Make dedicated package for release archive handling

This is the initial minimal refactoring for what will eventually be a more significant package.

Author: per1234

internal/command/sync/sync.go

@@ -37,6 +37,7 @@ import (
 	"github.com/arduino/libraries-repository-engine/internal/configuration"
 	"github.com/arduino/libraries-repository-engine/internal/feedback"
 	"github.com/arduino/libraries-repository-engine/internal/libraries"
+	"github.com/arduino/libraries-repository-engine/internal/libraries/archive"
 	"github.com/arduino/libraries-repository-engine/internal/libraries/db"
 	"github.com/arduino/libraries-repository-engine/internal/libraries/gitutils"
 	"github.com/arduino/libraries-repository-engine/internal/libraries/hash"
@@ -268,10 +269,10 @@ func syncLibraryTaggedRelease(logger *log.Logger, repo *libraries.Repository, ta
 		releaseLog += formattedReport
 	}
 
-	zipName := libraries.ZipFolderName(library)
+	zipName := archive.ZipFolderName(library)
 	lib := filepath.Base(filepath.Clean(filepath.Join(repo.FolderPath, "..")))
 	host := filepath.Base(filepath.Clean(filepath.Join(repo.FolderPath, "..", "..")))
-	zipFilePath, err := libraries.ZipRepo(repo.FolderPath, filepath.Join(config.LibrariesFolder, host, lib), zipName)
+	zipFilePath, err := archive.ZipRepo(repo.FolderPath, filepath.Join(config.LibrariesFolder, host, lib), zipName)
 	if err != nil {
 		return fmt.Errorf("Error while zipping library: %s", err)
 	}

internal/libraries/repoarchive.go renamed to internal/libraries/archive/archive.go

@@ -21,7 +21,8 @@
 // Arduino software without disclosing the source code of your own applications.
 // To purchase a commercial license, send an email to license@arduino.cc.
 
-package libraries
+// Package archive handles the library release archive.
+package archive
 
 import (
 	"os"

internal/libraries/git_integration_test.go

@@ -29,6 +29,7 @@ import (
 	"path/filepath"
 	"testing"
 
+	"github.com/arduino/libraries-repository-engine/internal/libraries/archive"
 	"github.com/arduino/libraries-repository-engine/internal/libraries/db"
 	"github.com/arduino/libraries-repository-engine/internal/libraries/gitutils"
 	"github.com/stretchr/testify/require"
@@ -68,11 +69,11 @@ func TestUpdateLibraryJson(t *testing.T) {
 		require.NoError(t, err)
 		require.NotNil(t, library)
 
-		zipFolderName := ZipFolderName(library)
+		zipFolderName := archive.ZipFolderName(library)
 
 		release := db.FromLibraryToRelease(library)
 
-		zipFilePath, err := ZipRepo(r.FolderPath, librariesRepo, zipFolderName)
+		zipFilePath, err := archive.ZipRepo(r.FolderPath, librariesRepo, zipFolderName)
 		require.NoError(t, err)
 		require.NotEmpty(t, zipFilePath)