zimfw/src/stage2/50_zimfw_upgrade.zsh.erb

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_zimfw_upgrade() {
local -r ztarget=${ZIM_HOME}/zimfw.zsh zurl=https://github.com/zimfw/zimfw/releases/latest/download/zimfw.zsh.gz
{
if (( ${+commands[curl]} )); then
command curl -fsSL -o ${ztarget}.new.gz ${zurl} || return 1
else
local zopt
if (( _zprintlevel <= 1 )) zopt=-q
if ! command wget -nv ${zopt} -O ${ztarget}.new.gz ${zurl}; then
if (( _zprintlevel <= 1 )); then
print -u2 -PR "%F{red}<%= failed %>Failed to download %B${zurl}%b. Use %B-v%b option to see details.%f"
fi
return 1
fi
fi
command gunzip -f ${ztarget}.new.gz || return 1
# .latest_version can be outdated and will yield a false warning if zimfw is
# upgraded before .latest_version is refreshed. Bad thing about having a cache.
_zimfw_mv ${ztarget}{.new,} && command rm -f ${ZIM_HOME}/.latest_version && \
_zimfw_print -P '<%= done %>Done with upgrade.'
} always {
command rm -f ${ztarget}.new{,.gz}
}
}