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Fixing empty files with grunt-typescript

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I recently faced the problem of an empty app.js file while working with gulp and the typescript compiler, which was wrapped using the grunt-typescript module.



Synopsis: Almost every third or fourth call, the concatenated app.js was empty at the time where other gulp-tasks where running. The dependencies where all fine, and the gulp-output showed that the typescript-Task has successfully completed before the dependent task was started. However, the file was empty a the moment the dependent task tried to do anything with it.


As you can see, the build:ts and even the build-task has completed without errors.

Solution: After hours of work (debugging grunt-plugins is a pain), I found a solution which helped to actually wait for the particular file to exist or has its contents written to it.

Its a simple task, which I have added to the chain of tasks immediately before the task which actually needs the missing file to exist
var fs = require("fs") // Load the filesystem …