Update locally saved file SHA after it's uploaded

src/events/consumer.ts

@@ -13,7 +13,7 @@ export default class EventsConsumer {
 
   async process(event: Event): Promise<void> {
     if (event.type == "create" || event.type == "modify") {
-      const res = await this.client.uploadFile(
+      await this.client.uploadFile(
         this.owner,
         this.repo,
         this.branch,
@@ -21,9 +21,17 @@ export default class EventsConsumer {
       );
       // Reset dirty state
       this.metadataStore.data[event.filePath].dirty = false;
+      // Gets the new SHA of the file
+      const sha = await this.client.getFileSha(
+        this.owner,
+        this.repo,
+        this.branch,
+        event.filePath,
+      );
+      this.metadataStore.data[event.filePath].sha = sha;
       this.metadataStore.save();
     } else if (event.type == "delete") {
-      const res = await this.client.deleteFile(
+      await this.client.deleteFile(
         this.owner,
         this.repo,
         this.branch,

src/github/client.ts

@@ -155,6 +155,29 @@ export default class GithubClient {
     }
   }
 
+  /**
+   * Gets the SHA of a file in the remote repo given its local path.
+   *
+   * @param owner Owner of the repo
+   * @param repo Name of the repo
+   * @param branch Branch to download from
+   * @param filePath local file path to upload
+   * @returns sha of the file as string
+   */
+  async getFileSha(
+    owner: string,
+    repo: string,
+    branch: string,
+    filePath: string,
+  ) {
+    const { remotePath } = this.metadataStore.data[filePath];
+    const res = await requestUrl({
+      url: `https://api.github.com/repos/${owner}/${repo}/contents/${remotePath}?ref=${branch}`,
+      headers: this.headers(),
+    });
+    return res.json.sha;
+  }
+
   /**
    * Delete a single file from GitHub.
    * All the file information needed to delete the file is take form the metadata store.