From ee33db0798a8d840b21d042e63f976f027078bc7 Mon Sep 17 00:00:00 2001
From: Aditya Patwardhan <adityap@microsoft.com>
Date: Tue, 14 Aug 2018 13:21:26 -0700
Subject: [PATCH] Fix building on RedHat Enterprise Linux (#7489)

When trying to build on RHEL, the environment is not recognized as RedHatFamily.
Added detection logic so that appropriate symbolic links are generated.
---
 build.psm1 | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/build.psm1 b/build.psm1
index 5c20802de9..bdfdc5eca2 100644
--- a/build.psm1
+++ b/build.psm1
@@ -140,9 +140,11 @@ function Get-EnvironmentInformation
         $environment += @{'IsFedora' = $LinuxInfo.ID -match 'fedora' -and $LinuxInfo.VERSION_ID -ge 24}
         $environment += @{'IsOpenSUSE' = $LinuxInfo.ID -match 'opensuse'}
         $environment += @{'IsSLES' = $LinuxInfo.ID -match 'sles'}
+        $environment += @{'IsRedHat' = $LinuxInfo.ID -match 'rhel'}
+        $environment += @{'IsRedHat7' = $Environment.IsRedHat -and $LinuxInfo.VERSION_ID -match '7' }
         $environment += @{'IsOpenSUSE13' = $Environmenst.IsOpenSUSE -and $LinuxInfo.VERSION_ID  -match '13'}
         $environment += @{'IsOpenSUSE42.1' = $Environment.IsOpenSUSE -and $LinuxInfo.VERSION_ID  -match '42.1'}
-        $environment += @{'IsRedHatFamily' = $Environment.IsCentOS -or $Environment.IsFedora}
+        $environment += @{'IsRedHatFamily' = $Environment.IsCentOS -or $Environment.IsFedora -or $Environment.IsRedHat}
         $environment += @{'IsSUSEFamily' = $Environment.IsSLES -or $Environment.IsOpenSUSE}
 
         # Workaround for temporary LD_LIBRARY_PATH hack for Fedora 24
@@ -151,6 +153,15 @@ function Get-EnvironmentInformation
             Remove-Item -Force ENV:\LD_LIBRARY_PATH
             Get-ChildItem ENV:
         }
+
+        if( -not(
+            $environment.IsDebian -or
+            $environment.IsUbuntu -or
+            $environmment.IsRedHatFamily -or
+            $environmment.IsSUSEFamily)
+        ) {
+            throw "The current OS : $($LinuxInfo.ID) is not supported for building PowerShell."
+        }
     }
 
     return [PSCustomObject] $environment