feat(hooks): add pre and post release hooks

internal/hooks/hooks.go

@@ -0,0 +1,71 @@
+package hooks
+
+import (
+	"bufio"
+	"os/exec"
+	"strings"
+
+	"github.com/Nightapes/go-semantic-release/internal/shared"
+	"github.com/Nightapes/go-semantic-release/pkg/config"
+	log "github.com/sirupsen/logrus"
+)
+
+//Hooks struct
+type Hooks struct {
+	version *shared.ReleaseVersion
+	config  *config.ReleaseConfig
+}
+
+// New hooks struct
+func New(config *config.ReleaseConfig, version *shared.ReleaseVersion) *Hooks {
+	return &Hooks{
+		config:  config,
+		version: version,
+	}
+}
+
+// PreRelease runs before creating release
+func (h *Hooks) PreRelease() error {
+	log.Infof("Run pre release hooks")
+	for _, cmd := range h.config.Hooks.PreRelease {
+		log.Debugf("Run %s", cmd)
+		err := h.runCommand(cmd)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// PostRelease runs after creating release
+func (h *Hooks) PostRelease() error {
+	log.Infof("Run post release hooks")
+	for _, cmd := range h.config.Hooks.PostRelease {
+		err := h.runCommand(cmd)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (h *Hooks) runCommand(command string) error {
+
+	splittedCmd := strings.Split(strings.ReplaceAll(command, "$RELEASE_VERSION", h.version.Next.Version.String()), " ")
+
+	cmd := exec.Command(splittedCmd[0], splittedCmd[1:]...)
+
+	cmdReader, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+
+	scanner := bufio.NewScanner(cmdReader)
+	go func() {
+		for scanner.Scan() {
+			log.WithField("cmd", splittedCmd[0]).Infof("%s\n", scanner.Text())
+		}
+	}()
+
+	return cmd.Run()
+}