[SOLVED] Find a string which has leading space and add line exactly below to add line

Issue

I have a file like below.

    # Start OF Java_Out_Of_Memory
    - displayName: "Java_Out_Of_Memory"
      logDirectory: "/opt/xyz"
      logName: "TextLog_*"
      searchStrings:
         - displayName: "Out_Of_Memory"
           pattern: "java.lang.OutOfMemoryError"
           matchExactString: false
           caseSensitive: false 
    # End OF Java_Out_Of_Memory

I wanted to add line exactly below of caseSensitive: false with printMatchesString: false...

# Start OF Java_Out_Of_Memory
    - displayName: "Java_Out_Of_Memory"
      logDirectory: "/opt/xyz"
      logName: "TextLog_*"
      searchStrings:
          #displayName Should be unique across the patterns including the case.
         - displayName: "Out_Of_Memory"
           pattern: "java.lang.OutOfMemoryError"
           matchExactString: false
           caseSensitive: false  
           printMatchedString: false
# End OF Java_Out_Of_Memory

I don't know how many lead space of matched string... Leading space may vary depends on file to file.

I tried this

sed -i '/^[^#]*caseSensitive:*/a \\         printMatchedString: false'

So my requirement is to add a line exactly below and even consider lead space

NOTE:- I have multi configuration like above and I need add PrinitMatched string on every configuration

Solution

Try this:

sed -E '/^[^#]*caseSensitive:/ {p; s/^([[:blank:]]*)[^[:blank:]].*$/\1printMatchesString: false/;}' myfile.txt

Explanation:

• /^[^#]*caseSensitive:/ - on lines matching "caseSensitive:" (not preceded by "#"
• { - do the following block of commands
• p - print the current line (in its original form)
• s/^([[:blank:]]*)[^[:blank:]].*$/\1printMatchesString: false/ - parse the line as a bunch of blanks (in parens, so it's a capture group) and then whatever's left, and replace it with the blanks (\1 recalls the capture group) and "printMatchesString: false". Note that the result will be printed automatically.
• } - marks the end of the group of commands

Answered By - Gordon Davisson

Answer Checked By - Robin (WPSolving Admin)