How to select a string from a variable using grep or awk-CodePudding

I have a variable which has content like

----- File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s ----------------------------------|---------|----------|---------|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- All files | 36.95 | 20.87 | 24.

I am trying to extract the value associated with All files i.e 36.95. I am able to use cut to get the substring like this

TOTAL="$(cut -c 60-990 <<< $RES)"

But I am looking for better approach for example using a regex pattern, I saw patterns like grep and awk but I am not able to formulate it.

CodePudding user response：

cut can define fields based on a delimter so this should work (assuming the number you're looking for will always be in the 12th |-delimited field):

$ TOTAL=$(cut -d'|' -f12 <<< "${RES}")
$ typeset -p TOTAL
declare -- TOTAL=" 36.95 "

$ TOTAL="${TOTAL// /}"                     # to remove spaces
$ typeset -p TOTAL
declare -- TOTAL="36.95"

CodePudding user response：

If you're not limiting yourself to cut, this is a possible answer using sed that looks for the All files | ... | pattern and grabs the text from there.

TOTAL="$(sed -E 's/^.* All files \| ([^ ] ) \| .*$/\1/' <<< $RES)"

CodePudding user response：

And since you mentioned it - here an awk alternative:

total=$(awk -F'|' '{print $12}'<<<"${res}")

Note: all uppercase variable names are (more by convention than anything) reserved for the system.