whereis: implement basic whereis utility#588
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Add initial whereis utility that locates binary, source, and manual files for a command. Supports -b, -s, -m, and -a options.
Add whereis to root Cargo.toml dependencies and feat_common_core. Add test module registration in tests/tests.rs.
Add test cases for whereis utility including basic functionality, non-existent program handling, and binary-only search.
Fix test_whereis_binary_only to not hardcode Unix path /usr/bin/ls. The test now checks for 'ls:' prefix without requiring specific path.
- Search man directories recursively with proper path patterns - Support compressed man pages (.gz, .bz2, .xz, .zst, .Z) - Return first match only to match GNU whereis output format - Default behavior now searches binary + source + man (no flags)
Add tests for: - -m flag (man pages search) - Multiple programs search - Default behavior verification
- Fix cargo fmt formatting issues - Add cfg(unix) guards for Unix-specific test assertions - Remove duplicate test functions
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Summary
whereisutility that locates binary, source, and manual files for a command-b(binaries),-s(source),-m(man pages), and-a(all) optionsuumainanduu_appstructureImplementation
PATHfor binary files/usr/srcand/usr/local/srcfor source files (.c,.cpp,.h,.rs, etc.)Tests
Closes #396