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protobuf.go
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protobuf.go
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package importer
import (
"fmt"
"strings"
"github.com/anz-bank/sysl/internal/bundles"
"github.com/anz-bank/sysl/pkg/arrai"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
type ProtobufImporter struct {
pkg string
importPaths string
shallow bool
logger *logrus.Logger
}
// MakeProtobufImporter is a factory method for creating new Protobuf importer.
func MakeProtobufImporter(logger *logrus.Logger) *ProtobufImporter {
return &ProtobufImporter{logger: logger}
}
func (p *ProtobufImporter) LoadFile(path string) (string, error) {
b := bundles.ProtoImporter
args, err := buildImporterArgs(&protobufImporterArgs{
specPath: path,
importPaths: p.importPaths,
shallow: p.shallow,
})
if err != nil {
return "", err
}
val, err := arrai.EvaluateBundle(b, args...)
if err != nil {
return "", errors.Wrap(arrai.ExecutionError{
Context: fmt.Sprintf("File: %s, ImportPaths: %s", path, p.importPaths),
Err: err,
ShortMsg: err.Error(),
}, "Executing arrai transform failed")
}
return strings.TrimSpace(val.String()) + "\n", nil
}
// Load returns a Sysl spec equivalent to protoSpec.
func (p *ProtobufImporter) Load(protoSpec string) (string, error) {
b := bundles.ProtoImporter
args, err := buildImporterArgs(&protobufImporterArgs{
specContent: protoSpec,
importPaths: p.importPaths,
shallow: p.shallow,
})
if err != nil {
return "", err
}
val, err := arrai.EvaluateBundle(b, args...)
if err != nil {
return "", errors.Wrap(arrai.ExecutionError{
Context: fmt.Sprintf("Content: %s, ImportPaths: %s", protoSpec, p.importPaths),
Err: err,
ShortMsg: err.Error(),
}, "Executing arrai transform failed")
}
return strings.TrimSpace(val.String()) + "\n", nil
}
// Configure allows the imported Sysl application name, package and import directories to be specified.
func (p *ProtobufImporter) Configure(arg *ImporterArg) (Importer, error) {
p.pkg = arg.PackageName
p.importPaths = arg.Imports
p.shallow = arg.Shallow
return p, nil
}
type protobufImporterArgs struct {
importPaths, specPath, specContent string
shallow bool
}
func buildImporterArgs(a *protobufImporterArgs) ([]string, error) {
args := []string{}
if a.specContent != "" && a.specPath != "" {
return nil, errors.New("provide only path to spec or the spec content")
}
if a.specContent == "" && a.specPath == "" {
return nil, errors.New("spec not provided")
}
if a.specContent != "" {
args = append(args, "--spec", a.specContent)
}
if a.specPath != "" {
args = append(args, "--input", a.specPath)
}
if a.importPaths != "" {
args = append(args, "--import-paths", a.importPaths)
}
if a.shallow {
args = append(args, "--shallow")
}
return args, nil
}