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From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <1031022153151.ZM5274@candle.brasslantern.com>
Date: Wed, 22 Oct 2003 15:31:51 +0000
In-Reply-To: <1031009172754.ZM10491@candle.brasslantern.com>
Comments: In reply to Bart Schaefer <schaefer@brasslantern.com>
        "Useful zsh/datetime things" (Oct  9,  5:27pm)
References: <1031009172754.ZM10491@candle.brasslantern.com>
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To: zsh-users@sunsite.dk
Subject: Re: Useful zsh/datetime things
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On Oct 9,  5:27pm, Bart Schaefer wrote:
}
} function rfcdate {
}   # Like GNU "date -R"
}   strftime "%a, %e %b %Y %H:%M:%S %z" $EPOCHSECONDS
} }

As this doesn't work without a version of strftime that supports the
nonstandard "%z", here's a replacement:

function rfcdate {
    # As much like GNU "date -R" as possible
    if [[ ${(%):-"%D{%z}"} == [-+]<-> ]]
    then strftime "%a, %e %b %Y %H:%M:%S %z" $EPOCHSECONDS
    else strftime "%a, %e %b %Y %H:%M:%S %Z" $EPOCHSECONDS
    fi
}

The quotes around "%D{%z}" are necessary lest zsh interpret the first
closing brace as the end of the parameter substitution (leaving a stray
second closing brace which becomes part of the comparison).  This does
not seem to be the behavior of other shells -- e.g., bash balances all
nested braces.