Add ~/.jrunnerpass named connection profile support

Implements .pgpass-style credential file for jrunner. Named aliases can
be used with -sc and -dc flags instead of spelling out -scu/-scn/-scp
for each invocation. Explicit flags still take priority over the file.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

jrunner/src/main/java/jrunner/jrunner.java

@@ -5,6 +5,7 @@ import java.nio.file.Files;
 import java.nio.file.Path ;
 import java.nio.file.Paths;
 import java.time.*;
+import java.io.IOException;
 
 public class jrunner {
    //static final String QUERY = "SELECT * from rlarp.osm LIMIT 100";
@@ -14,9 +15,11 @@ public class jrunner {
         String scu = "";
         String scn = "";
         String scp = "";
+        String scAlias = "";
         String dcu = "";
         String dcn = "";
         String dcp = "";
+        String dcAlias = "";
         String sq =  "";
         String dt =  "";
         Boolean trim = true;
@@ -41,24 +44,36 @@ public class jrunner {
         Timestamp tsStart = null;
         Timestamp tsEnd   = null;
 
-        msg = "jrunner version 1.1";
+        msg = "jrunner version 1.2";
+        msg = msg + nl + "-sc        source connection alias (from ~/.jrunnerpass)";
         msg = msg + nl + "-scu       source jdbc url";
         msg = msg + nl + "-scn       source username";
-        msg = msg + nl + "-scp       source passowrd";
+        msg = msg + nl + "-scp       source password";
+        msg = msg + nl + "-dc        destination connection alias (from ~/.jrunnerpass)";
         msg = msg + nl + "-dcu       destination jdbc url";
         msg = msg + nl + "-dcn       destination username";
-        msg = msg + nl + "-dcp       destination passowrd";
+        msg = msg + nl + "-dcp       destination password";
         msg = msg + nl + "-sq        path to source query";
         msg = msg + nl + "-dt        fully qualified name of destination table";
         msg = msg + nl + "-t         trim text";
         msg = msg + nl + "-c         clear target table";
         msg = msg + nl + "-f         output format (csv, tsv, table, json) - default: csv";
         msg = msg + nl + "--help     info";
+        msg = msg + nl + "";
+        msg = msg + nl + "~/.jrunnerpass format:";
+        msg = msg + nl + "  [alias]";
+        msg = msg + nl + "  url=jdbc:...";
+        msg = msg + nl + "  user=username";
+        msg = msg + nl + "  pass=password";
 
         //---------------------------------------parse args into variables-------------------------------------------------
 
         for (int i = 0; i < args.length; i = i +1 ){
             switch (args[i]) {
+                //source connection alias
+                case "-sc":
+                    scAlias = args[i+1];
+                    break;
                 //source connection string
                 case "-scu":
                     scu = args[i+1];
@@ -68,10 +83,13 @@ public class jrunner {
                     scn = args[i+1];
                     break;
                 //source password
-                //import java.time.*;
                 case "-scp":
                     scp = args[i+1];
                     break;
+                //destination connection alias
+                case "-dc":
+                    dcAlias = args[i+1];
+                    break;
                 //destination connection string
                 case "-dcu":
                     dcu = args[i+1];
@@ -133,6 +151,31 @@ public class jrunner {
             }
         }
 
+        // Resolve connection aliases from ~/.jrunnerpass
+        if (!scAlias.isEmpty() || !dcAlias.isEmpty()) {
+            Map<String, String[]> connections = loadPassFile();
+            if (!scAlias.isEmpty()) {
+                String[] sc = connections.get(scAlias);
+                if (sc == null) {
+                    System.err.println("Error: source alias '" + scAlias + "' not found in ~/.jrunnerpass");
+                    System.exit(1);
+                }
+                if (scu.isEmpty()) scu = sc[0];
+                if (scn.isEmpty()) scn = sc[1];
+                if (scp.isEmpty()) scp = sc[2];
+            }
+            if (!dcAlias.isEmpty()) {
+                String[] dc = connections.get(dcAlias);
+                if (dc == null) {
+                    System.err.println("Error: destination alias '" + dcAlias + "' not found in ~/.jrunnerpass");
+                    System.exit(1);
+                }
+                if (dcu.isEmpty()) dcu = dc[0];
+                if (dcn.isEmpty()) dcn = dc[1];
+                if (dcp.isEmpty()) dcp = dc[2];
+            }
+        }
+
         // Detect query mode when destination flags are not provided
         queryMode = dcu.isEmpty() && dcn.isEmpty() && dcp.isEmpty() && dt.isEmpty();
 
@@ -482,4 +525,47 @@ public class jrunner {
     private static String escapeTSV(String value) {
         return value.replaceAll("\t", " ").replaceAll("\n", " ").replaceAll("\r", " ");
     }
+
+    // Loads ~/.jrunnerpass and returns a map of alias -> {url, user, pass}
+    // Format:
+    //   [alias]
+    //   url=jdbc:...
+    //   user=username
+    //   pass=password
+    private static Map<String, String[]> loadPassFile() {
+        Map<String, String[]> connections = new LinkedHashMap<>();
+        Path passFile = Paths.get(System.getProperty("user.home"), ".jrunnerpass");
+        if (!Files.exists(passFile)) {
+            System.err.println("Error: ~/.jrunnerpass not found");
+            System.exit(1);
+        }
+        try {
+            String currentAlias = null;
+            String url = "", user = "", pass = "";
+            for (String line : Files.readAllLines(passFile)) {
+                line = line.trim();
+                if (line.isEmpty() || line.startsWith("#")) continue;
+                if (line.startsWith("[") && line.endsWith("]")) {
+                    if (currentAlias != null) {
+                        connections.put(currentAlias, new String[]{url, user, pass});
+                    }
+                    currentAlias = line.substring(1, line.length() - 1).trim();
+                    url = ""; user = ""; pass = "";
+                } else if (line.startsWith("url=")) {
+                    url = line.substring(4);
+                } else if (line.startsWith("user=")) {
+                    user = line.substring(5);
+                } else if (line.startsWith("pass=")) {
+                    pass = line.substring(5);
+                }
+            }
+            if (currentAlias != null) {
+                connections.put(currentAlias, new String[]{url, user, pass});
+            }
+        } catch (IOException e) {
+            System.err.println("Error reading ~/.jrunnerpass: " + e.getMessage());
+            System.exit(1);
+        }
+        return connections;
+    }
 }