Add tmux-continuum status plugin

INSTALL.md

@@ -318,4 +318,22 @@ Set the label when there is one client, or more than one client
 ```bash
 set -g @dracula-clients-singular client
 set -g @dracula-clients-plural clients
-```
+```
+
+#### continuum options
+
+Set the output mode. Options are:
+- **countdown**: Show a T- countdown to the next save (default)
+- **time**: Show the time since the last save
+- **alert**: Hide output if no save has been performed recently
+- **interval**: Show the continuum save interval
+
+```bash
+set -g @dracula-continuum-mode countdown
+```
+
+Show if the last save was performed less than 60 seconds ago (default threshold is 15 seconds)
+
+```bash
+set -g @dracula-continuum-time-threshold 60
+```

README.md

@@ -35,6 +35,7 @@ Configuration and options can be found at [draculatheme.com/tmux](https://dracul
 - Info if the Panes are synchronized
 - Spotify playback (needs the tool spotify-tui installed)
 - Current kubernetes context
+- Countdown to tmux-continuum save
 - Current working directory of tmux pane
 
 ## Compatibility

scripts/continuum.sh

@@ -0,0 +1,161 @@
+#!/usr/bin/env bash
+# setting the locale, some users have issues with different locales, this forces the correct one
+export LC_ALL=en_US.UTF-8
+
+# configuration
+# @dracula-continuum-mode default (countdown|time|alert|interval)
+# @dracula-continuum-time-threshold 15
+
+alert_mode="@dracula-continuum-mode"
+time_threshold="@dracula-continuum-time-threshold"
+warn_threshold=360
+first_save="@dracula-continuum-first-save"
+
+# tmux-resurrect and tmux-continuum options
+if [ -d "$HOME/.tmux/resurrect" ]; then
+  default_resurrect_dir="$HOME/.tmux/resurrect"
+else
+  default_resurrect_dir="${XDG_DATA_HOME:-$HOME/.local/share}"/tmux/resurrect
+fi
+resurrect_dir_option="@resurrect-dir"
+last_auto_save_option="@continuum-save-last-timestamp"
+auto_save_interval_option="@continuum-save-interval"
+auto_save_interval_default="15"
+
+current_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source $current_dir/utils.sh
+
+current_timestamp() {
+  echo "$(date +%s)"
+}
+
+file_mtime() {
+  if [ ! -f "$1" ]; then
+    echo -1
+    return
+  fi
+  case $(uname -s) in
+    Linux|Darwin)
+      date -r "$1" +%s
+      ;;
+
+    FreeBSD)
+      stat -f %m "$1"
+      ;;
+
+    CYGWIN*|MINGW32*|MSYS*|MINGW*)
+      # TODO - windows compatability
+      ;;
+  esac
+}
+
+timestamp_date() {
+  case $(uname -s) in
+    Linux)
+      date -d "@$1" "$2"
+      ;;
+
+    Darwin|FreeBSD)
+      date -r "$1" "$2"
+      ;;
+
+    CYGWIN*|MINGW32*|MSYS*|MINGW*)
+      # TODO - windows compatability
+      ;;
+  esac
+}
+
+set_tmux_option() {
+  local option="$1"
+  local value="$2"
+  tmux set-option -gq "$option" "$value"
+}
+
+# tmux-resurrect dir
+resurrect_dir() {
+  if [ -z "$_RESURRECT_DIR" ]; then
+    local path="$(get_tmux_option "$resurrect_dir_option" "$default_resurrect_dir")"
+    # expands tilde, $HOME and $HOSTNAME if used in @resurrect-dir
+    echo "$path" | sed "s,\$HOME,$HOME,g; s,\$HOSTNAME,$(hostname),g; s,\~,$HOME,g"
+  else
+    echo "$_RESURRECT_DIR"
+  fi
+}
+_RESURRECT_DIR="$(resurrect_dir)"
+
+last_resurrect_file() {
+  echo "$(resurrect_dir)/last"
+}
+
+last_saved_timestamp() {
