As we convert parts of the codebase to TypeScript, we will want a way to
track progress. This commit adds a dashboard which displays all of the
files that we wish to convert to TypeScript and which files we've
already converted.
The list of all possible files to convert is predetermined by walking
the dependency graph of each entrypoint the build system uses to compile
the extension (the files that the entrypoint imports, the files that the
imports import, etc). The list should not need to be regenerated, but
you can do it by running:
yarn ts-migration:enumerate
The dashboard is implemented as a separate React app. The CircleCI
configuration has been updated so that when a new commit is pushed, the
React app is built and stored in the CircleCI artifacts. When a PR is
merged, the built files will be pushed to a separate repo whose sole
purpose is to serve the dashboard via GitHub Pages (this is the same
way that the Storybook works). All of the app code and script to build
the app are self-contained under
`development/ts-migration-dashboard`. To build this app yourself, you
can run:
yarn ts-migration:dashboard:build
or if you want to build automatically as you change files, run:
yarn ts-migration:dashboard:watch
Then open the following file in your browser (there is no server
component):
development/ts-migration-dashboard/build/index.html
Finally, although you shouldn't have to do this, to manually deploy the
dashboard once built, you can run:
git remote add ts-migration-dashboard git@github.com:MetaMask/metamask-extension-ts-migration-dashboard.git
yarn ts-migration:dashboard:deploy
We would like to insert TypeScript into the ESLint configuration, and
because of the way that the current config is organized, that is not
easy to do.
Most files are assumed to be files that are suited for running in a
browser context. This isn't correct, as we should expect most files to
work in a Node context instead. This is because all browser-based files
will be run through a transpiler that is able to make use of
Node-specific variables anyway.
There are a couple of important ways we can categories files which our
ESLint config should be capable of handling well:
* Is the file a script or a module? In other words, does the file run
procedurally or is the file intended to be brought into an existing
file?
* If the file is a module, does it use the CommonJS syntax (`require()`)
or does it use the ES syntax (`import`/`export`)?
When we introduce TypeScript, this set of questions will become:
* Is the file a script or a module?
* If the file is a module, is it a JavaScript module or a TypeScript
module?
* If the file is a JavaScript module, does it use the CommonJS syntax
(`require()`) or does it use the ES syntax (`import`/`export`)?
To represent these divisions, this commit removes global rules — so now
all of the rules are kept in `overrides` for explicitness — and sets up
rules for CommonJS- and ES-module-compatible files that intentionally do
not overlap with each other. This way TypeScript (which has its own set
of rules independent from JavaScript and therefore shouldn't overlap
with the other rules either) can be easily added later.
Finally, this commit splits up the ESLint config into separate files and
adds documentation to each section. This way sets of rules which are
connected to a particular plugin (`jsdoc`, `@babel`, etc.) can be easily
understood instead of being obscured.
This PR adds one LavaMoat background script policy or each build type. It also renames the build system policy directory from `node` to `build-system` to make its purpose more clear. Each build type has the original `policy-override.json` for `main` builds. The `.prettierignore` file has been updated to match the locations of the new auto-generated policy files.
We need to maintain separate policies for each build type because each type will produce different bundles with different internal and external modules.
Co-authored-by: Mark Stacey <markjstacey@gmail.com>
Instead of using `eslint-plugin-json` for linting JSON files,
`prettier` is now used. `prettier` is capable of detecting and
correcting more problems than `eslint-plugin-json` can, such as
indentation.
All JSON files have been run through `prettier`. The changes are all
superficial.
