feat: resolve needed php version from composer metadata

Author: MekDrop

bin/resolve-php-version.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+
+ENGINE="$1"
+
+get_default_version() {
+  case "$1" in
+    "evert/phpdoc-md")
+      echo "7.4"
+      ;;
+    "clean/phpdoc-md")
+      echo "8.1"
+      ;;
+    *)
+      echo "ERROR: unknown engine" >&2
+      return 1
+      ;;
+  esac
+}
+
+get_constraint_from_composer_json() {
+  if [ ! -f "composer.json" ]; then
+    return 0
+  fi
+
+  python3 - <<'PY'
+import json
+
+try:
+    with open("composer.json", "r", encoding="utf-8") as file:
+        data = json.load(file)
+except Exception:
+    raise SystemExit(0)
+
+require = data.get("require", {})
+if isinstance(require, dict):
+    php_constraint = require.get("php")
+    if isinstance(php_constraint, str) and php_constraint.strip():
+        print(php_constraint.strip())
+        raise SystemExit(0)
+
+config = data.get("config", {})
+if isinstance(config, dict):
+    platform = config.get("platform", {})
+    if isinstance(platform, dict):
+        php_constraint = platform.get("php")
+        if isinstance(php_constraint, str) and php_constraint.strip():
+            print(php_constraint.strip())
+PY
+}
+
+get_constraint_from_composer_lock() {
+  if [ ! -f "composer.lock" ]; then
+    return 0
+  fi
+
+  python3 - <<'PY'
+import json
+
+try:
+    with open("composer.lock", "r", encoding="utf-8") as file:
+        data = json.load(file)
+except Exception:
+    raise SystemExit(0)
+
+for key in ("platform", "platform-overrides"):
+    values = data.get(key, {})
+    if isinstance(values, dict):
+        php_constraint = values.get("php")
+        if isinstance(php_constraint, str) and php_constraint.strip():
+            print(php_constraint.strip())
+            raise SystemExit(0)
+PY
+}
+
+normalize_constraint_to_version() {
+  local php_constraint
+  php_constraint="$1"
+
+  python3 - "$php_constraint" <<'PY'
+import re
+import sys
+
+constraint = sys.argv[1]
+match = re.search(r'(\d+)\.(\d+)', constraint)
+if match:
+    print(f"{int(match.group(1))}.{int(match.group(2))}")
+PY
+}
+
+DEFAULT_VERSION=$(get_default_version "$ENGINE") || exit 1
+DETECTED_CONSTRAINT=$(get_constraint_from_composer_json)
+
+if [ -z "$DETECTED_CONSTRAINT" ]; then
+  DETECTED_CONSTRAINT=$(get_constraint_from_composer_lock)
+fi
+
+if [ -n "$DETECTED_CONSTRAINT" ]; then
+  DETECTED_VERSION=$(normalize_constraint_to_version "$DETECTED_CONSTRAINT")
+fi
+
+if [ -n "$DETECTED_VERSION" ]; then
+  echo "$DETECTED_VERSION"
+else
+  echo "$DEFAULT_VERSION"
+fi

bin/setup.sh

@@ -8,23 +8,15 @@ NEW_WIKI_CHECKOUT_PATH="${RUNNER_TEMP}/new-wiki-${ACTION_SUFFIX}"
 TMP_BRANCH_MAP_FILE="${RUNNER_TEMP}/branches-map-${ACTION_SUFFIX}"
 ACTION_BIN_PATH="${GITHUB_ACTION_PATH}/bin"
 
-if [ "$ENGINE" == "evert/phpdoc-md" ]; then
-  NEEDED_PHP_VERSION=7.4
-elif [ "$ENGINE" == "clean/phpdoc-md" ]; then
-  NEEDED_PHP_VERSION=8.1
-else
-  echo 'ERROR: unknown engine'
+NEEDED_PHP_VERSION=$(bash "$ACTION_BIN_PATH/resolve-php-version.sh" "$ENGINE") || exit 1
 
-  exit 1
-fi;
-
-echo "OLD_WIKI_CHECKOUT_PATH=$OLD_WIKI_CHECKOUT_PATH" >> $GITHUB_ENV
-echo "NEW_WIKI_CHECKOUT_PATH=$NEW_WIKI_CHECKOUT_PATH" >> $GITHUB_ENV
-echo "NEEDED_PHP_VERSION=$NEEDED_PHP_VERSION" >> $GITHUB_ENV
-echo "ACTION_BIN_PATH=$ACTION_BIN_PATH" >> $GITHUB_ENV
-echo "TMP_BRANCH_MAP_FILE=$TMP_BRANCH_MAP_FILE" >> $GITHUB_ENV
+echo "OLD_WIKI_CHECKOUT_PATH=$OLD_WIKI_CHECKOUT_PATH" >> "$GITHUB_ENV"
+echo "NEW_WIKI_CHECKOUT_PATH=$NEW_WIKI_CHECKOUT_PATH" >> "$GITHUB_ENV"
+echo "NEEDED_PHP_VERSION=$NEEDED_PHP_VERSION" >> "$GITHUB_ENV"
+echo "ACTION_BIN_PATH=$ACTION_BIN_PATH" >> "$GITHUB_ENV"
+echo "TMP_BRANCH_MAP_FILE=$TMP_BRANCH_MAP_FILE" >> "$GITHUB_ENV"
 
 rm -rf "$OLD_WIKI_CHECKOUT_PATH" || true
 rm -rf "$NEW_WIKI_CHECKOUT_PATH" || true
 
-mkdir -p "$NEW_WIKI_CHECKOUT_PATH"
+mkdir -p "$NEW_WIKI_CHECKOUT_PATH"