Working code.

src/com/olexyn/Main.java

@@ -1,8 +0,0 @@
-package com.olexyn;
-
-public class Main {
-
-    public static void main(String[] args) {
-	// write your code here
-    }
-}

src/com/olexyn/ensync/Execute.java

@@ -0,0 +1,45 @@
+package com.olexyn.ensync;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.util.List;
+
+public class Execute {
+
+
+    /**
+     * @param cmd an array representing a shell command
+     * @return <i>TwoBr</i>  class, containing two BufferedReaders,
+     * <i>output</i> and  <i>error</i>
+     * @see <i>output</i>  BufferedReader, corresponds to STDOUT
+     * <i>error</i>  BufferedReader, corresponds to STDERR
+     */
+    public TwoBr execute(String cmd[]) {
+        TwoBr twobr = new TwoBr();
+        try {
+            Process process = Runtime.getRuntime().exec(cmd);
+            process.waitFor();
+            twobr.output = new BufferedReader(new InputStreamReader(process.getInputStream()));
+            twobr.error = new BufferedReader(new InputStreamReader(process.getErrorStream()));
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return twobr;
+    }
+
+    public void executeBatch(List<String[]> batch){
+
+        for (int i =0; i<batch.size();i++){
+            execute(batch.get(i));
+        }
+
+    }
+
+
+
+
+    public class TwoBr {
+        public BufferedReader output;
+        public BufferedReader error;
+    }
+}

src/com/olexyn/ensync/Main.java

@@ -0,0 +1,24 @@
+package com.olexyn.ensync;
+
+import java.io.BufferedReader;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Main {
+
+
+
+    public static void main(String[] args) {
+
+
+        String conf = new Tools().getConf();
+        List<String[]> cmdBuffer = new Routines().parseConfToCmdBuffer(conf);
+
+        System.out.println("bar");
+        new Execute().executeBatch(cmdBuffer);
+
+
+        String br = null;
+
+    }
+}

src/com/olexyn/ensync/README.md

@@ -0,0 +1,33 @@
+### Table of Contents
+1. [About](#about)
+4. [Package Contents](#package-contents)
+5. [Issues](#issues)
+
+<br>
+<br>
+
+### About <a name="about"></a> 
+Sync files across directories:
+* with rsync
+* using config file: sync.conf
+* at system start-up (TODO)
+
+<br>
+<br>
+
+### Package Contents <a name="package-contents"></a> 
+
+| Class         | Description |
+|---------------|-------------|
+| Execute       | Issues shell commands.|
+| Main          | Main class. Run from here.|
+| Routines      | Contains higher level routines.|
+| Tools         | Simple tools used by other classes.|
+
+<br>
+<br>
+
+### Issues <a name="issues"></a> 
+
+- What about parallel Threads?
+- What about error handling? (i.e. if a wed-directory is not aviable)

src/com/olexyn/ensync/Routines.java

@@ -0,0 +1,51 @@
+package com.olexyn.ensync;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Routines {
+
+
+    public List<String[]> parseConfToCmdBuffer(String conf) {
+
+
+        List<String[]> cmdBuffer = new ArrayList<>();
+
+        String[] confLines = conf.split("\n");
+        for (int i = 0; i < confLines.length; i++) {
+            String line = confLines[i];
+            if (!line.startsWith("#")) {
+
+                if (line.contains("----")) {
+                    // dirA <- urvtW ---- urvtW -> dirB
+                    String dirA = line.split(" ---- ")[0].split(" <- ")[0];
+                    String optA = line.split(" ---- ")[0].split(" <- ")[1];
+                    String optB = line.split(" ---- ")[1].split(" -> ")[0];
+                    String dirB = line.split(" ---- ")[1].split(" -> ")[1];
+
+                    cmdBuffer.add(new String[]{"rsync",
+                                               "-" + optA,
+                                               dirB,
+                                               dirA});
+                    cmdBuffer.add(new String[]{"rsync",
+                                               "-" + optB,
+                                               dirA,
+                                               dirB});
+                } else if (line.contains("->")) {
+                    // dirA -- urvtW -> dirB
+                    String dirA = line.split(" -- ")[0];
+                    String optA = line.split(" -- ")[1].split(" -> ")[0];
+                    String dirB = line.split(" -> ")[1];
+
+                    cmdBuffer.add(new String[]{"rsync",
+                                               "-" + optA,
+                                               dirA,
+                                               dirB});
+                }
+
+
+            }
+        }
+        return cmdBuffer;
+    }
+}

src/com/olexyn/ensync/Tools.java

@@ -0,0 +1,37 @@
+package com.olexyn.ensync;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Tools {
+
+    private final Execute x;
+
+    public Tools() {
+        x = new Execute();
+    }
+
+
+    /**
+     */
+    public void rsync(String param , String source , String destination) {
+        //
+        BufferedReader foo = x.execute(new String[]{"rsync", param, source, destination}).output;
+    }
+
+    public String getConf(){
+        BufferedReader output = x.execute(new String[]{"cat", System.getProperty("user.dir")+"/src/com/olexyn/ensync/sync.conf"}).output;
+        return brToString(output);
+    }
+
+    public String brToString(BufferedReader br) {
+        StringBuilder sb = new StringBuilder();
+        Object[] br_array = br.lines().toArray();
+        for (int i = 0; i < br_array.length; i++) {
+            sb.append(br_array[i].toString() + "\n");
+        }
+        return sb.toString();
+    }
+}

src/com/olexyn/ensync/sync.conf

@@ -0,0 +1,13 @@
+# -u update
+# -r recursive
+# -v verbose
+# -t keep modification times
+# -W whole file (faster if network bandwith is faster then disk bandwith)
+#
+# examples:
+# ./dirA -- urvtW -> ./dirB
+# ./dirA <- urvtW ---- urvtW -> ./dirB
+/home/user/ws/idea/env-sync/src/com/olexyn/ensync/tmp/in/ <- urvtW ---- urvtW -> /home/user/ws/idea/env-sync/src/com/olexyn/ensync/tmp/out/
+# backup
+# /home/user/ws/ -- urvtW -> /media/time/backup/auto/ws
+/home/user/wiki/ -- urvtW -> /media/time/backup/auto/wiki