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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* ######################################################################
Set of functions for parsing the history log
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <config.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/history.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/tagfile.h>
#include <algorithm>
#include <cassert>
#include <cctype>
#include <glob.h>
#include <apti18n.h> // for coloring
namespace APT::History
{
static Change ParsePackageEvent(const std::string &event)
{
Change change{};
// Remove all spaces
std::string trimEvent = event;
trimEvent.erase(std::remove_if(trimEvent.begin(), trimEvent.end(),
[](unsigned char c)
{ return std::isspace(c); }),
trimEvent.end());
auto openParen = trimEvent.find('(');
if (openParen == std::string::npos)
return change;
change.package = trimEvent.substr(0, openParen);
auto closeParen = trimEvent.find(')', openParen);
if (closeParen == std::string::npos)
return change;
std::string versionStr = trimEvent.substr(openParen + 1, closeParen - openParen - 1);
auto values = VectorizeString(versionStr, ',');
for (size_t i = 0; i < values.size(); ++i)
{
if (i == 0 && std::isdigit(values[0][0]))
change.currentVersion = std::move(values[i]);
else if (i == 1 && std::isdigit(values[1][0]))
change.candidateVersion = std::move(values[i]);
else if (values[i] == "automatic")
change.automatic = true;
else
_error->Warning(_("Unknown flag: %s"), values[i].c_str());
}
return change;
}
static std::vector<std::string> SplitPackagesInContent(const std::string &content)
{
std::vector<std::string> result;
std::size_t start = 0;
if (content.length() == 0)
return result;
// Split at "), " but keep the parenthesis.
while (true)
{
std::size_t pos = content.find("), ", start);
if (pos == std::string::npos)
{
result.push_back(content.substr(start));
break;
}
result.push_back(content.substr(start, pos - start + 1));
// Increment by 3 since 3 == len("), ")
start = pos + 3;
}
return result;
}
std::string KindToString(const Kind &kind)
{
switch (kind)
{
case Kind::Install:
return "Install";
case Kind::Reinstall:
return "Reinstall";
case Kind::Upgrade:
return "Upgrade";
case Kind::Downgrade:
return "Downgrade";
case Kind::Remove:
return "Remove";
case Kind::Purge:
return "Purge";
default:
return "Undefined";
}
}
Entry ParseSection(
const pkgTagSection §ion)
{
Entry entry{};
entry.startDate = section.Find("Start-Date");
entry.endDate = section.Find("End-Date");
entry.cmdLine = section.Find("Commandline");
entry.requestingUser = section.Find("Requested-By");
entry.comment = section.Find("Comment");
entry.error = section.Find("Error");
std::string content = "";
const Kind kinds[] =
{
Kind::Install,
Kind::Reinstall,
Kind::Downgrade,
Kind::Upgrade,
Kind::Remove,
Kind::Purge,
};
for (const auto &kind : kinds)
{
content = section.Find(KindToString(kind));
if (content.empty())
continue;
std::vector<std::string> package_events = SplitPackagesInContent(content);
std::vector<Change> changes = {};
for (auto event : package_events)
{
Change change = ParsePackageEvent(event);
change.kind = kind;
changes.push_back(change);
}
// Changed packages should be in order
std::sort(changes.begin(), changes.end(), [](const Change &a, const Change &b)
{ return a.package < b.package; });
entry.changeMap[kind] = changes;
}
return entry;
}
bool ParseFile(FileFd &fd, HistoryBuffer &buf)
{
pkgTagFile file(&fd, FileFd::ReadOnly);
pkgTagSection tmpSection;
while (file.Step(tmpSection))
buf.push_back(ParseSection(tmpSection));
return true;
}
bool ParseLogDir(HistoryBuffer &buf)
{
std::string files = _config->FindFile("Dir::Log::History") + "*";
const char *pattern = files.data();
glob_t result;
int ret = glob(pattern, GLOB_TILDE, nullptr, &result);
if (ret != 0)
return _error->Error(_("Cannot find history files: %s"), files.c_str());
for (size_t i = 0; i < result.gl_pathc; ++i)
{
FileFd fd;
if (not fd.Open(result.gl_pathv[i], FileFd::ReadOnly, FileFd::Extension))
return _error->Error(_("Could not open file: %s"), result.gl_pathv[i]);
if (not ParseFile(fd, buf))
return _error->Error(_("Could not parse file: %s"), result.gl_pathv[i]);
if (not fd.Close())
return _error->Error(_("Could not close file: %s"), result.gl_pathv[i]);
}
// Sort entries by time
std::sort(buf.begin(), buf.end(),
[](const Entry &a, const Entry &b)
{
return a.startDate < b.startDate;
});
return true;
}
} // namespace APT::History
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