🐛 gitignore lines starting with / not parsed correctly

[abustany]

Environment information

CLI:
  Version:                      1.3.3
  Color support:                true

Platform:
  CPU Architecture:             x86_64
  OS:                           linux

Environment:
  BIOME_LOG_DIR:                unset
  NO_COLOR:                     unset
  TERM:                         "xterm-256color"
  JS_RUNTIME_VERSION:           "v20.9.0"
  JS_RUNTIME_NAME:              "node"
  NODE_PACKAGE_MANAGER:         "pnpm/8.10.2"

Biome Configuration:
  Status:                       Loaded successfully
  Formatter disabled:           false
  Linter disabled:              true
  Organize imports disabled:    false
  VCS disabled:                 false

Workspace:
  Open Documents:               0

What happened?

1. Setup a .gitignore file in a subfolder with an absolute path in it (see example below) and enable gitignore integration
2. Run biome format

biome.json

{
  "$schema": "https://biomejs.dev/schemas/1.3.3/schema.json",
  "formatter": {
    "enabled": true,
    "indentStyle": "space",
    "indentWidth": 2,
    "lineWidth": 120
  },
  "vcs": {
    "enabled": true,
    "clientKind": "git",
    "useIgnoreFile": true
  }
}

app/.gitignore

# The "/" here means that the pattern is "anchored" in /app, ie app/build is ignored but app/foo/build is not
/build

Expected result

Biome should ignore the file, but the file is not ignored.

Code of Conduct

• I agree to follow Biome's Code of Conduct

[sairion]

This is pretty annoying, make me to separately declare ignore config in each packages of monorepo

[malobre]

@sairion FYI, ignoring ./file should behave the same as ignoring /file. Just a temporary workaround.

[DanielNoord]

@ematipico I see in #1134 that support for this was reverted in #1249 but I don't see a new issue or new PR. Is there somewhere I can track support for this?

[ematipico]

No, there isn't

[DanielNoord]

Can we reopen this one?

[ematipico]

Can we reopen this one?

It's not a bug because we don't support nested .gitignore files. We attempted to do that and we failed. (As you noticed)

We will attempt to do that later once we will add more features to our CLI, but that's not in our high priority list at the moment. Feel free to open a discussion so it attracts upvotes

[DanielNoord]

Opened a discussion here: #3530

Although I must say this feels more like a bug than a feature request. I consider nested .gitignore files to be a core feature of git and therefore support for ignore files should probably also include it.