babel-cli in --watch mode doesn't delete output file when source file is deleted

[henbjo]

Bug Report

Current Behavior When I run babel-cli with the --watch flag, files that I delete from my src directory still remain present in the output directory.

Expected behavior/code Because babel-cli watches my src directory, I would expect it to detect deleted files and delete the corresponding output file as well.

Babel Configuration (.babelrc, package.json, cli command)

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": "> 0.25%, not dead",
        "modules": false
      }
    ]
  ]
}

Environment

• Babel version: v7.0.0
• Node/yarn version: Node 10.14.1/yarn 1.12.3
• OS: macOS 10.14.1
• Monorepo: no
• How you are using Babel: cli

Possible Solution Listen to unlink events when watching the source tree and delete the corresponding output files.

Additional context Issue 5636 already discusses this problem, and this comment suggests it should be the default behavior.

[babel-bot]

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