/usr/bin/ubuntustudio-installer

#!/usr/bin/perl -w
# A script for taking package names on the command line, checking if they
# are available, and displaying a list from which the user can select which
# package(s) to install.
#
# this installer is intended to be used from an xdg desktop file so that
# the packages on the command line can match the menu where the 
# desktop file is displayed.

# lets set some variables here so they are easy to find:

# Start of our command to run package selection window
$zen = 'zenity --title="Ubuntu Studio - software installer" --width=650 --height=400 --list --text="Select the metas to install" --separator=" " --print-column=2 --checklist --column="select" --column="package"  --column="description" ';
# how many arguments?
$numpkgs = @ARGV;
# count var for packages actually found
$pksfnd = 0;

# print usage if no arguements
if ($numpkgs == 0) {
  print STDERR "USAGE:\n        ubuntustudio-installer <packagename> [<packagename>] ... \n";
    exit 1;
      }

# get a string with list of packages
for ($count = 0; $count < $numpkgs; $count++) {
  # check if exists while getting description
  $cachecmd = "apt-cache search -n $ARGV[$count] |";
  open(FHCACHE, $cachecmd);
  while (<FHCACHE>) {
    @ln = split;
    $p = shift @ln;
     if ($p eq $ARGV[$count]) {
      #get rid of -
      shift @ln;
      ++$pksfnd;
      #make description back into string
      $d = join(" ",@ln);
      #add a line onto zenity command line
      $zen = "$zen false $p \"$d\"";
      }
    }
   close (FHCACHE);
  }

# if none of the listed packages exist get out
if ($pksfnd == 0) {
  print STDERR "None of the packages appear to be the repos you are connected to\n";
    exec( "zenity --warning --text=\"packages not in repositories.\"");
      }  
      
# show the selection dialog and collect users selected packages
$SIG{PIPE} = "IGNORE";
open(FHSEL, "$zen|") || die "can't fork: $!";
  $selpkgs = <FHSEL>;
  close(FHSEL) || die "Transaction Canceled (status=$?)";

#run the install as system with progress bar in terminal and exit
if ($selpkgs) {
# initialize current percent to 0
  $pctcur = 0;
# run apt-get install -y open stdout as file handle
  $aptcmd = "pkexec apt-get install -y $selpkgs |";
  open(FHAPTG, $aptcmd) || die "Unable to run apt-get";
  
# run zenity --progress pipe we print to it's stdin
# zenity progree starts at 0%, initial text = "Installing"
  $zenprogcmd = " |zenity --progress --width=650 --no-cancel  --title=\"UbuntuStudio Installer\" --text=\"Installing\" --percentage=0";
  open(FHZENPROG, $zenprogcmd) || die "Failed to start zenity.";
# turn off buffering for FHZENPROG
  select (FHZENPROG);
  $| = 1;
  select (STDOUT);
# run loop for each line from aptget
  while (<FHAPTG>) {
    @ln = split;
    @ln = (@ln, ".");
                
#   start if else stuff
                
#   look for no. upgraded, no. newly installed
    if ($ln[1] eq "upgraded,") {
      $pkttl = $ln[0] + $ln[2];
#     step value is how many percent to add for each step
      if ($pkttl == 0) {
        $stepval = 0;
        }else{
        $stepval = 100 / ( $pkttl * 3  + 1);
        }
      print FHZENPROG "# $pkttl Packages to install. \n";
      sleep (1);

#     For each get:
      }elsif ($ln[0] =~ /^Get/) {
        $pctcur = $pctcur + $stepval;
        print FHZENPROG "$pctcur\n";
        print FHZENPROG "# Downloading $ln[3] \n";

#     For each Unpacking line:
      }elsif ($ln[0] =~ /^Unpackin/) {
        $pctcur = $pctcur + $stepval;
        print FHZENPROG "$pctcur\n";
        if ($ln[1] eq "replacement") {
          print FHZENPROG "# $ln[0] $ln[1] $ln[2] \n";
          }else{
          print FHZENPROG "# $ln[0] $ln[1] \n";
          }

#     For each Setting up line:
      }elsif ($ln[0] =~ /^Setting/) {
        $pctcur = $pctcur + $stepval;
        print FHZENPROG "$pctcur\n";
        print FHZENPROG "# @ln \n";
        }

    }

# apt-get has finished when we get here so close it's file handle
  close (FHAPTG);

  print FHZENPROG "# Installation complete. \n";
  print FHZENPROG "100\n";
# close file handle so that OK is the only live button.
  close (FHZENPROG);

}else{
  exec( "zenity --warning --text=\"no package chosen\"");
  }
ubuntustudio-installer 0.01 / usr / bin / ubuntustudio-installer
