feat(assets): calculate checksum for all assets and upload it

internal/assets/assets.go

@@ -0,0 +1,79 @@
+package assets
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/Nightapes/go-semantic-release/pkg/config"
+	"github.com/pkg/errors"
+)
+
+// Container struct
+type Container struct {
+	Assets     []*Asset
+	repository string
+	algorithm  string
+}
+
+//New container for assets
+func New(repository, algorithm string) *Container {
+	return &Container{
+		Assets:     []*Asset{},
+		repository: repository,
+		algorithm:  algorithm,
+	}
+}
+
+// Add assets to the list
+func (a *Container) Add(assetConfigs ...config.Asset) error {
+	for _, assetConfig := range assetConfigs {
+		asset, err := NewAsset(a.repository, assetConfig, a.algorithm)
+		if err != nil {
+			return err
+		}
+		a.Assets = append(a.Assets, asset)
+	}
+	return nil
+}
+
+func (a *Container) All() []*Asset {
+	return a.Assets
+}
+
+func (a *Container) GenerateChecksum() error {
+	checksumFile, err := ioutil.TempFile(os.TempDir(), "checksum.*.txt")
+	if err != nil {
+		return errors.Wrap(err, "Could not generate tmp file for checksum")
+	}
+	defer checksumFile.Close()
+	lines := []string{}
+	for _, asset := range a.Assets {
+		checksum, err := asset.getChecksum()
+		if err != nil {
+			return err
+		}
+		lines = append(lines, fmt.Sprintf("%s %s", checksum, asset.GetName()))
+	}
+
+	w := bufio.NewWriter(checksumFile)
+	for _, line := range lines {
+		fmt.Fprintln(w, line)
+	}
+
+	filePath, err := filepath.Abs(checksumFile.Name())
+	if err != nil {
+		return err
+	}
+
+	a.Assets = append(a.Assets, &Asset{
+		path:         filePath,
+		name:         "checksum.txt",
+		isCompressed: false,
+		algorithm:    "",
+	})
+	return w.Flush()
+
+}