feat: add --target flag to filter target files - #95
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npx snipsync --target "docs/develop/dotnet/**/*.mdx" When --target is set, only matching files are scanned and spliced. All origin repos are still downloaded and snippets extracted, but the splice phase (which dominates runtime at ~70% of total) only iterates over the filtered files. For a single file, this reduces runtime from ~77s to ~19s.
Duncanma
approved these changes
Jul 29, 2026
Covers the glob form, that only the splice step is narrowed, and that --clear accepts --target too. Records three behaviors that are easy to get wrong: the glob resolves from the working directory, it replaces `targets` rather than filtering it, and allowed_target_extensions still applies.
One test per behavior documented in the README: the glob narrows the splice, it can reach files outside the configured targets, allowed_target_extensions still applies on top of it, clear honors the filter, and omitting the filter still walks every target. Confirmed the assertions bite by disabling the filter branch in getTargetFilesInfos: four of the five fail. The fifth is the no-filter regression case, which passes either way by design.
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Summary
--target <glob>CLI flag to restrict which target files snipsync processesnpx snipsync --target "docs/develop/dotnet/**/*.mdx"globdependencyPerformance
The splice phase dominates runtime at ~70% of total time (iterating every snippet x every target file). Filtering to a single file reduces total runtime from ~77s to ~19s.
--targetsingle fileThe remaining ~19s is repo downloads + snippet extraction, which could be further optimized in a future PR.
Test plan
npx snipsync --target "docs/path/to/file.mdx"processes only that filenpx snipsync --target "docs/develop/dotnet/**/*.mdx"processes all matching filesnpx snipsync(no flag) processes all files as beforenpx snipsync --clearstill works