check connectivity to github.com before installing and/or updating tpm and plugins, fixes #513

.tmux.conf

@@ -1341,29 +1341,35 @@ run 'cut -c3- ~/.tmux.conf | sh -s _apply_configuration'
 #   tmux_conf_update_plugins_on_reload="$3"
 #
 #   TMUX_PLUGIN_MANAGER_PATH=${TMUX_PLUGIN_MANAGER_PATH:-~/.tmux/plugins}
-#   if [ ! -d "$TMUX_PLUGIN_MANAGER_PATH/tpm" ]; then
-#     install_tpm=true
-#     tmux display 'Installing tpm and plugins...'
-#     git clone --depth 1 https://github.com/tmux-plugins/tpm "$TMUX_PLUGIN_MANAGER_PATH/tpm"
-#   elif { [ -z "$window_active" ] && _is_enabled "$tmux_conf_update_plugins_on_launch"; } || { [ -n "$window_active" ] && _is_enabled "$tmux_conf_update_plugins_on_reload"; }; then
-#     update_tpm=true
-#     tmux display 'Updating tpm and plugins...'
-#     (cd "$TMUX_PLUGIN_MANAGER_PATH/tpm" && git checkout -q master && git reset -q --hard HEAD && git pull -q origin master)
-#   fi
-#   if [ x"$install_tpm" = x"true" ] || [ x"$update_tpm" = x"true" ]; then
-#     perl -0777 -p -i -e 's/git clone --recursive/git clone --recursive --depth 1 --shallow-submodules/g
-#                         ;s/(install_plugin "\$plugin")\n(\s+)done/\1&\n\2done\n\2wait/g' "$TMUX_PLUGIN_MANAGER_PATH/tpm/scripts/install_plugins.sh"
-#     perl -p -i -e 's/git submodule update --init --recursive/git submodule update --init --recursive --depth 1/g' "$TMUX_PLUGIN_MANAGER_PATH/tpm/scripts/update_plugin.sh"
-#     tmux set-environment -g TMUX_PLUGIN_MANAGER_PATH "$TMUX_PLUGIN_MANAGER_PATH"
-#   fi
-#   if [ x"$update_tpm" = x"true" ]; then
-#     "$TMUX_PLUGIN_MANAGER_PATH/tpm/bin/update_plugins" all >/dev/null 2>&1
-#     tmux display 'Done updating tpm and plugins...'
-#   elif [ x"$install_tpm" = x"true" ]; then
-#     "$TMUX_PLUGIN_MANAGER_PATH/tpm/bin/install_plugins" >/dev/null 2>&1
-#     tmux display 'Done installing tpm and plugins...'
+#
+#   if curl -Ikfs -o /dev/null --connect-timeout 2 --max-time 2 https://github.com; then
+#     if [ ! -d "$TMUX_PLUGIN_MANAGER_PATH/tpm" ]; then
+#       install_tpm=true
+#       tmux display 'Installing tpm and plugins...'
+#       git clone --depth 1 https://github.com/tmux-plugins/tpm "$TMUX_PLUGIN_MANAGER_PATH/tpm"
+#     elif { [ -z "$window_active" ] && _is_enabled "$tmux_conf_update_plugins_on_launch"; } || { [ -n "$window_active" ] && _is_enabled "$tmux_conf_update_plugins_on_reload"; }; then
+#       update_tpm=true
+#       tmux display 'Updating tpm and plugins...'
+#       (cd "$TMUX_PLUGIN_MANAGER_PATH/tpm" && git checkout -q master && git reset -q --hard HEAD && git pull -q origin master)
+#     fi
+#     if [ x"$install_tpm" = x"true" ] || [ x"$update_tpm" = x"true" ]; then
+#       perl -0777 -p -i -e 's/git clone --recursive/git clone --recursive --depth 1 --shallow-submodules/g
+#                           ;s/(install_plugin "\$plugin")\n(\s+)done/\1&\n\2done\n\2wait/g' "$TMUX_PLUGIN_MANAGER_PATH/tpm/scripts/install_plugins.sh"
+#       perl -p -i -e 's/git submodule update --init --recursive/git submodule update --init --recursive --depth 1/g' "$TMUX_PLUGIN_MANAGER_PATH/tpm/scripts/update_plugin.sh"
+#       tmux set-environment -g TMUX_PLUGIN_MANAGER_PATH "$TMUX_PLUGIN_MANAGER_PATH"
+#     fi
+#     if [ x"$update_tpm" = x"true" ]; then
+#       "$TMUX_PLUGIN_MANAGER_PATH/tpm/bin/update_plugins" all >/dev/null 2>&1
+#       tmux display 'Done updating tpm and plugins...'
+#     elif [ x"$install_tpm" = x"true" ]; then
+#       "$TMUX_PLUGIN_MANAGER_PATH/tpm/bin/install_plugins" >/dev/null 2>&1
+#       tmux display 'Done installing tpm and plugins...'
+#     fi
+#   else
+#     tmux display "GitHub doesn't seem to be reachable, skipping installing and/or updating tpm and plugins..."
 #   fi
-#   "$TMUX_PLUGIN_MANAGER_PATH/tpm/tpm"
+#
+#   [ -f "$TMUX_PLUGIN_MANAGER_PATH/tpm/tpm" ] && "$TMUX_PLUGIN_MANAGER_PATH/tpm/tpm"
 #   if [ -z "$window_active" ] && [ $_tmux_version -lt 240 ]; then
 #     tmux run -b "sleep $(expr $(tmux display -p '#{display-time}') / 500) && tmux set display-time 3000 \; display 'This configuration will soon require tmux 2.4+' \; set -u display-time"
 #   fi

.tmux.conf.local

@@ -347,6 +347,7 @@ tmux_conf_copy_to_os_clipboard=false
 # move status line to top
 #set -g status-position top
 
+
 # -- tpm -----------------------------------------------------------------------
 
 # while I don't use tpm myself, many people requested official support so here