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Implement a cache module with CacheConfig and Cache structs supporting
read/write (string and binary), atomic writes via temp+rename, TTL-based
expiration, and size-limited garbage collection. Wire the repo cache into
packagist.rs and resolver.rs for API response caching, and the files
cache into downloader.rs for dist archive caching. Implement the
clear-cache command with full clear and --gc modes. All existing call
sites pass None for backward compatibility.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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dependency logic
Add the `depends` (why) and `prohibits` (why-not) commands that query
the dependency graph to answer "which packages require X?" and "which
packages prevent version Y of X from being installed?" respectively.
Introduces the shared `dependency` module with package loading from
lock file or installed.json, forward/inverted dependency graph walking,
recursive traversal with cycle detection, and table/tree output formatters.
Adds `conflict` field to LockedPackage for conflict-based prohibition
detection, updating all struct literals across install, remove, require,
and update test helpers.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Add lock file generation pipeline that converts resolved packages into a
complete composer.lock structure. Extends PackagistVersion with 15
metadata fields (authors, license, autoload, etc.), implements BFS-based
dev package classification, platform requirements extraction, and
content-hash computation. Cleans up unused skip_serializing_if
attributes on the Deserialize-only PackagistVersion struct.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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downloader modules
Phase 1 infrastructure for the install command:
- constraint: Composer-compatible version parsing and constraint matching
(caret, tilde, wildcard, hyphen range, OR/AND combinators)
- lockfile: composer.lock read/write with content-hash computation
- installed: vendor/composer/installed.json registry (Composer 2.x format)
- downloader: dist archive download with SHA-1 verification and
zip/tar.gz extraction with top-level directory stripping
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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