Checkpoint

src/libfetchers/input-accessor.hh

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "ref.hh"
+#include "types.hh"
+#include "archive.hh"
+
+namespace nix {
+
+struct InputAccessor
+{
+    const size_t number;
+
+    InputAccessor();
+
+    virtual ~InputAccessor()
+    { }
+
+    virtual std::string readFile(std::string_view path) = 0;
+
+    virtual bool pathExists(std::string_view path) = 0;
+
+    enum Type { tRegular, tSymlink, tDirectory, tMisc };
+
+    struct Stat
+    {
+        Type type = tMisc;
+        //uint64_t fileSize = 0; // regular files only
+        bool isExecutable = false; // regular files only
+    };
+
+    virtual Stat lstat(std::string_view path) = 0;
+
+    typedef std::optional<Type> DirEntry;
+
+    typedef std::map<std::string, DirEntry> DirEntries;
+
+    virtual DirEntries readDirectory(std::string_view path) = 0;
+
+    virtual std::string readLink(std::string_view path) = 0;
+
+    virtual void dumpPath(
+        const Path & path,
+        Sink & sink,
+        PathFilter & filter = defaultPathFilter);
+};
+
+ref<InputAccessor> makeFSInputAccessor(const Path & root);
+
+struct SourcePath
+{
+    ref<InputAccessor> accessor;
+    Path path;
+};
+
+std::ostream & operator << (std::ostream & str, const SourcePath & path);
+
+}