RE: Processing Arguments

RE: Processing Arguments

[danielwallace]

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Try looking up zparseopts. It is along the same lines as bush's getopts.

Daniel


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-------- Original message --------
From: TJ Luoma <luomat@gmail.com>
Date: 12/03/2013  4:47 PM  (GMT-06:00)
To: Zsh-Users List <zsh-users@zsh.org>
Subject: Processing Arguments

I'm sure there has to be a better way of doing this, but the way that I've done it has always worked for me, so I've never bothered to look further.

Here's what I do:


    ANOTHER=no
    SOMETHING=no

    for ARGS in "$@"
    do
        case "$ARGS" in
            -s|--something)
                    SOMETHING=yes
                    shift
            ;;

            -a|--another)
                    ANOTHER=yes
                    shift
            ;;

            -*|--*)
                    echo "  $NAME [warning]: Don't know what to do with arg: $1"
                    shift
            ;;

        esac

    done # for args

The only downside to this is that you can't combine arguments such as `-sa` you have to use `-s -a`

Am I right? Is there a better way?

TjL

ps - I'm not _overly_ concerned with "portability" to other shells. I write zsh scripts because I like what zsh has to offer.

Re: Processing Arguments

[Bart Schaefer]

On Dec 3,  4:49pm, danielwallace wrote:
} 
} Try looking up zparseopts. It is along the same lines as bush's getopts.

Is "bush" a typo, or yet another shell I've never heard of?

zsh has "getopts" as well as "zparseopts".  The syntax of zparseopts is
a bit harder to understand, but it loops over the entire argument list
for you and stuffs values into arrays or associative arrays, whereas
with getopts you write your own loop (usually "while getopts ...").

Processing Arguments

[TJ Luoma]

I'm sure there has to be a better way of doing this, but the way that I've done it has always worked for me, so I've never bothered to look further.

Here's what I do:


    ANOTHER=no
    SOMETHING=no 

    for ARGS in "$@"
    do 
        case "$ARGS" in 
            -s|--something)
                    SOMETHING=yes
                    shift
            ;;

            -a|--another)
                    ANOTHER=yes
                    shift
            ;;

            -*|--*)
                    echo "  $NAME [warning]: Don't know what to do with arg: $1"
                    shift
            ;;

        esac

    done # for args 

The only downside to this is that you can't combine arguments such as `-sa` you have to use `-s -a`

Am I right? Is there a better way?

TjL

ps - I'm not _overly_ concerned with "portability" to other shells. I write zsh scripts because I like what zsh has to offer.