From c6c6061639636fc84355d6a63cbb026ca7224f50 Mon Sep 17 00:00:00 2001
From: Mark Harrah <dmharrah@gmail.com>
Date: Sat, 28 Apr 2012 18:58:38 -0400
Subject: [PATCH] basis for a resident compiler

unstable, but can be tested with -Dsbt.resident.limit=n
 n is the maximum Globals kept around
---
 .../src/main/java/xsbti/compile/CachedCompiler.java | 11 +++++++++++
 .../java/xsbti/compile/CachedCompilerProvider.java  | 10 ++++++++++
 .../main/java/xsbti/compile/DependencyChanges.java  | 13 +++++++++++++
 .../src/main/java/xsbti/compile/GlobalsCache.java   | 10 ++++++++++
 interface/src/main/java/xsbti/compile/Setup.java    |  2 ++
 5 files changed, 46 insertions(+)
 create mode 100644 interface/src/main/java/xsbti/compile/CachedCompiler.java
 create mode 100644 interface/src/main/java/xsbti/compile/CachedCompilerProvider.java
 create mode 100644 interface/src/main/java/xsbti/compile/DependencyChanges.java
 create mode 100644 interface/src/main/java/xsbti/compile/GlobalsCache.java

diff --git a/interface/src/main/java/xsbti/compile/CachedCompiler.java b/interface/src/main/java/xsbti/compile/CachedCompiler.java
new file mode 100644
index 000000000..2f97e395b
--- /dev/null
+++ b/interface/src/main/java/xsbti/compile/CachedCompiler.java
@@ -0,0 +1,11 @@
+package xsbti.compile;
+
+import xsbti.AnalysisCallback;
+import xsbti.Logger;
+import xsbti.Reporter;
+import java.io.File;
+
+public interface CachedCompiler
+{
+	public void run(File[] sources, DependencyChanges cpChanges, AnalysisCallback callback, Logger log, Reporter delegate);
+}
diff --git a/interface/src/main/java/xsbti/compile/CachedCompilerProvider.java b/interface/src/main/java/xsbti/compile/CachedCompilerProvider.java
new file mode 100644
index 000000000..43d3aaf7e
--- /dev/null
+++ b/interface/src/main/java/xsbti/compile/CachedCompilerProvider.java
@@ -0,0 +1,10 @@
+package xsbti.compile;
+
+import xsbti.Logger;
+import xsbti.Reporter;
+
+public interface CachedCompilerProvider
+{
+	ScalaInstance scalaInstance();
+	CachedCompiler newCachedCompiler(String[] arguments, Logger log, Reporter reporter);
+}
\ No newline at end of file
diff --git a/interface/src/main/java/xsbti/compile/DependencyChanges.java b/interface/src/main/java/xsbti/compile/DependencyChanges.java
new file mode 100644
index 000000000..4f6bda55a
--- /dev/null
+++ b/interface/src/main/java/xsbti/compile/DependencyChanges.java
@@ -0,0 +1,13 @@
+package xsbti.compile;
+
+	import java.io.File;
+
+// only includes changes to dependencies outside of the project
+public interface DependencyChanges
+{
+	boolean isEmpty();
+	// class files or jar files
+	File[] modifiedBinaries();
+	// class names
+	String[] modifiedClasses();
+}
\ No newline at end of file
diff --git a/interface/src/main/java/xsbti/compile/GlobalsCache.java b/interface/src/main/java/xsbti/compile/GlobalsCache.java
new file mode 100644
index 000000000..1e070a1f1
--- /dev/null
+++ b/interface/src/main/java/xsbti/compile/GlobalsCache.java
@@ -0,0 +1,10 @@
+package xsbti.compile;
+
+import xsbti.Logger;
+import xsbti.Reporter;
+
+public interface GlobalsCache
+{
+	public CachedCompiler apply(String[] args, boolean forceNew, CachedCompilerProvider provider, Logger log, Reporter reporter);
+	public void clear();
+}
diff --git a/interface/src/main/java/xsbti/compile/Setup.java b/interface/src/main/java/xsbti/compile/Setup.java
index a1a9a1ad8..cf261aa7a 100644
--- a/interface/src/main/java/xsbti/compile/Setup.java
+++ b/interface/src/main/java/xsbti/compile/Setup.java
@@ -21,4 +21,6 @@ public interface Setup<Analysis>
 	* This file can be removed to force a full recompilation. 
 	* The file should be unique and not shared between compilations. */
 	File cacheFile();
+
+	GlobalsCache cache();
 }