The "scripts" portion of the build script has been refactored to pass
the "build target" throughout the file. The "build target" is the
target environment for the build, reflected by the command used to
start the build (e.g. "dev", "prod", "test", or "testDev").
Beforehand we derived the variables `devMode` and `testing` from this
build target, and passed these throughout the script. However, there is
a future change [1] that requires adding a new build target that acts
like "prod" in some ways but not others. It was easier to refactor to
pass through `buildTarget` directly than it was to add a _third_
boolean flag to indirectly represent the target.
The existence of the "testDev" target made it convenient to still have
the `testing` and `devMode` flag, so helper functions were added to
derive those values from the build target. I anticipate that these will
only be needed temporarily though. We will probably be able to get rid
of the `testDev` target and the related complexities when we start
adding more flags (like `--watch`[2] and `--minify`[3]) to the build
script directly.
[1]: https://github.com/MetaMask/metamask-extension/issues/15003
[2]: https://github.com/MetaMask/metamask-extension/issues/12767
[3]: https://github.com/MetaMask/metamask-extension/issues/12768
The build script now uses `yargs` rather than `minimist`. The CLI is
now better documented, and we have additional validation for each
option.
A patch for `yargs` was required because it would blow up on the line
`Error.captureStackTrace`. For some reason when running under LavaMoat,
that property did not exist.
Closes#12766
Mark Stacey