Three related defects in how the watcher decides what counts as a change.
1. `git rev-parse --git-dir` walks UP the tree, so an ordinary folder that
merely sits under an unrelated repository answered yes. The watcher then
inherited that ancestor's dirty state -- permanently non-empty and about
entirely different files -- and reindexed on every poll forever. A
directory is now git-managed only if it carries its own .git (directory
or gitlink file) or the ancestor actually tracks something inside it, so
a real monorepo sub-package still qualifies while a scratch or ignored
folder does not.
2. `git status` reports the whole repository regardless of -C, so every
package in a monorepo reindexed whenever any sibling was edited. The
status call is now scoped with a `-- .` pathspec.
3. Porcelain paths are REPOSITORY-relative but were stat'ed against
root_path. For a project watched at the repository root the two coincide
and the bug is invisible; for a subdirectory project every stat missed,
silently degrading the dirty signature to text-only and losing the
size/mtime component that makes an edit to an already-dirty file
detectable. Paths now resolve through `rev-parse --show-cdup`.
--show-cdup rather than --show-toplevel because MSYS/Cygwin git returns a
translated absolute path from the latter that will not join onto the
native path we hold; a relative hop composes on every platform.
Distilled from #1001 by bethzyy, whose diagnosis identified all three.
Main independently fixed that PR's two headline problems (the unbounded
non-git file count, and per-poll churn via a dirty-state signature) while
it waited, and the watcher was rewritten onto a supervised argv-spawn
harness in between, so this is a reimplementation against the new code
rather than a rebase of theirs.
Both new tests are verified binding: reverting the classification guard
reddens the nested-directory test, and removing the pathspec reddens the
monorepo one, each without disturbing the other.
Addresses the remaining parts of #713, #841 and #937.
Co-authored-by: bethzyy <bethzyy@users.noreply.github.com>
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
