Scope the git diff worktree walk - #145
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diff({ paths }) filtered after statusMatrix had already walked the whole
worktree and handed every path to its map callback. Once a synced
node_modules is in the tree that walk dominates a diff that the caller
scoped to a handful of files.
Pass the requested paths to isomorphic-git's filepaths so the traversal
is pruned up front. filepaths uses the same "exact path or directory
prefix" rule as makePathFilter, so this is a traversal hint only: the
filter stays the authority on what is emitted and results are unchanged.
normalizeFilepaths returns undefined when the caller asked for no
scoping, or when a path normalizes to the repo root, so isomorphic-git's
own default of ['.'] stands rather than scoping to everything.
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The
diff()function now previously walked the entire file tree when thepathsargument was provided. Now it walks only the list applicable to the filter.To see the difference, take a repository with one source file and three thousand vendor files, change the source file, and diff just that directory: