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the following syntax print the output1 down 

echo "$status"

output1:

 component_name : TEZ_CLIENT recovery_enabled : true component_name : WEBHCAT_SERVER recovery_enabled : true component_name : YARN_CLIENT recovery_enabled : true component_name : ZKFC recovery_enabled : true component_name : ZOOKEEPER_CLIENT recovery_enabled : true component_name : ZOOKEEPER_SERVER recovery_enabled : true

how to add the printf syntax in order to get the following lines:

expected output

 component_name : TEZ_CLIENT recovery_enabled : true component_name : WEBHCAT_SERVER recovery_enabled : true component_name : YARN_CLIENT recovery_enabled : true component_name : ZKFC recovery_enabled : true component_name : ZOOKEEPER_CLIENT recovery_enabled : true component_name : ZOOKEEPER_SERVER recovery_enabled : true
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  • 1
    can you post your initial $status content? (what gives echo "$status") Commented Sep 10, 2017 at 16:11
  • I prefer not because it will print json file , and I just manipulate this file , in any case I want to add the printf to fix the four field Commented Sep 10, 2017 at 16:15
  • 3
    json - it's even better, cause I could suggest jq solution in that case Commented Sep 10, 2017 at 16:17
  • 1
    Yes, don't try parsing a JSON file with anything other than a JSON parser. It may work for one file and one situation, but as a general solution it will fail (since line breaks can happen between keys and values arbitrarily). Commented Sep 10, 2017 at 16:19
  • ok but in any case can you suggest how to enlightenment the four field Commented Sep 10, 2017 at 16:20

2 Answers 2

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echo "$status" | awk '{printf("%s %s %-20s %20s %s %s\n", $1, $2, $3, $4, $5, $6)}'

Will produce

component_name : TEZ_CLIENT recovery_enabled : true component_name : WEBHCAT_SERVER recovery_enabled : true component_name : YARN_CLIENT recovery_enabled : true component_name : ZKFC recovery_enabled : true component_name : ZOOKEEPER_CLIENT recovery_enabled : true component_name : ZOOKEEPER_SERVER recovery_enabled : true

The %-20s format will reserve 20 characters for a left-aligned string, while %20s reserves 20 characters for a right-aligned string. Adjust the 20s to fit your desired format.

In a previous incarnation of this question, you had various transformations using sed and filtering with grep. It is likely these could also be done within the same awk script, directly from a source file. Or, if the file is a JSON file (as you say in comments), directly by jq from that same file.

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Kusalananda's answer is much better than what I was thinking. One thing I had in my construct though was a condition to truncate a column if it was too long. I was able to implement this with his solution:

INPUT

component_name : TEZ_CLIENT recovery_enabled : true component_name : WEBHCAT_SERVER recovery_enabled : true component_name : YARN_CLIENT recovery_enabled : true component_name : ZKFC recovery_enabled : true component_name : ZOOKEEPER_CLIENT recovery_enabled : true component_name : ZOOKEEPER_SERVER recovery_enabled : true component_name : ZOOKEEPER_SERVER_1234567890 recovery_enabled : true

SCRIPT

# /bin/bash - # INPUT_FILE=$HOME/Documents/scripts/shell/testing/input IFS= mapfile -t STATUS_ARRAY < <(cat "$INPUT_FILE" | tr -s " ") for line in "${STATUS_ARRAY[@]}"; do COMPONENT_NAME=$(echo "$line" | awk '{print $3}') if [[ "${#COMPONENT_NAME}" -gt "16" ]]; then echo "$line" | sed "s/${COMPONENT_NAME}/${COMPONENT_NAME:0:16}../" | awk '{printf("%s %s %-20s %20s %s %s\n", $1, $2, $3, $4, $5, $6)}' else echo "$line" | awk '{printf("%s %s %-20s %20s %s %s\n", $1, $2, $3, $4, $5, $6)}' fi done

My script pulls the input from a file but you could likely also set your mapfile by echo $status | grep.. or echo $status | jq..

OUTPUT

component_name : TEZ_CLIENT recovery_enabled : true component_name : WEBHCAT_SERVER recovery_enabled : true component_name : YARN_CLIENT recovery_enabled : true component_name : ZKFC recovery_enabled : true component_name : ZOOKEEPER_CLIENT recovery_enabled : true component_name : ZOOKEEPER_SERVER recovery_enabled : true component_name : ZOOKEEPER_SERVER.. recovery_enabled : true
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