搜索文本并将其追加到文本文件的每一行末尾-OSX

Question

I'm new to OSX command line tools.

I am trying to find a block of text in a file and append this text at the end of all lines in another text file. At run time I don't know what this text will be, I just know it will be located within "BEGINHMM" and "ENDHMM". Also, I don't know the makeup of the destination file, except for that it will not be an empty text file.

The command which finds the block of text of interest is:

sed -n '/<BEGINHMM>/,/<ENDHMM>/p' proto

where "proto" is a text file containing the text of interest.

I've been trying to pipe the output of the above command to another 'sed' command, in the following manner:

xargs -I '{}' sed -i .bak 's/$/{}/' monophones0.txt 

but I am getting some bizarre results, I see the "{}" inserted in the text for example.

I've also tried piping to:

xargs -0 sed -i .bak 's/$/&/' monophones0.txt

but I just get the printout (similar to terminal echo) of the text I am trying to grab.

Ultimately I want to loop over several 'proto' files in multiple directories and copy the text between the "BEGINHMM", "ENDHMM" block in each directory, and append the selected text to that directory's monophones.txt lines.

I am running the commands in the terminal, bash, OSX 10.12.2

Any help would be appreciated.

Answer 1

(1) Your sed command is of the form sed -n '/A/,/B/p' ; this will include the lines on which A and B occur, even if these strings do not appear at the beginning of the line. This form may have other surprises in store for you as well (what do expect will happen if B is missing or repeated?), but the remainder of this post assumes that's what you want.

(2) It's not clear how you intend to specify the "proto" files, but you do indicate they might be in several directories, so for the remainder of this post, I'll assume they are listed, one per line, in a file named proto.txt in each directory. This will ensure that you don't run into any limitations on command-line length, but the following can easily be modified if you don't want to create such a file.

(3) Here is a script which will use the sed command you've mentioned to copy segments from each of the "proto" files specified in a directory to monophones0.txt in the directory in which the script is executed.

#!/bin/bash

OUT=monophones0.txt

cat proto.txt | while read file
do
  if [ -r "$file" ] ; then
    sed -n '/<BEGINHMM>/,/<ENDHMM>/p' "$file" >> $OUT
  elif [ -n "$file" ] ; then
    echo "NOT FOUND: $file" >&2
  fi
done    

Answer 2

Just like what you did before. tmpfile=$(mktemp); sed -n '/<BEGINHMM>/,/<ENDHMM>/p' proto >$tmpfile; sed -i .bak "r $tmpfile" monophones0.txt; rm $tmpfile tmpfile=$(mktemp); sed -n '/<BEGINHMM>/,/<ENDHMM>/p' proto >$tmpfile; sed -i .bak "r $tmpfile" monophones0.txt; rm $tmpfile . This is the basic idea; there are other checks you need to perform to make this a robust script. – 4ae1e1