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I need help with a Basic script (please)

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I'm trying to run a script to check first if a file is already on the mac I want it to quit, and if the file is not on the mac to go ahead and install it.

At the moment I have a policy that copy the file to /tmp/CB/file.pkg than it gets installed.
( file.pkg gets installed into "/Applications/file.pkg")
But I want it to skip install if the file.pkg is already installed on the "/Applications/file.pkg"

I told you it was basic =)

this is what I have so far:

#!/bin/sh
installer -pkg /tmp/CB/file.pkg -target /

Best answer by lkrasno

Many examples available online for "bash if" (and other conditional statements) 

#!/bin/bash

pkgDir="/tmp/CB/file.pkg"

if [ -d $pkgDir ]; then 
    do this 
else
    do that 
fi
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    7 replies

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    • lkrasno
    • Contributor
    • 80 replies
    • Answer
    • December 5, 2016

    Many examples available online for "bash if" (and other conditional statements) 

    #!/bin/bash

pkgDir="/tmp/CB/file.pkg"

if [ -d $pkgDir ]; then 
    do this 
else
    do that 
fi
    S
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    • scentsy
    • Author
    • Contributor
    • 49 replies
    • December 5, 2016

    that was fast! thank you.
    one last question I want it to exit if the file is on the /tmp/CD/file.pkg and install if its not there....does the "exit" looks correct? (do I need a "exit 0" or "exit 1")?

    thank you very much! 

    #!/bin/bash

pkgDir="/tmp/CB/file.pkg"

if [ -d $pkgDir ]; then 
    exit
else
   installer -pkg /tmp/CB/file.pkg -target /
fi
    L
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    • lkrasno
    • Contributor
    • 80 replies
    • December 5, 2016

    You're on the right track, and yes, ideally you'll want to use the appropriate exit code

    S
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    • scentsy
    • Author
    • Contributor
    • 49 replies
    • December 5, 2016

    got it thank you again!

    donmontalvo
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    • donmontalvo
    • Legendary Contributor
    • 4293 replies
    • December 6, 2016

    Would probably use -e unless that's a non-flat PKG.

    --https://donmontalvo.com
    M
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    • mschroder
    • Valued Contributor
    • 359 replies
    • December 7, 2016

    A few comments:

    • Good idea to save resources and not do the transfer and install if not needed.

    • Instead of running the script again and again, just to find out the package is already there you could make a smart group that contains the devices that don't have the package installed, and run it only on these.

    • Non-zero exit codes usually indicate that an error occurred. It is useful to stick to that convention and don't use non-zero exit codes to signal something else.

    • A package in /Applications? Sounds weird to me.

    Cheers,

    Matthias

    S
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    • scentsy
    • Author
    • Contributor
    • 49 replies
    • December 7, 2016

    @mschroder thank you for your comments =)

    yes you are right a package in Applications doesn't make sense =) I didn't explain it correctly, so the package gets download it to /tmp/CD/file.pkg than the scripts run the installer and what it actually happens the file.pkg installs the application into /Applications =)

    I will also try your suggestion on using a smart group.

    Thank you very much!

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