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Reviewing. Successfuly reworked register allocation for tape runs.

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ed
2026-08-18 00:26:36 -04:00
parent 5a4bfb1224
commit da007d342e
19 changed files with 841 additions and 1787 deletions
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scripts/duffle_paths.lua
+9 -15
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@@ -22,12 +22,10 @@ local M = {}
local CACHE_KEY = "__duffle_repo_root__"
--- Resolve the repo root from this script's own path. Zero shell spawn.
--- `duffle_paths.lua` always lives at `<repo>/scripts/duffle_paths.lua`, so the repo root is the
--- parent of the directory containing this script. We derive it directly from `debug.getinfo(1, "S").source`
--- (returns `@<path>` for the currently-running chunk).
--- `duffle_paths.lua` always lives at `<repo>/scripts/duffle_paths.lua`, so the repo root is the parent of the directory containing this script.
--- We derive it directly from `debug.getinfo(1, "S").source` (returns `@<path>` for the currently-running chunk).
---
--- If `debug.getinfo` can't parse this script's path (shouldn't happen — dofile always populates source),
--- return nil and let `M.setup()` fail loud.
--- If `debug.getinfo` can't parse this script's path (shouldn't happen — dofile always populates source), return nil and let `M.setup()` fail loud.
--- @return string|nil
local function find_repo_root()
if package.loaded[CACHE_KEY] then return package.loaded[CACHE_KEY] end
@@ -51,17 +49,13 @@ end
---
--- This script does NOT touch the OS environment: no `os.setenv`, no `os.putenv`, no `$PATH` mods.
--- It just sets `package.path` and `package.cpath` (the standard Lua way to register module search dirs).
--- lpeg is built by `update_deps.ps1` to `toolchain/lpeg/`,
--- which we wire into `package.cpath` here (so `require("lpeg")` from `duffle.lua` resolves without any global state).
--- lpeg is built by `update_deps.ps1` to `toolchain/lpeg/`, which we wire into `package.cpath` here (so `require("lpeg")` from `duffle.lua` resolves without any global state).
function M.setup()
local repo_root = find_repo_root()
if not repo_root then
-- Unreachable in practice: find_repo_root() derives the repo root from this script's
-- own source path via debug.getinfo(1, "S").source (no subprocess, no git CLI, <1ms).
-- A nil return means the source path did not match the expected
-- <repo>/scripts/duffle_paths.lua layout — a packaging bug, not a "missing git repo"
-- condition. os.exit(2) is retained so a real failure surfaces loud rather than
-- silently producing an unconfigured module table.
-- Unreachable in practice: find_repo_root() derives the repo root from this script's own source path via debug.getinfo(1, "S").source (no subprocess, no git CLI, <1ms).
-- A nil return means the source path did not match the expected <repo>/scripts/duffle_paths.lua layout — a packaging bug, not a "missing git repo" condition.
-- os.exit(2) is retained so a real failure surfaces loud rather than silently producing an unconfigured module table.
os.exit(2)
end
@@ -86,6 +80,6 @@ end
-- Run the setup as a side effect.
M.setup()
-- Now that package.path includes scripts/, `require("duffle")` resolves. Return the duffle module
-- so callers can do `local duffle = dofile(...duffle_paths.lua)` in one line.
-- Now that package.path includes scripts/, `require("duffle")` resolves.
-- Return the duffle module so callers can do `local duffle = dofile(...duffle_paths.lua)` in one line.
return require("duffle")