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transform.go
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transform.go
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package exporter
import (
"bytes"
"io"
"os"
"path"
"strings"
"github.com/anz-bank/sysl/internal/bundles"
"github.com/anz-bank/sysl/pkg/arrai/transform"
"github.com/anz-bank/sysl/pkg/sysl"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/afero"
)
func MakeTransformExporter(
fs afero.Fs,
logger *logrus.Logger,
rootPath, outPath,
transformName string,
) *TransformExporter {
return &TransformExporter{
fs: fs,
log: logger,
rootPath: rootPath,
outPath: outPath,
transformName: transformName,
}
}
// TransformExporter enables exporting into various formats by running embedded arr.ai transform scripts that convert
// Sysl.
type TransformExporter struct {
fs afero.Fs
log *logrus.Logger
rootPath string
outPath string
transformName string
}
// ExportFile reads in a Sysl file from path, converts it to the output format, and writes it to
// the file system.
func (e *TransformExporter) ExportFile(modules []*sysl.Module, modulePaths []string) error {
b := &bytes.Buffer{}
if err := e.ExportToWriter(b, modules, modulePaths); err != nil {
return err
}
return afero.WriteFile(e.fs, e.outPath, b.Bytes(), os.ModePerm)
}
func (e *TransformExporter) ExportToWriter(w io.Writer, modules []*sysl.Module, modulePaths []string) error {
input, err := transform.BuildTransformInput(modules, modulePaths)
if err != nil {
return err
}
scriptPath := path.Join("exporters", strings.ToLower(e.transformName), "transform.arraiz")
result, err := transform.EvalWithParam(bundles.MustRead(scriptPath), scriptPath, input)
if err != nil {
return err
}
_, err = w.Write([]byte(result.String()))
return err
}
func (e *TransformExporter) ExportApp(*sysl.Application) error {
return errors.Errorf("ExportApp not implemented for transform exporter")
}