Improve matching in DockerfileCOPYParentsEmulator

Fixes #134

Author: AB-xdev

CHANGELOG.md

@@ -1,9 +1,13 @@
+# 2.0.1
+* Improve matching in ``DockerfileCOPYParentsEmulator`` #134
+  * Now should properly handle ``./``
+
 # 2.0.0
 * Changed ignore backend to utilize [JGit](https://github.com/eclipse-jgit/jgit) 
     * This should now behave exactly like a ``.gitignore``
     * Overall performance should be a lot faster
 * Make it possible to modify transferred files
-* Provide an option to emulate [``COPY --parents``](https://docs.docker.com/reference/dockerfile/#copy---parents) (which is currently not supported by Docker out of the box)
+* Provide an option to emulate [``COPY --parents``](https://docs.docker.com/reference/dockerfile/#copy---parents) using ``DockerfileCOPYParentsEmulator`` (which is currently not supported by Docker out of the box)
     * This option is required to utilize Docker's cache properly
     ```docker
     # syntax=docker/dockerfile:1-labs

testcontainers-advanced-imagebuilder/src/main/java/software/xdev/testcontainers/imagebuilder/compat/DockerfileCOPYParentsEmulator.java

@@ -18,9 +18,11 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.regex.Pattern;
 import java.util.stream.Stream;
 
-import software.xdev.testcontainers.imagebuilder.glob.GlobMatcher;
+import software.xdev.testcontainers.imagebuilder.jgit.errors.InvalidPatternException;
+import software.xdev.testcontainers.imagebuilder.jgit.ignore.internal.Strings;
 import software.xdev.testcontainers.imagebuilder.transfer.DockerFileLineModifier;
 
 
@@ -118,9 +120,9 @@ protected Stream<String> handleLine(final String line, final Set<String> relativ
 		return Stream.of(args)
 			.limit((long)args.length - (isLastArg ? 1 : 0))
 			.flatMap(source -> {
-				if(!source.contains("*") && !source.contains("/"))
+				if(!source.contains("*"))
 				{
-					return Stream.of(Map.entry(source, targetPathFinal));
+					return Stream.of(Map.entry(source, targetPathFinalForRelative + removeRelativeStart(source)));
 				}
 
 				final GlobMatcher matcher = new GlobMatcher(source);
@@ -133,4 +135,38 @@ protected Stream<String> handleLine(final String line, final Set<String> relativ
 				+ (!lineAfterArgsFinal.isEmpty() ? " " + lineAfterArgsFinal : "")
 				+ " " + e.getValue());
 	}
+	
+	protected static String removeRelativeStart(final String path)
+	{
+		return path.startsWith("./") ? path.substring(2) : path;
+	}
+	
+	public static class GlobMatcher
+	{
+		protected final Pattern pattern;
+		
+		public GlobMatcher(final String pattern)
+		{
+			try
+			{
+				this.pattern = Pattern.compile("\\/?" + Strings.convertGlob(removeRelativeStart(pattern)));
+			}
+			catch(final InvalidPatternException e)
+			{
+				throw new IllegalArgumentException(e);
+			}
+		}
+		
+		@SuppressWarnings("checkstyle:FinalParameters")
+		protected String correctPathForMatching(String path)
+		{
+			path = removeRelativeStart(path);
+			return path.startsWith("/") ? path : ("/" + path);
+		}
+		
+		public boolean matches(final String path)
+		{
+			return this.pattern.matcher(this.correctPathForMatching(path)).matches();
+		}
+	}
 }

testcontainers-advanced-imagebuilder/src/main/java/software/xdev/testcontainers/imagebuilder/glob/GlobMatcher.java

@@ -33,29 +33,39 @@ void simpleCheck()
 				"FROM alpine:3",
 				"COPY --parents mvnw .mvn/** --abc ./",
 				"COPY --parents **/pom.xml ./",
-				"COPY --parents abc/def.txt ./"
+				"COPY --parents abc/def.txt ./",
+				"COPY --parents ./d/e/** ./",
+				"COPY ./d/e/** ./", // Keep original
+				"COPY --parents ./it/mvnw ./it/.mvn/** ./xx"
 			), Set.of(
-				".mvn/wrapper/maven-wrapper.properties",
 				"mvnw",
+				".mvn/wrapper/maven-wrapper.properties",
 				"Dockerfile",
 				"pom.xml",
 				"a/pom.xml",
 				"a/b/pom.xml",
 				"a/b/c/pom.xml",
 				"abc/def.txt",
-				"ignoreme.txt"
+				"ignoreme.txt",
+				"d/e/example.txt",
+				"it/mvnw",
+				"it/.mvn/wrapper/maven-wrapper.properties"
 			));
 		Assertions.assertIterableEquals(
 			List.of(
 				"# syntax=docker/dockerfile:1-labs",
 				"FROM alpine:3",
-				"COPY mvnw --abc ./",
+				"COPY mvnw --abc ./mvnw",
 				"COPY .mvn/wrapper/maven-wrapper.properties --abc ./.mvn/wrapper/maven-wrapper.properties",
 				"COPY a/b/c/pom.xml ./a/b/c/pom.xml",
 				"COPY a/b/pom.xml ./a/b/pom.xml",
 				"COPY a/pom.xml ./a/pom.xml",
 				"COPY pom.xml ./pom.xml",
-				"COPY abc/def.txt ./abc/def.txt"
+				"COPY abc/def.txt ./abc/def.txt",
+				"COPY d/e/example.txt ./d/e/example.txt",
+				"COPY ./d/e/** ./", // Keep original
+				"COPY ./it/mvnw ./xx/it/mvnw",
+				"COPY it/.mvn/wrapper/maven-wrapper.properties ./xx/it/.mvn/wrapper/maven-wrapper.properties"
 			),
 			lines);
 	}