From 3152c0c656a97fa889a103473c2467b73dddceec Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Thu, 30 Jan 2025 09:41:30 +0100
Subject: [PATCH] resolve unrecognized x.y r versions to x.y.0

R.deb download step requires a full x.y.z version, it will 404 on `r-4.4`
---
 repo2docker/buildpacks/r.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/repo2docker/buildpacks/r.py b/repo2docker/buildpacks/r.py
index c3b92739..7d80082a 100644
--- a/repo2docker/buildpacks/r.py
+++ b/repo2docker/buildpacks/r.py
@@ -99,6 +99,9 @@ def r_version(self):
                 # available. Users can however explicitly specify the full version to get something specific
                 if r_version in version_map:
                     r_version = version_map[r_version]
+                elif len(r_version.split(".")) == 1:
+                    # must have x.y.z version, add .0 for unrecognized (future) R versions
+                    r_version += ".0"
 
             # translate to the full version string
             self._r_version = r_version