How to edit a JS file with a shell script

Question

I have a configuration file in JS that exports an array of of objects:

const configuration: ConfigData[] = [
    {
        pathToPage: 'some/path',
        pathToComponent: 'components/some-component',
        roles: [Roles.Admin],
    },
    {
        pathToPage: 'some/path/2',
        pathToComponent: iframeLoader,
        roles: [Roles.User],
    },
];

export default configuration;

I'd like to add a new object at the end of the array using a shell script, so that my file looks likes this:

const configuration: ConfigData[] = [
    {
        pathToPage: 'some/path',
        pathToComponent: 'components/some-component',
        roles: [Roles.Admin],
    },
    {
        pathToPage: 'some/path/2',
        pathToComponent: iframeLoader,
        roles: [Roles.User],
    },
    {
        pathToPage: 'some/path/3',
        pathToComponent: iframeLoader,
        roles: [Roles.User, Roles.Admin],
    },
];

export default configuration;

Is that possible? If so, how do I do it?

urznow · Accepted Answer · 2020-11-05 11:27:48Z

1

awk -v addfile='cfg.add' '/^];$/{ system("cat " addfile) }1' cfg.js inserts the contents of file cfg.add just before the line in cfg.js consisting of ]; and prints the combined output to stdout.

edited Nov 5, 2020 at 11:27

answered Nov 5, 2020 at 11:09

urznow

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