zip

🚀 Features

• add example for memory allocation (#881)
• add method to README (#857)

🐛 Bug Fixes

• rewrite extra fields (#879)
• zip64 creation of exactly 4GB without large file should crash (#839)
• remove seek call and inline (#858)
• change directory attributes detection and set external attributes (#851)
• ignore zip info extra field on failure (#868)

🚜 Refactor

• change extra_data to extra_fields (#833)
• change zip64 parsing (#834)

⚙️ Miscellaneous Tasks

• tag PRs with size labels (#882)

<!-- 0 -->🚀 Features

• add example for memory allocation (#881)
• add method to README (#857)

<!-- 1 -->🐛 Bug Fixes

• rewrite extra fields (#879)
• zip64 creation of exactly 4GB without large file should crash (#839)
• remove seek call and inline (#858)
• change directory attributes detection and set external attributes (#851)
• ignore zip info extra field on failure (#868)

<!-- 2 -->🚜 Refactor

• change extra_data to extra_fields (#833)
• change zip64 parsing (#834)

<!-- 7 -->⚙️ Miscellaneous Tasks

• tag PRs with size labels (#882)

🚜 Refactor

• move types to zip format folder (#827)
• split read.rs file to read folder (#832)
• move tests outside of read.rs (#829)
• add doc and remove useless variables (#828)
• update some extra field (#821)
• Allow zip file with data descriptor using ZipReadOptions (#823)
• allow AES in zip file stream (#820)

<!-- 2 -->🚜 Refactor

• move types to zip format folder (#827)
• split read.rs file to read folder (#832)
• move tests outside of read.rs (#829)
• add doc and remove useless variables (#828)
• update some extra field (#821)
• Allow zip file with data descriptor using ZipReadOptions (#823)
• allow AES in zip file stream (#820)

🚀 Features

• Allow FileOptions to specify filename that may be non-UTF8 (#819)

🐛 Bug Fixes

• Zeroize derived_key when dropped, and suppress error details that may be sensitive (#803)

🚜 Refactor

• change vendor_version (#817)
• rewrite aes settings (#815)
• remove inner compression method from aes options (#814)
• don't store converted filenames; convert on demand instead; and don't use Arc since it only deduplicates when copying to same path in another archive (#807)
• Potential fixes for 5 code quality findings in src/aes.rs (#808)
• [breaking] remove deprecated method *_zip64_comment methods (#812)
• [breaking] Remove deprecated elements (#802)
• store the file_name_raw only as key (BREAKING) (#789)
• Remove fields from ZipFileData (#790)
• Remove useless compression level (#791)
• Add non-exhaustive to ExtraField enum (#793)
• remove macro export (#792)

<!-- 0 -->🚀 Features

• Allow FileOptions to specify filename that may be non-UTF8 (#819)

<!-- 1 -->🐛 Bug Fixes

• Zeroize derived_key when dropped, and suppress error details that may be sensitive (#803)

<!-- 2 -->🚜 Refactor

• change vendor_version (#817)
• rewrite aes settings (#815)
• remove inner compression method from aes options (#814)
• don't store converted filenames; convert on demand instead; and don't use Arc since it only deduplicates when copying to same path in another archive (#807)
• Potential fixes for 5 code quality findings in src/aes.rs (#808)
• [breaking] remove deprecated method *_zip64_comment methods (#812)
• [breaking] Remove deprecated elements (#802)
• store the file_name_raw only as key (BREAKING) (#789)
• Remove fields from ZipFileData (#790)
• Remove useless compression level (#791)
• Add non-exhaustive to ExtraField enum (#793)
• remove macro export (#792)

🚀 Features

• add compression not supported as enum error (#774)

🐛 Bug Fixes

• allow for [u8] as filename (#775)

🚜 Refactor

• mark ZipFlags as non-exhaustive and add test for HasZipMetadata (#777)
• use and simplify is_dir (#776)

<!-- 0 -->🚀 Features

• add compression not supported as enum error (#774)

