legacy: Builder now support parsing of compiler output

Author: cmaglie

Diff for: legacy/builder/builder_utils/utils.go

@@ -198,6 +198,12 @@ func compileFileWithRecipe(ctx *types.Context, sourcePath *paths.Path, source *p
 		}
 		ctx.WriteStderr(stderr)
 
+		// Parse the output of the compiler to gather errors and warnings...
+		if ctx.CompilerOutputParser != nil {
+			ctx.CompilerOutputParser(command.Args, stdout)
+			ctx.CompilerOutputParser(command.Args, stderr)
+		}
+
 		// ...and then return the error
 		if err != nil {
 			return nil, errors.WithStack(err)

Diff for: legacy/builder/types/context.go

@@ -161,6 +161,10 @@ type Context struct {
 	// The provided source data is used instead of reading it from disk.
 	// The keys of the map are paths relative to sketch folder.
 	SourceOverride map[string]string
+
+	// This is a function used to parse the output of the compiler
+	// It is used to extract errors and warnings
+	CompilerOutputParser func(cmdline []string, out []byte)
 }
 
 // ExecutableSectionSize represents a section of the executable output file