fix truncation of first char of repository name

The existing URL parsing code truncated the first path component up to the 2nd character of the 2nd path component of a repository's name, like `orilla/mux` instead of `github.com/gorilla/mux`.

Author: sqs

src/extension.ts

@@ -17,18 +17,13 @@ export function activate(): void {
             return
         }
 
-        const u = new URL(editor.document.uri)
-        const uri = {
-            repositoryName: u.pathname.slice(2),
-            revision: u.search.slice(1),
-            filePath: u.hash.slice(1),
-        }
+        const uri = resolveURI(editor.document.uri)
 
         const threads = await fetchDiscussionThreads({
             first: 10000,
-            targetRepositoryName: uri.repositoryName,
-            targetRepositoryPath: uri.filePath,
-            relativeRev: uri.revision,
+            targetRepositoryName: uri.repo,
+            targetRepositoryPath: uri.path,
+            relativeRev: uri.rev,
         })
 
         const decorations: sourcegraph.TextDocumentDecoration[] = []
@@ -42,7 +37,7 @@ export function activate(): void {
                 return
             }
             const target: SourcegraphGQL.IDiscussionThreadTargetRepo = thread.target
-            if (target.relativePath !== uri.filePath) {
+            if (target.relativePath !== uri.path) {
                 // TODO(slimsag): shouldn't the discussions API return threads created in different files and moved here, too? lol :facepalm:
                 return // comment has since moved to a different file.
             }

src/uri.ts

@@ -0,0 +1,15 @@
+/**
+ * Resolve a URI of the forms git://github.com/owner/repo?rev#path and file:///path to an absolute reference, using
+ * the given base (root) URI.
+ */
+export function resolveURI(uri: string): { repo: string; rev: string; path: string } {
+    const url = new URL(uri)
+    if (url.protocol === 'git:') {
+        return {
+            repo: (url.host + url.pathname).replace(/^\/*/, '').toLowerCase(),
+            rev: url.search.slice(1).toLowerCase(),
+            path: url.hash.slice(1),
+        }
+    }
+    throw new Error(`unrecognized URI: ${JSON.stringify(uri)} (supported URI schemes: git)`)
+}