Convert a script to one-liner

(sed 's/#.*//g'|sed '/^ *$/d'|tr '\n' ';'|xargs echo) < script.sh
Opposite: Convert an one-liner to script: foo() { <one-liner> ; } ... typeset -f foo ... unset -f foo

5
By: knoppix5
2013-10-26 23:23:51

What Others Think

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: $# (the number of parameters).
flatcap · 311 weeks and 2 days ago
slightly improoved, yet far from perfect: (sed '/if *$\|then *$\|else *$/!s/$/;/g'|sed 's/^#.*;\| #.*;//g'|xargs echo) <script.sh
knoppix5 · 311 weeks and 2 days ago
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
flatcap · 311 weeks and 1 day ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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