79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
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#include "parser.h"
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#include <regex>
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using std::string;
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using std::pair;
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using std::tuple;
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using std::tie;
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using std::regex;
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using std::smatch;
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using std::regex_match;
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using boost::optional;
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using boost::none;
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namespace gitversion {
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VersionInfo Parser::parse(const string &versionString) {
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VersionInfo result;
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string versionNumber;
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optional<string> versionInfo;
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tie(versionNumber, versionInfo) = _splitAtPlusSign(versionString);
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tie(result.majorVersion, result.minorVersion, result.versionTag) = _extractMajorMinorTag(versionNumber);
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result.isDevVersion = (versionInfo != none);
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result.isStableVersion = !result.isDevVersion && (result.versionTag == "" || result.versionTag == "stable");
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if (versionInfo != none) {
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result.gitCommitId = _extractGitCommitId(*versionInfo);
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} else {
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result.gitCommitId = "";
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}
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return result;
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}
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pair<string, optional<string>> Parser::_splitAtPlusSign(const string &versionString) {
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regex splitRegex("^([^+]+)(\\+([^+]+))?$");
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smatch match;
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regex_match(versionString, match, splitRegex);
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if(match[0] != versionString) {
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throw std::logic_error("First match group should be whole string");
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}
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if(match.size() != 4) {
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throw std::logic_error("Wrong number of match groups");
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}
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if (match[2].matched) {
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return std::make_pair(match[1], optional<string>(match[3]));
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} else {
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return std::make_pair(match[1], none);
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}
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};
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tuple<string, string, string> Parser::_extractMajorMinorTag(const string &versionNumber) {
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regex splitRegex("^([0-9]+)\\.([0-9]+)\\.[0-9\\.]*(-(.*))?$");
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smatch match;
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regex_match(versionNumber, match, splitRegex);
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if(match[0] != versionNumber) {
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throw std::logic_error("First match group should be whole string");
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}
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if(match.size() != 5) {
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throw std::logic_error("Wrong number of match groups");
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}
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if(match[3].matched) {
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return std::make_tuple(match[1], match[2], match[4]);
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} else {
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return std::make_tuple(match[1], match[2], "");
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}
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};
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string Parser::_extractGitCommitId(const string &versionInfo) {
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regex extractRegex("^[0-9]+\\.g([0-9a-f]+)(\\..*)?$");
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smatch match;
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regex_match(versionInfo, match, extractRegex);
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if(match[0] != versionInfo) {
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throw std::logic_error("First match group should be whole string");
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}
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if(match.size() != 3) {
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throw std::logic_error("Wrong number of match groups");
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}
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return match[1];
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}
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}
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