[#932] adm: Move InitializeContext to util package

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

cmd/frostfs-adm/internal/modules/morph/util/util.go

@@ -1,10 +1,14 @@
 package util
 
 import (
+	"archive/tar"
+	"compress/gzip"
 	"errors"
 	"fmt"
+	"io"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-adm/internal/modules/config"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring"
@@ -84,3 +88,72 @@ func NewActor(c actor.RPCActor, committeeAcc *wallet.Account) (*actor.Actor, err
 		Account: committeeAcc,
 	}})
 }
+
+func ReadContract(ctrPath, ctrName string) (*ContractState, error) {
+	rawNef, err := os.ReadFile(filepath.Join(ctrPath, ctrName+"_contract.nef"))
+	if err != nil {
+		return nil, fmt.Errorf("can't read NEF file for %s contract: %w", ctrName, err)
+	}
+	rawManif, err := os.ReadFile(filepath.Join(ctrPath, "config.json"))
+	if err != nil {
+		return nil, fmt.Errorf("can't read manifest file for %s contract: %w", ctrName, err)
+	}
+
+	cs := &ContractState{
+		RawNEF:      rawNef,
+		RawManifest: rawManif,
+	}
+
+	return cs, cs.Parse()
+}
+
+func ReadContractsFromArchive(file io.Reader, names []string) (map[string]*ContractState, error) {
+	m := make(map[string]*ContractState, len(names))
+	for i := range names {
+		m[names[i]] = new(ContractState)
+	}
+
+	gr, err := gzip.NewReader(file)
+	if err != nil {
+		return nil, fmt.Errorf("contracts file must be tar.gz archive: %w", err)
+	}
+
+	r := tar.NewReader(gr)
+	for h, err := r.Next(); ; h, err = r.Next() {
+		if err != nil {
+			break
+		}
+
+		dir, _ := filepath.Split(h.Name)
+		ctrName := filepath.Base(dir)
+
+		cs, ok := m[ctrName]
+		if !ok {
+			continue
+		}
+
+		switch {
+		case strings.HasSuffix(h.Name, filepath.Join(ctrName, ctrName+"_contract.nef")):
+			cs.RawNEF, err = io.ReadAll(r)
+			if err != nil {
+				return nil, fmt.Errorf("can't read NEF file for %s contract: %w", ctrName, err)
+			}
+		case strings.HasSuffix(h.Name, "config.json"):
+			cs.RawManifest, err = io.ReadAll(r)
+			if err != nil {
+				return nil, fmt.Errorf("can't read manifest file for %s contract: %w", ctrName, err)
+			}
+		}
+		m[ctrName] = cs
+	}
+
+	for ctrName, cs := range m {
+		if cs.RawNEF == nil {
+			return nil, fmt.Errorf("NEF for %s contract wasn't found", ctrName)
+		}
+		if cs.RawManifest == nil {
+			return nil, fmt.Errorf("manifest for %s contract wasn't found", ctrName)
+		}
+	}
+	return m, nil
+}