Fix MySQL connection by using 127.0.0.1 instead of localhost

MySQL in Docker requires TCP connection, not Unix socket. Using localhost
attempts to connect via socket, while 127.0.0.1 forces TCP connection.

Author: gfx

.github/workflows/example.yaml

@@ -82,7 +82,7 @@ jobs:
           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"
+          mysql -h 127.0.0.1 -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: ./
@@ -93,7 +93,7 @@ jobs:
           schema-file: examples/mysqldef-desired.sql
           mysql-user: root
           mysql-password: ''
-          mysql-host: localhost
+          mysql-host: 127.0.0.1
           mysql-port: 3306
           mysql-database: testdb
 

dist/index.js

@@ -120,7 +120,7 @@ function getCommandConfig(command) {
         case "mysqldef": {
             const user = core.getInput("mysql-user");
             const password = core.getInput("mysql-password");
-            const host = core.getInput("mysql-host") || "localhost";
+            const host = core.getInput("mysql-host") || "127.0.0.1";
             const port = core.getInput("mysql-port") || "3306";
             const database = core.getInput("mysql-database");
             config.args.push("-h", host, "-P", port);
@@ -341,11 +341,11 @@ async function run() {
                 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 ("MYSQL_PWD" in sanitizedEnv) {
+                        sanitizedEnv.MYSQL_PWD = sanitizedEnv.MYSQL_PWD ? "***" : "(empty)";
                     }
-                    if ('PGPASSWORD' in sanitizedEnv) {
-                        sanitizedEnv.PGPASSWORD = sanitizedEnv.PGPASSWORD ? '***' : '(empty)';
+                    if ("PGPASSWORD" in sanitizedEnv) {
+                        sanitizedEnv.PGPASSWORD = sanitizedEnv.PGPASSWORD ? "***" : "(empty)";
                     }
                     core.debug(`Environment variables: ${JSON.stringify(sanitizedEnv)}`);
                 }

dist/index.js.map

@@ -94,7 +94,7 @@ function getCommandConfig(command: string): CommandConfig {
         case "mysqldef": {
             const user = core.getInput("mysql-user");
             const password = core.getInput("mysql-password");
-            const host = core.getInput("mysql-host") || "localhost";
+            const host = core.getInput("mysql-host") || "127.0.0.1";
             const port = core.getInput("mysql-port") || "3306";
             const database = core.getInput("mysql-database");