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Diffstat (limited to 'bpkg/system-package-manager.cxx')
| -rw-r--r-- | bpkg/system-package-manager.cxx | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/bpkg/system-package-manager.cxx b/bpkg/system-package-manager.cxx new file mode 100644 index 0000000..9f5dad0 --- /dev/null +++ b/bpkg/system-package-manager.cxx @@ -0,0 +1,454 @@ +// file : bpkg/system-package-manager.cxx -*- C++ -*- +// license : MIT; see accompanying LICENSE file + +#include <bpkg/system-package-manager.hxx> + +#include <sstream> + +#include <libbutl/regex.hxx> +#include <libbutl/semantic-version.hxx> + +#include <bpkg/package.hxx> +#include <bpkg/package-odb.hxx> +#include <bpkg/database.hxx> +#include <bpkg/diagnostics.hxx> + +#include <bpkg/system-package-manager-debian.hxx> + +using namespace std; +using namespace butl; + +namespace bpkg +{ + system_package_manager:: + ~system_package_manager () + { + // vtable + } + + unique_ptr<system_package_manager> + make_system_package_manager (const common_options& co, + const target_triplet& host, + bool install, + bool fetch, + bool yes, + const string& sudo, + const string& name) + { + optional<bool> progress (co.progress () ? true : + co.no_progress () ? false : + optional<bool> ()); + + unique_ptr<system_package_manager> r; + + if (optional<os_release> osr = host_os_release (host)) + { + auto is_or_like = [&osr] (const char* id) + { + return (osr->name_id == id || + find_if (osr->like_ids.begin (), osr->like_ids.end (), + [id] (const string& n) + { + return n == id; + }) != osr->like_ids.end ()); + }; + + if (host.class_ == "linux") + { + if (is_or_like ("debian") || + is_or_like ("ubuntu")) + { + if (!name.empty () && name != "debian") + fail << "unsupported package manager '" << name << "' for " + << osr->name_id << " host"; + + // If we recognized this as Debian-like in an ad hoc manner, then + // add debian to like_ids. + // + if (osr->name_id != "debian" && !is_or_like ("debian")) + osr->like_ids.push_back ("debian"); + + r.reset (new system_package_manager_debian ( + move (*osr), host, install, fetch, progress, yes, sudo)); + } + } + } + + if (r == nullptr) + { + if (!name.empty ()) + fail << "unsupported package manager '" << name << "' for host " + << host; + } + + return r; + } + + // Return the version id parsed as a semantic version if it is not empty and + // the "0" semantic version otherwise. Issue diagnostics and fail on parsing + // errors. + // + // Note: the name_id argument is only used for diagnostics. + // + static inline semantic_version + parse_version_id (const string& version_id, const string& name_id) + { + if (version_id.empty ()) + return semantic_version (0, 0, 0); + + try + { + return semantic_version (version_id, semantic_version::allow_omit_minor); + } + catch (const invalid_argument& e) + { + fail << "invalid version '" << version_id << "' for " << name_id + << " host: " << e << endf; + } + } + + // Parse the <distribution> component of the specified <distribution>-* + // value into the distribution name and version (return as "0" if not + // present). Issue diagnostics and fail on parsing errors. + // + // Note: the value_name, ap, and af arguments are only used for diagnostics. + // + static pair<string, semantic_version> + parse_distribution (string&& d, + const string& value_name, + const shared_ptr<available_package>& ap, + const lazy_shared_ptr<repository_fragment>& af) + { + string dn (move (d)); // <name>[_<version>] + size_t p (dn.rfind ('_')); // Version-separating underscore. + + // If the '_' separator is present, then make sure that the right-hand + // part looks like a version (not empty and only contains digits and + // dots). + // + if (p != string::npos) + { + if (p != dn.size () - 1) + { + for (size_t i (p + 1); i != dn.size (); ++i) + { + if (!digit (dn[i]) && dn[i] != '.') + { + p = string::npos; + break; + } + } + } + else + p = string::npos; + } + + // Parse the distribution version if present and leave it "0" otherwise. + // + semantic_version dv (0, 0, 0); + if (p != string::npos) + try + { + dv = semantic_version (dn, + p + 1, + semantic_version::allow_omit_minor); + + dn.resize (p); + } + catch (const invalid_argument& e) + { + // Note: the repository fragment may have no database associated when + // used in tests. + // + shared_ptr<repository_fragment> f (af.get_eager ()); + database* db (!