Updates to .bashrc for variable-length prompt, tmux conf.

.bashrc

@@ -7,7 +7,7 @@ prompt_command() {
     local retval=$?
     local branch="";
     local clean="";
-    local workingDir="";
+    local cols=$COLUMNS
 
     local numcolor="\[\e[0;33m\]"
     local red="\[\e[0;31m\]"
@@ -22,40 +22,47 @@ prompt_command() {
         numcolor="\[\e[1;41;33m\]"
     fi
 
-    # If we're in a git repo
     if git branch &>/dev/null; then
-
-        local repoDir=`git rev-parse --show-toplevel`
         branch="$green$(git branch 2>/dev/null | grep \* | cut -d ' ' -f 2-)"
         clean=$(git status | grep clean)
-        # if [ -z "$clean" ]; then clean="${red}✗"; else clean=""; fi
-        if [ -z "$clean" ]; then clean="${red}++"; else clean=""; fi
+        if [ -z "$clean" ]; then clean="${red}✗"; else clean=""; fi
+    fi
 
-        workingDir="$(basename ${repoDir})/"
-        workingDir+=`realpath "--relative-to=${repoDir}" "$(pwd)"`
+    userHost="${debian_chroot:+($debian_chroot)}$numcolor\!$red \u$sepcolor@${brightblue}\h${default}:${branch}${clean}"
+    userHostExp="${debian_chroot:+($debian_chroot)}\! \u@\h:${branch}${clean}"
+    userHostExp=${userHostExp@P}
+
+    wrkDir="$default\w$green"
+    wrkDirExp="\w"
+    wrkDirExp=${wrkDirExp@P}
+
+    userPrompt="\$${default}"
+
+    if (( ${#userHostExp} + ${#wrkDirExp} < $cols - 20 )); then
+      # We can fit everything on one line
+      # echo "Oneline: $((${#userHostExp} + ${#wrkDirExp})) < $(($cols - 20))"
+      PS1="${userHost} ${wrkDir}${userPrompt} "
+    elif (( ${#userHostExp} + ${#wrkDirExp} < $cols + 6 )); then
+      # We just need to put the prompt on it's own line
+      # echo "Twoline: $((${#userHostExp} + ${#wrkDirExp})) < $(($cols + 6))"
+      PS1="\n${userHost} ${wrkDir}\n${userPrompt} "
     else
-        workingDir=`pwd`
+      # We need to put the userHost on it's own line
+      PS1="\n${userHost}\n"
+
+      if (( ${#wrkDirExp} < $cols - 20 )); then
+        # We can fit the prompt and working dir on one line
+        # echo "Twoline2: $(( ${#wrkDirExp} )) < $(($cols - 20 ))"
+        PS1+="${wrkDir}${userPrompt} "
+      else
+        # We have to put the prompt on it's own line
+        # echo "Threeline"
+        PS1+="${wrkDir}\n${userPrompt} "
+      fi
     fi
 
-    PS1="$numcolor\!$red \u$sepcolor@${brightblue}\h${default}:${branch}${clean} "
-
-    # Add a linebreak if the branchname + working dir will make the line
-    # overly long
-    # echo "Branch and working dir length is $(expr ${#branch} + ${#workingDir})"
-    # echo "COLUMNS is $COLUMNS. COLUMNS / 3 is $(expr $COLUMNS / 3)"
-    if (( $(expr ${#branch} + ${#workingDir}) > $(expr $COLUMNS / 3) )); then
-      PS1="\r\n${PS1}\r\n"
-    fi
-
-    PS1+="$default$workingDir"
-
-    # If the working dir is itself too long, put it on it's own line and put
-    # the prompt below it.
-    if (( ${#workingDir} > $(expr $COLUMNS / 3) )); then PS1+="\r\n"; fi
-
-    PS1+="$green\$${default} "
-
-    # PS1="$numcolor\!$red \u$sepcolor@${brightblue}\h${default}:${branch}${clean} $default\w$green\$${default} "
+    unset clean numcolor branch retval cols
+    unset userHost userHostExp wrkDir wrkDirExp userPrompt userPromptExp
 }
 
 PROMPT_COMMAND=prompt_command

.tmux.conf

@@ -14,10 +14,13 @@ set -g history-limit 5000
 set -g status-bg black
 set -g status-fg white
 set -g status-justify centre
-set -g status-left '#[fg=green][ #[fg=blue,bright]jdb-hp#[fg=green,nobright] ]['
+set -g status-left '#[fg=green][ #[fg=magenta]jdb-mg-element-win10#[fg=green,nobright] ]['
 set -g status-left-length 70
 set -g status-right '#[fg=green]][ #[fg=brightblue]%m-%d #[fg=brightgreen]%H:%M #[fg=green]]'
 set -g status-right-length 20
 set -g repeat-time 0
 
+# Always create the main window group and session if it doesn't exist. Then,
+# use tmux new-session -t main to create new sessions that attach to this
+# existing window group.
 new-session -s main