feat: Allow checking out repo PRs

src/main/kotlin/commands/rome.kt

@@ -1,6 +1,7 @@
 package moe.nea.firmament.commands
 
 import com.mojang.brigadier.CommandDispatcher
+import com.mojang.brigadier.arguments.IntegerArgumentType
 import com.mojang.brigadier.arguments.StringArgumentType.string
 import io.ktor.client.statement.bodyAsText
 import net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource
@@ -130,6 +131,15 @@ fun firmamentCommand() = literal("firmament") {
 		}
 	}
 	thenLiteral("repo") {
+		thenLiteral("checkpr") {
+			thenArgument("prnum", IntegerArgumentType.integer(1)) { prnum ->
+				thenExecute {
+					val prnum = this[prnum]
+					source.sendFeedback(tr("firmament.repo.reload.pr", "Temporarily reloading repo from PR #${prnum}."))
+					RepoManager.downloadOverridenBranch("refs/pull/$prnum/head")
+				}
+			}
+		}
 		thenLiteral("reload") {
 			thenLiteral("fetch") {
 				thenExecute {

src/main/kotlin/repo/RepoDownloadManager.kt

@@ -1,5 +1,3 @@
-
-
 package moe.nea.firmament.repo
 
 import io.ktor.client.call.body
@@ -55,12 +53,12 @@ object RepoDownloadManager {
 	@Serializable
 	private class GithubCommitsResponse(val sha: String)
 
-    private suspend fun requestLatestGithubSha(): String? {
+	private suspend fun requestLatestGithubSha(branchOverride: String?): String? {
 		if (RepoManager.Config.branch == "prerelease") {
 			RepoManager.Config.branch = "master"
 		}
 		val response =
-            Firmament.httpClient.get("https://api.github.com/repos/${RepoManager.Config.username}/${RepoManager.Config.reponame}/commits/${RepoManager.Config.branch}")
+			Firmament.httpClient.get("https://api.github.com/repos/${RepoManager.Config.username}/${RepoManager.Config.reponame}/commits/${branchOverride ?: RepoManager.Config.branch}")
 		if (response.status.value != 200) {
 			return null
 		}
@@ -79,8 +77,9 @@ object RepoDownloadManager {
 	 * Downloads the latest repository from github, setting [latestSavedVersionHash].
 	 * @return true, if an update was performed, false, otherwise (no update needed, or wasn't able to complete update)
 	 */
-    suspend fun downloadUpdate(force: Boolean): Boolean = withContext(CoroutineName("Repo Update Check")) {
-        val latestSha = requestLatestGithubSha()
+	suspend fun downloadUpdate(force: Boolean, branch: String? = null): Boolean =
+		withContext(CoroutineName("Repo Update Check")) {
+			val latestSha = requestLatestGithubSha(branch)
 			if (latestSha == null) {
 				logger.warn("Could not request github API to retrieve latest REPO sha.")
 				return@withContext false

src/main/kotlin/repo/RepoManager.kt

@@ -102,6 +102,13 @@ object RepoManager {
 
 	fun getNEUItem(skyblockId: SkyblockId): NEUItem? = neuRepo.items.getItemBySkyblockId(skyblockId.neuItem)
 
+	fun downloadOverridenBranch(branch: String) {
+		Firmament.coroutineScope.launch {
+			RepoDownloadManager.downloadUpdate(true, branch)
+			reload()
+		}
+	}
+
 	fun launchAsyncUpdate(force: Boolean = false) {
 		Firmament.coroutineScope.launch {
 			RepoDownloadManager.downloadUpdate(force)