 +36,14 @@ func Err(err error) error {
 	return DefaultCompiler.Err(err)
 }
 
+func DecodeJSON(path string, data []byte) (*Value, error) {
+	return DefaultCompiler.DecodeJSON(path, data)
+}
+
+func DecodeYAML(path string, data []byte) (*Value, error) {
+	return DefaultCompiler.DecodeYAML(path, data)
+}
+
 // Polyfill for a cue runtime
 // (we call it compiler to avoid confusion with dagger runtime)
 // Use this instead of cue.Runtime
@@ -83,6 +93,22 @@ func (c *Compiler) Compile(name string, src interface{}) (*Value, error) {
 	return c.Wrap(inst.Value(), inst), nil
 }
 
+func (c *Compiler) DecodeJSON(path string, data []byte) (*Value, error) {
+	inst, err := cuejson.Decode(c.Cue(), path, data)
+	if err != nil {
+		return nil, Err(err)
+	}
+	return c.Wrap(inst.Value(), inst), nil
+}
+
+func (c *Compiler) DecodeYAML(path string, data []byte) (*Value, error) {
+	inst, err := cueyaml.Decode(c.Cue(), path, data)
+	if err != nil {
+		return nil, Err(err)
+	}
+	return c.Wrap(inst.Value(), inst), nil
+}
+
 func (c *Compiler) Wrap(v cue.Value, inst *cue.Instance) *Value {
 	return wrapValue(v, inst, c)
 }