Running builds sequentially (#24)

Co-authored-by: Alex Guretzki <alexander.guretzki@adyen.com>

Author: goergisn

Sources/Pipeline/Pipeline.swift

@@ -83,20 +83,19 @@ struct Pipeline {
 private extension Pipeline {
 
     func buildProjects(oldSource: ProjectSource, newSource: ProjectSource, scheme: String?) async throws -> (URL, URL) {
-        async let oldBuildResult = try projectBuilder.build(
+        
+        // We don't run them in parallel to not conflict with resolving dependencies concurrently
+        
+        let oldProjectUrl = try await projectBuilder.build(
             source: oldProjectSource,
             scheme: scheme
         )
 
-        async let newBuildResult = try projectBuilder.build(
+        let newProjectUrl = try await projectBuilder.build(
             source: newProjectSource,
             scheme: scheme
         )
 
-        // Awaiting the result of the async builds
-        let oldProjectUrl = try await oldBuildResult
-        let newProjectUrl = try await newBuildResult
-        
         return (oldProjectUrl, newProjectUrl)
     }