Bash - substituting parameter in parent match (SED/AWK)

Question

I'm working on a small script to take some variables, packageName, newVersion. I've googled and tried an awful lot and it brings me to asking.

The script executes as: updatePackage.sh -p weblogic-pkg-1 -v 2.0.1-B3

This reads yaml:

## Weblogic Deployment
   'weblogic-pkg-1':
     ensure:            'present'
     deploymenttype:    'AppDeployment'
     versionidentifier: '2.0.0-B2'
     timeout:           60
     stagingmode:       "nostage"
     remote:            "1"
     upload:            "1"
     target:
       - "%{hiera('package_clustername')}"
     targettype:
       - 'Cluster'
     localpath:         '/opt/releases/staging/applications/weblogic-pkg-1/weblogic-pkg-1-2.0.0-B2.war'

I am trying to get the script to change the version number once it has matched the package, so the desired output is:

## Weblogic Deployment
   'weblogic-pkg-1':
     ensure:            'present'
     deploymenttype:    'AppDeployment'
     versionidentifier: '2.0.1-B3'
     timeout:           60
     stagingmode:       "nostage"
     remote:            "1"
     upload:            "1"
     target:
       - "%{hiera('package_clustername')}"
     targettype:
       - 'Cluster'
     localpath:         '/opt/releases/staging/applications/weblogic-pkg-1/weblogic-pkg-1-2.0.1-B3.war'

The YAML file has about 50 packages so I cannot just sed /version/newVersion sadly. The system is also pretty locked down so adding a yaml parser to the OS might be tricky.

Any tips?

Thanks

Dave

Maybe the question is obvious for you, but you should add more details. What exactly are you trying to accomplish? I take what you posted to be the original file, if so then please post the file as you would like it to be modified by `sed` or `awk`. Also post the commands you've been using so others may suggest how to fix them. — simlev, Jun 12 '17 at 13:51
Thanks for the reply. I've updated the original question so that it is hopefully a little more understandable :) — ds2000, Jun 13 '17 at 06:14

score 0 · Answer 1 · answered Jun 14 '17 at 13:07

Finally, I managed it with perl. I hope this helps someone else:

#perl -000 -n -i -e "s/versionidentifier: '2.0.0-B1'/versionidentifier: '2.0.0-B3'/m if /\'weblogic-pkg-1\':/; print;" /opt/releases/staging/hiera/dev/deployments/node.corp.yaml

For the directory update, change the delimiter to an @:

perl -000 -n -i -e "s@localpath:         '/opt/releases/staging/applications/weblogic-pkg-1/weblogic-pkg-1-2.0.0-B1.war''@localpath:         '/opt/releases/staging/applications/weblogic-pkg-1/weblogic-pkg-1-2.0.1-B2.war'@m if /\'vet-common-status-service\':/; print;" /opt/releases/staging/hiera/dev/deployments/node.corp.yaml

simlev · Answer 2 · 2017-06-14T13:32:42.303

I see you got the hang of it with perl. That's what I would have suggested:

perl -lape "if (/'weblogic-pkg-1':/../localpath:/ and /versionidentifier|localpath:/) {\$a = \$1 if /\s+versionidentifier: '(.+)'/;s/\$a/2.0.1-B3/}" input.txt

If you want to wrap it in a Bash script:

#!/usr/bin/env bash

while getopts ":p:v:" opt; do
  case $opt in
    p) p="$OPTARG"
    ;;
    v) v="$OPTARG"
    ;;
    \?) echo "Invalid option -$OPTARG" >&2
    ;;
  esac
done

perl -lape "if (/'$p':/../localpath:/ and /versionidentifier|localpath:/) {\$a = \$1 if /\s+versionidentifier: '(.+)'/;s/\$a/$v/}" input.txt

Note: I did not include the -i switch because it is dangerous: you should first experiment and tweak the script to your needs, and only then substitute perl -i -lane instead of perl -lane.

Bash - substituting parameter in parent match (SED/AWK)

2 Answers2