From 546391dab6173660acceba6404136e9411ce1388 Mon Sep 17 00:00:00 2001 From: Boris Kolpackov Date: Wed, 1 Feb 2023 11:42:31 +0200 Subject: Implement system package manager query and install support for Debian --- bpkg/system-package-manager-debian.hxx | 201 +++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 bpkg/system-package-manager-debian.hxx (limited to 'bpkg/system-package-manager-debian.hxx') diff --git a/bpkg/system-package-manager-debian.hxx b/bpkg/system-package-manager-debian.hxx new file mode 100644 index 0000000..9fb93c7 --- /dev/null +++ b/bpkg/system-package-manager-debian.hxx @@ -0,0 +1,201 @@ +// file : bpkg/system-package-manager-debian.hxx -*- C++ -*- +// license : MIT; see accompanying LICENSE file + +#ifndef BPKG_SYSTEM_PACKAGE_MANAGER_DEBIAN_HXX +#define BPKG_SYSTEM_PACKAGE_MANAGER_DEBIAN_HXX + +#include + +#include +#include + +#include + +namespace bpkg +{ + // The system package manager implementation for Debian and alike (Ubuntu, + // etc) using the APT frontend. + // + // NOTE: the below description is also reproduced in the bpkg manual. + // + // For background, a library in Debian is normally split up into several + // packages: the shared library package (e.g., libfoo1 where 1 is the ABI + // version), the development files package (e.g., libfoo-dev), the + // documentation files package (e.g., libfoo-doc), the debug symbols + // package (e.g., libfoo1-dbg), and the architecture-independent files + // (e.g., libfoo1-common). All the packages except -dev are optional + // and there is quite a bit of variability here. Here are a few examples: + // + // libz3-4 libz3-dev + // + // libssl1.1 libssl-dev libssl-doc + // libssl3 libssl-dev libssl-doc + // + // libcurl4 libcurl4-openssl-dev libcurl4-doc + // libcurl3-gnutls libcurl4-gnutls-dev libcurl4-doc (yes, 3 and 4) + // + // Based on that, it seems our best bet when trying to automatically map our + // library package name to Debian package names is to go for the -dev + // package first and figure out the shared library package from that based + // on the fact that the -dev package should have the == dependency on the + // shared library package with the same version and its name should normally + // start with the -dev package's stem. + // + // For executable packages there is normally no -dev packages but -dbg, + // -doc, and -common are plausible. + // + // The format of the debian-name (or alike) manifest value is a comma- + // separated list of one or more package groups: + // + // [, ...] + // + // Where each is the space-separated list of one or more + // package names: + // + // [ ...] + // + // All the packages in the group should be "package components" (for the + // lack of a better term) of the same "logical package", such as -dev, -doc, + // -common packages. They normally have the same version. + // + // The first group is called the main group and the first package in the + // group is called the main package. Note that all the groups are consumed + // (installed) but only the main group is produced (packaged). + // + // We allow/recommend specifying the -dev package instead of the main + // package for libraries (the bpkg package name starts with lib), seeing + // that we are capable of detecting the main package automatically. If the + // library name happens to end with -dev (which poses an ambiguity), then + // the -dev package should be specified explicitly as the second package to + // disambiguate this situation (if a non-library name happened to start with + // lib and end with -dev, well, you are out of luck, I guess). + // + // Note also that for now we treat all the packages from the non-main groups + // as extras but in the future we may decide to sort them out like the main + // group (see parse_name_value() for details). + // + // The Debian package version has the [:][-] form + // (see deb-version(5) for details). If no explicit mapping to the bpkg + // version is specified with the debian-to-downstream-version (or alike) + // manifest values or none match, then we fallback to using the + // part as the bpkg version. If explicit mapping is specified, then we match + // it against the [:] parts ignoring . + // + struct system_package_status_debian: system_package_status + { + string main; + string dev; + string doc; + string dbg; + string common; + strings extras; + + // The `apt-cache policy` output. + // + struct package_policy + { + string name; + string installed_version; // Empty if none. + string candidate_version; // Empty if none and no installed_version. + + explicit + package_policy (string n): name (move (n)) {} + }; + + vector package_policies; + size_t package_policies_main = 0; // Size of the main group. + + explicit + system_package_status_debian (string m, string d = {}) + : main (move (m)), dev (move (d)) + { + assert (!main.empty () || !dev.empty ()); + } + + system_package_status_debian () = default; + }; + + class system_package_manager_debian: public system_package_manager + { + public: + virtual optional + pkg_status (const package_name&, const available_packages*) override; + + virtual void + pkg_install (const vector&) override; + + public: + // Expects os_release::name_id to be "debian" or os_release::like_ids to + // contain "debian". + // + using system_package_manager::system_package_manager; + + // Implementation details exposed for testing (see definitions for + // documentation). + // + public: + using package_status = system_package_status_debian; + using package_policy = package_status::package_policy; + + void + apt_cache_policy (vector&, size_t = 0); + + string + apt_cache_show (const string&, const string&); + + void + apt_get_update (); + + void + apt_get_install (const strings&); + + pair + apt_get_common (const char*); + + static package_status + parse_name_value (const package_name&, const string&, bool, bool); + + static string + main_from_dev (const string&, const string&, const string&); + + // If simulate is not NULL, then instead of executing the actual apt-cache + // and apt-get commands simulate their execution: (1) for apt-cache by + // printing their command lines and reading the results from files + // specified in the below apt_cache_* maps and (2) for apt-get by printing + // their command lines and failing if requested. + // + // In the (1) case if the corresponding map entry does not exist or the + // path is empty, then act as if the specified package/version is + // unknown. If the path is special "-" then read from stdin. For apt-cache + // different post-fetch and (for policy) post-install results can be + // specified (if the result is not found in one of the later maps, the + // previous map is used as a fallback). Note that the keys in the + // apt_cache_policy_* maps are the package sets and the corresponding + // result file is expected to contain (or not) the results for all of + // them. See apt_cache_policy() and apt_cache_show() implementations for + // details on the expected results. + // + struct simulation + { + std::map apt_cache_policy_; + std::map apt_cache_policy_fetched_; + std::map apt_cache_policy_installed_; + + std::map, path> apt_cache_show_; + std::map, path> apt_cache_show_fetched_; + + bool apt_get_update_fail_ = false; + bool apt_get_install_fail_ = false; + }; + + const simulation* simulate_ = nullptr; + + protected: + bool fetched_ = false; // True if already fetched metadata. + bool installed_ = false; // True if already installed. + + std::map> status_cache_; + }; +} + +#endif // BPKG_SYSTEM_PACKAGE_MANAGER_DEBIAN_HXX -- cgit v1.1