When a Builder returns an output asset that contains irregular slashes (multiple slashes or leading/trailing slashes), then have them be removed from the file path before creating the output asset.
This fixes an edge case where `@vercel/next` could end up outputting a Serverless Function with a trailing slash (i.e. `en-US/`). Before this PR, that would be serialized to the filesystem at `en-US/.func`, but after this fix it's saved in the correct `en-US.func` directory.
When a build fails, store the serialized Error in the "builds.json" file under the "build" object of the Builder that failed.
Example:
```json
{
"//": "This file was generated by the `vercel build` command. It is not part of the Build Output API.",
"target": "preview",
"argv": [
"/usr/local/bin/node",
"/Users/nrajlich/Code/vercel/vercel/packages/cli/src/index.ts",
"build",
"--cwd",
"/Users/nrajlich/Downloads/vc-build-next-repro/"
],
"builds": [
{
"require": "@vercel/next",
"requirePath": "/Users/nrajlich/Code/vercel/vercel/packages/next/dist/index",
"apiVersion": 2,
"src": "package.json",
"use": "@vercel/next",
"config": {
"zeroConfig": true,
"framework": "nextjs"
},
"error": {
"name": "Error",
"message": "Command \"pnpm run build\" exited with 1",
"stack": "Error: Command \"pnpm run build\" exited with 1\n at ChildProcess.<anonymous> (/Users/nrajlich/Code/vercel/vercel/packages/build-utils/dist/index.js:20591:20)\n at ChildProcess.emit (node:events:527:28)\n at ChildProcess.emit (node:domain:475:12)\n at maybeClose (node:internal/child_process:1092:16)\n at Process.ChildProcess._handle.onexit (node:internal/child_process:302:5)",
"hideStackTrace": true,
"code": "BUILD_UTILS_SPAWN_1"
}
}
]
}
```
The `middlewarePath` property was not correctly stripping
the root directory setting from the value, causing Middleware
to not work correctly with Root Directory.
`vercel-sapper` is a case of a 3rd party Builder that does not export a `version` property. In this case, we should treat it the same as a `version: 2` Builder since its return value is compatible.
Allows to specify a string or array of paths/globs for when a root-level
Middleware should be invoked.
```javascript
export const config = {
matcher: ['/about/:path*', '/dashboard/:path*'],
}
```
Adds support for `config.middleware` property in `@vercel/node` to output an Edge Middleware (by including a catch-all route in the output).
Also updates the zero-config detection logic to schedule a build of root-level `middleware.js`/`middleware.ts` files with `@vercel/node` with this middleware option enabled.
`vc build` runs `vc pull` if no project settings are found locally. By default, `vc pull` pulls development environment variables, but we want either preview or production environment variables in the context of `vc build`. This PR adds a flag to the internal `vc pull` call to pull the correct environment variables.
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