Lua 5.1 minimum compatibility

.github/workflows/luacheck.yml

@@ -8,6 +8,6 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Luacheck
-        uses: lunarmodules/luacheck@v0
+        uses: lunarmodules/luacheck@v1

.luacheckrc

@@ -1,4 +1,4 @@
-std = "max"
+std = "min+sile"
 include_files = {
   "**/*.lua",
   "sile.in",
@@ -19,15 +19,6 @@ exclude_files = {
 files["**/*_spec.lua"] = {
   std = "+busted"
 }
-globals = {
-  "SILE",
-  "SU",
-  "luautf8",
-  "pl",
-  "fluent",
-  "SYSTEM_SILE_PATH",
-  "SHARED_LIB_EXT"
-}
 max_line_length = false
 ignore = {
   "581" -- operator order warning doesn't account for custom table metamethods

packages/framebox/graphics/rough.lua

@@ -21,7 +21,7 @@ local function _offsetOpt(x, ops, roughnessGain)
 end
 
 local function _line(x1, y1, x2, y2, o, move, overlay) -- returns an array of operations
-  local lengthSq = math.pow((x1 - x2), 2) + math.pow((y1 - y2), 2)
+  local lengthSq = (x1 - x2)^2 + (y1 - y2)^2
   local length = math.sqrt(lengthSq)
   local roughnessGain
   if length < 200 then

ptable.sile-2.0.1-1.rockspec

@@ -0,0 +1,33 @@
+rockspec_format = "3.0"
+package = "ptable.sile"
+version = "2.0.1-1"
+source = {
+  url = "git+https://github.com/Omikhleia/ptable.sile.git",
+  tag = "v2.0.1",
+}
+description = {
+  summary = "Paragraph boxes, framed boxes and table packages for the SILE typesetting system.",
+  detailed = [[
+    This package for the SILE typesetter provides struts, paragraph boxes
+    (parbox), framed boxes (framebox) and tables (ptable).
+  ]],
+  homepage = "https://github.com/Omikhleia/ptable.sile",
+  license = "MIT",
+}
+dependencies = {
+  "lua >= 5.1",
+  "silex.sile >= 0.1.0",
+}
+build = {
+  type = "builtin",
+  modules = {
+    ["sile.packages.struts"]                      = "packages/struts/init.lua",
+    ["sile.packages.parbox"]                      = "packages/parbox/init.lua",
+    ["sile.packages.ptable"]                      = "packages/ptable/init.lua",
+    ["sile.packages.framebox"]                    = "packages/framebox/init.lua",
+    ["sile.packages.framebox.graphics.prng"]      = "packages/framebox/graphics/prng.lua",
+    ["sile.packages.framebox.graphics.renderer"]  = "packages/framebox/graphics/renderer.lua",
+    ["sile.packages.framebox.graphics.rough"]     = "packages/framebox/graphics/rough.lua",
+    ["sile.resilient-compat.hboxing"]             = "resilient-compat/hboxing.lua",
+  }
+}