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Show a script or config file without comments

Terminal - Show a script or config file without comments
egrep -v "^[[:blank:]]*($|#|//|/\*| \*|\*/)" somefile
2009-11-10 18:49:19
User: sdadh01
Functions: egrep
0
Show a script or config file without comments

Alternatives

There are 6 alternatives - vote for the best!

Terminal - Alternatives
egrep -v "^$|^[[:space:]]*#" /etc/some/file
2009-05-12 07:14:48
User: michauko
Functions: egrep
Tags: egrep
15

Shows a file without comments (at least those starting by #)

- removes empty lines

- removes lines starting by # or "some spaces/tabs then #'"

Useful when you want to quickly see what you have to customize on a freshly installed application without reading the comments that sometimes are a full 1000 lines documentation :)

While posting, I saw this http://www.commandlinefu.com/commands/view/1041/display-contents-of-a-file-wo-any-comments-or-blank-lines

But it's dirty and incomplete, to my mind

My original goal was to remove lines like "\t*#" but I can't figure out how to do a egrep '\t' on a command-line. Two workarounds if needed:

egrep -v 'press control + V then TAB then #' /your/file

or

egrep -v -f some_file /your/file #where some_file contains what you want to exclude, example a really inserted TAB
egrep -v "^$|^#" file
sed -e 's/#.*//;/^\s*$/d'
grep -v ^# /etc/somefile.conf | grep .
2011-05-17 01:24:08
User: kad
Functions: grep
Tags: grep
0

easier to remember

sed -e '/^[[:blank:]]*#/d; s/[[:blank:]][[:blank:]]*#.*//' -e '/^$/d' -e '/^\/\/.*/d' -e '/^\/\*/d;/^ \* /d;/^ \*\//d' /a/file/with/comments
2009-11-10 17:47:22
Functions: sed
Tags: sed PHP
-3

Strips comments from at least bash and php scripts. Normal # and // as well as php block comments

removes all of the:

empty/blank lines

lines beginning with #

lines beginning with //

lines beginning with /*

lines beginning with a space and then *

lines beginning with */

It also deletes the lines if there's whitespace before any of the above.

Add an alias to use in .bashrc like this:

alias stripcomments="sed -e '/^[[:blank:]]*#/d; s/[[:blank:]][[:blank:]]*#.*//' -e '/^$/d' -e '/^\/\/.*/d' -e '/^\/\*/d;/^ \* /d;/^ \*\//d'"

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