dotfiles/zsh/.oh-my-zsh/tools/check_for_upgrade.sh

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# Migrate .zsh-update file to $ZSH_CACHE_DIR
if [[ -f ~/.zsh-update && ! -f "${ZSH_CACHE_DIR}/.zsh-update" ]]; then
mv ~/.zsh-update "${ZSH_CACHE_DIR}/.zsh-update"
fi
# Cancel update if:
# - the automatic update is disabled.
# - the current user doesn't have write permissions nor owns the $ZSH directory.
# - git is unavailable on the system.
if [[ "$DISABLE_AUTO_UPDATE" = true ]] \
|| [[ ! -w "$ZSH" || ! -O "$ZSH" ]] \
|| ! command -v git &>/dev/null; then
return
fi
function current_epoch() {
zmodload zsh/datetime
echo $(( EPOCHSECONDS / 60 / 60 / 24 ))
}
function update_last_updated_file() {
echo "LAST_EPOCH=$(current_epoch)" >! "${ZSH_CACHE_DIR}/.zsh-update"
}
function update_ohmyzsh() {
ZSH="$ZSH" sh "$ZSH/tools/upgrade.sh"
update_last_updated_file
}
() {
emulate -L zsh
local epoch_target mtime option LAST_EPOCH
# Remove lock directory if older than a day
zmodload zsh/datetime
zmodload -F zsh/stat b:zstat
if mtime=$(zstat +mtime "$ZSH/log/update.lock" 2>/dev/null); then
if (( (mtime + 3600 * 24) < EPOCHSECONDS )); then
command rm -rf "$ZSH/log/update.lock"
fi
fi
# Check for lock directory
if ! command mkdir "$ZSH/log/update.lock" 2>/dev/null; then
return
fi
# Remove lock directory on exit. `return 1` is important for when trapping a SIGINT:
# The return status from the function is handled specially. If it is zero, the signal is
# assumed to have been handled, and execution continues normally. Otherwise, the shell
# will behave as interrupted except that the return status of the trap is retained.
trap "command rm -rf '$ZSH/log/update.lock'; return 1" EXIT INT QUIT
# Create or update .zsh-update file if missing or malformed
if ! source "${ZSH_CACHE_DIR}/.zsh-update" 2>/dev/null || [[ -z "$LAST_EPOCH" ]]; then
update_last_updated_file
return
fi
# Number of days before trying to update again
epoch_target=${UPDATE_ZSH_DAYS:-13}
# Test if enough time has passed until the next update
if (( ( $(current_epoch) - $LAST_EPOCH ) < $epoch_target )); then
return
fi
# Ask for confirmation before updating unless disabled
if [[ "$DISABLE_UPDATE_PROMPT" = true ]]; then
update_ohmyzsh
else
# input sink to swallow all characters typed before the prompt
# and add a newline if there wasn't one after characters typed
while read -t -k 1 option; do true; done
[[ "$option" != ($'\n'|"") ]] && echo
echo -n "[oh-my-zsh] Would you like to update? [Y/n] "
read -r -k 1 option
[[ "$option" != $'\n' ]] && echo
case "$option" in
[yY$'\n']) update_ohmyzsh ;;
[nN]) update_last_updated_file ;;
esac
fi
}
unset -f current_epoch update_last_updated_file update_ohmyzsh