7842 - new directory organization

Baremetal is now the default build target and therefore has its sources
at the top-level. Baremetal programs build using the phase-2 Mu toolchain
that requires a Linux kernel. This phase-2 codebase which used to be at
the top-level is now under the linux/ directory. Finally, the phase-2 toolchain,
while self-hosting, has a way to bootstrap from a C implementation, which
is now stored in linux/bootstrap. The bootstrap C implementation uses some
literate programming tools that are now in linux/bootstrap/tools.

So the whole thing has gotten inverted. Each directory should build one
artifact and include the main sources (along with standard library). Tools
used for building it are relegated to sub-directories, even though those
tools are often useful in their own right, and have had lots of interesting
programs written using them.

A couple of things have gotten dropped in this process:
  - I had old ways to run on just a Linux kernel, or with a Soso kernel.
    No more.
  - I had some old tooling for running a single test at the cursor. I haven't
    used that lately. Maybe I'll bring it back one day.

The reorg isn't done yet. Still to do:
  - redo documentation everywhere. All the README files, all other markdown,
    particularly vocabulary.md.
  - clean up how-to-run comments at the start of programs everywhere
  - rethink what to do with the html/ directory. Do we even want to keep
    supporting it?

In spite of these shortcomings, all the scripts at the top-level, linux/
and linux/bootstrap are working. The names of the scripts also feel reasonable.
This is a good milestone to take stock at.

1 files changed, 26 insertions, 0 deletions

diff --git a/linux/bootstrap/tools/enumerate.cc b/linux/bootstrap/tools/enumerate.cc
new file mode 100644
index 00000000..2777c407
--- /dev/null
+++ b/linux/bootstrap/tools/enumerate.cc
@@ -0,0 +1,26 @@
+#include<assert.h>
+#include<cstdlib>
+#include<dirent.h>
+#include<vector>
+using std::vector;
+#include<string>
+using std::string;
+#include<iostream>
+using std::cout;
+
+int main(int argc, const char* argv[]) {
+  assert(argc == 3);
+  assert(string(argv[1]) == "--until");
+  string last_file(argv[2]);
+
+  dirent** files;
+  int num_files = scandir(".", &files, NULL, alphasort);
+  for (int i = 0; i < num_files; ++i) {
+    string curr_file = files[i]->d_name;
+    if (!isdigit(curr_file.at(0))) continue;
+    if (!last_file.empty() && curr_file > last_file) break;
+    cout << curr_file << '\n';
+  }
+  // don't bother freeing files
+  return 0;
+}