libutil: convert readFileSource to a generator

Change-Id: I5f92b15fd367d46eb047d74ab6e317b4f51a46d3

1 files changed, 2 insertions, 7 deletions

diff --git a/src/libutil/file-system.cc b/src/libutil/file-system.cc
index 871707468..13c2b27eb 100644
--- a/src/libutil/file-system.cc
+++ b/src/libutil/file-system.cc
@@ -289,17 +289,12 @@ std::string readFile(const Path & path)
 }
 
 
-box_ptr<Source> readFileSource(const Path & path)
+Generator<Bytes> readFileSource(const Path & path)
 {
     AutoCloseFD fd{open(path.c_str(), O_RDONLY | O_CLOEXEC)};
     if (!fd)
         throw SysError("opening file '%s'", path);
-
-    struct FileSource : FdSource {
-        AutoCloseFD fd;
-        explicit FileSource(AutoCloseFD fd) : FdSource(fd.get()), fd(std::move(fd)) {}
-    };
-    return make_box_ptr<FileSource>(std::move(fd));
+    co_yield drainFDSource(fd.get());
 }