From 0365b0e2a284f1121b4619aed71aede7b3bd0630 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Fri, 29 Dec 2023 01:21:17 +0100
Subject: [PATCH] Generate a friendly error if a project contains no source
 files.

Closes #86.
---
 src/sdk/build/Vezel.Zig.Sdk.Build.targets  | 3 +++
 src/sdk/build/Vezel.Zig.Sdk.Format.targets | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/sdk/build/Vezel.Zig.Sdk.Build.targets b/src/sdk/build/Vezel.Zig.Sdk.Build.targets
index c8d7b03..4707556 100644
--- a/src/sdk/build/Vezel.Zig.Sdk.Build.targets
+++ b/src/sdk/build/Vezel.Zig.Sdk.Build.targets
@@ -39,6 +39,9 @@
         <CallTarget Targets="$(_FormatTarget)"
                     Condition="'$(_FormatTarget)' != ''" />
 
+        <Error Text="No source files in project."
+               Condition="@(Compile->Count()) == 0" />
+
         <ZigCompile AccessControl="$(AccessControl)"
                     BlockExtensions="$(BlockExtensions)"
                     CommandFragmentsDirectory="$(_CommandFragmentsPath)"
diff --git a/src/sdk/build/Vezel.Zig.Sdk.Format.targets b/src/sdk/build/Vezel.Zig.Sdk.Format.targets
index cccdea5..4a73d21 100644
--- a/src/sdk/build/Vezel.Zig.Sdk.Format.targets
+++ b/src/sdk/build/Vezel.Zig.Sdk.Format.targets
@@ -1,6 +1,6 @@
 <Project>
     <Target Name="_CheckFormat"
-            Condition="'$(CompilerMode)' == 'Zig'">
+            Condition="'$(CompilerMode)' == 'Zig' and @(ZigSource->Count()) != 0">
         <ZigFormat FormatterMode="Check"
                    Sources="@(ZigSource)"
                    StandardOutputImportance="high"
@@ -8,7 +8,7 @@
     </Target>
 
     <Target Name="Format"
-            Condition="'$(CompilerMode)' == 'Zig'">
+            Condition="'$(CompilerMode)' == 'Zig' and @(ZigSource->Count()) != 0">
         <ZigFormat FormatterMode="Execute"
                    Sources="@(ZigSource)"
                    ToolExe="$(ZigExePath)" />