diff options
| -rw-r--r-- | bpkg/host-os-release.cxx | 121 | ||||
| -rw-r--r-- | bpkg/host-os-release.hxx | 59 | ||||
| -rw-r--r-- | bpkg/host-os-release.test.cxx | 55 | ||||
| -rw-r--r-- | bpkg/host-os-release.test.testscript | 178 |
4 files changed, 413 insertions, 0 deletions
diff --git a/bpkg/host-os-release.cxx b/bpkg/host-os-release.cxx new file mode 100644 index 0000000..1a5a980 --- /dev/null +++ b/bpkg/host-os-release.cxx @@ -0,0 +1,121 @@ +// file : bpkg/host-os-release.cxx -*- C++ -*- +// license : MIT; see accompanying LICENSE file + +#include <bpkg/host-os-release.hxx> + +#include <libbutl/string-parser.hxx> // parse_quoted() + +#include <bpkg/diagnostics.hxx> + +using namespace butl; + +namespace bpkg +{ + // Note: not static for access from the unit test. + // + os_release + host_os_release_linux (path f = {}) + { + os_release r; + + // According to os-release(5), we should use /etc/os-release and fallback + // to /usr/lib/os-release if the former does not exist. It also lists the + // fallback values for individual variables, in case some are not present. + // + if (!f.empty () + ? exists (f) + : (exists (f = path ("/etc/os-release")) || + exists (f = path ("/usr/lib/os-release")))) + { + try + { + ifdstream ifs (f, ifdstream::badbit); + + string l; + for (uint64_t ln (1); !eof (getline (ifs, l)); ++ln) + { + trim (l); + + // Skip blanks lines and comments. + // + if (l.empty () || l[0] == '#') + continue; + + // The variable assignments are in the "shell style" and so can be + // quoted/escaped. For now we only handle quoting, which is what all + // the instances seen in the wild seems to use. + // + size_t p (l.find ('=')); + if (p == string::npos) + continue; + + string n (l, 0, p); + l.erase (0, p + 1); + + using string_parser::parse_quoted; + using string_parser::invalid_string; + + try + { + if (n == "ID_LIKE") + { + r.like_ids.clear (); + + vector<string> vs (parse_quoted (l, true /* unquote */)); + for (const string& v: vs) + { + for (size_t b (0), e (0); next_word (v, b, e); ) + { + r.like_ids.push_back (string (v, b, e - b)); + } + } + } + else if (string* p = (n == "ID" ? &r.name_id : + n == "VERSION_ID" ? &r.version_id : + n == "VARIANT_ID" ? &r.variant_id : + n == "NAME" ? &r.name : + n == "VERSION_CODENAME" ? &r.version_codename : + n == "VARIANT" ? &r.variant : + nullptr)) + { + vector<string> vs (parse_quoted (l, true /* unquote */)); + switch (vs.size ()) + { + case 0: *p = ""; break; + case 1: *p = move (vs.front ()); break; + default: throw invalid_string (0, "multiple values"); + } + } + } + catch (const invalid_string& e) + { + location loc (move (f).string (), ln); + fail (loc) << "invalid " << n << " value: " << e; + } + } + + ifs.close (); + } + catch (const io_error& e) + { + fail << "unable to read from " << f << ": " << e; + } + } + + // Assign fallback values. + // + if (r.name_id.empty ()) r.name_id = "linux"; + if (r.name.empty ()) r.name = "Linux"; + + return r; + } + + optional<os_release> + host_os_release (const target_triplet& host) + { + if (host.class_ == "linux") + return host_os_release_linux (); + else + return nullopt; + } +} diff --git a/bpkg/host-os-release.hxx b/bpkg/host-os-release.hxx new file mode 100644 index 0000000..3f85cb2 --- /dev/null +++ b/bpkg/host-os-release.hxx @@ -0,0 +1,59 @@ +// file : bpkg/host-os-release.hxx -*- C++ -*- +// license : MIT; see accompanying LICENSE file + +#ifndef BPKG_HOST_OS_RELEASE_HXX +#define BPKG_HOST_OS_RELEASE_HXX + +#include <bpkg/types.hxx> +#include <bpkg/utility.hxx> + +namespace bpkg +{ + // Information extracted from /etc/os-release on Linux. See os-release(5) + // for background. For other platforms we derive the equivalent information + // from other sources. Some examples: + // + // {"debian", {}, "10", "", + // "Debian GNU/Linux", "buster", ""} + // + // {"fedora", {}, "35", "workstation", + // "Fedora Linux", "", "Workstation Edition"} + // + // {"ubuntu", {"debian"}, "20.04", "", + // "Ubuntu", "focal", ""} + // + // {"windows", {}, "10", "", + // "Windows", "", ""} + // + // Note that version_id may be empty, for example, on Debian testing: + // + // {"debian", {}, "", "", + // "Debian GNU/Linux", "", ""} + // + // Note also that we don't extract PRETTY_NAME because its content is + // unpredictable. For example, it may include variant, as in "Fedora Linux + // 35 (Workstation Edition)". Instead, construct it from the individual + // components as appropriate, normally "$name $version ($version_codename)". + // + struct os_release + { + string name_id; // ID + vector<string> like_ids; // ID_LIKE + string version_id; // VERSION_ID + string variant_id; // VARIANT_ID + + string name; // NAME + string version_codename; // VERSION_CODENAME + string variant; // VARIANT + }; + + // Return the release information for the specified host or nullopt if the + // specific host is unknown/unsupported. Note that "host" here implies that + // we may be examining files, environment variables, etc., of the machine we + // are running on. + // + optional<os_release> + host_os_release (const target_triplet& host); +} + +#endif // BPKG_HOST_OS_RELEASE_HXX diff --git a/bpkg/host-os-release.test.cxx b/bpkg/host-os-release.test.cxx new file mode 100644 index 0000000..e65c3ca --- /dev/null +++ b/bpkg/host-os-release.test.cxx @@ -0,0 +1,55 @@ +// file : bpkg/host-os-release.test.cxx -*- C++ -*- +// license : MIT; see accompanying LICENSE file + +#include <bpkg/host-os-release.hxx> + +#include <bpkg/types.hxx> +#include <bpkg/utility.hxx> + +#include <iostream> + +#undef NDEBUG +#include <cassert> + +using namespace std; + +namespace bpkg +{ + extern os_release + host_os_release_linux (path f = {}); + + int + main (int argc, char* argv[]) + { + assert (argc >= 2); // <host-target-triplet> + + target_triplet host (argv[1]); + + os_release r; + if (host.class_ == "linux") + { + assert (argc == 3); // <host-target-triplet> <file-path> + r = host_os_release_linux (path (argv[2])); + } + else + assert (false); + + cout << r.name_id << '\n'; + for (auto b (r.like_ids.begin ()), i (b); i != r.like_ids.end (); ++i) + cout << (i != b ? "|" : "") << *i; + cout << '\n' + << r.version_id << '\n' + << r.variant_id << '\n' + << r.name << '\n' + << r.version_codename << '\n' + << r.variant << '\n'; + + return 0; + } +} + +int +main (int argc, char* argv[]) +{ + return bpkg::main (argc, argv); +} diff --git a/bpkg/host-os-release.test.testscript b/bpkg/host-os-release.test.testscript new file mode 100644 index 0000000..b32c477 --- /dev/null +++ b/bpkg/host-os-release.test.testscript @@ -0,0 +1,178 @@ +# file : bpkg/host-os-release.test.testscript +# license : MIT; see accompanying LICENSE file + +: linux +: +$* x86_64-linux-gnu os-release >>EOO + linux + + + + Linux + + + EOO + +: debian-10 +: +cat <<EOI >=os-release; + PRETTY_NAME="Debian GNU/Linux 10 (buster)" + NAME="Debian