1 files changed, 443 insertions, 0 deletions
diff --git a/apt-pkg/install-progress.cc b/apt-pkg/install-progress.cc
new file mode 100644
index 0000000..2b0dc21
--- /dev/null
+++ b/apt-pkg/install-progress.cc
@@ -0,0 +1,443 @@
+#include <config.h>
+
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/install-progress.h>
+#include <apt-pkg/strutl.h>
+
+#include <algorithm>
+#include <cmath>
+#include <csignal>
+#include <cstdio>
+#include <iostream>
+#include <sstream>
+#include <vector>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include <apti18n.h>
+
+namespace APT {
+namespace Progress {
+
+PackageManager::PackageManager() : d(NULL), percentage(0.0), last_reported_progress(-1) {}
+PackageManager::~PackageManager() {}
+
+/* Return a APT::Progress::PackageManager based on the global
+ * apt configuration (i.e. APT::Status-Fd and APT::Status-deb822-Fd)
+ */
+PackageManager* PackageManagerProgressFactory()
+{
+   // select the right progress
+   int status_fd = _config->FindI("APT::Status-Fd", -1);
+   int status_deb822_fd = _config->FindI("APT::Status-deb822-Fd", -1);
+
+   APT::Progress::PackageManager *progress = NULL;
+   if (status_deb822_fd > 0)
+      progress = new APT::Progress::PackageManagerProgressDeb822Fd(
+         status_deb822_fd);
+   else if (status_fd > 0)
+      progress = new APT::Progress::PackageManagerProgressFd(status_fd);
+   else if(_config->FindB("Dpkg::Progress-Fancy", false) == true)
+      progress = new APT::Progress::PackageManagerFancy();
+   else if (_config->FindB("Dpkg::Progress", 
+                           _config->FindB("DpkgPM::Progress", false)) == true)
+      progress = new APT::Progress::PackageManagerText();
+   else
+      progress = new APT::Progress::PackageManager();
+   return progress;
+}
+
+bool PackageManager::StatusChanged(std::string /*PackageName*/,
+                                   unsigned int StepsDone,
+                                   unsigned int TotalSteps,
+                                   std::string /*HumanReadableAction*/)
+{
+   int reporting_steps = _config->FindI("DpkgPM::Reporting-Steps", 1);
+   percentage = StepsDone/(double)TotalSteps * 100.0;
+   strprintf(progress_str, _("Progress: [%3li%%]"), std::lround(percentage));
+
+   if(percentage < (last_reported_progress + reporting_steps))
+      return false;
+
+   return true;
+}
+
+PackageManagerProgressFd::PackageManagerProgressFd(int progress_fd)
+   : d(NULL), StepsDone(0), StepsTotal(1)
+{
+   OutStatusFd = progress_fd;
+}
+PackageManagerProgressFd::~PackageManagerProgressFd() {}
+
+void PackageManagerProgressFd::WriteToStatusFd(std::string s)
+{
+   if(OutStatusFd <= 0)
+      return;
+   FileFd::Write(OutStatusFd, s.c_str(), s.size());   
+}
+
+static std::string GetProgressFdString(char const * const status,
+      char const * const pkg, unsigned long long Done,
+      unsigned long long Total, char const * const msg)
+{
+   float const progress{Done / static_cast<float>(Total) * 100};
+   std::ostringstream str;
+   str.imbue(std::locale::classic());
+   str.precision(4);
+   str << status << ':' << pkg << ':' << std::fixed << progress << ':' << msg << '\n';
+   return str.str();
+}
+
+void PackageManagerProgressFd::StartDpkg()
+{
+   if(OutStatusFd <= 0)
+      return;
+
+   // FIXME: use SetCloseExec here once it taught about throwing
+   //        exceptions instead of doing _exit(100) on failure
+   fcntl(OutStatusFd,F_SETFD,FD_CLOEXEC); 
+
+   // send status information that we are about to fork dpkg
+   WriteToStatusFd(GetProgressFdString("pmstatus", "dpkg-exec", StepsDone, StepsTotal, _("Running dpkg")));
+}
+