(f != nullptr && !af.loaded ()) // Not transient? + ? &af.database () + : nullptr); + + diag_record dr (fail); + dr << "invalid distribution version '" << string (dn, p + 1) + << "' in value " << value_name << " for package " << ap->id.name + << ' ' << ap->version; + + if (db != nullptr) + dr << *db; + + dr << " in repository " << (f != nullptr ? f : af.load ())->location + << ": " << e; + } + + return make_pair (move (dn), move (dv)); + } + + strings system_package_manager:: + system_package_names (const available_packages& aps, + const string& name_id, + const string& version_id, + const vector<string>& like_ids) + { + assert (!aps.empty ()); + + semantic_version vid (parse_version_id (version_id, name_id)); + + // Return those <name>[_<version>]-name distribution values of the + // specified available packages whose <name> component matches the + // specified distribution name and the <version> component (assumed as "0" + // if not present) is less or equal the specified distribution version. + // Suppress duplicate values. + // + auto name_values = [&aps] (const string& n, const semantic_version& v) + { + strings r; + + // For each available package sort the system package names in the + // distribution version descending order and then append them to the + // resulting list, keeping this order and suppressing duplicates. + // + using name_version = pair<string, semantic_version>; + vector<name_version> nvs; // Reuse the buffer. + + for (const auto& a: aps) + { + nvs.clear (); + + const shared_ptr<available_package>& ap (a.first); + + for (const distribution_name_value& dv: ap->distribution_values) + { + if (optional<string> d = dv.distribution ("-name")) + { + pair<string, semantic_version> dnv ( + parse_distribution (move (*d), dv.name, ap, a.second)); + + if (dnv.first == n && dnv.second <= v) + { + // Add the name/version pair to the sorted vector. + // + name_version nv (make_pair (dv.value, move (dnv.second))); + + nvs.insert (upper_bound (nvs.begin (), nvs.end (), nv, + [] (const name_version& x, + const name_version& y) + {return x.second > y.second;}), + move (nv)); + } + } + } + + // Append the sorted names to the resulting list. + // + for (name_version& nv: nvs) + { + if (find_if (r.begin (), r.end (), + [&nv] (const string& n) {return nv.first == n;}) == + r.end ()) + { + r.push_back (move (nv.first)); + } + } + } + + return r; + }; + + // Collect distribution values for those <distribution>-name names which + // match the name id and refer to the version which is less or equal than + // the version id. + // + strings r (name_values (name_id, vid)); + + // If the resulting list is empty and the like ids are specified, then + // re-collect but now using the like id and "0" version id instead. + // + if (r.empty ()) + { + for (const string& like_id: like_ids) + { + r = name_values (like_id, semantic_version (0, 0, 0)); + if (!r.empty ()) + break; + } + } + + return r; + } + + optional<version> system_package_manager:: + downstream_package_version (const string& system_version, + const available_packages& aps, + const string& name_id, + const string& version_id, + const vector<string>& like_ids) + { + semantic_version vid (parse_version_id (version_id, name_id)); + + // Iterate over the passed available packages (in version descending + // order) and over the <name>[_<version>]-to-downstream-version + // distribution values they contain. Only consider those values whose + // <name> component matches the specified distribution name and the + // <version> component (assumed as "0" if not present) is less or equal + // the specified distribution version. For such values match the regex + // pattern against the passed system version and if it matches consider + // the replacement as the resulting downstream version candidate. Return + // this downstream version if the distribution version is equal to the + // specified one. Otherwise (the version is