Export and import GitHub labels between projects by running JavaScript in the browser console to automate clicks.

github-export-labels.js

/**
 * Inspired by @MoOx original script: https://gist.github.com/MoOx/93c2853fee760f42d97f
 * Adds file download per @micalevisk https://gist.github.com/MoOx/93c2853fee760f42d97f#gistcomment-2660220
 * 
 * Changes include:
 *  - Get the description from the `title` attribute instead of `aria-label` (doesn't exist anymore)
 *  - Use style.backgroundColor and parse the rgb(...) to hex (rather than regex parsing of 'style' string)
 *  - Downloads labels to a JSON file named after the webpage to know which GitHub repo they came from.
 * 
 * Last tested 2019-July-27:
 *  - Chrome 75.0.3770.142
 *  - Safari 12.1.2
 *  - macOS 10.14.6
 */
function exportGitHubLabels() {
    let labels = [];
    [].slice.call( document.querySelectorAll( '.label-link' ) )
    .forEach( element => {
        labels.push({
            name: element.textContent.trim(),
            description: element.getAttribute( 'title' ),
            color: (
                // style.backgroundColor returns "rgb(...)"
                // but GitHub expects hex when we import the colors
                element.style.backgroundColor
                // grab between 'rgb(' and ')'
                .substring( 4, element.style.backgroundColor.length - 1 )
                // convert comma-delimited string into array of three numbers
                .split( ',' )
                // reduce array of three numbers into single hex color 
                .reduce( ( hexValue, rgbValue ) => {
                    return (
                        // append next two-digit hex value
                        hexValue +
                        // convert decimal to hex
                        Number( rgbValue ).toString( 16 )
                        // each number in a hex color is two characters
                        .padStart( 2, '0' )
                    );
                }, '' )
            )
        });
    });
    return labels;
}

function saveDataAsJSON( data, filename ) {
    const blob = new Blob( [ JSON.stringify( data, null, 4 ) ], { type: 'text/json' } );
    const a = document.createElement( 'a' );
    a.download = filename;
    a.href = window.URL.createObjectURL( blob );
    a.dataset.downloadurl = [ 'text/json', a.download, a.href ].join( ':' );
    a.click();
}

saveDataAsJSON( exportGitHubLabels(), document.title + '.json' );

github-import-labels.js

/**
 * Inspired by @Isaddo original script: https://gist.github.com/Isaddo/7efebcb673a0957b9c6f07cd14826ea4
 * Adds descriptions per @NillerMedDild https://gist.github.com/Isaddo/7efebcb673a0957b9c6f07cd14826ea4#gistcomment-2715349
 * 
 * Changes include:
 *  - CSS selectors use `js` prefix
 * 
 * Last tested 2019-July-27:
 *  - Chrome 75.0.3770.142
 *  - Safari 12.1.2
 *  - macOS 10.14.6
 */
function createLabel( label ) {
    document.querySelector( '.js-new-label-name-input' ).value = label.name;
    document.querySelector( '.js-new-label-description-input' ).value = label.description;
    document.querySelector( '.js-new-label-color-input' ).value = '#' + label.color;
    document.querySelector( '.js-details-target ~ .btn-primary' ).disabled = false;
    document.querySelector( '.js-details-target ~ .btn-primary' ).click();
}

function updateLabel( label ) {
    let updatedLabel = false;
    [].slice.call( document.querySelectorAll( '.js-labels-list-item' ) ).forEach( element => {
        if ( element.querySelector( '.js-label-link' ).textContent.trim() === label.name ) {
            updatedLabel = true;
            element.querySelector( '.js-edit-label' ).click();
            element.querySelector( '.js-new-label-name-input' ).value = label.name;
            element.querySelector( '.js-new-label-description-input' ).value = label.description;
            element.querySelector( '.js-new-label-color-input' ).value = '#' + label.color;
            element.querySelector( '.js-edit-label-cancel ~ .btn-primary' ).click();
        }
    });
    return updatedLabel;
}

function createOrUpdate( label ) {
    if ( !updateLabel( label ) ) {
        createLabel( label );
    }
}

[
    // YOUR LABELS JSON HERE
].forEach( label => createOrUpdate( label ) );

github-sample-labels.json

[
    {
        "name": "a11y",
        "description": "This needs improved accessibility. https://a11yproject.com/",
        "color": "20e5d8"
    },
    {
        "name": "bug: crash 💥",
        "description": "App crashes and is unusable in a significant way.",
        "color": "fbca04"
    },
    {
        "name": "bug: regression ↩️",
        "description": "A new version of the app broke something.",
        "color": "fbca04"
    },
    {
        "name": "bug 🐞",
        "description": "App is not working correctly.",
        "color": "fbca04"
    },
    {
        "name": "discussion 💬",
        "description": "Discussing usage, best practices, questions, etc.",
        "color": "e99695"
    },
    {
        "name": "documentation 📓",
        "description": "Related to improving documentation and the wiki.",
        "color": "6addf7"
    },
    {
        "name": "enhancement ✨",
        "description": "A new feature suggestion or improvement upon an existing feature.",
        "color": "84b6eb"
    },
    {
        "name": "salesforce known issue ⚠️",
        "description": "A known issue with the Salesforce platform and likely not something the app can address.",
        "color": "fcec85"
    },
    {
        "name": "security 🔒",
        "description": "Questions, concerns, or suggestions for improving the security of the app.",
        "color": "1d76db"
    },
    {
        "name": "status: in progress ❇️",
        "description": "Currently being developed for a future release.",
        "color": "c2e0c6"
    },
    {
        "name": "status: on hold 💤",
        "description": "Work has stopped. There may be one or more blockers or needs more information.",
        "color": "c2e0c6"
    },
    {
        "name": "status: resolved ✅",
        "description": "This has been addressed in a branch and will be scheduled for release in the assigned milestone.",
        "color": "c2e0c6"
    }
]

my-general-github-issues.png

The class name of labels has changed. For the export script to work you have to change .label-link to .js-label-link.

@germanfr is correct 👍

The export script doesn't export the colors correct. They are always 00