Added many, many more actions.

utils/get-latest-version/action.yaml

@@ -0,0 +1,44 @@
+name: get-latest-version
+description: "Get the latest version of a package."
+inputs:
+  versions:
+    description: "Newline-seperated list of package versions."
+    required: true
+  filter:
+    description: "String to filter by."
+    required: false
+  filterIsExpression:
+    description: "Is the first filter a Regular Expression? Values: true, false."
+    required: false
+    default: "false"
+  stripPrerelease:
+    description: "Whether or not to strip prerelease versions. Values: true, false."
+    required: false
+    default: "false"
+outputs:
+  version:
+    description: "The latest version of the specified package."
+    value: ${{ steps.parse.outputs.version }}
+runs:
+  using: "composite"
+  steps:
+  - name: "Get latest package."
+    id: parse
+    run: |
+      VERSIONS="${{ inputs.versions }}"
+      # Filter versions, sort them, and get the latest one
+      if [[ "${{ inputs.filterIsExpression }}" == "true" ]]; then
+        EXPRESSION_FLAG="-E"
+      fi
+      if [[ "${{ inputs.stripPrerelease }}" == "true" ]]; then
+        VERSIONS=$(echo "$VERSIONS" | grep -E "^(v)?[0-9]+\.[0-9]+\.[0-9]+(\.[0-9]+)?$")
+      fi
+      RESULT=$(echo "$VERSIONS" | grep $EXPRESSION_FLAG "${{ inputs.filter }}" || echo "error")
+
+      VERSION=$(echo "$RESULT" | sort -rV | head -1)
+      
+      if [[ "$RESULT" != "error" ]]; then
+        echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+      fi
+      # No error if no versions found.
+    shell: bash