From 2a927b38c061b6b3f5220dac9d32fb999a017a93 Mon Sep 17 00:00:00 2001
From: Oscar Cowdery Lack <oscar.cowderylack@gmail.com>
Date: Sun, 10 Apr 2022 10:35:39 +1000
Subject: [PATCH] Fall back to /usr/lib/os-release if /etc/os-release doesn't
 exist

From https://www.freedesktop.org/software/systemd/man/os-release.html:

> The file /etc/os-release takes precedence over /usr/lib/os-release.
> Applications should check for the former, and exclusively use its data
> if it exists, and only fall back to /usr/lib/os-release if it is
> missing.
---
 scripts/platform.cake                      | 16 ++++++++++++++--
 src/OmniSharp.Shared/Utilities/Platform.cs |  7 ++++++-
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/scripts/platform.cake b/scripts/platform.cake
index 2338675b81..31e1ef8d8e 100644
--- a/scripts/platform.cake
+++ b/scripts/platform.cake
@@ -105,11 +105,23 @@ public sealed class Platform
 
     private static void ReadDistroNameAndVersion(out string distroName, out Version version)
     {
-        var lines = System.IO.File.ReadAllLines("/etc/os-release");
-
         distroName = null;
         version = null;
 
+        string OS_Release_Path = "/etc/os-release";
+
+        if (!System.IO.File.Exists(OS_Release_Path))
+        {
+            OS_Release_Path = "/usr/lib/os-release";
+        }
+
+        if (!System.IO.File.Exists(OS_Release_Path))
+        {
+            return;
+        }
+
+        var lines = System.IO.File.ReadAllLines(OS_Release_Path);
+
         foreach (var line in lines)
         {
             var equalsIndex = line.IndexOf('=');
diff --git a/src/OmniSharp.Shared/Utilities/Platform.cs b/src/OmniSharp.Shared/Utilities/Platform.cs
index 2b9eda18f7..1a483e57e9 100644
--- a/src/OmniSharp.Shared/Utilities/Platform.cs
+++ b/src/OmniSharp.Shared/Utilities/Platform.cs
@@ -136,7 +136,12 @@ private static void ReadDistroNameAndVersion(out string distroName, out Version
             version = null;
 
             // Details: https://www.freedesktop.org/software/systemd/man/os-release.html
-            const string OS_Release_Path = "/etc/os-release";
+            string OS_Release_Path = "/etc/os-release";
+
+            if (!File.Exists(OS_Release_Path))
+            {
+                OS_Release_Path = "/usr/lib/os-release";
+            }
 
             if (!File.Exists(OS_Release_Path))
             {