add svn_runner module

.gitignore

@@ -1,2 +1,3 @@
-/Build/
 /.rscons*
+/build/
+/svi

Rsconscript

@@ -0,0 +1,10 @@
+configure do
+  check_d_compiler
+end
+
+build do
+  Environment.new do |env|
+    env["D_IMPORT_PATH"] << "src"
+    env.Program("svi", glob("src/**/*.d"))
+  end
+end

src/main.d

@@ -0,0 +1,8 @@
+import svn_runner;
+import std.stdio;
+
+int main(string[] args)
+{
+    auto r = run_svn(["ls", "https://vcs.gentex.com/svn/embedded_sw"]);
+    return 0;
+}

src/svn_runner.d

@@ -0,0 +1,36 @@
+import std.process;
+import std.stdio;
+
+struct Result
+{
+    int status;
+    char[] stdout;
+    char[] stderr;
+}
+
+private File nullfd()
+{
+    return File("/dev/null", "r");
+}
+
+Result run_svn(string[] args)
+{
+    string[] command = ["svn", "--non-interactive", "--no-auth-cache"] ~ args;
+    auto stdout_pipe = pipe();
+    auto stderr_pipe = pipe();
+    auto pid = spawnProcess(command, nullfd(), stdout_pipe.writeEnd,
+            stderr_pipe.writeEnd);
+    char[] stdout;
+    char[] stderr;
+    char[] buf;
+    while (stdout_pipe.readEnd.readln(buf))
+    {
+        stdout ~= buf;
+    }
+    while (stderr_pipe.readEnd.readln(buf))
+    {
+        stderr ~= buf;
+    }
+    int status = wait(pid);
+    return Result(status, stdout, stderr);
+}