cctz を Homebrew でインストール

プロジェクトリンク

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コマンドとエイリアス

• time_tool

プロジェクトの歴史

The official repository was created in 2015. The README says CCTZ contains a Civil-Time Library and a Time-Zone Library that cooperate with C++ <chrono>, giving programmers tools for date, time, and time-zone work.

CCTZ had a v1.0 release in March 2016 and a v2.0 release in April 2016, followed by v2.1 in 2017, v2.2 in 2018, v2.3 in 2019, v2.4 in 2024, and v2.5 in 2025.

採用の歴史

The README documents Bazel as the preferred build system while also supporting Make and CMake. The input package facts list Homebrew, Debian/Ubuntu libcctz-dev, Fedora/DNF, and Nix packages, showing adoption as a reusable C++ library rather than only as an application.

使われ方

CCTZ is used by C++ programs that need correct civil-date arithmetic and conversion between time zones and absolute time points. The README points users to cctz/civil_time.h, cctz/time_zone.h, examples, Bazel, CMake, and system-installed IANA zoneinfo data.

パッケージ好きにとっての重要性

CCTZ is package-nerd significant because time-zone handling is notoriously edge-case heavy, and this library packages a focused C++ solution around IANA data before broad standard-library time-zone support was common in deployed toolchains.

タイムライン

• 2015: Official GitHub repository created.
• 2016: v1.0 and v2.0 releases published.
• 2019: v2.3 release published.
• 2024: v2.4 release published.
• 2025: v2.5 release published.

Related projects

• The README references C++ <chrono>, the IANA time-zone database, Bazel, GoogleTest, and CMake.
• The README also links older ISO C++ proposals for standardizing civil-time and time-zone libraries.

ソース

• https://api.github.com/repos/google/cctz
• https://github.com/google/cctz
• https://github.com/google/cctz#readme
• https://formulae.brew.sh/api/formula/cctz.json