1import * as core from '@actions/core';
 2import * as github from '@actions/github';
 3
 4async function run() {
 5    try {
 6        const labels_to_add = core.getMultilineInput('add');
 7        const labels_to_remove = core.getMultilineInput('remove');
 8
 9        const token = process.env.GITHUB_TOKEN;
10        if (!token) {
11            throw new Error('missing required environment variable: GITHUB_TOKEN');
12        }
13
14        const issue_number = github.context.issue.number;
15        if (!issue_number) {
16            throw new Error('no issue or pull request context found');
17        }
18
19        const event_name = github.context.eventName;
20        const event_action = github.context.payload.action;
21        console.log(`triggered by: ${event_name}.${event_action} for #${issue_number}`);
22
23        const { owner, repo } = github.context.repo;
24
25        const overlap = labels_to_add.filter(label => labels_to_remove.includes(label));
26        if (overlap.length > 0) {
27            const formatted = overlap.map(label => `- ${label}`).join('\n');
28            throw new Error(`detected conflicting labels:\n\n${formatted}`);
29        }
30
31        const octokit = github.getOctokit(token);
32
33        const { data: issue } = await octokit.rest.issues.get({
34            owner,
35            repo,
36            issue_number
37        });
38
39        const current_labels = issue.labels.map(label => label.name);
40
41        if (labels_to_add.length > 0) {
42            const labels = []
43
44            for (const label of labels_to_add) {
45                if (!current_labels.includes(label)) {
46                    labels.push(label);
47                }
48            }
49
50            if (labels.length > 0) {
51                await octokit.rest.issues.addLabels({
52                    owner,
53                    repo,
54                    issue_number,
55                    labels
56                });
57            } else {
58                console.log(`no new labels to add`)
59            }
60        }
61
62        if (labels_to_remove.length > 0) {
63            for (const label of labels_to_remove) {
64                if (current_labels.includes(label)) {
65                    console.log(`removing label: ${label}`);
66                    await octokit.rest.issues.removeLabel({
67                        owner,
68                        repo,
69                        issue_number,
70                        name: label
71                    });
72                }
73            }
74        }
75    } catch (error) {
76        core.setFailed(error.message);
77    }
78}
79
80run();