+void PackageManagerProgressFd::Stop()
+{
+}
+
+void PackageManagerProgressFd::Error(std::string PackageName,
+                                     unsigned int StepsDone,
+                                     unsigned int TotalSteps,
+                                     std::string ErrorMessage)
+{
+   WriteToStatusFd(GetProgressFdString("pmerror", PackageName.c_str(),
+	    StepsDone, TotalSteps, ErrorMessage.c_str()));
+}
+
+void PackageManagerProgressFd::ConffilePrompt(std::string PackageName,
+                                              unsigned int StepsDone,
+                                              unsigned int TotalSteps,
+                                              std::string ConfMessage)
+{
+   WriteToStatusFd(GetProgressFdString("pmconffile", PackageName.c_str(),
+	    StepsDone, TotalSteps, ConfMessage.c_str()));
+}
+
+
+bool PackageManagerProgressFd::StatusChanged(std::string PackageName, 
+                                             unsigned int xStepsDone,
+                                             unsigned int xTotalSteps,
+                                             std::string pkg_action)
+{
+   StepsDone = xStepsDone;
+   StepsTotal = xTotalSteps;
+
+   WriteToStatusFd(GetProgressFdString("pmstatus", StringSplit(PackageName, ":")[0].c_str(),
+	    StepsDone, StepsTotal, pkg_action.c_str()));
+
+   if(_config->FindB("Debug::APT::Progress::PackageManagerFd", false) == true)
+      std::cerr << "progress: " << PackageName << " " << xStepsDone
+                << " " << xTotalSteps << " " << pkg_action
+                << std::endl;
+
+
+   return true;
+}
+
+
+PackageManagerProgressDeb822Fd::PackageManagerProgressDeb822Fd(int progress_fd)
+   : d(NULL), StepsDone(0), StepsTotal(1)
+{
+   OutStatusFd = progress_fd;
+}
+PackageManagerProgressDeb822Fd::~PackageManagerProgressDeb822Fd() {}
+
+void PackageManagerProgressDeb822Fd::WriteToStatusFd(std::string s)
+{
+   FileFd::Write(OutStatusFd, s.c_str(), s.size());   
+}
+
+static std::string GetProgressDeb822String(char const * const status,
+      char const * const pkg, unsigned long long Done,
+      unsigned long long Total, char const * const msg)
+{
+   float const progress{Done / static_cast<float>(Total) * 100};
+   std::ostringstream str;
+   str.imbue(std::locale::classic());
+   str.precision(4);
+   str << "Status: " << status << '\n';
+   if (pkg != nullptr)
+      str << "Package: " << pkg << '\n';
+   str << "Percent: " << std::fixed << progress << '\n'
+      << "Message: " << msg << "\n\n";
+   return str.str();
+}
+
+void PackageManagerProgressDeb822Fd::StartDpkg()
+{
+   // FIXME: use SetCloseExec here once it taught about throwing
+   //        exceptions instead of doing _exit(100) on failure
+   fcntl(OutStatusFd,F_SETFD,FD_CLOEXEC); 
+
+   WriteToStatusFd(GetProgressDeb822String("progress", nullptr, StepsDone, StepsTotal, _("Running dpkg")));
+}
+
+void PackageManagerProgressDeb822Fd::Stop()
+{
+}
+
+void PackageManagerProgressDeb822Fd::Error(std::string PackageName,
+                                     unsigned int StepsDone,
+                                     unsigned int TotalSteps,
+                                     std::string ErrorMessage)
+{
+   WriteToStatusFd(GetProgressDeb822String("Error", PackageName.c_str(), StepsDone, TotalSteps, ErrorMessage.c_str()));
+}
+
+void PackageManagerProgressDeb822Fd::ConffilePrompt(std::string PackageName,
+                                              unsigned int StepsDone,
+                                              unsigned int TotalSteps,
+                                              std::string ConfMessage)
+{
