I don't use it that often, but only recently discovered
that linux compat terminals can set their tabstops.
So one can set tabstops to match their code-indentation --
this allows the benefit of letting others be able
to change tab stops if they want more or less indenting
(vs. using space+tabs, -- if they want to look at code
in their preferred indent level, they would need to reformat
the source code -- a minor bit, but it's a place where
I noted BASH doesn't seem compliant.
If I 'reedit my last "statement", it indents 8 spaces/tab.
However, if I take the same source and "cat it to the terminal",
I get the actual tab stops used on the terminal.
Bash shouldn't force it's idea of tab expansion by ignoring
the terminal's tabstops (and if it can't read the tabstops-
just using the actual tab character is sufficient).
Example -- here's my code as expanded by echo:
while read fn;do
d=${fn%.zip}
(
cd "$d" && {
base=${d%-*}
if [[ -e $base.exe ]] ;then
mv "$base.exe" "$d.exe" && ln -s "$d.exe" "$base.exe"
fi
cp * ../bin
}
)
done
However, this is what one sees if the re-edit the line:
Ishtar:/> echo 'while read fn;do
d=${fn%.zip}
(
cd "$d" && {
base=${d%-*}
if [[ -e $base.exe ]] ;then
mv "$base.exe" "$d.exe" && ln -s "$d.exe"
"$base.exe"
fi
cp * ../bin
}
)
done'
---
The above echo line produced the 1st shown output -- because bash isn't
using real tabstops -- but is expanding them into spaces for display, though
the re-edited, upon execution display as in the 1st example.
Note, if you have a linux-compat terminal (or try this on you linux
console: You can use this little script to set your tabs:
> more tty_tab
#!/bin/bash
#console_codes(4) man page...
printf -v sts "\033H"
if (($#==0)) ; then
echo "$0: <n>" - set tab stop to N
exit 1
fi
declare -i tab=$1;
str=""
declare -i pos=1
while ((++pos<80)) ;do
if ((pos%tab)); then str+=" "
else str+="$sts"
fi
done
echo -e "\033c"
echo "$str"
Could bash use 'real tabs' instead of substituting spaces?
(Either that or have a way to set tab expansion. Note that the
linux console can set tabstops to arbitrary columns (they don't
have to be regularly spaced)
Thanks...
-l
