From 00a99098d3eb4a1e0ba39e4b2514233350abc715 Mon Sep 17 00:00:00 2001
From: Rolf Bjarne Kvinge <rolf@xamarin.com>
Date: Mon, 3 Mar 2025 08:20:48 +0100
Subject: [PATCH] [devops] Install .NET before trying to install simulators.

Because installing simulators means running a C# project, which requires .NET to build.

Also improve the .NET version check systemdependencies.sh to not blindly try
to execute `dotnet`, but check for its presence first.

This fixes a couple of issues on bots that don't have .NET installed.
---
 system-dependencies.sh                                    | 8 ++++++--
 tools/devops/automation/templates/tests/build.yml         | 4 ++++
 tools/devops/automation/templates/windows/reserve-mac.yml | 4 ++++
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/system-dependencies.sh b/system-dependencies.sh
index 361d179dcc2b..5c48d3cc66be 100755
--- a/system-dependencies.sh
+++ b/system-dependencies.sh
@@ -964,8 +964,12 @@ check_7z
 check_objective_sharpie
 check_old_simulators
 if test -z "$IGNORE_DOTNET"; then
-	ok "Installed .NET SDKs:"
-	(IFS=$'\n'; for i in $(/usr/local/share/dotnet/dotnet --list-sdks); do log "$i"; done)
+	if test -f /usr/local/share/dotnet/dotnet; then
+		ok "Installed .NET SDKs:"
+		(IFS=$'\n'; for i in $(/usr/local/share/dotnet/dotnet --list-sdks); do log "$i"; done)
+	else
+		warn ".NET is not installed"
+	fi
 fi
 
 if test -z $FAIL; then
diff --git a/tools/devops/automation/templates/tests/build.yml b/tools/devops/automation/templates/tests/build.yml
index 977182bf47ea..99fb3f27d301 100644
--- a/tools/devops/automation/templates/tests/build.yml
+++ b/tools/devops/automation/templates/tests/build.yml
@@ -230,6 +230,10 @@ steps:
     github_token: ${{ parameters.gitHubToken }}
   timeoutInMinutes: 250
 
+- task: UseDotNet@2
+  inputs:
+    version: 9.x
+
 - bash: |
     set -x
     set -e
diff --git a/tools/devops/automation/templates/windows/reserve-mac.yml b/tools/devops/automation/templates/windows/reserve-mac.yml
index e315acde4894..0a6540c41dc2 100644
--- a/tools/devops/automation/templates/windows/reserve-mac.yml
+++ b/tools/devops/automation/templates/windows/reserve-mac.yml
@@ -102,6 +102,10 @@ steps:
     github_token: ${{ parameters.gitHubToken }}
   timeoutInMinutes: 250
 
+- task: UseDotNet@2
+  inputs:
+    version: 9.x
+
 - bash: $(Build.SourcesDirectory)/$(BUILD_REPOSITORY_TITLE)/system-dependencies.sh --ignore-mono --ignore-visual-studio --ignore-mono --ignore-sharpie --ignore-shellcheck --ignore-yamllint --provision-simulators
   displayName: 'Provision simulators'
   timeoutInMinutes: 250