<!-- 1 -->🐛 Bug Fixes

• allow for [u8] as filename (#775)

<!-- 2 -->🚜 Refactor

• mark ZipFlags as non-exhaustive and add test for HasZipMetadata (#777)
• use and simplify is_dir (#776)

🚜 Refactor

• change magic finder to stack buffer (#763)
• simplify extra field parsing (#764)

<!-- 2 -->🚜 Refactor

• change magic finder to stack buffer (#763)
• simplify extra field parsing (#764)

🐛 Bug Fixes

• remove zip64 comment and add zip64 extensible data sector (#747)

🚜 Refactor

• remove useless magic in struct (#730)
• change extra_field from Arc<Vec> to Arc<[u8]> (#741)

⚙️ Miscellaneous Tasks

• cleanup README (#758)

<!-- 1 -->🐛 Bug Fixes

• remove zip64 comment and add zip64 extensible data sector (#747)

<!-- 2 -->🚜 Refactor

• remove useless magic in struct (#730)
• change extra_field from Arc<Vec<u8>> to Arc<[u8]> (#741)

<!-- 7 -->⚙️ Miscellaneous Tasks

• cleanup README (#758)

🚀 Features

• add a check for building benches (#748)

🚜 Refactor

• split part of read.rs for code readability (#744)
• remove unused allow (#745)

⚡ Performance

• skip BufReader for Stored files in make_reader (#739)

⚙️ Miscellaneous Tasks

• move pull request template to correct folder (#749)

<!-- 0 -->🚀 Features

• add a check for building benches (#748)

<!-- 2 -->🚜 Refactor

• split part of read.rs for code readability (#744)
• remove unused allow (#745)

<!-- 4 -->⚡ Performance

• skip BufReader for Stored files in make_reader (#739)

<!-- 7 -->⚙️ Miscellaneous Tasks

• move pull request template to correct folder (#749)

🚜 Refactor

• use AexEncryption::new (#736)
• update tests to add big endian miri check (#735)

⚙️ Miscellaneous Tasks

• cleanup repository files (#743)

<!-- 2 -->🚜 Refactor

• use AexEncryption::new (#736)
• update tests to add big endian miri check (#735)

<!-- 7 -->⚙️ Miscellaneous Tasks

• cleanup repository files (#743)

🚀 Features

• add must_use (#727)
• improve and fix extended timestamp extra field parsing (#713)
• add crc32 ignore option (#710)
• path related code in single file (#712)

🐛 Bug Fixes

• Malformed ZIP64 file output (#715) (#717)

🚜 Refactor

• refactor some imports (#734)
• move code to distinct file (datetime, FixedSizeBlock) (#733)
• move stream code to src/read/stream.rs (#731)
• remove zip64 extra field update (#732)
• improve part of the code with clippy help (#725)
• simplify code for unicode extra field and improve error message (#724)
• reorganize code (#714)

Deps

• avoid pulling in zeroize_derive (#720)

<!-- 0 -->🚀 Features

• add must_use (#727)
• improve and fix extended timestamp extra field parsing (#713)
• add crc32 ignore option (#710)
• path related code in single file (#712)

<!-- 1 -->🐛 Bug Fixes

• Malformed ZIP64 file output (#715) (#717)

<!-- 2 -->🚜 Refactor

• refactor some imports (#734)
• move code to distinct file (datetime, FixedSizeBlock) (#733)
• move stream code to src/read/stream.rs (#731)
• remove zip64 extra field update (#732)
• improve part of the code with clippy help (#725)
• simplify code for unicode extra field and improve error message (#724)
• reorganize code (#714)

Deps

• avoid pulling in zeroize_derive (#720)

🚀 Features

• allow custom salt (#680)
• Support compressing bzip2 when feature bzip2-rs is enabled, since bzip2/bzip2-sys now supports it (#685)
• enforce clippy in CI (#674)

🐛 Bug Fixes

• zip64 central header (issue 617) (#629)
• allow aes password as bytes (#686)
• handle extra field padding (#682)

🚜 Refactor

• Simplify 2 type conversions in src/write.rs (#687)

