Differents colors for differents hosts you SSH in

Adds the LP_ENABLE_SSH_COLORS option to use a numeric hash of the hostname as the displayed color.

README.md

@@ -26,9 +26,9 @@ in a git repository on a server, at branch "myb":
 
 `1r [user@server:~/liquidprompt] myb ± `
 
-A liquid prompt displaying everything may look like this:
+A liquid prompt displaying everything (a rare event!) may look like this:
 
-`⌁24% ⌂42% 3d/2&/1z [user@server:~/ … /code/liquidprompt]↥ master(+10/-5,3)* 125 ± `
+`code ⌁24% ⌂42% 3d/2&/1z [user@server:~/ … /code/liquidprompt]↥ master(+10/-5,3)*+ 125 ± `
 
 It displays:
 
@@ -48,9 +48,9 @@ any;
 terminal multiplexer (screen or tmux);
 * the current user, in bold yellow if it is root, in light white if it is not
 the same as the login user;
-* a blue @ if the connection has X11 support;
+* a green @ if the connection has X11 support, a yellow one if not;
-* the current host, if you are connected via an SSH or telnet connection, with
+* the current host, if you are connected via a telnet connection (in bold red)
-different colors for each case;
+or SSH (either a blue hostname or differents colors for different hosts);
 * a green colon if the user has write permissions on the current directory,
 a red one if he has not;
 * the current directory in bold, shortened if it takes too much space, while
@@ -58,7 +58,7 @@ preserving the first two directories;
 * the current Python virtual environment, if any;
 * an up arrow if an HTTP proxy is in use;
 * the name of the current branch if you are in a version control repository
-(git, mercurial, subversion or fossil), in green if everything is up
+(git, mercurial, subversion, bazaar or fossil), in green if everything is up
 to date, in red if there is changes, in yellow if there is pending
 commits to push;
 * the number of added/deleted lines (git) or files (fossil), if
@@ -138,6 +138,7 @@ building:
 * `LP_ENABLE_VCS_ROOT`, if you want to show VCS informations with root account
 * `LP_ENABLE_TITLE`, if you want to use the prompt as your terminal window's title
 * `LP_ENABLE_SCREEN_TITLE`, if you want to use the prompt as your screen window's title
+* `LP_ENABLE_SSH_COLORS`, if you want different colors for hosts you SSH in
 
 Note that if required commands are not installed, enabling the
 corresponding feature will have no effect.

liquidprompt

@@ -216,6 +216,7 @@ _lp_source_config()
     LP_ENABLE_VCS_ROOT=${LP_ENABLE_VCS_ROOT:-0}
     LP_ENABLE_TITLE=${LP_ENABLE_TITLE:-0}
     LP_ENABLE_SCREEN_TITLE=${LP_ENABLE_SCREEN_TITLE:-0}
+    LP_ENABLE_SSH_COLORS=${LP_ENABLE_SSH_COLORS:-0}
     LP_DISABLED_VCS_PATH=${LP_DISABLED_VCS_PATH:-""}
 
     LP_MARK_BATTERY=${LP_MARK_BATTERY:-"⌁"}
@@ -384,7 +385,20 @@ lcl)
     fi
     ;;
 ssh)
-    LP_HOST="${LP_HOST}${LP_COLOR_SSH}${_LP_HOST_SYMBOL}${NO_COL}"
+    # If we want a different color for each host
+    if [[ "$LP_ENABLE_SSH_COLORS" ]]; then
+        # compute the hash of the hostname
+        # and get the corresponding number in [1-6] (red,green,yellow,blue,purple or cyan)
+        # FIXME check portability of cksum and add more formats (bold? 256 colors?)
+        hash=$(( 1 + $(hostname | cksum | cut -d " " -f 1) % 6 ))
+        color=${_LP_OPEN_ESC}$(ti_setaf $hash)${_LP_CLOSE_ESC}
+        LP_HOST="${LP_HOST}${color}${_LP_HOST_SYMBOL}${NO_COL}"
+        unset hash
+        unset color
+    else
+        # the same color for all hosts
+        LP_HOST="${LP_HOST}${LP_COLOR_SSH}${_LP_HOST_SYMBOL}${NO_COL}"
+    fi
     ;;
 tel)
     LP_HOST="${LP_HOST}${LP_COLOR_TELNET}${_LP_HOST_SYMBOL}${NO_COL}"

liquidpromptrc-dist

@@ -100,6 +100,9 @@ LP_ENABLE_TITLE=0
 # Enable Title for screen and byobu
 LP_ENABLE_SCREEN_TITLE=0
 
+# Use differents colors for differents hosts you SSH in
+LP_ENABLE_SSH_COLORS=0
+
 # Specify a list of complete and colon (":") separated paths in which, all vcs
 # will be disabled
 LP_DISABLED_VCS_PATH=""