[SOLVED] using sed find a word and append a suffix at the end of the matched word

Issue

I have some texts in the file looking like:

'PALAL_3002_NEP_POLICIES':
 Name: SomeRandomName:Here
 Desc: "Random description here"
 Chart Name: palal
 Labels:
 - Label1: '#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY'
 - Label2: '#AL_RAND_DUMMY_SER_PSA_NEP_POLICY-DUMMY_SER_PAL_NEP'
 - Label3: '#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY-DUMMY_SER_NEG_NEP'
 - Label4: '#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY-#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY'

I want to find a word containing a string PAL in capital letters and suffix the matched word with _MATCH. The string PAL can exist in a word without hyphen , or with hyphen separated.

Expected output:

'PALAL_3002_NEP_POLICIES_MATCH': 
 Name: SomeRandomName:Here
 Desc: "Random description here"
 Chart Name: palal
 Labels:
 - Label1: '#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY_MATCH'
 - Label2: '#AL_RAND_DUMMY_SER_PSA_NEP_POLICY-DUMMY_SER_PAL_NEP_MATCH'
 - Label3: '#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY_MATCH-DUMMY_SER_NEG_NEP'
 - Label4: '#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY_MATCH-#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY_MATCH'

This is what I did but it suffixed every words with _MATCH:

sed '/PAL/s/\>/_MATCH/g' practice.txt

Any help would be appreciated.

Solution

If the text you want to append to only contains uppercase characters, digits and underscores, you can use the following:

sed 's/\(PAL[A-Z_0-9]*\)/\1_MATCH/g' foo
       \(             \)                    #capturing group
         PAL                                #literal text
            [A-Z_0-9]                       #character class, any of the contained characters
                     *                      #quantifier, match previous expression between 1 to infinity times
                         \1                 #backreference to the first capturing group
                           _MATCH           #literal text, suffix

Example:

╰─$ sed 's/\(PAL[A-Z_0-9]*\)/\1_MATCH/g' foo

'PALAL_3002_NEP_POLICIES_MATCH':
 Name: SomeRandomName:Here
 Desc: "Random description here"
 Chart Name: palal
 Labels:
 - Label: '#AL_RAND_DUMMY_PAL_PSA_NEP_POLICY_MATCH'

Answered By - mashuptwice

Answer Checked By - David Goodson (WPSolving Volunteer)