Filesystem API: Add directory support to `WP_Filesystem_Direct::move()`.

Introduces:
- New function: `wp_opcache_invalidate_directory()`, to recursively call `wp_opcache_invalidate()` after overwriting .php files.
- New function: `move_dir()`, similar to `copy_dir()` that uses `WP_Filesystem::move()` followed by `wp_opcache_invalidate_directory()`, and has a fallback to `copy_dir()`.

Props: costdev, afragen, peterwilsoncc, sergeybiryukov, ironprogrammer, flixos90, bronsonquick, mukesh27, azaozz.
Fixes #57375.
Built from https://develop.svn.wordpress.org/trunk@55204


git-svn-id: http://core.svn.wordpress.org/trunk@54737 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-filesystem-direct.php

@@ -316,7 +316,14 @@ class WP_Filesystem_Direct extends WP_Filesystem_Base {
 	}
 
 	/**
-	 * Moves a file.
+	 * Moves a file or directory.
+	 *
+	 * After moving files or directories, OPcache will need to be invalidated.
+	 *
+	 * If moving a directory fails, `copy_dir()` can be used for a recursive copy.
+	 *
+	 * Use `move_dir()` for moving directories with OPcache invalidation and a
+	 * fallback to `copy_dir()`.
 	 *
 	 * @since 2.5.0
 	 *
@@ -331,12 +338,18 @@ class WP_Filesystem_Direct extends WP_Filesystem_Base {
 			return false;
 		}
 
+		if ( $overwrite && $this->exists( $destination ) && ! $this->delete( $destination, true ) ) {
+			// Can't overwrite if the destination couldn't be deleted.
+			return false;
+		}
+
 		// Try using rename first. if that fails (for example, source is read only) try copy.
 		if ( @rename( $source, $destination ) ) {
 			return true;
 		}
 
-		if ( $this->copy( $source, $destination, $overwrite ) && $this->exists( $destination ) ) {
+		// Backward compatibility: Only fall back to `::copy()` for single files.
+		if ( $this->is_file( $source ) && $this->copy( $source, $destination, $overwrite ) && $this->exists( $destination ) ) {
 			$this->delete( $source );
 
 			return true;

wp-admin/includes/file.php

@@ -1946,6 +1946,75 @@ function copy_dir( $from, $to, $skip_list = array() ) {
 	return true;
 }
 
+/**
+ * Moves a directory from one location to another.
+ *
+ * Recursively invalidates OPcache on success.
+ *
+ * If the renaming failed, falls back to copy_dir().
+ *
+ * Assumes that WP_Filesystem() has already been called and setup.
+ *
+ * @since 6.2.0
+ *
+ * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
+ *
+ * @param string $from      Source directory.
+ * @param string $to        Destination directory.
+ * @param bool   $overwrite Optional. Whether to overwrite the destination directory if it exists.
+ *                          Default false.
+ * @return true|WP_Error True on success, WP_Error on failure.
+ */
+function move_dir( $from, $to, $overwrite = false ) {
+	global $wp_filesystem;
+
+	if ( trailingslashit( strtolower( $from ) ) === trailingslashit( strtolower( $to ) ) ) {
+		return new WP_Error(
+			'source_destination_same_move_dir',
+			__( 'The source and destination are the same.' )
+		);
+	}
+
+	if ( ! $overwrite && $wp_filesystem->exists( $to ) ) {
+		return new WP_Error( 'destination_already_exists_move_dir', __( 'The destination folder already exists.' ), $to );
+	}
+
+	if ( $wp_filesystem->move( $from, $to, $overwrite ) ) {
+		/*
+		 * When using an environment with shared folders,
+		 * there is a delay in updating the filesystem's cache.
+		 *
+		 * This is a known issue in environments with a VirtualBox provider.
+		 *
+		 * A 200ms delay gives time for the filesystem to update its cache,
+		 * prevents "Operation not permitted", and "No such file or directory" warnings.
+		 *
+		 * This delay is used in other projects, including Composer.
+		 * @link https://github.com/composer/composer/blob/2.5.1/src/Composer/Util/Platform.php#L228-L233
+		 */
+		usleep( 200000 );
+		wp_opcache_invalidate_directory( $to );
+
+		return true;
+	}
+
+	// Fall back to a recursive copy.
+	if ( ! $wp_filesystem->is_dir( $to ) ) {
+		if ( ! $wp_filesystem->mkdir( $to, FS_CHMOD_DIR ) ) {
+			return new WP_Error( 'mkdir_failed_move_dir', __( 'Could not create directory.' ), $to );
+		}
+	}
+
+	$result = copy_dir( $from, $to, array( basename( $to ) ) );
+
+	// Clear the source directory.
+	if ( true === $result ) {
+		$wp_filesystem->delete( $from, true );
+	}
+
+	return $result;
+}
+
 /**
  * Initializes and connects the WordPress Filesystem Abstraction classes.
  *
@@ -2557,3 +2626,65 @@ function wp_opcache_invalidate( $filepath, $force = false ) {
 
 	return false;
 }
+
+/**
+ * Attempts to clear the opcode cache for a directory of files.
+ *
+ * @since 6.2.0
+ *
+ * @see wp_opcache_invalidate()
+ * @link https://www.php.net/manual/en/function.opcache-invalidate.php
+ *
+ * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
+ *
+ * @param string $dir The path to the directory for which the opcode cache is to be cleared.
+ */
+function wp_opcache_invalidate_directory( $dir ) {
+	global $wp_filesystem;
+
+	if ( ! is_string( $dir ) || '' === trim( $dir ) ) {
+		if ( WP_DEBUG ) {
+			$error_message = sprintf(
+				/* translators: %s: The function name. */
+				__( '%s expects a non-empty string.' ),
+				'<code>wp_opcache_invalidate_directory()</code>'
+			);
+			// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_trigger_error
+			trigger_error( $error_message );
+		}
+		return;
+	}
+
+	$dirlist = $wp_filesystem->dirlist( $dir, false, true );
+
+	if ( empty( $dirlist ) ) {
+		return;
+	}
+
+	/*
+	 * Recursively invalidate opcache of files in a directory.
+	 *
+	 * WP_Filesystem_*::dirlist() returns an array of file and directory information.
+	 *
+	 * This does not include a path to the file or directory.
+	 * To invalidate files within sub-directories, recursion is needed
+	 * to prepend an absolute path containing the sub-directory's name.
+	 *
+	 * @param array  $dirlist Array of file/directory information from WP_Filesystem_Base::dirlist(),
+	 *                        with sub-directories represented as nested arrays.
+	 * @param string $path    Absolute path to the directory.
+	 */
+	$invalidate_directory = function( $dirlist, $path ) use ( &$invalidate_directory ) {
+		$path = trailingslashit( $path );
+
+		foreach ( $dirlist as $name => $details ) {
+			if ( 'f' === $details['type'] ) {
+				wp_opcache_invalidate( $path . $name, true );
+			} elseif ( is_array( $details['files'] ) && ! empty( $details['files'] ) ) {
+				$invalidate_directory( $details['files'], $path . $name );
+			}
+		}
+	};
+
+	$invalidate_directory( $dirlist, $dir );
+}

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55203';
+$wp_version = '6.2-alpha-55204';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.