⚡ Performance

• AI tweaks for string type conversions in src/types.rs (#670)

<!-- 0 -->🚀 Features

• allow custom salt (#680)
• Support compressing bzip2 when feature bzip2-rs is enabled, since bzip2/bzip2-sys now supports it (#685)
• enforce clippy in CI (#674)

<!-- 1 -->🐛 Bug Fixes

• zip64 central header (issue 617) (#629)
• allow aes password as bytes (#686)
• handle extra field padding (#682)

<!-- 2 -->🚜 Refactor

• Simplify 2 type conversions in src/write.rs (#687)

<!-- 4 -->⚡ Performance

• AI tweaks for string type conversions in src/types.rs (#670)

<!-- 0 -->🚀 Features

• (writer) Allow getting underlying writer of ZipWriter (#464)
• add system to FileOption, so byte-for-byte identical archives can be created across platforms (#660)

<!-- 1 -->🐛 Bug Fixes

• Bugs in extra-data length calculation in src/write.rs (#662)

<!-- 0 -->🚀 Features

• document zip flags as enum (#639)
• Migrate to Rust 2024 (#650)
• [breaking] Remove deprecated methods of DateTime (#597)

<!-- 0 -->🚀 Features

• Increase MSRV to 1.88 and update dependencies (#626)

<!-- 0 -->🚀 Features

• cleanup the benchmarks and Cargo.toml (#606)
• Add support for per-file comments (#543)

<!-- 1 -->🐛 Bug Fixes

• Document feature unreserved and make the mapping of extra fields public (#616)
• Return an error if abort_file() fails when exceeding non-large-file limit (#598)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Bump version to 7.3.0 (semver checks fail if it's still 7.3.0-pre1)

<!-- 1 -->🐛 Bug Fixes

• Reject empty ZipCrypto password when encrypting files (can still be used when decrypting)
• make zip crate safer and more readable (#536)

<!-- 4 -->⚡ Performance

• Optimizations for CP437 conversion (#559)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Trigger release 7.3.0-pre1 to reset cargo-semver-checks baseline

<!-- 0 -->🚀 Features

• add read_zipfile_from_stream_with_compressed_size (#70)
• Allow choosing bzip2 rust backend (#329)

<!-- 1 -->🐛 Bug Fixes

• Need to include zip64 extra field in central directory (fix #353) (#360)
• Fails to extract file which might or might not be malformed (#376) (#426)
• (aes) Allow AES encryption while streaming (#463)
• Default "platform" field in zip files should be set to the local platform, rather than always "Unix" (#470) (#471)

<!-- 2 -->🚜 Refactor

• Define cfg_if! and cfg_if_expr! internal macros (#438)

<!-- 4 -->⚡ Performance

• Change an assert to debug_assert when encrypting/decrypting AES, and eliminate a fallible operation (#521)
• eliminate a String clone per new file added to archive, and other related refactors (#522)

<!-- 0 -->🚀 Features

• display the underlying error in Display impl for ZipError (#483)
• Enable creation of ZipArchive without reparsing (#485)

<!-- 1 -->🐛 Bug Fixes

• Return InvalidPassword rather than panic when AES key is the wrong length (#457)
• bench with auto zip64 comment (#505)
• add condition for getrandom dependency (#504)
• (zipcrypto) Support streaming ZipCrypto encryption, don't store entire file in memory (#462)

<!-- 2 -->🚜 Refactor

• Clean up imports and move types (#461)
• Replace handwritten Ord and PartialOrd for DateTime (#484)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Lock lzma-rust2 to at least 0.15.5 (#491)

<!-- 9 -->⚠️ Breaking Changes

• Removed the following features: getrandom, hmac, pbkdf2, sha1, zeroize.
• Removed lzma-static and xz-static feature flags, which were deprecated synonyms of lzma and xz. (#405, #425)

<!-- 0 -->🚀 Features

• (SimpleFileOptions) const DEFAULT implementation (#474)
• ZipWriter set_auto_large_file() method to enable large-file data descriptor when necessary (#468)

