How can I get all the ENV keys from .rb and .yml files in a directory tree?

Question

I would like to find a way to get the unique keys that are used inside .rb and .yml files. These keys are used inside the hash ENV. So, there are files that contain things like:

ENV['key']

in multiple lines and at various positions within their lines. Also, those might appear multiple times within those lines.

So, If I have the file:

blah blah blah ENV['key1'] blah blah blah ENV['key2']
blah blah blah ENV['key2']
blah blah
ENV['key3'] blah blah ENV['key2']

then I would like to get the list:

key1
key2
key3

I have managed to do this:

find . -iname "*.rb" -o -iname "*.yml" | xargs egrep 'ENV\[.(.*).\]'

but I do not know how to actually get the keys.

Any help would be much appreciated.

score 0 · Answer 1 · edited Apr 13 '17 at 12:36

0

Try using the -o flag to grep to get only the matching parts of the line:

find . '(' -iname "*.rb" -o -iname "*.yml" ')' -exec grep -o -E 'ENV\[.(.*).\]' {} + | sort -u | cut -d'[' -f 2 | tr -d "']"

Also, I highly recommend using the -exec flag to find instead of piping to xargs:

edited Apr 13 '17 at 12:36

Community

1

answered Nov 27 '16 at 17:29

jayhendren

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@jayhandren are you sure this one processes all files? I have tried that and works only with the ".yml" files. Does not process the ".rb" files. – p.matsinopoulos Nov 27 '16 at 17:41
1

The logic on find is incorrect, and needs to instead be find . \( -iname "*.rb" -o -iname "*.yml" \) -exec ... – thrig Nov 27 '16 at 17:46
thanks to both of you, corrected. @p.matsinopoulos it should work correctly now. – jayhendren Nov 27 '16 at 18:02
I think it does not work if there are 2 or more occurrences of ENV inside the same line. – p.matsinopoulos Nov 27 '16 at 20:11
@p.matsinopoulos it does work. if there are multiple matches on the same line, grep -o will print each match separately. – jayhendren Nov 28 '16 at 14:33

How can I get all the ENV keys from .rb and .yml files in a directory tree?

1 Answers1