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Opposite:
Convert an one-liner to script:
foo() { <one-liner> ; }
...
typeset -f foo
...
unset -f foo
There are 3 alternatives - vote for the best!
If you can do better, submit your command here.
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What a fascinating idea :-)
Unfortunately, it's easily confused.
Many compound statements get unnecessary semi-colons:
if [ "$x" = 1 ]; then; echo one; fi
Also, one of my favourite shell variables gets chewed up: $# (the number of parameters).
slightly improoved, yet far from perfect:
(sed '/if *$\|then *$\|else *$/!s/$/;/g'|sed 's/^#.*;\| #.*;//g'|xargs echo) <script.sh
I ended up with:
(sed -e 's/^\s*\(.*\)\s*/\1/' -e 's/\([^$]\|^\)#.*//' -e '/^$/d' | paste -s -d\; | sed -e 's/\<\(then\|do\)\>;/\1 /g') < script.sh
sed part 1: trim leading/trailing whitespace
sed part 2: # at the beginning of a line, or # (but not preceded by $)
sed part 3: delete empty lines
paste: join lines with a ;
sed part 4: replace 'then;' or 'do;' with 'then' or 'do'
However, your 'xargs echo' is much nicer.
(sed -e 's/\([^$]\|^\)#.*//' -e '/^$/d' | tr '\n' ';' | xargs echo | sed -e 's/\<\(then\|do\)\>;/\1/g') < script.sh