package compiler import ( "errors" "fmt" "io/fs" "path" "path/filepath" cueerrors "cuelang.org/go/cue/errors" cueload "cuelang.org/go/cue/load" ) // Build a cue configuration tree from the files in fs. func Build(src string, overlays map[string]fs.FS, args ...string) (*Value, error) { c := DefaultCompiler buildConfig := &cueload.Config{ Dir: src, Overlay: map[string]cueload.Source{}, } // Map the source files into the overlay for mnt, f := range overlays { f := f mnt := mnt err := fs.WalkDir(f, ".", func(p string, entry fs.DirEntry, err error) error { if err != nil { return err } if !entry.Type().IsRegular() { return nil } if filepath.Ext(entry.Name()) != ".cue" { return nil } contents, err := fs.ReadFile(f, p) if err != nil { return fmt.Errorf("%s: %w", p, err) } overlayPath := path.Join(buildConfig.Dir, mnt, p) buildConfig.Overlay[overlayPath] = cueload.FromBytes(contents) return nil }) if err != nil { return nil, err } } instances := cueload.Instances(args, buildConfig) if len(instances) != 1 { return nil, errors.New("only one package is supported at a time") } for _, value := range instances { if value.Err != nil { return nil, value.Err } } v, err := c.Context.BuildInstances(instances) if err != nil { return nil, errors.New(cueerrors.Details(err, &cueerrors.Config{})) } for _, value := range v { if value.Err() != nil { return nil, value.Err() } } if len(v) != 1 { return nil, errors.New("internal: wrong number of values") } return Wrap(v[0]), nil }