+   WriteToStatusFd(GetProgressDeb822String("ConfFile", PackageName.c_str(), StepsDone, TotalSteps, ConfMessage.c_str()));
+}
+
+
+bool PackageManagerProgressDeb822Fd::StatusChanged(std::string PackageName, 
+                                             unsigned int xStepsDone,
+                                             unsigned int xTotalSteps,
+                                             std::string message)
+{
+   StepsDone = xStepsDone;
+   StepsTotal = xTotalSteps;
+
+   WriteToStatusFd(GetProgressDeb822String("progress", PackageName.c_str(), StepsDone, StepsTotal, message.c_str()));
+   return true;
+}
+
+
+PackageManagerFancy::PackageManagerFancy()
+   : d(NULL), child_pty(-1)
+{
+   // setup terminal size
+   if (instances.empty())
+      SIGWINCH_orig = signal(SIGWINCH, PackageManagerFancy::staticSIGWINCH);
+   instances.push_back(this);
+}
+std::vector<PackageManagerFancy*> PackageManagerFancy::instances;
+sighandler_t PackageManagerFancy::SIGWINCH_orig;
+volatile sig_atomic_t PackageManagerFancy::SIGWINCH_flag = 0;
+
+PackageManagerFancy::~PackageManagerFancy()
+{
+   instances.erase(find(instances.begin(), instances.end(), this));
+   if (instances.empty())
+      signal(SIGWINCH, SIGWINCH_orig);
+}
+
+void PackageManagerFancy::staticSIGWINCH(int /*signum*/)
+{
+   SIGWINCH_flag = 1;
+}
+
+void PackageManagerFancy::CheckSIGWINCH()
+{
+   if (SIGWINCH_flag)
+   {
+      SIGWINCH_flag = 0;
+      int errsv = errno;
+      int const nr_terminal_rows = GetTerminalSize().rows;
+      SetupTerminalScrollArea(nr_terminal_rows);
+      DrawStatusLine();
+      errno = errsv;
+   }
+}
+
+void PackageManagerFancy::Pulse()
+{
+   CheckSIGWINCH();
+}
+
+PackageManagerFancy::TermSize
+PackageManagerFancy::GetTerminalSize()
+{
+   struct winsize win;
+   PackageManagerFancy::TermSize s = { 0, 0 };
+
+   // FIXME: get from "child_pty" instead?
+   if(ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&win) != 0)
+      return s;
+
+   if(_config->FindB("Debug::InstallProgress::Fancy", false) == true)
+      std::cerr << "GetTerminalSize: " << win.ws_row << " x " << win.ws_col << std::endl;
+
+   s.rows = win.ws_row;
+   s.columns = win.ws_col;
+   return s;
+}
+
+void PackageManagerFancy::SetupTerminalScrollArea(int nr_rows)
+{
+     if(_config->FindB("Debug::InstallProgress::Fancy", false) == true)
+        std::cerr << "SetupTerminalScrollArea: " << nr_rows << std::endl;
+
+     if (unlikely(nr_rows <= 1))
+	return;
+
+     // scroll down a bit to avoid visual glitch when the screen
+     // area shrinks by one row
+     std::cout << "\n";
+         
+     // save cursor
+     std::cout << "\0337";
+         
+     // set scroll region (this will place the cursor in the top left)
+     std::cout << "\033[0;" << std::to_string(nr_rows - 1) << "r";
+            
+     // restore cursor but ensure its inside the scrolling area
+     std::cout << "\0338";
+     static const char *move_cursor_up = "\033[1A";
+     std::cout << move_cursor_up;
+
+     // ensure its flushed
+     std::flush(std::cout);
+
+     // setup tty size to ensure xterm/linux console are working properly too
+     // see bug #731738
+     struct winsize win;
+     if (ioctl(child_pty, TIOCGWINSZ, (char *)&win) != -1)
+     {
+	win.ws_row = nr_rows - 1;
+	ioctl(child_pty, TIOCSWINSZ, (char *)&win);
+     }
+}
+
+void PackageManagerFancy::HandleSIGWINCH(int)
+{
+   // for abi compatibility, do not use
+}
+
+void PackageManagerFancy::Start(int a_child_pty)
+{
+   child_pty = a_child_pty;
+   int const nr_terminal_rows = GetTerminalSize().rows;
+   SetupTerminalScrollArea(nr_terminal_rows);
+}
+
+void PackageManagerFancy::Stop()
