-T rust -t rust still excludes Rust files instead of honoring the later type selection #196

Summary

For conflicting -t and -T selections of the same file type, tgrep always gives exclusion precedence. ripgrep honors the later selection. Consequently, -T rust -t rust silently omits Rust files that ripgrep admits.

The same difference is visible in --files, which exits 0 even though its output is incomplete.

Reproduce

mkdir repro-type-order && cd repro-type-order
mkdir data
printf 'needle\n' > data/a.rs
printf 'needle\n' > data/a.txt

tgrep --no-index -T rust -t rust -l -- needle data
rg               -T rust -t rust -l -- needle data

tgrep --no-index --files -T rust -t rust data
rg               --files -T rust -t rust data

# Reverse-order control: both tools exclude Rust files
tgrep --no-index -t rust -T rust -l -- needle data
rg               -t rust -T rust -l -- needle data

The content-search cases reproduce with --no-index, an on-disk index, and tgrep serve --no-watch.

To repeat the indexed cases, run tgrep index data, remove --no-index, and keep the directory path data. For the server cases, start tgrep serve --no-watch data in another terminal and repeat those directory searches. --stats was used in the Windows harness to verify the selected backend, including (via server).

--files was separately verified in scan and local-index modes.

Environment

• tgrep 1.2.0, official Windows x86_64 release.
• Source inspected at release commit 3ba6ee02537281b68ee1366bb40df9f8b7cc54f0.
• Windows; test harness run with PowerShell 7.
• ripgrep 15.1.0 (af60c2de9d).
• Verified on 2026-10-12. The shell examples describe the same fixture bytes and arguments tested on Windows.

Cause

tgrep-core/src/filetypes.rs:167 checks the exclusion matcher first and returns false immediately when it matches. tgrep-cli/src/search.rs:2233 receives separate selected/excluded type lists, so it cannot resolve the conflicting selections using their original interleaving.

Possible fix

Preserve the ordering of -t and -T operations when constructing the filter. A later selection of a type should supersede an earlier exclusion of that same type, as in ripgrep.

A regression could cover both argument orders in content search and --files, across indexed and scanned paths.