Add CLI alternate syntax for shade relocation

--srg-in ../jars/1.4.7/cb2pkgmcp.srg --shade-relocation net.minecraft.server=net.minecraft.server.v1_4_R1,org.bouncycastle=net.minecraft.v1_4_R1.org.bouncycastle
--srg-in ../jars/1.4.7/cb2pkgmcp.srg@net.minecraft.server=net.minecraft.server.v1_4_R1,org.bouncycastle=net.minecraft.v1_4_R1.org.bouncycastle

src/main/java/net/md_5/specialsource/JarMapping.java

@@ -48,6 +48,7 @@ public class JarMapping {
         loadMappings(reader, shader);
     }
 
+
     /**
      * Set the inheritance map used for caching superclass/interfaces. This call be omitted to
      * use a local cache, or set to your own global cache.
@@ -91,6 +92,30 @@ public class JarMapping {
         return mapped;
     }
 
+    /**
+     * Load mappings given a (path) specification, optionally relocated
+     * through a suffix @oldpath1=newpath1,oldpath2=newpath2...
+     *
+     * Intended for convenient command-line usage.
+     */
+    public void loadMappings(String spec) throws IOException {
+        int n = spec.lastIndexOf('@');
+        String path;
+        ShadeRelocationSimulator shader;
+
+        if (n == -1) {
+            path = spec;
+            shader = null;
+        } else {
+            path = spec.substring(0, n);
+            shader = new ShadeRelocationSimulator(spec.substring(n + 1));
+        }
+
+        BufferedReader reader = new BufferedReader(new FileReader(path));
+
+        loadMappings(reader, shader);
+    }
+
     /**
      * Load a mapping given a .csrg file
      *

src/main/java/net/md_5/specialsource/ShadeRelocationSimulator.java

@@ -28,10 +28,7 @@
  */
 package net.md_5.specialsource;
 
-import java.util.HashMap;
+import java.util.*;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
 
 /**
  * Simulate a small subset of the maven-shade-plugin class relocation
@@ -72,10 +69,15 @@ public class ShadeRelocationSimulator {
             String pattern = pair.substring(0, index);
             String shadedPattern = pair.substring(index + 1);
 
+            System.out.println("reloc:"+pattern+" -> "+shadedPattern);
             relocations.put(toInternalName(pattern), toInternalName(shadedPattern));
         }
     }
 
+    public ShadeRelocationSimulator(String string) {
+        this(Arrays.asList(string.split(",")));
+    }
+
     public String shadeClassName(String className) {
         for (Map.Entry<String, String> entry : relocations.entrySet()) {
             String pattern = entry.getKey();

src/main/java/net/md_5/specialsource/SpecialSource.java

@@ -33,6 +33,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
+import com.google.common.base.Joiner;
 import com.google.common.collect.BiMap;
 import com.google.common.collect.HashBiMap;
 import joptsimple.OptionException;
@@ -68,7 +69,8 @@ public class SpecialSource {
 
                 acceptsAll(asList("m", "srg-in"), "Mapping file input")
                         .withRequiredArg()
-                        .ofType(File.class);
+                        .describedAs("path[@relocations...]")
+                        .ofType(String.class);
 
                 acceptsAll(asList("i", "in-jar"), "Input jar to remap")
                         .withRequiredArg()
@@ -131,20 +133,20 @@ public class SpecialSource {
             jarMapping = new JarMapping(visitor1, visitor2, (File) options.valueOf("srg-out"), options.has("compact"), options.has("generate-dupes"));
         } else if (options.has("srg-in")) {
             // Load mappings, possibly shaded
-            ShadeRelocationSimulator shadeRelocationSimulator = null;
+            String spec = (String) options.valueOf("srg-in");
+
             if (options.has("shade-relocation")) {
+                // legacy command-line option support
+                // (new way is filename@... from the command-line, or loadMappings() programmatically)
                 @SuppressWarnings("unchecked")
                 List<String> relocations = (List<String>) options.valuesOf("shade-relocation");
-                shadeRelocationSimulator = new ShadeRelocationSimulator(relocations);
+                spec += "@" + Joiner.on(',').join(relocations);
-
-                for (Map.Entry<String, String> entry : shadeRelocationSimulator.relocations.entrySet()) {
-                    log("Relocation: " + entry.getKey() + " -> " + entry.getValue());
-                }
             }
 
+            jarMapping = new JarMapping();
+
             log("Loading mappings");
-            BufferedReader reader = new BufferedReader(new FileReader((File) options.valueOf("srg-in")));
+            jarMapping.loadMappings(spec);
-            jarMapping = new JarMapping(reader, shadeRelocationSimulator);
         } else {
             System.err.println("No mappings given, first-jar/second-jar or srg-in required");
             parser.printHelpOn(System.err);