Make cabextract build incremental.

GPL/CabExtract/build.gradle

@@ -14,44 +14,6 @@ eclipse.project.name = 'GPL CabExtract'
 
 project.ext.cabextract = "cabextract-1.6"
 
-/*********************************************************************************
- * CabExtract extraction task
- *
- * Unpacks the cabextract tar file that's needed for the symbol server.  This
- * is only unpacked for building the tool; once it's built, this unzipped 
- * archive is removed.
- *********************************************************************************/
-task unpackCabExtract (type: Copy) {
- 
-	from tarTree(file("data/${cabextract}.tar.gz"))
-	into 'build/unpack'
-	
-	// Force the task to be executed every time by setting to false.
-	// This is done since configure changes the contents for a platform
-	// NOTE: this can cause the 'build/unpack' to be deleted prior to an unpack
-	outputs.upToDateWhen { false }
-	
-	doLast {
- 		// Force all unpacked files to have the same timestamp
- 		ant.touch() {
- 			fileset(dir: file("build/unpack/${cabextract}"))
-	    }
- 	}
-}
-
-/*********************************************************************************
- * CabExtract configure task
- *
- * Performs configure on a newly unpacked cabextract tar file prior to
- * performing make.
- *********************************************************************************/
-task configureCabExtract (type: Exec) {
-	group "private"
-	workingDir "build/unpack/${cabextract}"
-	executable "./configure"
-	dependsOn unpackCabExtract
-}
-
 /*********************************************************************************
  * CabExtract platform specific tasks
  *
@@ -66,12 +28,27 @@ if (['linux64', 'osx64'].contains(currentPlatform)) {
 		group "private"
 		workingDir "build/unpack/${cabextract}"
 		executable "make"
-		dependsOn configureCabExtract
-		doLast {
+		inputs.file("data/${cabextract}.tar.gz")
+		outputs.file("build/os/${currentPlatform}/cabextract")
+		// Extract archive and ./configure
+		doFirst {
 			copy {
-				from "build/unpack/${cabextract}/cabextract"
-				into "build/os/${currentPlatform}"
+				from tarTree(file("data/${cabextract}.tar.gz"))
+				into 'build/unpack'
 			}
+			// Force all unpacked files to have the same timestamp
+			ant.touch() {
+				fileset(dir: file("build/unpack/${cabextract}"))
+			}
+			exec {
+				workingDir "build/unpack/${cabextract}"
+				executable "./configure"
+			}
+		}
+		// Move out the built cabextract and delete the extracted files
+		doLast {
+			ant.move file: "build/unpack/${cabextract}/cabextract",
+				todir: "build/os/${currentPlatform}"
 			delete file("build/unpack/${cabextract}")
 		}
 	}