With the Rise of DevOps, Perl Shows Its Muscle

Re:With the Rise of DevOps, Perl Shows Its Muscle by DCoder on Sunday January 08, 2017 @03:29AM (#13348898)

I use the verbose version for readability:

    set -o errexit
    set -o nounset
    set -o pipefail

Some commands need custom error handling, which means turning off -e:

    set +o errexit

    ansible-playbook ...

    if [[ "$?" != "0" ]]; then
        echo -e "\e[1;31m""Error when executing ansible!""\e[0m"
        exit 1
    fi

    set -o errexit

And if you use -e , you will probably need the default value helper to validate input arguments:

    # the :- operator means "use the right side value if the left side ($1) is not set"
    env=${1:-}
    
    inventoryFile="${baseDir}/env/${env}/inventory"

    if [[ -f "${inventoryFile}" ]]; then
        echo -e "\e[1;31m""Invalid environment specified!""\e[0m"
        exit 1
    fi

[ Parent | on HN ]

Re:With the Rise of DevOps, Perl Shows Its Muscle by Ded7xSEoPKYNsDd on Sunday January 08, 2017 @07:20AM (#13349411)

I feel your first example is better written like this:

    if ! ansible-playbook ... ; then 
        echo -e "\e[1;31m""Error when executing ansible!""\e[0m"
        exit 1
    fi

But generally when I need to work around errexit, I tend to add something like " || true" or " || xyz_failed=true" to the end of the command line instead of turning it off and on again.

[ Parent | on HN ]