<!-- 1 -->🐛 Bug Fixes

• print previous error when failing to search another cde (#460)
• cargo doc warnings (#472)
• Write ZIP64 data descriptors when large_file option is true (#467)
• Pin generic-array to an old version to work around https://github.com/RustCrypto/traits/issues/2036 until next RustCrypto & aes-crypto releases (#458)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Revert version bump so that release-plz will trigger
• expose more flate2 feature flags (#476)
• Next release will be 7.0.0
• release v6.0.0 (#442)

Deps

• Bump lzma-rust2 to v0.15 (#465)

<!-- 0 -->🚀 Features

• Add by_index_with_options(), which can be used to ignore encryption in a file's metadata (#439) and may be used for other file-specific overrides in the future.

<!-- 7 -->⚙️ Miscellaneous Tasks

• [breaking] FileOptions::add_extra_data is now generic and accepts any AsRef<[u8]>. (#435)

<!-- 1 -->🐛 Bug Fixes

• panic when reading empty extended-timestamp field (#404) (#422)
• Restore original file timestamp when unzipping with chrono (#46)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Configure Amazon Q rules (#421)

<!-- 0 -->🚀 Features

• Add legacy shrink/reduce/implode compression (#303)

<!-- 1 -->🐛 Bug Fixes

• AES metadata was not copied correctly in raw copy methods, which could corrupt the copied file. (#417)

<!-- 0 -->🚀 Features

• Implement by_path*() methods on ZipArchive (#382)

<!-- 1 -->🐛 Bug Fixes

• Fixes an issue introduced by the swap from lzma-rs to liblzma (#407)

<!-- 0 -->🚀 Features

• Allow to read zip files with unsupported extended timestamps (#400)

<!-- 1 -->🐛 Bug Fixes

• enable clamp_opt for ppmd and xz (#401)

<!-- 0 -->🚀 Features

• Allow reading ZIP files where the central directory comes before the files (#384) (#396)

<!-- 0 -->🚀 Features

• Add lzma-static and xz-static features that enable liblzma/static (#393)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Move deprecated annotations to fix a Clippy warning (#391)

<!-- 0 -->🚀 Features

• Add support for PPMd (#370)

<!-- 0 -->🚀 Features

• Write ZIP file to stream (#246)

<!-- 0 -->🚀 Features

• Add has_overlapping_files method

<!-- 1 -->🐛 Bug Fixes

• Allow extraction of Zip64 where "Version needed to extract" is higher than "Version made by" (#356)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Revert nt-time upgrade (would increase MSRV)
• Revert constant_time_eq update (would increase MSRV)
• Update fully-qualified names of liblzma imports

<!-- 1 -->🐛 Bug Fixes

• return correct offset in SeekableTake::seek (#342)
• When only zopfli is available, decompression of deflate should not be possible (#348)
• Specify flate2 dependency of the deflate-flate2 feature. (#345)

<!-- 7 -->⚙️ Miscellaneous Tasks

• drop unused crossbeam-utils dependency (#339)
• remove deflate-flate2 dependency on specific backend
• [breaking] Drop deprecated deflate-miniz feature flag (#351)

<!-- 1 -->🐛 Bug Fixes

• avoid scanning through all local file headers while opening an archive (#281)

• No documented changes.

<!-- 0 -->🚀 Features

• Add support for time::PrimitiveDateTime (#322)
• Add jiff integration (#323)

<!-- 1 -->🐛 Bug Fixes

• improve error message for duplicated file (#277)

<!-- 1 -->🐛 Bug Fixes

• deep_copy_file produced a mangled file header on big-endian platforms (#309)

<!-- 1 -->🐛 Bug Fixes

• type issue in test
• double as_ref().canonicalize()?
• CI failures
• Create directory for extraction if necessary (#314)

<!-- 0 -->🚀 Features

• ZipArchive::root_dir and ZipArchive::extract_unwrapped_root_dir (#304)

