Tests + correct command syntax

Working for zip
Not quite working for tar

The tar command is correct and works when I run it on the command line, but the tests are failing to exclude the file properly.

features/dist-archive.feature

@@ -149,6 +149,63 @@ Feature: Generate a distribution archive of a project
       | zip     | zip       | unzip     |
       | targz   | tar.gz    | tar -zxvf |
 
+  Scenario Outline: Ignores files specified with absolute path and not similarly named files
+    Given an empty directory
+    And a foo/.distignore file:
+      """
+      /maybe-ignore-me.txt
+      """
+    And a foo/test.php file:
+      """
+      <?php
+      echo 'Hello world;';
+      """
+    And a foo/test-dir/test.php file:
+      """
+      <?php
+      echo 'Hello world;';
+      """
+    And a foo/maybe-ignore-me.txt file:
+      """
+      Ignore
+      """
+    And a foo/test-dir/maybe-ignore-me.txt file:
+      """
+      Do not ignore
+      """
+    And a foo/test-dir/foo/maybe-ignore-me.txt file:
+      """
+      Do not ignore
+      """
+
+    When I run `wp dist-archive foo --format=<format> --plugin-dirname=<plugin-dirname>`
+    Then STDOUT should be:
+      """
+      Success: Created <plugin-dirname>.<extension>
+      """
+    And the <plugin-dirname>.<extension> file should exist
+
+    When I run `rm -rf foo`
+    Then the foo directory should not exist
+
+    When I run `rm -rf <plugin-dirname>`
+    Then the <plugin-dirname> directory should not exist
+
+    When I try `<extract> <plugin-dirname>.<extension>`
+    Then the <plugin-dirname> directory should exist
+    And the <plugin-dirname>/test.php file should exist
+    And the <plugin-dirname>/test-dir/test.php file should exist
+    And the <plugin-dirname>/maybe-ignore-me.txt file should not exist
+    And the <plugin-dirname>/test-dir/maybe-ignore-me.txt file should exist
+    And the <plugin-dirname>/test-dir/foo/maybe-ignore-me.txt file should exist
+
+    Examples:
+      | format  | extension | extract   | plugin-dirname |
+      | zip     | zip       | unzip     | foo            |
+      | targz   | tar.gz    | tar -zxvf | foo            |
+      | zip     | zip       | unzip     | bar            |
+      | targz   | tar.gz    | tar -zxvf | bar            |
+
   Scenario: Create directories automatically if requested
     Given a WP install
 

src/Dist_Archive_Command.php

@@ -78,7 +78,8 @@ public function __invoke( $args, $assoc_args ) {
 
 		$maybe_ignored_files = explode( PHP_EOL, file_get_contents( $dist_ignore_path ) );
 		$ignored_files       = array();
-		$archive_base        = basename( $path );
+		$source_base         = basename( $path );
+		$archive_base        = isset( $assoc_args['plugin-dirname'] ) ? rtrim( $assoc_args['plugin-dirname'], '/' ) : $source_base;
 		foreach ( $maybe_ignored_files as $file ) {
 			$file = trim( $file );
 			if ( 0 === strpos( $file, '#' ) || empty( $file ) ) {
@@ -87,10 +88,15 @@ public function __invoke( $args, $assoc_args ) {
 			if ( is_dir( $path . '/' . $file ) ) {
 				$file = rtrim( $file, '/' ) . '/*';
 			}
+			// If a path is tied to the root of the plugin using `/`, match exactly, otherwise match liberally.
 			if ( 'zip' === $assoc_args['format'] ) {
-				$ignored_files[] = '*/' . $file;
+				$ignored_files[] = ( 0 === strpos( $file, '/' ) )
+					? $archive_base . $file
+					: '*/' . $file;
 			} elseif ( 'targz' === $assoc_args['format'] ) {
-				$ignored_files[] = $file;
+				$ignored_files[] = ( 0 === strpos( $file, '/' ) )
+					? '^' . $archive_base . $file
+					: $file;
 			}
 		}
 
@@ -119,7 +125,7 @@ public function __invoke( $args, $assoc_args ) {
 			}
 		}
 
-		if ( isset( $assoc_args['plugin-dirname'] ) && rtrim( $assoc_args['plugin-dirname'], '/' ) !== $archive_base ) {
+		if ( $archive_base !== $source_base ) {
 			$plugin_dirname = rtrim( $assoc_args['plugin-dirname'], '/' );
 			$archive_base   = $plugin_dirname;
 			$tmp_dir        = sys_get_temp_dir() . DIRECTORY_SEPARATOR . $plugin_dirname . $version . '.' . time();