Super naive patcher. One command to copy a package folder from node_modules to ./patches. Patch the package. Another command to destructively copy all the patches in ./patches to node_modules.
Let's use lodash as an example.
npm i -D patcheernpm i lodash axiosnpx patcheer copy lodash- Tweak anything in
./patches/lodash npx patcheer copy axios- Tweak anything in
./patches/axios npx patcheer apply
To have it automatically apply patches after you run npm install on a project, just add this to your package.json scripts.
"postinstall": "npx patcheer apply"
If you're trying to build with Yarn or Bun, you'll need to add postinstall-postinstall to your dev dependencies.