File Watchers

1. In the Settings dialog (Ctrl+Alt+S) , click File Watchers under Tools. The File Watchers page opens showing a list of File Watchers that are already configured in this project and in the IDE.

2. Click and choose the predefined template from which you want to create a File Watcher. The choice depends on the tool you are going to use. To use a tool that is not on the list, choose Custom. The New Watcher dialog opens.

3. In the Name field, type the name of the File Watcher. By default, GoLand suggests the name of the selected predefined template.

1. From the File type list, choose the expected type of input files. The File Watcher will consider only files of this type as subject for analyzing and processing. File types are recognised based on associations between file types and file extensions.

   By default, the field shows the file type in accordance with the chosen predefined template.

2. Select the Scope in which the File Watcher is applicable.

   Changes in these files will invoke the File Watcher either immediately or upon save or frame deactivation, depending on the status of the Auto-save edited files to trigger the watcher checkbox.

   Select one of the predefined scopes from the list. For a project-level File Watcher, you can also click to configure a custom scope in the Scopes dialog that opens.

   • All Places: all the scopes listed below.

   • Project Files: all the files within the project

   • Scratches and Consoles: all the scratches and consoles in the Files tool window (View | Tool Windows | Files).

   • Recently Viewed Files: all the files that were recently viewed in the editor.

   • Recently Changed Files: all the files that recently changed in the editor.

   • Module: all the files in the current module.

   • Current File: the file opened in the active editor tab.

   • All Changed Files: all changed files, that is, all files associated with all existing changelists.

   • Default Changelist: all the files associated with the changelist  Default.

   Alternatively, click and configure a custom scope in the Scopes dialog that opens.

   For more information, refer to Scopes.

1. In the Program field, specify the path to the executable file of the tool (.exe, .cmd, .bat, or other depending on the specific tool).

2. In the Arguments field, define the arguments to pass to the tool.

   Arguments are usually specified using macros, for example, $FileName$ or $FileNameWithoutExtension$, that will be replaced with the actual filenames.

   Type the macros manually or click and select the relevant pattern fom the list in the Macros dialog that opens.

3. In the Output paths to refresh field, specify the files where the tool stores its output: the resulting source code, source maps, and dependencies. Based on these settings, GoLand recognizes the files generated through compilation.

   Output paths are usually specified using macros. You can type them manually or click and select the relevant one from the list in the dialog that opens.

   To specify several macros, use colons : as separators, for example, $FileNameWithoutExtension$.css:$FileNameWithoutExtension$.css.map.

4. Expand the

   Working Directory and Environment Variables hidden area.

5. Define the environment variables. For example, specify the PATH variable for the tools that are required for starting the tool you are configuring but are not referenced in the path to it.

6. In the Working directory field, specify the directory to which the tool will be applied.

   Because the tool is always invoked in the context of a file, the default working directory is the directory of the current file. The default working directory is specified in all predefined templates with the $FileDir$ macro. To specify a custom working directory, type the path to it in the field, or click and select the directory in the Select Path dialog, or click and select the desired macro from the list in the Macros dialog.

1. Specify the events that will invoke the File Watcher:

   • To invoke the File Watcher as soon as any changes are made to the source code, select the Auto-save edited files to trigger the watcher checkbox.

     When the checkbox is cleared, the File Watcher starts upon save (File | Save All) or when you move the focus from GoLand (on frame deactivation).

   • By default, the File Watcher wakes up on any saved change, including the updates received from your version control system when you, for example, check out a branch. To ignore such changes and invoke the File Watcher only when you update your code in GoLand, clear the Trigger the watcher on external changes checkbox.

2. Specify whether you want the File Watcher to interact with the GoLand syntax parser:

   • When the Trigger watcher regardless of syntax errors checkbox is selected, the File Watcher start regardless of the syntactical correctness of a file. The File Watcher will start upon update, save, or frame deactivation, depending on the status of the Auto-save edited files to trigger the watcher checkbox.

   • When the Trigger watcher regardless of syntax errors checkbox is cleared, the File Watcher ignores all triggers in files that are syntactically invalid and starts only in error-free files.

3. Use the Create output file from stdout checkbox to specify how you want to generate the output file.

   • When the checkbox is selected, GoLand reads the native tool's output standard output stream (stdout) and generates the resulting files from it.

   • When the checkbox is cleared, the tool writes its output directly to the files specified in the Output paths to refresh field.

4. In the Show console list, choose when you want the File Watcher to open the console.

   • Always: with this option, the console always opens after the tool execution is completed.

   • On error: with this option, the console opens after the tool execution only when the Exit code is different from 0.

   • Never: choose this option to suppress opening the console at all.

• To enable or disable a File Watcher, open the Settings dialog (Ctrl+Alt+S) , go to Tools | File Watchers, and select or clear the checkbox next to it.

  When a File Watcher is enabled, it starts automatically as soon as a file of the selected type and in the selected scope is changed or saved, refer to Configuring advanced options.

  If an error occurs while a File Watcher is running, the File Watcher is automatically disabled. To restore the status, enable the File Watcher manually.

Automatically run file watchers on save

You can configure the IDE to run file watchers in modified files automatically when your changes are saved.

1. Press Ctrl+Alt+S to open settings and then select Tools | Actions on Save.

2. Enable the File Watcher option and apply the changes.