Improve progress bar a bit

Author: probonopd

AppImageUpdate.AppDir/usr/bin/appimageupdate

@@ -5,6 +5,11 @@ set -e
 # This script is supposed to be run either on the command line
 # or though the appimageupdate GUI. The GUI is purely optional.
 # It displays stdout and stderr, as well as a progress indicator.
+# Communication between this script and the GUI happen through
+# file descriptors (&1 = stdout, &2 = stderr, $3 ... up to &9)
+# http://stackoverflow.com/questions/2342826/how-to-pipe-stderr-and-not-stdout
+#
+# echo "######" | tee >(sed -e 's/#/#\n/g' >&1)
 
 error()
 {
@@ -129,7 +134,7 @@ if [ "$TYPE" == "zsync" ] ; then
   # .part appended, so it will automatically find previously interrupted zsync
   # downloads and reuse the data already downloaded.
   ZSYNC_URL=$(echo "${APPLICATION_USED}" | cut -d "|" -f 2) # Get the URL of the zsync file
-  zsync_curl -# -I -i "${ISO}" "${ZSYNC_URL}" # Get the file with zsync using $1 as an input file
+  zsync_curl -# -I -i "${ISO}" "${ZSYNC_URL}" 2>&1 | tee >(sed -e 's/#/#\n/g') # Get the file with zsync using $1 as an input file
   NEWFILE=$(basename "${ZSYNC_URL}" | sed -e 's|.zsync||g' ) # FIXME: Use the file that zsync has written!!!
   chmod --reference="${ISO}" "${NEWFILE}"* # Set the same permissions as for the original file
   gpg_check
@@ -158,7 +163,7 @@ elif [ "$TYPE" == "bintray-zsync" ] ; then
     echo "Latest version: ${VERSION}"
   fi
   ZSYNC_URL=$(echo "${DUMMY_URL}" | sed -e "s|_latestVersion|$VERSION|g" )
-  zsync_curl -I -i "${ISO}" "${ZSYNC_URL}" # Get the file with zsync using $1 as an input file
+  zsync_curl -I -i "${ISO}" "${ZSYNC_URL}" 2>&1 | tee >(sed -e 's/#/#\n/g') # Get the file with zsync using $1 as an input file
   NEWFILE=$(basename "${ZSYNC_URL}" | sed -e 's|.zsync||g' ) # FIXME: Use the file that zsync has written!!!
   chmod --reference="${ISO}" "${NEWFILE}"* # Set the same permissions as for the original file
   gpg_check

appimageupdategui/progress.vala

@@ -1,5 +1,9 @@
 using Gtk;
 
+// http://stackoverflow.com/questions/20846511/read-write-file-pipes-in-vala-glib
+// http://www.valadoc.org/#!api=glib-2.0/GLib.IOChannel.IOChannel.unix_new
+// http://www.valadoc.org/#!api=glib-2.0/GLib.IOChannel
+
 public class ProgressWindow : Window {
 
     private string file_name;
@@ -129,7 +133,7 @@ public class ProgressWindow : Window {
 		    string line;
 		    channel.read_line (out line, null, null);
 		    stdout.printf(line); // Be verbose
-                    file_counts = 12; // TODO: Get from command line output
+                    file_counts = 30; // TODO: Get from command line output
                     action_label.label = line.substring(0, line.length - 1);
                     counter++;
                     progress.set_fraction( 1.0f * counter / file_counts);