feat: adds `replSource` property and command-line option

The `replSource` property specifies the frege source file that you want to
load into the repl. It is excluded in the `fregeCompile` task so that
we don't get two java class files (one from `compileFrege` and one
from the fregeRepl `:l` command) that shadow each other on the classpath.

As a result, we can make interactive changes to the `replSource` file and
use the `:r` reload command to see them.

3 files changed, 49 insertions, 10 deletions

diff --git a/src/test/java/ch/fhnw/thga/gradleplugins/Builder.java b/src/test/java/ch/fhnw/thga/gradleplugins/Builder.java
index 9293e44..d379013 100644
--- a/src/test/java/ch/fhnw/thga/gradleplugins/Builder.java
+++ b/src/test/java/ch/fhnw/thga/gradleplugins/Builder.java
@@ -15,5 +15,7 @@ public interface Builder {
 
     Builder compilerFlags(String compilerFlags);
 
+    Builder replModule(String replModule);
+
     FregeDTO build();
 }
diff --git a/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTO.java b/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTO.java
index a09bd27..bea1e81 100644
--- a/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTO.java
+++ b/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTO.java
@@ -14,9 +14,17 @@ public class FregeDTO {
     public final String outputDir;
     public final String mainModule;
     public final String compilerFlags;
-
-    public FregeDTO(String version, String release, String compilerDownloadDir, String mainSourceDir,
-            String outputDir, String mainModule, String compilerFlags) {
+    public final String replModule;
+
+    public FregeDTO(
+        String version,
+        String release,
+        String compilerDownloadDir,
+        String mainSourceDir,
+        String outputDir,
+        String mainModule,
+        String compilerFlags,
+        String replModule) {
         this.version = version;
         this.release = release;
         this.compilerDownloadDir = compilerDownloadDir;
@@ -24,6 +32,7 @@ public class FregeDTO {
         this.outputDir = outputDir;
         this.mainModule = mainModule;
         this.compilerFlags = compilerFlags;
+        this.replModule = replModule;
     }
 
     public String getVersion() {
@@ -54,6 +63,10 @@ public class FregeDTO {
         return compilerFlags;
     }
 
+    public String getReplModule() {
+        return replModule;
+    }
+
     private String getFieldValue(Field field) {
         try {
             return field.get(this).toString();
@@ -67,7 +80,9 @@ public class FregeDTO {
             return FregeDTO.class.getField(fieldName);
         } catch (NoSuchFieldException e) {
             throw new RuntimeException(
-                    String.format("Field %s not found in class %s", e.getMessage(), FregeDTO.class.getName()),
+                    String.format(
+                        "Field %s not found in class %s",
+                        e.getMessage(), FregeDTO.class.getName()),
                     e.getCause());
         }
     }
@@ -81,7 +96,8 @@ public class FregeDTO {
     }
 
     private boolean isGetterProperty(Method method) {
-        return method.getName().startsWith("get") && method.getReturnType().getName().contains("Property");
+        return method.getName().startsWith("get") &&
+               method.getReturnType().getName().contains("Property");
     }
 
     private String stripGetPrefixAndDecapitalize(String s) {
@@ -89,9 +105,14 @@ public class FregeDTO {
     }
 
     public String toBuildFile() {
-        Stream<Method> methods = Arrays.stream(FregeExtension.class.getMethods());
-        Stream<Field> fields = methods.filter(m -> isGetterProperty(m))
-                .map(m -> stripGetPrefixAndDecapitalize(m.getName())).map(name -> getField(name));
-        return fields.filter(f -> !isEmpty(f)).map(f -> toKeyValuePairs(f)).collect(Collectors.joining("\n  "));
+        Stream<Field> fields =
+            Arrays.stream(FregeExtension.class.getMethods())
+            .filter(m -> isGetterProperty(m))
+            .map(m -> stripGetPrefixAndDecapitalize(m.getName()))
+            .map(name -> getField(name));
+        return fields
+               .filter(f -> !isEmpty(f))
+               .map(f -> toKeyValuePairs(f))
+               .collect(Collectors.joining("\n  "));
     }
 }
diff --git a/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTOBuilder.java b/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTOBuilder.java
index 910114e..d3a6c52 100644
--- a/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTOBuilder.java
+++ b/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTOBuilder.java
@@ -8,6 +8,7 @@ public final class FregeDTOBuilder implements Builder {
     private String outputDir = "";
     private String mainModule = "";
     private String compilerFlags = "";
+    private String replModule = "";
 
     private static volatile FregeDTOBuilder instance;
 
@@ -72,7 +73,22 @@ public final class FregeDTOBuilder implements Builder {
         return this;
     }
 
+    @Override
+    public Builder replModule(String replModule)
+    {
+        this.replModule = replModule;
+        return this;
+    }
+
     public FregeDTO build() {
-        return new FregeDTO(version, release, compilerDownloadDir, mainSourceDir, outputDir, mainModule, compilerFlags);
+        return new FregeDTO(
+            version,
+            release,
+            compilerDownloadDir,
+            mainSourceDir,
+            outputDir,
+            mainModule,
+            compilerFlags,
+            replModule);
     }
 }