libcryfs/src/gitversion/parser.cpp

89 lines
3.3 KiB
C++

#include "parser.h"
#include <sstream>
using std::string;
using std::pair;
using std::tuple;
using std::tie;
using boost::optional;
using boost::none;
using std::istringstream;
using std::getline;
namespace gitversion {
VersionInfo Parser::parse(const string &versionString) {
VersionInfo result;
string versionNumber;
optional<string> versionInfo;
tie(versionNumber, versionInfo) = _splitAt(versionString, '+');
tie(result.majorVersion, result.minorVersion, result.hotfixVersion, result.versionTag) = _extractMajorMinorHotfixTag(versionNumber);
result.isDevVersion = (versionInfo != none);
result.isStableVersion = !result.isDevVersion && (result.versionTag == "" || result.versionTag == "stable");
if (versionInfo != none && *versionInfo != "unknown") {
tie(result.gitCommitId, result.commitsSinceTag) = _extractGitCommitIdAndCommitsSinceTag(*versionInfo);
} else {
result.gitCommitId = "";
result.commitsSinceTag = 0;
}
return result;
}
pair<string, optional<string>> Parser::_splitAt(const string &versionString, char delimiter) {
istringstream stream(versionString);
string versionNumber;
getline(stream, versionNumber, delimiter);
if (!stream.good()) {
return std::make_pair(versionNumber, none);
} else {
string versionInfo;
getline(stream, versionInfo);
return std::make_pair(versionNumber, versionInfo);
}
}
tuple<string, string, string, string> Parser::_extractMajorMinorHotfixTag(const string &versionNumber) {
string majorMinorHotfix;
optional<string> versionTag;
tie(majorMinorHotfix, versionTag) = _splitAt(versionNumber, '-');
string major, minor, hotfix;
tie(major, minor, hotfix) = _extractMajorMinorHotfix(majorMinorHotfix);
if (versionTag == none) {
versionTag = "";
}
return std::make_tuple(major, minor, hotfix, *versionTag);
}
tuple<string, string, string> Parser::_extractMajorMinorHotfix(const string &versionNumber) {
istringstream stream(versionNumber);
string major, minor, hotfix;
getline(stream, major, '.');
if (!stream.good()) {
minor = "0";
} else {
getline(stream, minor, '.');
}
if (!stream.good()) {
hotfix = "0";
} else {
getline(stream, hotfix);
}
return std::make_tuple(major, minor, hotfix);
};
std::tuple<string, unsigned long> Parser::_extractGitCommitIdAndCommitsSinceTag(const string &versionInfo) {
istringstream stream(versionInfo);
string commitsSinceTag;
getline(stream, commitsSinceTag, '.');
if (!stream.good()) {
throw std::logic_error("Invalid version information: Missing delimiter after commitsSinceTag (versionInfo: "+versionInfo+").");
}
string gitCommitId;
getline(stream, gitCommitId, '.');
if (gitCommitId[0] != 'g') {
throw std::logic_error("Invalid version information: Git commit id component doesn't start with 'g' (versionInfo: "+versionInfo+").");
}
return std::make_tuple(gitCommitId.substr(1), std::stoul(commitsSinceTag));
}
}