less), continue iterating + // while preferring downstream version candidates for greater distribution + // versions. Note that here we are trying to use a version mapping for the + // distribution version closest (but never greater) to the specified + // distribution version. So, for example, if both following values contain + // a matching mapping, then for debian 11 we prefer the downstream version + // produced by the debian_10-to-downstream-version value: + // + // debian_9-to-downstream-version + // debian_10-to-downstream-version + // + auto downstream_version = [&aps, &system_version] + (const string& n, + const semantic_version& v) -> optional<version> + { + optional<version> r; + semantic_version rv; + + for (const auto& a: aps) + { + const shared_ptr<available_package>& ap (a.first); + + for (const distribution_name_value& nv: ap->distribution_values) + { + if (optional<string> d = nv.distribution ("-to-downstream-version")) + { + pair<string, semantic_version> dnv ( + parse_distribution (move (*d), nv.name, ap, a.second)); + + if (dnv.first == n && dnv.second <= v) + { + auto bad_value = [&nv, &ap, &a] (const string& d) + { + // Note: the repository fragment may have no database + // associated when used in tests. + // + const lazy_shared_ptr<repository_fragment>& af (a.second); + shared_ptr<repository_fragment> f (af.get_eager ()); + database* db (!(f != nullptr && !af.loaded ()) // Not transient? + ? &af.database () + : nullptr); + + diag_record dr (fail); + dr << "invalid distribution value '" << nv.name << ": " + << nv.value << "' for package " << ap->id.name << ' ' + << ap->version; + + if (db != nullptr) + dr << *db; + + dr << " in repository " + << (f != nullptr ? f : af.load ())->location << ": " << d; + }; + + // Parse the distribution value into the regex pattern and the + // replacement. + // + // Note that in the future we may add support for some regex + // flags. + // + pair<string, string> rep; + try + { + size_t end; + const string& val (nv.value); + rep = regex_replace_parse (val.c_str (), val.size (), end); + } + catch (const invalid_argument& e) + { + bad_value (e.what ()); + } + + // Match the regex pattern against the system version and skip + // the value if it doesn't match or proceed to parsing the + // downstream version resulting from the regex replacement + // otherwise. + // + string dv; + try + { + regex re (rep.first, regex::ECMAScript); + + pair<string, bool> rr ( + regex_replace_match (system_version, re, rep.second)); + + // Skip the regex if it doesn't match. + // + if (!rr.second) + continue; + + dv = move (rr.first); + } + catch (const regex_error& e) + { + // Print regex_error description if meaningful (no space). + // + ostringstream os; + os << "invalid regex pattern '" << rep.first << "'" << e; + bad_value (os.str ()); + } + + // Parse the downstream version. + // + try + { + version ver (dv); + + // If the distribution version is equal to the specified one, + // then we are done. Otherwise, save the version if it is + // preferable and continue iterating. + // + // Note that bailing out immediately in the former case is + // essential. Otherwise, we can potentially fail later on, for + // example, some ill-formed regex which is already fixed in + // some newer package. + // + if (dnv.second == v) + return ver; + + if (!r || rv < dnv.second) + { + r = move (ver); + rv = move (dnv.second); + } + } + catch (const invalid_argument& e) + { + bad_value ("resulting downstream version '" + dv + + "' is invalid: " + e.what ()); + } + } + } + } + } + + return r; + }; + + // Try to deduce the downstream version using the + // <distribution>-to-downstream-version values that match the name id and + // refer to the version which is less or equal than the version id. + // + optional<version> r (downstream_version (name_id, vid)); + + // If the downstream version is not deduced and the like ids are + // specified, then re-try but now using the like id and "0" version id + // instead. + // + if (!r) + { + for (const string& like_id: like_ids) + { + r = downstream_version (like_id, semantic_version (0, 0, 0)); + if (r) + break; + } + } + + return r; + } +} |