How to do PHP "require()" or TCL "source" in bash script

[Phil Powell]

I'm sorry but I can't figure out how to explain this any better than
this.

In PHP we have a command "require()" that obtains a file and logically
places it into another file.

I cannot figure out how to do this in bash script as the requirement
is necessary for a migration script to obtain the code from a .cfg
file and then be able for the "parent" script to run the code it
"imported" from the .cfg file, much like PHP's require() or TCL's
"source".

This is what I have so far and it fails:

if [ -f ivc.cfg ]; then
cat ivc.cfg
fi

Anyone really know bash script well please help, it's a barrier for me
not to be able to get just this one piece working.

Thanx
Phil

[Davide Bianchi]

Re: How to do PHP "require() " or TCL "source&qu ot; in bash script

In comp.os.linux.m isc Phil Powell <soazine@erols. com> wrote:[color=blue]
> In PHP we have a command "require()" that obtains a file and logically
> places it into another file.[/color]

Isn't the same as the $include ?

Davide

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[Gary L. Burnore]

Re: How to do PHP &quot;require() &quot; or TCL &quot;source&qu ot; in bash script

On 9 Jul 2004 20:32:14 GMT, Davide Bianchi
<davideyeahsure @onlyforfun.net > wrote:
[color=blue]
>In comp.os.linux.m isc Phil Powell <soazine@erols. com> wrote:[color=green]
>> In PHP we have a command "require()" that obtains a file and logically
>> places it into another file.[/color]
>
>Isn't the same as the $include ?[/color]

Almost.

require() does the same thing include() does with the difference being
if include() fails the script can still continue. If require() fails,
the script must end.

There's also include_once() and require_once() with the same
capabilities as their non _once'd countrparts and the nicly added
feature of not reloading the same require or include more than once.


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[Chris F.A. Johnson]

Re: How to do PHP &quot;require() &quot; or TCL &quot;source&qu ot; in bash script

["Followup-To:" header set to comp.os.linux.m isc.]
On 2004-07-09, Phil Powell wrote:[color=blue]
> I'm sorry but I can't figure out how to explain this any better than
> this.
>
> In PHP we have a command "require()" that obtains a file and logically
> places it into another file.
>
> I cannot figure out how to do this in bash script as the requirement
> is necessary for a migration script to obtain the code from a .cfg
> file and then be able for the "parent" script to run the code it
> "imported" from the .cfg file, much like PHP's require() or TCL's
> "source".[/color]

What's wrong with bash's "source" command?

[ -f ivc.cfg ] && source ivc.cfg

Or is that not what you want?
[color=blue]
> This is what I have so far and it fails:
>
> if [ -f ivc.cfg ]; then
> cat ivc.cfg
> fi[/color]

What do you mean, "fail"? Your snippet will do exactly what it is
written to do: send the contents of ivc.cfg to stdout.
[color=blue]
> Anyone really know bash script well please help, it's a barrier for me
> not to be able to get just this one piece working.[/color]

The source command will only work if the contents of the cg file
are a valid shell script, e.g., "variable=value ". Otherwise, you
will have to parse the file:

[ -f ivc.cfg ] && while read -r line
do
: parse each line here; code depends on format of the line
done < ivc.cfg

--
Chris F.A. Johnson http://cfaj.freeshell.org/shell
=============== =============== =============== =============== =======
My code (if any) in this post is copyright 2004, Chris F.A. Johnson
and may be copied under the terms of the GNU General Public License

[Andy Fraser]

Re: How to do PHP &quot;require() &quot; or TCL &quot;source&qu ot; in bash script

In comp.os.linux.m isc, Phil Powell uttered these immortal words:
[color=blue]
> In PHP we have a command "require()" that obtains a file and logically
> places it into another file.
>
> I cannot figure out how to do this in bash script as the requirement
> is necessary for a migration script to obtain the code from a .cfg
> file and then be able for the "parent" script to run the code it
> "imported" from the .cfg file, much like PHP's require() or TCL's
> "source".
>
> This is what I have so far and it fails:
>
> if [ -f ivc.cfg ]; then
> cat ivc.cfg
> fi[/color]

I'm no bash script expert but I get by. I would say that that's along the
right lines. This works for me:

[ -f ivc.cfg ] || exit 1
.. ivc.cfg

If the file's not there the script exits with a value of 1 otherwise it
reads and executes ivc.cfg.

Then there's:

if [ -f ivc.cfg ]
then
. ivc.cfg
else
echo "Required file not found."
exit 1
fi

If the file's not there the script prints a message and exits with a value
of 1 otherwise it reads and executes ivc.cfg.

--
Andy.

[Davide Bianchi]

Re: How to do PHP &quot;require() &quot; or TCL &quot;source&qu ot; in bash script

In comp.os.linux.m isc Gary L. Burnore <gburnore@datab asix.com> wrote:[color=blue][color=green]
>>Isn't the same as the $include ?[/color]
> Almost.
> require() does the same thing include() does with the difference being[/color]

No, no. I was talking about the $include in a bash script. Not in PHP.

Davide

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