Adds nix flake, adds tooling for creating a deployment of microzig, v…

…endors some code from ezpkg

.gitignore

@@ -1,5 +1,6 @@
 zig-out/
 zig-cache/
+microzig-deploy/
 .DS_Store
 .gdbinit
 .lldbinit

README.md

@@ -0,0 +1,19 @@
+# MicroZig
+
+## Overview
+
+- `core/` contains the shared components of MicroZig.
+- `board-support/` contains all official board support package.
+- `examples/` contains examples that can be used with the board support packages.
+- `tools/` contains tooling to work *on* MicroZig.
+
+## Versioning Scheme
+
+MicroZig versions are tightly locked with Zig versions.
+
+The general scheme is `${zig_version}-${commit}-${count}`, so the MicroZig versions will look really similar to
+Zigs versions, but with our own commit abbreviations and counters.
+
+As MicroZig sticks to tagged Zig releases, `${zig_version}` will show to which Zig version the MicroZig build is compatible.
+
+Consider the version `0.11.0-abcdef-123` means that this MicroZig version has a commit starting with `abcdef`, which was the 123rd commit of the version that is compatible with Zig 0.11.0.

build.zig

@@ -0,0 +1,20 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    buildTools(b);
+}
+
+fn buildTools(b: *std.Build) void {
+    const tools_step = b.step("tools", "Only build the development tools");
+    b.getInstallStep().dependOn(tools_step);
+
+    const archive_info = b.addExecutable(.{
+        .name = "archive-info",
+        .optimize = .ReleaseSafe,
+        .root_source_file = .{ .path = "tools/archive-info.zig" },
+    });
+
+    tools_step.dependOn(&b.addInstallArtifact(archive_info, .{
+        .dest_dir = .{ .override = .{ .custom = "tools" } },
+    }).step);
+}

flake.nix

@@ -0,0 +1,62 @@
+{
+  description = "microzig development environment";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/release-23.05";
+    flake-utils.url = "github:numtide/flake-utils";
+
+    # required for latest zig
+    zig.url = "github:mitchellh/zig-overlay";
+
+    # Used for shell.nix
+    flake-compat = {
+      url = github:edolstra/flake-compat;
+      flake = false;
+    };
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    ...
+  } @ inputs: let
+    overlays = [
+      # Other overlays
+      (final: prev: {
+        zigpkgs = inputs.zig.packages.${prev.system};
+      })
+    ];
+
+    # Our supported systems are the same supported systems as the Zig binaries
+    systems = builtins.attrNames inputs.zig.packages;
+  in
+    flake-utils.lib.eachSystem systems (
+      system: let
+        pkgs = import nixpkgs {inherit overlays system;};
+      in rec {
+        devShells.default = pkgs.mkShell {
+          nativeBuildInputs = [
+            pkgs.zigpkgs."0.11.0"
+          ];
+
+          buildInputs = [
+            # we need a version of bash capable of being interactive
+            # as opposed to a bash just used for building this flake
+            # in non-interactive mode
+            pkgs.bashInteractive
+            pkgs.zlib
+          ];
+
+          shellHook = ''
+            # once we set SHELL to point to the interactive bash, neovim will
+            # launch the correct $SHELL in its :terminal
+            export SHELL=${pkgs.bashInteractive}/bin/bash
+          '';
+        };
+
+        # For compatibility with older versions of the `nix` binary
+        devShell = self.devShells.${system}.default;
+      }
+    );
+}