+  local last_saved_timestamp="$(get_tmux_option "$last_auto_save_option" "")"
+  local first_save_timestamp="$(get_tmux_option "$first_save" "")"
+  # continuum sets the last save timestamp to the current time on first load if auto_save_option is not set
+  # so we can outrace it and detect that last_uato_save_option is empty and the timestamp is a dummy save
+  if [ -z "$first_save_timestamp" ]; then
+    last_saved_timestamp="$(file_mtime "$(last_resurrect_file)")" || last_saved_timestamp=-1
+    set_tmux_option "$first_save" "$last_saved_timestamp"
+  elif [ "$first_save_timestamp" != "done" ]; then
+    last_saved_timestamp="$(file_mtime "$(last_resurrect_file)")" || last_saved_timestamp=-1
+    if [ "$last_saved_timestamp" -gt "$first_save_timestamp" ]; then
+      set_tmux_option "$first_save" "done"
+    else
+      last_saved_timestamp="$first_save_timestamp"
+    fi
+  fi
+  echo "$last_saved_timestamp"
+}
+
+print_status() {
+  local mode="$(get_tmux_option "$alert_mode" "countdown")"
+  local info_threshold="$(get_tmux_option "$time_threshold" "15")"
+  local save_int="$(get_tmux_option "$auto_save_interval_option" "$auto_save_interval_default")"
+  local interval_seconds="$((save_int * 60))"
+  local status=""
+  local last_timestamp="$(last_saved_timestamp)"
+  local time_delta="$(($(current_timestamp) - last_timestamp))"
+  local time_delta_minutes="$((time_delta / 60))"
+
+  if [[ $save_int -gt 0 ]]; then
+    if [[ "$time_delta" -gt $((interval_seconds + warn_threshold)) ]]; then
+      if [[ "$last_timestamp" == -1 ]]; then
+        status="no save"
+      else
+        status="last save: $(timestamp_date "$last_timestamp" '+%F %T')"
+      fi
+      if [[ "$mode" == "countdown" ]]; then
+        # continuum timestamp may be different than file timestamp on first load
+        local last_continuum_timestamp="$(get_tmux_option "$last_auto_save_option" "")"
+        time_delta="$(($(current_timestamp) - last_continuum_timestamp))"
+        time_delta_minutes="$((time_delta / 60))"
+
+        status="$status; T$(printf '%+d' "$((time_delta_minutes - save_int))")min"
+      fi
+    elif [[ "$time_delta" -le "$info_threshold" ]]; then
+      status="saved"
+    else
+      case "$mode" in
+        countdown)
+          status="T$(printf '%+d' "$((time_delta_minutes - save_int))")min";
+          ;;
+
+        time)
+          status="$time_delta_minutes";
+          ;;
+
+        alert)
+          status=""
+          ;;
+
+        interval)
+          status="$save_int"
+          ;;
+      esac
+    fi
+  else
+    status="off"
+  fi
+
+  echo "$status"
+}
+print_status

scripts/dracula.sh

@@ -212,6 +212,10 @@ main()
       IFS=' ' read -r -a colors <<<$(get_tmux_option "@dracula-terraform-colors" "light_purple dark_gray")
       script="#($current_dir/terraform.sh $terraform_label)"
 
+    elif [ $plugin = "continuum" ]; then
+      IFS=' ' read -r -a colors <<<$(get_tmux_option "@dracula-continuum-colors" "cyan dark_gray")
+      script="#($current_dir/continuum.sh)"
+
     elif [ $plugin = "weather" ]; then
       IFS=' ' read -r -a colors <<< $(get_tmux_option "@dracula-weather-colors" "orange dark_gray")
       script="#($current_dir/weather_wrapper.sh $show_fahrenheit $show_location $fixed_location)"