Implement the "publish-action" action

src/api-utils.ts

@@ -0,0 +1,103 @@
+import * as core from '@actions/core';
+import { context } from '@actions/github';
+import { GitHub } from '@actions/github/lib/utils';
+
+interface GitRef {
+    ref: string;
+    node_id: string;
+    url: string;
+    object: {
+        type: string;
+        sha: string;
+        url: string;
+    };
+}
+
+async function findTag(
+    tag: string,
+    octokitClient: InstanceType<typeof GitHub>
+): Promise<GitRef | null> {
+    try {
+        const { data: foundTag } = await octokitClient.git.getRef({
+            ...context.repo,
+            ref: `tags/${tag}`
+        });
+        
+        return foundTag;
+    } catch (err) {
+        if (err.status === 404) {
+            return null;
+        } else {
+            throw err;
+        }
+    }
+}
+
+async function getTagSHA(
+    tag: string,
+    octokitClient: InstanceType<typeof GitHub>
+): Promise<string> {
+    const foundTag = await findTag(tag, octokitClient);
+    if (!foundTag) {
+        throw new Error(
+            `The '${tag}' tag does not exist in the remote repository`
+        );
+    }
+
+    return foundTag.object.sha;
+}
+
+export async function validateIfReleaseIsPublished(
+    tag: string,
+    octokitClient: InstanceType<typeof GitHub>
+): Promise<void> {
+    try {
+        const { data: foundRelease } = await octokitClient.repos.getReleaseByTag({
+            ...context.repo,
+            tag,
+        });
+
+        if (foundRelease.prerelease){
+            throw new Error(
+                `The '${foundRelease.name}' release is marked as pre-release. Updating tags for pre-release is not supported`
+            );
+        }
+    } catch (err) {
+        if (err.status === 404) {
+            throw new Error(
+                `No GitHub release found for the ${tag} tag`
+            );
+        } else {
+            throw err;
+        }
+    }
+}
+
+export async function updateTag(
+    sourceTag: string,
+    targetTag: string,
+    octokitClient: InstanceType<typeof GitHub>
+): Promise<void> {
+    const sourceTagSHA = await getTagSHA(sourceTag, octokitClient);
+    const foundTargetTag = await findTag(targetTag, octokitClient);
+    const refName = `tags/${targetTag}`;
+
+    if (foundTargetTag) {
+        core.info(`Updating the '${targetTag}' tag to point to the '${sourceTag}' tag`);
+
+        await octokitClient.git.updateRef({
+            ...context.repo,
+            ref: refName,
+            sha: sourceTagSHA,
+            force: true
+        });
+    } else {
+        core.info(`Creating the '${targetTag}' tag from the '${sourceTag}' tag`);
+
+        await octokitClient.git.createRef({
+            ...context.repo,
+            ref: `refs/${refName}`,
+            sha: sourceTagSHA
+        });
+    }
+}