<!-- 1 -->🐛 Bug Fixes

• wasm build failure due to a missing use statement (#313)

<!-- 0 -->🚀 Features

• Add support for NTFS extra field (#279)

<!-- 1 -->🐛 Bug Fixes

• (test) Conditionalize a zip64 doctest (#308)
• fix failing tests, remove symlink loop check
• Canonicalize output path to avoid false negatives
• Symlink handling in stream extraction
• Canonicalize output paths and symlink targets, and ensure they descend from the destination (CVE-2025-29787)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Fix clippy and cargo fmt warnings (#310)

<!-- 2 -->🚜 Refactor

• Change the inner structure of DateTime (#267)

<!-- 7 -->⚙️ Miscellaneous Tasks

• cargo fix --edition

<!-- 1 -->🐛 Bug Fixes

• rewrite the EOCD/EOCD64 detection to fix extreme performance regression (#247)

<!-- 1 -->🐛 Bug Fixes

• remove executable bit (#238)
• (lzma) fixed panic in case of invalid lzma stream (#259)
• resolve new clippy warnings on nightly (#262)
• resolve clippy warning in nightly (#252)

<!-- 4 -->⚡ Performance

• Faster cde rejection (#255)

<!-- 0 -->🚀 Features

• Expose ZipArchive::central_directory_start (#232)

<!-- 1 -->🐛 Bug Fixes

• (#33) Rare combination of settings could lead to writing a corrupt archive with overlength extra data, and data_start locations when reading the archive back were also wrong (#221)

<!-- 2 -->🚜 Refactor

• Eliminate some magic numbers and unnecessary path prefixes (#225)

<!-- 2 -->🚜 Refactor

• change invalid_state() return type to io::Result<T>

<!-- 1 -->🐛 Bug Fixes

• fix(#215): Upgrade to deflate64 0.1.9
• Panic when reading a file truncated in the middle of an XZ block header
• Some archives with over u16::MAX files were handled incorrectly or slowly (#189)
• Check number of files when deciding whether a CDE is the real one
• Could still select a fake CDE over a real one in some cases
• May have to consider multiple CDEs before filtering for validity
• We now keep searching for a real CDE header after read an invalid one from the file comment
• Always search for data start when opening an archive for append, and reject the header if data appears to start after central directory
• deep_copy_file no longer allows overwriting an existing file, to match the behavior of shallow_copy_file
• File start position was wrong when extra data was present
• Abort file if central extra data is too large
• Overflow panic when central directory extra data is too large
• ZIP64 header was being written twice when copying a file
• ZIP64 header was being written to central header twice
• Start position was incorrect when file had no extra data
• Allow all reserved headers we can create
• Fix a bug where alignment padding interacts with other extra-data fields
• Fix bugs involving alignment padding and Unicode extra fields
• Incorrect header when adding AES-encrypted files
• Parse the extra field and reject it if invalid
• Incorrect behavior following a rare combination of merge_archive, abort_file and deep_copy_file. As well, we now return an error when a file is being copied to itself.
• path_to_string now properly handles the case of an empty path
• Implement Debug for ZipWriter even when it's not implemented for the inner writer's type
• Fix an issue where the central directory could be incorrectly detected
• finish_into_readable() would corrupt the archive if the central directory had moved

<!-- 2 -->🚜 Refactor

• Verify with debug assertions that no FixedSizeBlock expects a multi-byte alignment (#198)
• Use new do_or_abort_file method

