Fix local file mod dependencies (#430)

* ModProcessor: Add more descriptive error TR output error message

* Fix flatDir/files/fileTree mod dependencies

* Add clarifying comment

* Use hash as a placeholder version

* ProjectTestTrait: Copy instead of reading and writing text

This allows having jars and other binary data in tests.

* Add integration test for local file dependencies

* Use File.bytes instead of Files.copy

* Use truncated SHA256 instead of murmur3

2 files changed, 51 insertions, 1 deletions

diff --git a/src/test/groovy/net/fabricmc/loom/test/integration/LocalFileDependencyTest.groovy b/src/test/groovy/net/fabricmc/loom/test/integration/LocalFileDependencyTest.groovy
new file mode 100644
index 00000000..69461987
--- /dev/null
+++ b/src/test/groovy/net/fabricmc/loom/test/integration/LocalFileDependencyTest.groovy
@@ -0,0 +1,50 @@
+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2016, 2017, 2018 FabricMC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.fabricmc.loom.test.integration
+
+import net.fabricmc.loom.test.util.ProjectTestTrait
+import spock.lang.Specification
+import spock.lang.Unroll
+
+import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
+
+class LocalFileDependencyTest extends Specification implements ProjectTestTrait {
+	@Override
+	String name() {
+		"localFileDependency"
+	}
+
+	@Unroll
+	def "build (gradle #gradle)"() {
+		when:
+			def result = create("build", gradle)
+		then:
+			result.task(":build").outcome == SUCCESS
+		where:
+			gradle              | _
+			DEFAULT_GRADLE      | _
+			PRE_RELEASE_GRADLE  | _
+	}
+}
diff --git a/src/test/groovy/net/fabricmc/loom/test/util/ProjectTestTrait.groovy b/src/test/groovy/net/fabricmc/loom/test/util/ProjectTestTrait.groovy
index 28901dd7..7097681f 100644
--- a/src/test/groovy/net/fabricmc/loom/test/util/ProjectTestTrait.groovy
+++ b/src/test/groovy/net/fabricmc/loom/test/util/ProjectTestTrait.groovy
@@ -59,7 +59,7 @@ trait ProjectTestTrait {
 			}
 
 			tempFile.parentFile.mkdirs()
-			tempFile << file.text
+			tempFile.bytes = file.bytes
 		}
 
 		// Disable the CI checks to ensure nothing is skipped