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, 0 insertions, 46 deletions

diff --git a/baremetal/ex7.mu b/baremetal/ex7.mu
deleted file mode 100644
index 30e3c1bc..00000000
--- a/baremetal/ex7.mu
+++ /dev/null
@@ -1,46 +0,0 @@
-# Cursor-based motions.
-#
-# To build a disk image:
-#   ./translate_mu_baremetal baremetal/ex7.mu     # emits disk.img
-# To run:
-#   qemu-system-i386 disk.img
-# Or:
-#   bochs -f baremetal/boot.bochsrc               # boot.bochsrc loads disk.img
-#
-# Expected output: an interactive game a bit like "snakes". Try pressing h, j,
-# k, l.
-
-fn main {
-  var space/eax: grapheme <- copy 0x20
-  set-cursor-position 0/screen, 0, 0
-  {
-    show-cursor 0/screen, space
-    var key/eax: byte <- read-key 0/keyboard
-    {
-      compare key, 0x68/h
-      break-if-!=
-      draw-code-point-at-cursor 0/screen, 0x2d/dash, 0x31/fg, 0/bg
-      move-cursor-left 0
-    }
-    {
-      compare key, 0x6a/j
-      break-if-!=
-      draw-code-point-at-cursor 0/screen, 0x7c/vertical-bar, 0x31/fg, 0/bg
-      move-cursor-down 0
-    }
-    {
-      compare key, 0x6b/k
-      break-if-!=
-      draw-code-point-at-cursor 0/screen, 0x7c/vertical-bar, 0x31/fg, 0/bg
-      move-cursor-up 0
-    }
-    {
-      compare key, 0x6c/l
-      break-if-!=
-      var g/eax: code-point <- copy 0x2d/dash
-      draw-code-point-at-cursor 0/screen, 0x2d/dash, 0x31/fg, 0/bg
-      move-cursor-right 0
-    }
-    loop
-  }
-}