From 7d269b2558b781d9f1265a12b1e245315412e02a Mon Sep 17 00:00:00 2001
From: "David A. Madore" <david+git@madore.org>
Date: Thu, 1 Sep 2011 18:36:00 +0200
Subject: Introduce (limited) support for PG* environment variables and .pgpass
 file.

---
 .../damlengine/WeblogDatabaseConnection.java       | 51 ++++++++++++++++++++--
 1 file changed, 48 insertions(+), 3 deletions(-)

diff --git a/org/madore/damlengine/WeblogDatabaseConnection.java b/org/madore/damlengine/WeblogDatabaseConnection.java
index c88f5a8..9347406 100644
--- a/org/madore/damlengine/WeblogDatabaseConnection.java
+++ b/org/madore/damlengine/WeblogDatabaseConnection.java
@@ -1,6 +1,10 @@
 package org.madore.damlengine;
 
 import java.util.Properties;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+import java.io.BufferedReader;
+import java.io.IOException;
 import java.sql.Connection;
 import java.sql.SQLException;
 import org.postgresql.Driver;
@@ -16,10 +20,51 @@ public final class WeblogDatabaseConnection {
     public static Connection getConnection()
         throws SQLException {
 	if ( conn == null ) {
-	    final String dbUrl = "jdbc:postgresql://localhost/weblog";
+	    String dbHost = System.getenv("PGHOST");
+	    if ( dbHost == null )
+		dbHost = "localhost";
+	    String dbPort = System.getenv("PGPORT");
+	    if ( dbPort == null )
+		dbPort = "5432";
+	    String dbName = "weblog";
+	    String dbUser = System.getenv("PGUSER");
+	    if ( dbUser == null )
+		dbUser = System.getenv("USER");
+	    if ( dbUser == null )
+		dbUser = System.getProperty("user.name");
+	    if ( dbUser == null )
+		dbUser = dbName;
+	    String dbPass = System.getenv("PGPASSWORD");
+	    if ( dbPass == null )
+		try {
+		    String dbPassFile = System.getenv("PGPASSFILE");
+		    if ( dbPassFile == null )
+			dbPassFile = System.getProperty("user.home")
+			    + "/.pgpass";
+		    BufferedReader buf
+			= new BufferedReader(new InputStreamReader(new FileInputStream(dbPassFile)));
+		    String line;
+		    while ( ( line = buf.readLine() ) != null ) {
+			String[] elts = line.split(":");
+			if ( elts.length == 5 
+			     && ( elts[0].equals("*") || elts[0].equals(dbHost) )
+			     && ( elts[1].equals("*") || elts[1].equals(dbPort) )
+			     && ( elts[2].equals("*") || elts[2].equals(dbName) )
+			     && ( elts[3].equals("*") || elts[3].equals(dbUser) ) ) {
+			    dbPass = elts[4];
+			    break;
+			}
+		    }
+		} catch (IOException e) {
+		    // Ignore
+		}
+	    if ( dbPass == null )
+		dbPass = "";
+	    final String dbUrl
+		= "jdbc:postgresql://"+dbHost+":"+dbPort+"/"+dbName;
 	    final Properties dbProps = new Properties();
-	    dbProps.setProperty("user", "david");
-	    dbProps.setProperty("password", "IHATETHISWHYCANTIUSEUNIXDOMAINSOCKETS");
+	    dbProps.setProperty("user", dbUser);
+	    dbProps.setProperty("password", dbPass);
 	    dbProps.setProperty("ssl", "true");
 	    dbProps.setProperty("sslfactory", "org.postgresql.ssl.NonValidatingFactory");
 	    conn = (new Driver()).connect(dbUrl, dbProps);
-- 
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