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Re: Can't convert image file using a bash script
Posted: 2018-11-12T19:18:37-07:00
by Boogal
snibgo wrote: ↑2018-11-12T18:32:56-07:00
How did you create the shell script file? If you used Windows tools, line-ends are probably marked with carriage-return and line-feed, but bash normally expects just line-feed, and you need to tell it to ignore carriage-return. See
IM with Cygwin: Line ends for workarounds.
This solved it, thanks so much.
edit: a friend told me I should add to this in case any future folks find this googling:
I ended up just adding the following to lines to my bash_profile for cygwin:
to universally ignore carriage returns.
Re: Can't convert image file using a bash script
Posted: 2018-11-12T19:26:06-07:00
by snibgo
Good stuff. I suggest you review all my comments in
IM with Cygwin. I documented the problems I found, with solutions, to save other people hitting them.
Re: Can't convert image file using a bash script
Posted: 2018-11-13T10:09:35-07:00
by bratpit
Read what bash telling you.
est.sh: line 3: -4: substring expression < 0
this means bash not allow negative values in substring expansion.
This works in bash > 4.2.
Probably your bash in Cygwin is < 4.2.
Check this parametr expansion:
${1%.*}palette.png
if not this old-school
works in bash, sh, ash, dash, busybox/ash, zsh, ksh, etc.
${1%?}palette.png
Re: Can't convert image file using a bash script
Posted: 2018-11-13T10:30:38-07:00
by bratpit
duplicate prev. post
Re: Can't convert image file using a bash script
Posted: 2018-11-13T10:31:21-07:00
by fmw42
This works on my Mac: ${1%.*}
This does not work on my Mac: ${1::-4}
Unfortunately, Apple provides only older versions of bash on my 2014 Mac Mini. My bash is 3.2.57
Re: Can't convert image file using a bash script
Posted: 2018-11-13T10:40:09-07:00
by bratpit
Fortunatelly there is several ways to do the same in bash
