Add semantic version comparison.

bin/version-compare.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+if [[ $1 == 'latest' ]] || [[ $1 == 'dev' ]] || [[ $1 == 'nightly' ]]
+then
+	# Set first arg to a huge number considering latest, dev or nightly to be the highest version.
+	set -- 1000000 $2 $3
+fi
+
+if [[ $2 == 'latest' ]] || [[ $2 == 'dev' ]] || [[ $2 == 'nightly' ]]
+then
+	# Set second arg to a huge number considering latest, dev or nightly to be the highest version.
+	set -- $1 1000000 $3
+fi
+
+if dpkg --compare-versions $1 $3 $2
+then
+	echo "result=true" >> $GITHUB_OUTPUT
+else
+	echo "result=false" >> $GITHUB_OUTPUT
+fi

phpunit/action.yml

@@ -30,9 +30,16 @@ runs:
         coverage: none
         php-version: ${{ inputs.php-version }}
 
-    - name: Clean PHP Dependencies
+    - name: Check version requirement
+      id: version-compare
+      uses: polylang/actions/version-compare@ver-comp
+      with:
+        head: ${{ inputs.wordpress-version }}
+        base: "5.9"
+
+    - name: Clean PHP dependencies
       run: |
-        if [[ ${{ inputs.wordpress-version }} == "5.8.x" ]]; then
+        if [[ ${{ steps.version-compare.outputs.result }} == true ]]; then
           composer require --no-interaction --no-update --ignore-platform-reqs --dev "phpunit/phpunit ^7.5"
         fi
         composer remove --no-interaction --no-update --dev "phpstan/phpstan"
@@ -50,7 +57,10 @@ runs:
         version: ${{ inputs.wordpress-version }}
 
     - name: Set up plugins and themes dependencies
-      run: "bash ./tests/bin/install-plugins.sh"
+      run: |
+        if [[ -f ./tests/bin/install-plugins.sh ]]; then
+          bash ./tests/bin/install-plugins.sh
+        fi
       shell: bash
 
     - name: Run PHPUnit tests

version-compare/action.yml

@@ -0,0 +1,35 @@
+name: Sementic Versions Compare
+
+description: Compares two versions. If 'dev', 'nightly' or 'latest' is given it'll be considered as the highest version possible.
+
+inputs:
+  head:
+    description: First version number.
+    required: true
+    type: string
+  base:
+    description: Second version number.
+    required: true
+    type: string
+  operator:
+    description: Operator, accepts 'lt', 'gt' and 'eq'. Default to 'lt'.
+    required: false
+    type: string
+    default: 'lt'
+
+outputs:
+  result:
+    description: Whether or not the version comparison it correct.
+    value: ${{ steps.compare.outputs.result }}
+
+permissions:
+  contents: read
+
+runs:
+  using: 'composite'
+
+  steps:
+  - name: Compare versions
+    id: compare
+    run: bash ${{ github.action_path }}/../bin/version-compare.sh "${{ inputs.head }}" "${{ inputs.base }}" "${{ inputs.operator }}"
+    shell: bash