Multi-line terminal commands

Beginner, Caché, Terminal

Let's say I have this simple script file try.script

write 1
write 0

I can execute it in a terminal (csession) by calling:

csession cache < try.script

And I get the following output:

%SYS>
1
%SYS>
0

However I want to use a try catch block in my script:

try {
write 1/0
catch {}
halt

But as script is executed line by line, it's interpreted like this:

%SYS>
TRY {
      ^
<SYNTAX>
%SYS>

WRITE 1/0
^
<DIVIDE>
%SYS>

CATCH {}
^
<SYNTAX>
%SYS>

I know that I can write it all in 1 line, but I'd rather not do that. Is there a way to feed multiline statement into Cache?

Answers

Answer by Bernard Buhagiar 6 July 2018

Why not put your code in a mac routine and call the routine from your script file. Might be easier.

Comment by Eduard Lebedyuk 6 July 2018

It's executed during container build, so to load something I need a script.

Answer by John Murray 6 July 2018

Make your script create an INT routine and run it. Example try.script below. Your lines of code either begin with the TAB character or with a label followed by TAB.

zr
    ; Test routine created by try.script file
    w !,"This is written by INT routine ",$t(+0)
    w !," which is created from a script injected to csession."
zs MyBootRoutine
d ^MyBootRoutine
; Clean up
zr  zs MyBootRoutine
h

+ 1

Comment by Eduard Lebedyuk 6 July 2018

Here's an output I get:

USER>

USER>

USER>

This is written by INT routine
USER>

 which is created from a script injected to csession.
USER>

USER>

D ^MyBootRoutine
^
<NOROUTINE> *MyBootRoutine
USER>

USER>

USER>

Looks like it's still line-by-line execution.

Comment by John Murray 6 July 2018

It worked for me (2017.2.2 on Windows):

C:\InterSystems\Ens172\bin>CSESSION ENS172 < c:\s\try.script

Node: TIN, Instance: ENS172

USER>zr

USER> ; Test routine created by try.script file

USER> w !,"This is written by INT routine ",$t(+0)

USER> w !," which is created from a script injected to csession."

USER>zs MyBootRoutine

USER>d ^MyBootRoutine

This is written by INT routine MyBootRoutine
 which is created from a script injected to csession.
USER>; Clean up

USER>zr  zs MyBootRoutine

USER>h

C:\InterSystems\Ens172\bin>

Maybe your indented script lines (the ones to insert into the routine) aren't starting with $C(9)

+ 1

Comment by Eduard Lebedyuk 6 July 2018

Thank you, missed the TABs.

Answer by Vitaliy Serdtsev 6 July 2018

Contents of a Script File:

Script files are line oriented; there is no line-continuation convention. Each line is separate from any other. Lines beginning with a semicolon are considered comments. You can use blank lines liberally to improve readability. Normally, invalid lines are ignored. Script commands may be preceded by spaces and/or tabs.

Multi-line terminal commands

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