Implemented function scanning

src/scanner/Scan.go

@@ -2,23 +2,26 @@ package scanner
 
 import (
 	"git.urbach.dev/cli/q/src/build"
+	"git.urbach.dev/cli/q/src/core"
 	"git.urbach.dev/cli/q/src/fs"
 )
 
 // Scan scans all the files included in the build.
-func Scan(b *build.Build) (<-chan *fs.File, <-chan error) {
+func Scan(b *build.Build) (<-chan *core.Function, <-chan *fs.File, <-chan error) {
 	s := scanner{
-		files:  make(chan *fs.File),
-		errors: make(chan error),
-		build:  b,
+		functions: make(chan *core.Function),
+		files:     make(chan *fs.File),
+		errors:    make(chan error),
+		build:     b,
 	}
 
 	go func() {
 		s.queue(b.Files...)
 		s.group.Wait()
+		close(s.functions)
 		close(s.files)
 		close(s.errors)
 	}()
 
-	return s.files, s.errors
+	return s.functions, s.files, s.errors
 }