# cctz を Homebrew, dnf, Nix, apt でインストール cctz のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。 ## インストール ```sh sudo av install brew:cctz ``` 追加のインストールコマンド: ### macOS - Homebrew (100%): ```sh brew install cctz ``` 証拠: local Homebrew formula metadata ### Linux - dnf (92%): ```sh sudo dnf install cctz ``` 証拠: Fedora Rawhide package metadata: cctz from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/07190dc5ae9f35ae73866675fed6d95fe6e8d9fe22c9d7cdf85862cb2ed24a4c-primary.xml.zst - Nix (92%): ```sh nix profile install nixpkgs#cctz ``` 証拠: nixpkgs package indexes: pkgs/by-name/cc/cctz/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Debian apt (92%): ```sh sudo apt install libcctz-dev ``` 証拠: Debian stable package indexes: libcctz-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz ## パッケージ情報 - **パッケージキー:** brew:cctz - **パッケージマネージャ:** Homebrew - **バージョン:** 2.5 - **ソース概要:** C++ library for translating between absolute and civil times - **ホームページ:** - **リポジトリ:** - **生成日時:** 2026-08-03T19:37:03+00:00 ## 実行可能ファイル - time_tool (エイリアス) ## インストール挙動 - Bottle: 利用不可 ## バージョンと鮮度 - ページ生成日: 2026-08-03 - マネージャ版: 2.5 ## プロジェクトの歴史と使われ方 CCTZ is Google's C++ date, civil-time, and time-zone library for converting between absolute time and human civil time using IANA time-zone data. It is packaged both as a library and, in Homebrew, with the time_tool example executable. ### 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++ , 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++ , 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 - - - - ## セキュリティノート library-like package without higher-risk signals. - **Geiger リスク:** グリーン / 低 - library-like package without higher-risk signals ## 他のパッケージマネージャ記録 - Debian apt - libcctz-dev - 2.4+dfsg1-2: normalized package name match | Debian stable package indexes: libcctz-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Library for computing dates, times and time zones, development files | https://github.com/google/cctz - Debian apt - libcctz-doc - 2.4+dfsg1-2: normalized package name match | Debian stable package indexes: libcctz-doc from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Library for computing dates, times and time zones, documentation | https://github.com/google/cctz - Debian apt - libcctz2.4 - 2.4+dfsg1-2: normalized package name match | Debian stable package indexes: libcctz2.4 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Library for computing dates, times and time zones, shared library | https://github.com/google/cctz - Nix - cctz: normalized package name match | nixpkgs package indexes: pkgs/by-name/cc/cctz/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - libcctz-dev - 2.3+dfsg1-5build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libcctz-dev from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Library for computing dates, times and time zones, development files | https://github.com/google/cctz - Ubuntu apt - libcctz-doc - 2.3+dfsg1-5build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libcctz-doc from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Library for computing dates, times and time zones, documentation | https://github.com/google/cctz - Ubuntu apt - libcctz2 - 2.3+dfsg1-5build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libcctz2 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Library for computing dates, times and time zones, shared library | https://github.com/google/cctz - dnf - cctz - 2.5-4.fc45: normalized package name match | Fedora Rawhide package metadata: cctz from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/07190dc5ae9f35ae73866675fed6d95fe6e8d9fe22c9d7cdf85862cb2ed24a4c-primary.xml.zst | Translating between absolute and civil times using time zone rules | https://github.com/google/cctz - dnf - cctz-devel - 2.5-4.fc45: normalized package name match | Fedora Rawhide package metadata: cctz-devel from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/07190dc5ae9f35ae73866675fed6d95fe6e8d9fe22c9d7cdf85862cb2ed24a4c-primary.xml.zst | Translating between absolute and civil times using time zone rules | https://github.com/google/cctz ## Combined YAML source View the package source record on GitHub. [combined/cctz.yml](https://github.com/mxcl/pkgdb/blob/main/combined/cctz.yml) ## ソース - pkg.so package database - Geiger risk classifier - curated package history - pkgdb category and tag curation - external package-manager database matches - cross-ecosystem install command graph