+{
+   int const nr_terminal_rows = GetTerminalSize().rows;
+   if (nr_terminal_rows > 0)
+   {
+      SetupTerminalScrollArea(nr_terminal_rows + 1);
+
+      // override the progress line (sledgehammer)
+      static const char* clear_screen_below_cursor = "\033[J";
+      std::cout << clear_screen_below_cursor;
+      std::flush(std::cout);
+   }
+   child_pty = -1;
+}
+
+std::string 
+PackageManagerFancy::GetTextProgressStr(float Percent, int OutputSize)
+{
+   std::string output;
+   if (unlikely(OutputSize < 3))
+      return output;
+
+   int const BarSize = OutputSize - 2; // bar without the leading "[" and trailing "]"
+   int const BarDone = std::max(0, std::min(BarSize, static_cast<int>(std::floor(Percent * BarSize))));
+   output.append("[");
+   std::fill_n(std::fill_n(std::back_inserter(output), BarDone, '#'), BarSize - BarDone, '.');
+   output.append("]");
+   return output;
+}
+
+bool PackageManagerFancy::StatusChanged(std::string PackageName, 
+                                        unsigned int StepsDone,
+                                        unsigned int TotalSteps,
+                                        std::string HumanReadableAction)
+{
+   if (!PackageManager::StatusChanged(PackageName, StepsDone, TotalSteps,
+          HumanReadableAction))
+      return false;
+
+   return DrawStatusLine();
+}
+bool PackageManagerFancy::DrawStatusLine()
+{
+   PackageManagerFancy::TermSize const size = GetTerminalSize();
+   if (unlikely(size.rows < 1 || size.columns < 1))
+      return false;
+
+   static std::string save_cursor = "\0337";
+   static std::string restore_cursor = "\0338";
+
+   // green
+   static std::string set_bg_color = DeQuoteString(
+      _config->Find("Dpkg::Progress-Fancy::Progress-fg", "%1b[42m"));
+   // black
+   static std::string set_fg_color = DeQuoteString(
+      _config->Find("Dpkg::Progress-Fancy::Progress-bg", "%1b[30m"));
+
+   static std::string restore_bg =  "\033[49m";
+   static std::string restore_fg = "\033[39m";
+
+   std::cout << save_cursor
+      // move cursor position to last row
+             << "\033[" << std::to_string(size.rows) << ";0f"
+             << set_bg_color
+             << set_fg_color
+             << progress_str
+             << restore_bg
+             << restore_fg;
+   std::flush(std::cout);
+
+   // draw text progress bar
+   if (_config->FindB("Dpkg::Progress-Fancy::Progress-Bar", true))
+   {
+      int padding = 4;
+      auto const progressbar_size = size.columns - padding - String::DisplayLength(progress_str);
+      auto const current_percent = percentage / 100.0f;
+      std::cout << " " 
+                << GetTextProgressStr(current_percent, progressbar_size)
+                << " ";
+      std::flush(std::cout);
+   }
+
+   // restore
+   std::cout << restore_cursor;
+   std::flush(std::cout);
+
+   last_reported_progress = percentage;
+
+   return true;
+}
+
+bool PackageManagerText::StatusChanged(std::string PackageName, 
+                                       unsigned int StepsDone,
+                                       unsigned int TotalSteps,
+                                       std::string HumanReadableAction)
+{
+   if (!PackageManager::StatusChanged(PackageName, StepsDone, TotalSteps, HumanReadableAction))
+      return false;
+
+   std::cout << progress_str << "\r\n";
+   std::flush(std::cout);
+                   
+   last_reported_progress = percentage;
+
+   return true;
+}
+
+PackageManagerText::PackageManagerText() : PackageManager(), d(NULL) {}
+PackageManagerText::~PackageManagerText() {}
+
+
+
+
+} // namespace progress
+} // namespace apt