Add missing script

Author: m-houston

scripts/is_valid_increment.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/bash
+# Determines whether a version increment to a package is valid
+
+is_valid_increment() {
+  local current="$1"
+  local next="$2"
+
+  if [[ "$current" == "null" ]]; then
+    if [[ "$next" == "1.0.0" ]]; then
+      return 0  # valid initial version
+    else
+      return 1  # invalid first version
+    fi
+  fi
+
+  IFS='.' read -r curr_major curr_minor curr_patch <<< "$current"
+  IFS='.' read -r new_major new_minor new_patch <<< "$next"
+
+  if (( new_major == curr_major && new_minor == curr_minor && new_patch == curr_patch + 1 )); then
+    return 0  # valid patch bump
+  elif (( new_major == curr_major && new_minor == curr_minor + 1 && new_patch == 0 )); then
+    return 0  # valid minor bump
+  elif (( new_major == curr_major + 1 && new_minor == 0 && new_patch == 0 )); then
+    return 0  # valid major bump
+  else
+    return 1  # invalid or skipped
+  fi
+}