Attempts to remove the tag from cards.

action.yml

@@ -0,0 +1,18 @@
+name: 'Remove Label from Cards'
+description: 'Removes the given label from all cards in the given column.'
+inputs:
+  token:
+    description: 'github token'
+    required: true
+    default: ''
+  label_to_remove:
+    description: 'Label to remove'
+    required: true
+    default: ''
+  column_id:
+    description: 'Column id'
+    required: true
+    default: ''
+runs:
+  using: 'node12'
+  main: 'index.js'

bin/deploy.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+if [ "$#" != "1" ]
+then
+	echo "USAGE: $0 <commit-message>"
+	exit
+fi
+
+git add -A
+git commit -m "$@"
+git push origin main
+git tag -d v1
+git tag -a -m "Release version" v1
+git push --delete origin v1
+git push origin v1
+

index.js

@@ -0,0 +1,52 @@
+const core = require('@actions/core');
+const github = require('@actions/github');
+const token = core.getInput('token');
+const labelToRemove = core.getInput('label_to_remove');
+const columnId = core.getInput('column_id');
+const repoOwner = github.context.repo.owner;
+const repo = github.context.repo.repo;
+const octokit = github.getOctokit(token);
+
+async function main() {
+  // Get the cards from the given column
+  var cards = null;
+  try {
+    cards = await octokit.projects.listCards({
+      column_id: columnId,
+      archived_state: 'not_archived'
+    });
+  }
+  catch (e) {
+    console.log(e.message);
+    return;
+  }
+
+  // Remove the label from the cards
+  cards.data.forEach(async card => {
+    if (!card.content_url) {
+      // This occurs for notes, where the card is not an issue
+      return true;
+    }
+    const matches = card.content_url.match(/\/issues\/(\d+)/);
+    if (!matches) {
+      console.log(`Couldn't match the regexp against '${card.content_url}'.`);
+      return true;
+    }
+
+    const issueNumber = matches[1];
+    try {
+      await octokit.issues.removeLabel({
+        owner: repoOwner,
+        repo: repo,
+        issue_number: issueNumber,
+        name: labelToRemove
+      });
+    }
+    catch (e) {
+      console.log(e.message);
+      return true;
+    }
+  });
+}
+
+main();