Refactor filesystem abstraction to and use it in production

build-files.txt

@@ -47,6 +47,8 @@ source/dub/internal/dyaml/style.d
 source/dub/internal/dyaml/tagdirective.d
 source/dub/internal/dyaml/token.d
 source/dub/internal/git.d
+source/dub/internal/io/filesystem.d
+source/dub/internal/io/realfs.d
 source/dub/internal/libInputVisitor.d
 source/dub/internal/sdlang/ast.d
 source/dub/internal/sdlang/exception.d

source/dub/dub.d

@@ -376,15 +376,15 @@ class Dub {
 		import dub.test.base : TestDub;
 
 		scope (exit) environment.remove("DUB_REGISTRY");
-		auto dub = new TestDub(null, ".", null, SkipPackageSuppliers.configured);
+		auto dub = new TestDub(null, "/dub/project/", null, SkipPackageSuppliers.configured);
 		assert(dub.packageSuppliers.length == 0);
 		environment["DUB_REGISTRY"] = "http://example.com/";
-		dub = new TestDub(null, ".", null, SkipPackageSuppliers.configured);
+		dub = new TestDub(null, "/dub/project/", null, SkipPackageSuppliers.configured);
 		assert(dub.packageSuppliers.length == 1);
 		environment["DUB_REGISTRY"] = "http://example.com/;http://foo.com/";
-		dub = new TestDub(null, ".", null, SkipPackageSuppliers.configured);
+		dub = new TestDub(null, "/dub/project/", null, SkipPackageSuppliers.configured);
 		assert(dub.packageSuppliers.length == 2);
-		dub = new TestDub(null, ".", [new RegistryPackageSupplier(URL("http://bar.com/"))], SkipPackageSuppliers.configured);
+		dub = new TestDub(null, "/dub/project/", [new RegistryPackageSupplier(URL("http://bar.com/"))], SkipPackageSuppliers.configured);
 		assert(dub.packageSuppliers.length == 3);
 
 		dub = new TestDub();

source/dub/internal/io/filesystem.d

@@ -0,0 +1,96 @@
+/**
+ * An abstract filesystem representation
+ *
+ * This interface allows to represent the file system to various part of Dub.
+ * Instead of direct use of `std.file`, an implementation of this interface can
+ * be used, allowing to mock all I/O in unittest on a thread-local basis.
+ */
+module dub.internal.io.filesystem;
+
+public import std.datetime.systime;
+
+public import dub.internal.vibecompat.inet.path;
+
+/// Ditto
+public interface Filesystem
+{
+    static import dub.internal.vibecompat.core.file;
+
+    /// TODO: Remove, the API should be improved
+    public alias IterateDirDg = int delegate(
+        scope int delegate(ref dub.internal.vibecompat.core.file.FileInfo));
+
+    /// Ditto
+    public IterateDirDg iterateDirectory (in NativePath path) scope;
+
+    /// Returns: The `path` of this FSEntry
+    public abstract NativePath getcwd () const scope;
+
+    /**
+     * Implements `mkdir -p`: Create a directory and every intermediary
+     *
+     * There is no way to error out on intermediate directory,
+     * like standard mkdir does. If you want this behavior,
+     * simply check (`existsDirectory`) if the parent directory exists.
+     *
+     * Params:
+     *   path = The path of the directory to be created.
+     */
+    public abstract void mkdir (in NativePath path) scope;
+
+    /// Checks the existence of a file
+    public abstract bool existsFile (in NativePath path) const scope;
+
+    /// Checks the existence of a directory
+    public abstract bool existsDirectory (in NativePath path) const scope;
+
+    /// Reads a file, returns the content as `ubyte[]`
+    public abstract ubyte[] readFile (in NativePath path) const scope;
+
+    /// Reads a file, returns the content as text
+    public abstract string readText (in NativePath path) const scope;
+
+    /// Write to this file
+    public final void writeFile (in NativePath path, const(char)[] data) scope
+    {
+        import std.string : representation;
+
+        this.writeFile(path, data.representation);
+    }
+
+    /// Ditto
+    public abstract void writeFile (in NativePath path, const(ubyte)[] data) scope;
+
+    /** Remove a file
+     *
+     * Always error if the target is a directory.
+     * Does not error if the target does not exists
+     * and `force` is set to `true`.
+     *
+     * Params:
+     *   path = Path to the file to remove
+     *   force = Whether to ignore non-existing file,
+     *           default to `false`.
+     */
+    public void removeFile (in NativePath path, bool force = false);
+
+    /** Remove a directory
+     *
+     * Remove an existing empty directory.
+     * If `force` is set to `true`, no error will be thrown
+     * if the directory is empty or non-existing.
+     *
+     * Params:
+     *   path = Path to the directory to remove
+     *   force = Whether to ignore non-existing / non-empty directories,
+     *           default to `false`.
+     */
+    public void removeDir (in NativePath path, bool force = false);
+
+    /// Implement `std.file.setTimes`
+    public void setTimes (in NativePath path, in SysTime accessTime,
+        in SysTime modificationTime);
+
+    /// Implement `std.file.setAttributes`
+    public void setAttributes (in NativePath path, uint attributes);
+}