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Why doesn't the alias work, but the function does works inside my .bash_profile?

Code inside .bash_profile (below)

alias pxsz='sips -g pixelWidth $1 && sips -g pixelHeight $1'

pxlsz () {
    sips -g pixelWidth $1 && sips -g pixelHeight $1
}

When I tested the alias with

alias pxsz="echo '$1 1' && echo '$1 2' "

gives 

 $pxsz tag_struct.jpg
1
2 tag_struct.jpg
J. Chomel
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Scott Hom
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1 Answers1

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You can't use a variable inside an alias like this. Here you just call to the $1 that must be defined beforehand in your shell, and it is the previous first argument of previous command:

$ set TEST
$ echo $1
TEST
$ alias pxsz="echo '$1 1' && echo '$1 2' "
$  pxsz
TEST 1
TEST 2

The function, like you did, is the way to go.

J. Chomel
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