Merging fancy bash prompt

1 files changed, 85 insertions, 0 deletions

diff --git a/.bashprompt b/.bashprompt
new file mode 100644
index 0000000..295a0f3
--- /dev/null
+++ b/.bashprompt
@@ -0,0 +1,85 @@
+# Based on the brilliant https://redandblack.io/blog/2020/bash-prompt-with-updating-time/
+
+NEWLINE="\n"
+SINGLE_SPACE=" "
+PRINTING_OFF="\["
+PRINTING_ON="\]"
+RESTORE_CURSOR_POSITION="\e[u"
+SAVE_CURSOR_POSITION="\e[s"
+
+NON_COLOUR="$(tput sgr0)"
+DEF_COLOUR="$(tput setaf 240)"
+TIM_COLOUR="$(tput bold)$(tput setaf 32)"
+DIR_COLOUR="$(tput bold)$(tput setaf 201)"
+ERR_COLOUR="$(tput setaf 9)"
+DOL_COLOUR="$(tput rev)$(tput setaf 34)"
+VCS_COLOUR="$(tput setaf 214)"
+
+HOST="\H:"
+PS2_PROMPT=">"
+DIRECTORY="\w"
+TIMESTAMP="date +%m/%H.%M"
+
+move_cursor_to_start_of_ps1() {
+    command_rows=$(history 1 | wc -l)
+    if [ "$command_rows" -gt 1 ]; then
+        let vertical_movement=$command_rows+1
+    else
+        command=$(history 1 | sed 's/^\s*[0-9]*\s*//')
+        command_length=${#command}
+        ps1_prompt_length=${#PS1_PROMPT}
+        let total_length=$command_length+$ps1_prompt_length
+        let lines=$total_length/${COLUMNS}+1
+        let vertical_movement=$lines
+    fi
+    tput cuu $vertical_movement
+}
+
+PS0_ELEMENTS=(
+    "$SAVE_CURSOR_POSITION" "\$(move_cursor_to_start_of_ps1)"
+    "(" "$TIM_COLOUR" "\$($TIMESTAMP)" "$NON_COLOUR" ")" "$RESTORE_CURSOR_POSITION"
+)
+PS0=$(IFS=; echo "${PS0_ELEMENTS[*]}")
+
+set_ps1_prompt() {
+    local rval=$?;
+
+    local PS1_SYMBOL="#";
+    (( $(id -u) )) && PS1_SYMBOL=\$;
+
+    if (( $rval )); then
+        local PROMPT_COLOUR="$(tput rev)$ERR_COLOUR"
+        local ERROR_ELEMENTS=(
+            "$PRINTING_OFF" "$ERR_COLOUR" "$PRINTING_ON"
+            "<$rval>"
+            "$PRINTING_OFF" "$DEF_COLOUR" "$PRINTING_ON"
+        )
+        local ERROR_VALUE=$(IFS=; echo "${ERROR_ELEMENTS[*]}")
+    else
+        local PROMPT_COLOUR="$DOL_COLOUR"
+        local ERROR_VALUE=""
+    fi
+    PS1_ELEMENTS=(
+        "(" "$PRINTING_OFF" "$DEF_COLOUR" "$PRINTING_ON" "\$($TIMESTAMP)"
+        "$PRINTING_OFF" "$NON_COLOUR" "$PRINTING_ON" ")" "[" "$HOST"
+        "$PRINTING_OFF" "$DIR_COLOUR" "$PRINTING_ON" "$DIRECTORY"
+        "$PRINTING_OFF" "$NON_COLOUR" "$PRINTING_ON" "]"
+        "$PRINTING_OFF" "$VCS_COLOUR" "$PRINTING_ON" "\$(vcs)"
+        "$ERROR_VALUE"
+        "$PRINTING_OFF" "$PROMPT_COLOUR" "$PRINTING_ON" "$PS1_SYMBOL"
+        "$PRINTING_OFF" "$NON_COLOUR" "$PRINTING_ON" "$SINGLE_SPACE"
+    )
+    PS1=$(IFS=; echo "${PS1_ELEMENTS[*]}")
+}
+
+PROMPT_COMMAND=set_ps1_prompt
+
+PS2_ELEMENTS=(
+    "$PRINTING_OFF" "$PROMPT_COLOUR" "$PRINTING_ON" "$PS2_PROMPT"
+    "$SINGLE_SPACE" "$PRINTING_OFF" "$NON_COLOUR" "$PRINTING_ON"
+)
+PS2=$(IFS=; echo "${PS2_ELEMENTS[*]}")
+
+shopt -s histverify
+
+PS4='[$EPOCHREALTIME]'