diff options
Diffstat (limited to 'core/update')
| -rw-r--r-- | core/update | 70 |
1 files changed, 33 insertions, 37 deletions
diff --git a/core/update b/core/update index 8787754..686def2 100644 --- a/core/update +++ b/core/update @@ -2,25 +2,25 @@ [ "$skip_libraries" ] && return export now="$(date +%s.%N)" -# load current state -mkdir -p "$POMODORO_STATE_PATH" -load_or_init() { - property="$1" - default_value="$2" - property_path="$POMODORO_STATE_PATH/current/$property" - if [ -f "$property_path" ] ; then - eval $property='"$(cat "$property_path")"' - else - eval $property='$default_value' +# export state +state() { echo "$lap $running $time" ; } + +# load original_state once per invocation of dppt +if [ -z "$original_state" ] ; then + # import state + mkdir -p "$POMODORO_STATE_PATH" + if [ -e "$POMODORO_STATE_PATH/current" ] ; then + read -r lap running time < "$POMODORO_STATE_PATH/current" fi -} -[ -z "$lap" ] && load_or_init lap 0 -[ -z "$state" ] && load_or_init state 'reset' -[ -z "$time" ] && load_or_init time 0.0 -# save state (for diff) -diff_state() { printf '%s:' "$lap" "$state" "$time" ; } -original_state="$(diff_state)" + # ensure state variables are always initialized + lap=${lap:-0} + running=${running:-0} + time=${time:-0} + + # save original state (see save_state function) + original_state="$(state)" +fi # allow overriding this value manually [ -z "$update_time" ] && update_time=0 @@ -28,19 +28,18 @@ original_state="$(diff_state)" # calculate remaining time on timer if [ -z "$remaining" ] ; then remaining="$time" - [ "$state" = 'running' ] && remaining="$(echo "( $time - $now ) / 1" | bc)" + [ $running -eq 1 ] && remaining="$(echo "( $time - $now ) / 1" | bc)" fi # go to next lap if this timer expired -if [ "$state" = 'running' ] && [ "${remaining#-}" != "${remaining}" ] ; then +if [ $running -eq 1 ] && [ "${remaining#-}" != "${remaining}" ] ; then lap=$(( $lap + 1 )) state='paused' update_time=1 fi # update remaining time if in reset -[ "$state" = 'reset' ] && update_time=1 -[ "$time" = "0.0" ] && update_time=1 +[ $lap -eq 0 ] && [ $time = '0' ] && update_time=1 if [ $update_time -eq 1 ] ; then # skip_libraries is used to prevent endless loop (see top of this file) @@ -49,8 +48,9 @@ if [ $update_time -eq 1 ] ; then fi save_state() { + new_state="$(state)" # do not save files if state didn't change - [ "$original_state" = "$(diff_state)" ] && return + [ "$original_state" = "$new_state" ] && return # The state update needs to be atomic since other instances may access the # state during an update. This is accomplished by replacing a single symlink, @@ -58,34 +58,30 @@ save_state() { # complicated than a lockfile. $POMODORO_STATE_PATH contains three items: # # 1. current -- a symlink to `primary` or `secondary` - # 2. primary -- folder containing current state* - # 3. secondary -- temporary folder used write new state + # 2. primary -- file containing current state* + # 3. secondary -- temporary file used write new state # # * `primary` will only contain stale state during an update (i.e. while # `current` is pointing to `secondary`) - mkdir -p "$POMODORO_STATE_PATH/primary" "$POMODORO_STATE_PATH/secondary" - - echo "$lap" > "$POMODORO_STATE_PATH/secondary/lap" - echo "$state" > "$POMODORO_STATE_PATH/secondary/state" - echo "$time" > "$POMODORO_STATE_PATH/secondary/time" - - ln -sf "secondary" "$POMODORO_STATE_PATH/secondary/current" + # save state and create replacement symlink for `current` + echo "$new_state" > "$POMODORO_STATE_PATH/secondary" + ln -sf "secondary" "$POMODORO_STATE_PATH/current~" # this is the atomic update that replaces the `current` symlink with the new # state - mv "$POMODORO_STATE_PATH/secondary/current" "$POMODORO_STATE_PATH" + mv "$POMODORO_STATE_PATH/current~" "$POMODORO_STATE_PATH/current" - # next, replace the old `primary` state with the new state from `secondary`, + # next, replace the old `primary` state with the new state from `secondary` + cp "$POMODORO_STATE_PATH/secondary" "$POMODORO_STATE_PATH/primary" # and update the symlink a second time to now point to `primary` again (this # does not change the state) - cp -r "$POMODORO_STATE_PATH/secondary/." "$POMODORO_STATE_PATH/primary/" - ln -sf "primary" "$POMODORO_STATE_PATH/primary/current" - mv "$POMODORO_STATE_PATH/primary/current" "$POMODORO_STATE_PATH" + ln -sf "primary" "$POMODORO_STATE_PATH/current~" + mv "$POMODORO_STATE_PATH/current~" "$POMODORO_STATE_PATH/current" } # state variables -export lap state time +export lap running time # calculated variables export remaining |