<!-- 4 -->⚡ Performance

• Speed up CRC when encrypting small files
• Limit the number of extra fields
• Refactor extra-data validation
• Store extra data in plain vectors until after validation
• Only build one IndexMap after choosing among the possible valid headers
• Simplify validation of empty extra-data fields
• Validate automatic extra-data fields only once, even if several are present
• Remove redundant validate_extra_data() call
• Skip searching for the ZIP32 header if a valid ZIP64 header is present (#189)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Fix a bug introduced by c934c824
• Fix a failing unit test
• Fix build errors on older Rust versions
• Fix build
• Fix another fuzz failure
• Switch to ok_or_abort_file, and inline when that fails borrow checker
• Switch to ok_or_abort_file, and inline when that fails borrow checker
• Fix a build error
• Fix boxed_local warning (can borrow instead)
• Partial debug
• Fix more errors when parsing multiple extra fields
• Fix an error when decoding AES header
• Fix an error caused by not allowing 0xa11e field
• Bug fix: crypto_header was being counted toward extra_data_end
• Bug fix: revert a change where crypto_header was incorrectly treated as an extra field
• Fix a bug where a modulo of 0 was used
• Fix a bug when ZipCrypto, alignment and a custom header are used
• Fix a bug when both ZipCrypto and alignment are used
• Fix another bug: header_end vs extra_data_end
• Fix use of a stale value in a debug_assert_eq!
• Fix: may still get an incorrect size if opening an invalid file for append
• Fix: may need the absolute start as tiebreaker to ensure deterministic behavior

<!-- 1 -->🐛 Bug Fixes

• Some date/time filters were previously unreliable (i.e. later-pass filters had no earliest-pass or latest-fail, and vice-versa)
• Decode Zip-Info UTF8 name and comment fields (#159)

<!-- 2 -->🚜 Refactor

• Return extended timestamp fields copied rather than borrowed (#183)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Fix a new Clippy warning
• Fix a bug and inline deserialize for safety
• Add check for wrong-length blocks, and incorporate fixed-size requirement into the trait name
• Fix a fuzz failure by using checked_sub
• Add feature gate for new unit test

<!-- 1 -->🐛 Bug Fixes

• Derive Debug for ZipWriter
• lower default version to 4.5 and use the version-needed-to-extract where feasible.

<!-- 2 -->🚜 Refactor

• use a MIN_VERSION constant

<!-- 7 -->⚙️ Miscellaneous Tasks

• Bug fixes for debug implementation
• Bug fixes for debug implementation
• Update unit tests
• Remove unused import

<!-- 0 -->🚀 Features

• Support mutual conversion between DateTime and MS-DOS pair

<!-- 1 -->🐛 Bug Fixes

• version-needed-to-extract was incorrect in central header, and version-made-by could be lower than that (#100)
• version-needed-to-extract was incorrect in central header, and version-made-by could be lower than that (#100)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Another tweak to ensure version_needed is applied
• Tweaks to make version_needed and version_made_by work with recently-merged changes

<!-- 0 -->🚀 Features

• Add fmt::Display for DateTime
• Implement more traits for DateTime

<!-- 2 -->🚜 Refactor

• Change type of last_modified_time to Option<DateTime>
• [breaking] Rename from_msdos to from_msdos_unchecked, make it unsafe, and add try_from_msdos (#145)

<!-- 7 -->⚙️ Miscellaneous Tasks

• Continue to accept archives with invalid DateTime, and use now_utc() as default only when writing, not reading

<!-- 2 -->🚜 Refactor

• Make deflate enable both default implementations
• Merge the hidden deflate-flate2 flag into the public one
• Rename _deflate-non-zopfli to _deflate-flate2
• Reject encrypted and using_data_descriptor files slightly faster in read_zipfile_from_stream
• Convert impl TryInto<NaiveDateTime> for DateTime to impl TryFrom<DateTime> for NaiveDateTime (#136)

<!-- 4 -->⚡ Performance

• Change default compression implementation to flate2/zlib-ng

<!-- 7 -->⚙️ Miscellaneous Tasks

• chore(#132): Attribution for some copied test data
• chore(#133): chmod -x src/result.rs

<!-- 0 -->🚀 Features

• Add is_symlink method

<!-- 1 -->🐛 Bug Fixes

• Extract symlinks into symlinks on Unix and Windows, and fix a bug that affected making directories writable on MacOS

<!-- 2 -->🚜 Refactor

• Eliminate deprecation warning when --all-features implicitly enables the deprecated feature
• Check if archive contains a symlink's target, without borrowing both at the same time
• Eliminate a clone that's no longer necessary
• is_dir only needs to look at the filename
• Remove unnecessary #[cfg] attributes

