Export, Import, Update, Delete GitHub labels via browser console command

export-import-update-delete-github-labels.md

Usage

• This script allows export, import, update and delete of GitHub Labels
• Adopted from Isaddo's gist with some tweaks for 2020
• Included a delete script too

Export Labels

1. Go to the source repository's labels page
2. Open up the browser console
3. Copy and paste the following script & copy its output

   var labels = [];
   []
   .slice
   .call(document.querySelectorAll(".js-label-link"))
   .forEach(function(element) {
     labels.push({
       name: element.textContent.trim(),
       description: element.getAttribute("title"),
       // using style.backgroundColor might returns "rgb(...)"
       color: element.getAttribute("style")
         .replace("background-color:", "")
         .replace(/color:.*/,"")
         .trim()
         // github wants hex code only without # or ;
         .replace(/^#/, "")
         .replace(/;$/, "")
         .trim(),
     })
   })
   
   console.log(JSON.stringify(labels, null, 2))

Delete Labels

1. Go to destination repository's labels page
2. Open browser console
3. Copy and paste the following script
   (Note: This script will delete all labels)

   []
   .slice
   .call(document.querySelectorAll(".js-labels-list-item"))
   .forEach(function(element) {
     var button = element.querySelector('.js-delete-label').querySelector('button')
     button.removeAttribute('data-confirm')
     button.click()
   })

Import or Update Labels

1. Go the destination repository's labels page
2. Open up the browser console
3. Paste the output from the previous section
4. Copy and paste the following script to the same last line of the previus step
   (The script below will import new labels or automatically update pre-existing labels)

   .forEach(function(label) {
     addLabel(label)
   })
   
   function updateLabel (label) {
     var flag = false;
     []
     .slice
     .call(document.querySelectorAll(".js-labels-list-item"))
     .forEach(function(element) {
       if (element.querySelector('.js-label-link').textContent.trim() === label.name) {
         flag = 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 flag
   }
   
   function addNewLabel (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 addLabel (label) {
     if (!updateLabel(label)) addNewLabel(label)
   }