search through regex pattern in a file-CodePudding

I have a file with data in below format

abc {u_bit_top/connect_down/u_FDIO[6]/u_latch}
ghi {u_bit_top/seq_connect/p_REDEIO[9]/ff_latch
def {u_bit_top/connect_up/shift_reg[7]

I want to search for pattern *bit_top*FDIO* and *bit_top*REDEIO*in the file in each line and delete the complete line if pattern is found. I want output as

def {u_bit_top/connect_up/shift_reg[7]

I did using sed like sed "/bit_top/d;/FDIO/d;/REDEIO/d;" but this deletes the line having bit_top and FDIO and REDEIO separately. How I can search for above pattern and delete the line containing it. Shell or TCL anything will be useful.

CodePudding user response：

Since you tagged tcl

set fh [open "filename"]
set contents [split [read -nonewline $fh] \n]
close $fh
set filtered [lsearch -inline -not -regexp $contents {bit_top.*(FDIO|REDEIO)}]

results in

def {u_bit_top/connect_up/shift_reg[7]

lsearch documentation.

But really all you need for this is grep

grep -Ev 'bit_top.*(FDIO|REDEIO)' filename

CodePudding user response：

You've been close! ;)

sed '/bit_top.*FDIO/d' input

Just input a regex to sed that matches what you want...

CodePudding user response：

Using sed

$ sed -E '/bit_top.*(REDE|FD)IO/d' input_file
def {u_bit_top/connect_up/shift_reg[7]

CodePudding user response：

You might use GNU AWK for this task following way, let file.txt content be

abc {u_bit_top/connect_down/u_FDIO[6]/u_latch}
ghi {u_bit_top/seq_connect/p_REDEIO[9]/ff_latch
def {u_bit_top/connect_up/shift_reg[7]

then

awk '/bit_top/&&(/FDIO/||/REDEIO/){next}{print}' file.txt

gives output

def {u_bit_top/connect_up/shift_reg[7]

Explanation: if lines contain bit_top AND (FDIO OR REDEIO) then go to next line i.e. skip it. If that did not happen line is just printed.

(tested in GNU Awk 5.0.1)

CodePudding user response：

With a small change you can implement the compound pattern (eg, *bit_top*FDIO*) in sed.

A couple variations on OP's current sed:

# daisy-chain the 2 requirements:

$ sed "/bit_top.*FDIO/d;/bit_top.*REDEIO/d" file
def {u_bit_top/connect_up/shift_reg[7]

# enable "-E"xtended regex support:

$ sed -E "/bit_top.*(FDIO|REDEIO)/d" file
def {u_bit_top/connect_up/shift_reg[7]