GNU/Linux" + VERSION_ID="10" + VERSION="10 (buster)" + VERSION_CODENAME=buster + ID=debian + HOME_URL="https://www.debian.org/" + SUPPORT_URL="https://www.debian.org/support" + BUG_REPORT_URL="https://bugs.debian.org/" + EOI +$* x86_64-linux-gnu os-release >>EOO + debian + + 10 + + Debian GNU/Linux + buster + + EOO + +: debian-testing +: +cat <<EOI >=os-release; + PRETTY_NAME="Debian GNU/Linux bookworm/sid" + NAME="Debian GNU/Linux" + ID=debian + HOME_URL="https://www.debian.org/" + SUPPORT_URL="https://www.debian.org/support" + BUG_REPORT_URL="https://bugs.debian.org/" + EOI +$* x86_64-linux-gnu os-release >>EOO + debian + + + + Debian GNU/Linux + + + EOO + +: ubuntu-20.04 +: +cat <<EOI >=os-release; + NAME="Ubuntu" + VERSION="20.04.1 LTS (Focal Fossa)" + ID=ubuntu + ID_LIKE=debian + PRETTY_NAME="Ubuntu 20.04.1 LTS" + VERSION_ID="20.04" + HOME_URL="https://www.ubuntu.com/" + SUPPORT_URL="https://help.ubuntu.com/" + BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" + PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy" + VERSION_CODENAME=focal + UBUNTU_CODENAME=focal + EOI +$* x86_64-linux-gnu os-release >>EOO + ubuntu + debian + 20.04 + + Ubuntu + focal + + EOO + +: fedora-35 +: +cat <<EOI >=os-release; + NAME="Fedora Linux" + VERSION="35 (Workstation Edition)" + ID=fedora + VERSION_ID=35 + VERSION_CODENAME="" + PLATFORM_ID="platform:f35" + PRETTY_NAME="Fedora Linux 35 (Workstation Edition)" + ANSI_COLOR="0;38;2;60;110;180" + LOGO=fedora-logo-icon + CPE_NAME="cpe:/o:fedoraproject:fedora:35" + HOME_URL="https://fedoraproject.org/" + DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f35/system-administrators-guide/" + SUPPORT_URL="https://ask.fedoraproject.org/" + BUG_REPORT_URL="https://bugzilla.redhat.com/" + REDHAT_BUGZILLA_PRODUCT="Fedora" + REDHAT_BUGZILLA_PRODUCT_VERSION=35 + REDHAT_SUPPORT_PRODUCT="Fedora" + REDHAT_SUPPORT_PRODUCT_VERSION=35 + PRIVACY_POLICY_URL="https://fedoraproject.org/wiki/Legal:PrivacyPolicy" + VARIANT="Workstation Edition" + VARIANT_ID=workstation + EOI +$* x86_64-linux-gnu os-release >>EOO + fedora + + 35 + workstation + Fedora Linux + + Workstation Edition + EOO + +: rhel-8.2 +: +cat <<EOI >=os-release; + NAME="Red Hat Enterprise Linux" + VERSION="8.2 (Ootpa)" + ID="rhel" + ID_LIKE="fedora" + VERSION_ID="8.2" + PLATFORM_ID="platform:el8" + PRETTY_NAME="Red Hat Enterprise Linux 8.2 (Ootpa)" + ANSI_COLOR="0;31" + CPE_NAME="cpe:/o:redhat:enterprise_linux:8.2:GA" + HOME_URL="https://www.redhat.com/" + BUG_REPORT_URL="https://bugzilla.redhat.com/" + + REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 8" + REDHAT_BUGZILLA_PRODUCT_VERSION=8.2 + REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux" + REDHAT_SUPPORT_PRODUCT_VERSION="8.2" + EOI +$* x86_64-linux-gnu os-release >>EOO + rhel + fedora + 8.2 + + Red Hat Enterprise Linux + + + EOO + +: centos-8 +: +cat <<EOI >=os-release; + NAME="CentOS Linux" + VERSION="8 (Core)" + ID="centos" + ID_LIKE="rhel fedora" + VERSION_ID="8" + PLATFORM_ID="platform:el8" + PRETTY_NAME="CentOS Linux 8 (Core)" + ANSI_COLOR="0;31" + CPE_NAME="cpe:/o:centos:centos:8" + HOME_URL="https://www.centos.org/" + BUG_REPORT_URL="https://bugs.centos.org/" + + CENTOS_MANTISBT_PROJECT="CentOS-8" + CENTOS_MANTISBT_PROJECT_VERSION="8" + REDHAT_SUPPORT_PRODUCT="centos" + REDHAT_SUPPORT_PRODUCT_VERSION="8" + EOI +$* x86_64-linux-gnu os-release >>EOO + centos + rhel|fedora + 8 + + CentOS Linux + + + EOO |