Add debugging for MySQL connection issue

- Test direct MySQL connection from host
- Log environment variables being set (masked)
- Help diagnose why mysqldef can't connect

Author: gfx

.github/workflows/example.yaml

@@ -80,6 +80,9 @@ jobs:
           done
           # Create the test database
           docker exec $(docker compose ps -q mysql) mysql -uroot -e "CREATE DATABASE testdb;"
+          # Test connection from host
+          echo "Testing connection from host..."
+          mysql -h localhost -P 3306 -u root -e "SHOW DATABASES;" || echo "Direct connection failed, but that's OK if mysqldef can connect"
 
       - name: Preview MySQL schema changes
         uses: ./

dist/index.js

@@ -337,6 +337,18 @@ async function run() {
                 const baselineConfig = { ...config };
                 baselineConfig.args = baselineConfig.args.map((arg) => (arg === schemaFile ? actualBaselineFile : arg));
                 core.info("Applying baseline schema to database");
+                // Debug: Log environment variables being set
+                if (baselineConfig.env) {
+                    const sanitizedEnv = { ...baselineConfig.env };
+                    // Mask any password values for security
+                    if ('MYSQL_PWD' in sanitizedEnv) {
+                        sanitizedEnv.MYSQL_PWD = sanitizedEnv.MYSQL_PWD ? '***' : '(empty)';
+                    }
+                    if ('PGPASSWORD' in sanitizedEnv) {
+                        sanitizedEnv.PGPASSWORD = sanitizedEnv.PGPASSWORD ? '***' : '(empty)';
+                    }
+                    core.debug(`Environment variables: ${JSON.stringify(sanitizedEnv)}`);
+                }
                 try {
                     await runSqldef(binaryPath, baselineConfig);
                 }

dist/index.js.map

@@ -339,6 +339,18 @@ async function run(): Promise<void> {
                 baselineConfig.args = baselineConfig.args.map((arg) => (arg === schemaFile ? actualBaselineFile : arg));
 
                 core.info("Applying baseline schema to database");
+                // Debug: Log environment variables being set
+                if (baselineConfig.env) {
+                    const sanitizedEnv = { ...baselineConfig.env };
+                    // Mask any password values for security
+                    if ("MYSQL_PWD" in sanitizedEnv) {
+                        sanitizedEnv.MYSQL_PWD = sanitizedEnv.MYSQL_PWD ? "***" : "(empty)";
+                    }
+                    if ("PGPASSWORD" in sanitizedEnv) {
+                        sanitizedEnv.PGPASSWORD = sanitizedEnv.PGPASSWORD ? "***" : "(empty)";
+                    }
+                    core.debug(`Environment variables: ${JSON.stringify(sanitizedEnv)}`);
+                }
                 try {
                     await runSqldef(binaryPath, baselineConfig);
                 } catch (error) {