Andrew Kolos 8d3cca43b2

use root directory as the default for rootOverride in Cache.test constructor (#158201) ...

While doing some hacking on `Cache` in https://github.com/flutter/flutter/pull/158081, I noticed that [`Cache.test`](de93182753/packages/flutter_tools/lib/src/cache.dart (L139)) allows the caller to tell Cache to use some given directory as the flutter root (instead of depending on the static global [`Cache.flutterRoot`](4f3976a4f2/packages/flutter_tools/lib/src/cache.dart (L206))). This has a default value, `/cache`. However, `/cache` is an unintuitive name for the root directory of a Flutter installation.

This led to confusion when updating some tests. I wanted to create `/bin/cache/engine-dart-sdk.stamp` for tests, but in reality I needed to create `/cache/bin/cache/engine-dart-sdk.stamp`.

This PR changes this default to the current directory of the file system (which I'm guessing is `/` for all intents and purposes). 

<details>

<summary> Pre-launch checklist </summary> 

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2024-11-05 23:00:05 +00:00

..

src

use root directory as the default for rootOverride in Cache.test constructor (#158201)

2024-11-05 23:00:05 +00:00

executable.dart

[native assets] Rewrite install names for relocated native libraries (#153054)

2024-08-29 14:51:23 +00:00

runner.dart

Handle ProcessExceptions due to git missing on the host (#154445)

2024-09-09 20:47:05 +00:00