Avoid error output on some tests, no avahi workaround if avahi is already installed

install_yunohostv2

@@ -19,11 +19,35 @@ print() {
     printf "%s\n" "$*";
 }
 
-die() {
+notify_about_install_logs() {
     print "
-Yunohost installation error :
+Installation logs are located in /var/log/yunohost.log
+" 1>&2
 
-$1" 1>&2
+}
+
+success() {
+    tput setf 2
+    print "
+Success !
+"
+    tput sgr 0
+    notify_about_install_logs
+}
+
+die() {
+    print "\
+=================================================="
+
+    tput setf 4
+    print "
+Failure !
+The following error was caught during Yunohost installation :
+
+$1
+" 1>&2
+    tput sgr 0
+    notify_about_install_logs
     exit ${2:-1}
 }
 
@@ -97,7 +121,7 @@ set_domain() {
     # Configure hostname to yunohost.yunohost.org if not already set
     # NOTE: This is done also during postinstall "to avoid amavis bug"
     #       so we might not need it here
-    [ "$(hostname -d)" != "" ] || hostname yunohost.yunohost.org > /dev/null 2>&1
+    [ "$(hostname -d > /dev/null 2>&1)" != "" ] || hostname yunohost.yunohost.org > /dev/null 2>&1
 }
 
 confirm_installation() {
@@ -135,7 +159,7 @@ setup_package_source() {
     fi
 
     # Add YunoHost repository key to the keyring
-    wget -O- http://repo.yunohost.org/yunohost.asc -q | apt-key add - -qq
+    wget -O- http://repo.yunohost.org/yunohost.asc -q | apt-key add - -qq > /dev/null
 }
 
 apt_update() {
@@ -155,21 +179,25 @@ register_debconf() {
 }
 
 workaround_avahi_installation() {
+
     # When attempting several installation of Yunohost on the same host
     # with a light VM system like LXC
     # we hit a bug with avahi-daemon postinstallation
     # This is described in detail in https://github.com/lxc/lxc/issues/25
-    #
+    #  
-    # It makes the configure step of avahii-daemon fail, because the service does
+    # It makes the configure step of avahi-daemon fail, because the service does
-    # start correctly. Then all other packages depending on avahi-daemon refuse to
+    # start correctly. Then all other packages depending on avahi-daemon refuse to
     # configure themselves.
-    #
+    #  
     # The workaround we use is to generate a random uid for the avahi user, and
     # create the user with this id beforehand, so that the avahi-daemon postinst
     # script does not do it on its own. Our randomized uid has far less chances to
     # be already in use in another system than the automated one (which tries to use
     # consecutive uids).
-   
+  
+    # Return without error if avahi already exists
+    [ $(id avahi > /dev/null 2>&1) ] || return 0
+ 
     # Get a random unused uid between 500 and 999 (system-user) 
     local avahi_id=$((500 + $RANDOM % 500))
     while [ $(cat /etc/passwd | cut -d ':' -f 3 | grep $avahi_id) ] ;
@@ -191,7 +219,10 @@ install_yunohost_packages() {
         --                                           \
         apt-get -o Dpkg::Options::="--force-confold" \
                 -y install                           \
-                yunohost
+                yunohost yunohost-config             \
+                yunohost-config-postfix              \
+                postfix postfix-ldap                 \
+                postfix-policyd-spf-perl
 }
 
 restart_services() {
@@ -205,6 +236,9 @@ restart_services() {
 }
 
 post_install() {
+    # Remove whiptail and dialog remains...
+    clear
+
     local text="
 Yunohost packages have been installed successfully!
 
@@ -237,7 +271,7 @@ Yunohost post-installation has failed.
 Do you want to try again now?
 "
         whiptail --title "Post-installation" --yesno "$text_retry" 12 78 --defaultno \
-            && return $POSTINSTALL_EXIT_CODE
+            || return $POSTINSTALL_EXIT_CODE
 
         /usr/bin/yunohost tools postinstall
         POSTINSTALL_EXIT_CODE="$?"
@@ -254,47 +288,38 @@ if ! ensure_root ; then
   die "This script must be run as root" 1
 fi
 
-echo installscript_dependencies
 if ! installscript_dependencies ; then
   die "Unable to install dependencies to install script" 2 
 fi
 
-echo create_custom_config
 if ! create_custom_config ; then
   die "Creating custom configuration file /etc/yunohost/yunohost.conf failed" 3
 fi
 
-echo set_domain
 if ! set_domain ; then
   die "Setting hostname failed" 4
 fi
 
-echo confirm_installation
 if ! confirm_installation ; then
   die "Installation cancelled at your request" 5
 fi
 
-echo setup_package_source
 if ! setup_package_source "$@" ; then
   die "Setting up deb package sources failed" 6
 fi
 
-echo apt_update
 if ! apt_update ; then
   die "Error caught during 'apt-get update'" 7
 fi
 
-echo register_debconf
 if ! register_debconf ; then
   die "Unable to insert new values into debconf database" 8
 fi
 
-echo workaround_avahi_installation
 if ! workaround_avahi_installation ; then
   die "Unable to install workaround for avahi installation" 20
 fi
 
-echo install_yunohost_packages
 if ! install_yunohost_packages ; then
   die "\
 Installation of Yunohost packages failed
@@ -303,16 +328,15 @@ You can check the install logs saved in /var/log/yunohost.log
 " 9
 fi
 
-echo restart_services
 if ! restart_services ; then
   die "Error caught during services restart" 10
 fi
 
-echo post_install
 if ! post_install ; then
   die "Post-installation failed" 11
 fi
 
 # Success !
+success
 exit 0