Refactor: extract bump-package-version-deb(1)

builder/bump-package-version

@@ -7,24 +7,12 @@ update_version_to_meet_packaging_standards() {
     sed -e 's/\([0-9]\)-\([a-zA-Z]\)/\1~\2/')
 }
 
-add_debian_revision_to_new_version() {
-  echo "$new_version-1"
-}
-
 bump_rpm() {
   builder/bump-package-version-rpm "$new_version"
 }
 
 bump_deb() {
-  local image="debbump_package_version:dev"
+  builder/bump-package-version-deb "$new_version"
-  local L_UID=$(id -u)
-  local L_GID=$(id -g)
-  local debian_version=$(add_debian_revision_to_new_version)
-
-  docker build -t "$image" -f builder/dockerfile.bump-package-version .
-  docker run --rm -v "$PWD":/src --user "$L_UID:$L_GID" \
-    "$image" /bin/bash -c \
-    "cd /src && builder/bump-package-version-inside-docker-deb $debian_version"
 }
 
 new_version="$1"

builder/bump-package-version-deb

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -eo pipefail
+
+new_version="$1"
+
+add_debian_revision_to_new_version() {
+  echo "$new_version-1"
+}
+
+bump_deb() {
+  local image="debbump_package_version:dev"
+  local L_UID=$(id -u)
+  local L_GID=$(id -g)
+  local debian_version=$(add_debian_revision_to_new_version)
+
+  docker build -t "$image" -f builder/dockerfile.bump-package-version .
+  docker run --rm -v "$PWD":/src --user "$L_UID:$L_GID" \
+    "$image" /bin/bash -c \
+    "cd /src && builder/bump-package-version-inside-docker-deb $debian_version"
+}
+
+bump_deb