<!-- 7 -->⚙️ Miscellaneous Tasks

• Fix borrow-of-moved-value
• Box<str> doesn't directly convert to PathBuf, so convert back to String first
• partial revert - only &str has chars(), but Box<str> should auto-deref
• contains_key needs a Box<str>, so generify is_dir to accept one
• Add missing ZipFileData::is_dir() method
• Fix another Windows-specific error
• More bug fixes for Windows-specific symlink code
• More bug fixes for Windows-specific symlink code
• Bug fix: variable name change
• Bug fix: need both internal and output path to determine whether to symlink_dir
• Another bug fix
• Fix another error-type conversion error
• Fix error-type conversion on Windows
• Fix conditionally-unused import
• Fix continued issues, and factor out the Vec<u8>-to-OsString conversion (cc: #125)
• Fix CI failure involving conversion to OsString for symlinks (see my comments on #125)
• Move path join into platform-independent code

<!-- 1 -->🐛 Bug Fixes

• Remove a window when an extracted directory might be unexpectedly listable and/or cdable by non-owners
• Extract directory contents on Unix even if the directory doesn't have write permission (https://github.com/zip-rs/zip-old/issues/423)

<!-- 7 -->⚙️ Miscellaneous Tasks

• More conditionally-unused imports

<!-- 1 -->🐛 Bug Fixes

• Failed to clear "writing_raw" before finishing a symlink, leading to dropped extra fields

<!-- 4 -->⚡ Performance

• Use boxed slice for archive comment, since it can't be concatenated
• Optimize for the fact that false signatures can't overlap with real ones

<!-- 1 -->🐛 Bug Fixes

• Prevent panic when trying to read a file with an unsupported compression method
• Prevent panic after reading an invalid LZMA file
• Make Stored the default compression method if Deflated isn't available, so that zip files are readable by as much software as possible
• version_needed was wrong when e.g. cfg(bzip2) but current file wasn't bzip2 (#100)
• file paths shouldn't start with slashes (#102)

<!-- 2 -->🚜 Refactor

• Overhaul impl Arbitrary for FileOptions
• Remove unused atomic module

<!-- 0 -->🚀 Features

• Add method decompressed_size() so non-recursive ZIP bombs can be detected

<!-- 2 -->🚜 Refactor

• Make ZipWriter::finish() consume the ZipWriter

<!-- 7 -->⚙️ Miscellaneous Tasks

• Use panic! rather than abort to ensure the fuzz harness can process the failure
• Update fuzz_write to use replace_with
• Remove a drop that can no longer be explicit
• Add #![allow(unexpected_cfgs)] in nightly

<!-- 1 -->🐛 Bug Fixes

• Build was failing with bzip2 enabled
• use is_dir in more places where Windows paths might be handled incorrectly

<!-- 4 -->⚡ Performance

• Quick filter for paths that contain "/../" or "/./" or start with "./" or "../"
• Fast handling for separator-free paths
• Speed up logic if main separator isn't '/'
• Drop normalized_components slightly sooner when not using it
• Speed up path_to_string in cases where the path is already in the proper format

<!-- 7 -->⚙️ Miscellaneous Tasks

• Refactor: can short-circuit handling of paths that start with MAIN_SEPARATOR, no matter what MAIN_SEPARATOR is
• Bug fix: non-canonical path detection when MAIN_SEPARATOR is not slash or occurs twice in a row
• Bug fix: must recreate if . or .. is a path element
• Bug fix

<!-- 9 -->◀️ Revert

• #58 (partial): bzip2-rs can't replace bzip2 because it's decompress-only

<!-- 1 -->🐛 Bug Fixes

• Rare bug where find_and_parse would give up prematurely on detecting a false end-of-CDR header

<!-- 1 -->🐛 Bug Fixes

• Alignment was previously handled incorrectly (#33)

<!-- 2 -->🚜 Refactor

• deprecate deflate-miniz feature since it's now equivalent to deflate (#35)