README.md

yFiles for HTML migration tool

Migrate outdated yFiles for HTML code to yFiles for HTML 2.6.

The source of this tool is available at GitHub.

Usage

1. Install the migration tool globally:

   npm install -g @yworks/migrate-yfiles-app

2. Migrate your project:

   migrate-yfiles-app --src=./src --dest=./src-migrated --from=1.3

The output of the tool includes code locations in a simple format that will be recognized by most IDEs (e.g. VS Code, Webstorm), so you can click on output lines to migrate the corresponding code manually.

Incremental Mode

The tool offers an incremental mode where it will not actually transform your files, but will only output messages that describe what has to be changed at which location. This allows you to migrate your app iteratively, until no such messages are printed anymore. The messages usually take the following form:

The thing 'oldThing' has been changed to 'newThing' in version <versionNumber>. [additional information here.]
  at <absolute path to file, including line and column numbers>

We recommend running the tool once in non-incremental mode to get the automatic code changes, and afterwards running it in incremental mode to migrate the things that could not be handled automatically.

Messages can also be suppressed by putting a comment with the content @migration-ignore above the line where the message occurs. This is useful if you are sure that the code is already correct.

Command Line Arguments

Required Arguments

-f	--from	The version of yFiles for HTML from which to migrate. Available options: 1.3, 1.4, 2.0, 2.1, 2.2, 2.3, 2.4
-s	--src	The input file/directory to be transformed.
-d	--dest	The destination directory where all transformed files will be written to. This has to be empty unless the --incremental or --force options are specified.

Optional Arguments

-i	--incremental	Run the migration tool in incremental mode.
-e	--extensions	Which file extensions to transform. Default: .js and .ts
	--ignore-pattern	Ignore files that match the provided glob expression (default: **/node_modules/**).
-l	--singleline	Write log messages in a single line instead of printing the source location to a second line.
-v	--verbose	Log verbose jscodeshift messages
	--force	Overwrite files in the destination directory.
-nc	--nocolor	Don't colorize the log messages.
	--version	Show the version number.
	--help	Show help.
-t	--transforms	Which transforms to apply.

Logging Debug Messages

The migration tool uses the npm debug module to log debugging information in individual transforms. To enable all debug messages, set the DEBUG environment variable to migrate-yfiles-app:*. This will output all migration tool debug messages. To restrict the debug output to a specific feature/transform, use the corresponding specifier, e.g. DEBUG=migrate-yfiles-app:toEs6Class.

VS Code Problem Matcher

Navigating possible problems detected by the migration tool can be facilitated using a problem matcher in VS Code. The messages are summarized by file in the problems panel, and the corresponding sections are highlighted in the source code:

To enable problem matching in VS Code, add a task with the matcher definition to your .vscode/tasks.json file:

{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "Run yFiles migration tool",
      "type": "shell",
      "command": "migrate-yfiles-app",
      "args": [
        "--src=app-src",
        "--dest=dest/",
        "--from=1.3",
        "--force",
        "--singleline" 
      ],
      "problemMatcher": {
        "fileLocation": ["absolute"],
        "pattern": {
          "regexp": "^(.*?):(\\d+):(\\d+)\\s-\\s(.*)$",
          "file": 1,
          "line": 2,
          "column": 3,
          "message": 4
        }
      },
      "presentation": {
        "clear": true,
        "showReuseMessage": false
      }
    }
  ]
}