ci: bump action and tool pins, add Lua 5.5 to the test matrix

.github/workflows/build.yml

@@ -15,30 +15,30 @@ jobs:
     runs-on: ubuntu-26.04
     name: Check
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup Lua
-        uses: leafo/gh-actions-lua@v11
+        uses: leafo/gh-actions-lua@v13
         with:
           luaVersion: '5.4'
 
       - name: Setup LuaRocks
-        uses: leafo/gh-actions-luarocks@v5
+        uses: leafo/gh-actions-luarocks@v6
         with:
-          luarocksVersion: "3.12.2"
+          luarocksVersion: "3.13.0"
 
       - name: Install luacheck
         run: luarocks install luacheck
 
       - name: Install stylua
-        uses: JohnnyMorganz/stylua-action@v4
+        uses: JohnnyMorganz/stylua-action@v5
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          version: v2.1.0
+          version: v2.6.0
           args: false # Will be run as part of `make check`
 
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v7
         with:
           python-version: '3.12'
 
@@ -54,7 +54,7 @@ jobs:
             | tar -xz -C "$RUNNER_TEMP"
           echo "$RUNNER_TEMP/bin" >> "$GITHUB_PATH"
         env:
-          LUALS: 3.19.0
+          LUALS: 3.19.2
 
       - name: Check
         run: make check
@@ -72,14 +72,14 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        lua-version: ['5.1', '5.2', '5.3', '5.4', 'luajit-2.0', 'luajit-2.1']
+        lua-version: ['5.1', '5.2', '5.3', '5.4', '5.5', 'luajit-2.0', 'luajit-2.1']
 
     name: Lua ${{ matrix.lua-version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup Lua
-        uses: leafo/gh-actions-lua@v11
+        uses: leafo/gh-actions-lua@v13
         with:
           # The 'luajit-2.1' target tracks a rolling HEAD which has miscompiled
           # the signed arithmetic-shift edge cases in zigzag encoding (arshift of
@@ -108,17 +108,17 @@ jobs:
     runs-on: ubuntu-26.04
     name: Build Combined Module
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup Lua
-        uses: leafo/gh-actions-lua@v11
+        uses: leafo/gh-actions-lua@v13
         with:
           luaVersion: '5.4'
 
       - name: Setup LuaRocks
-        uses: leafo/gh-actions-luarocks@v5
+        uses: leafo/gh-actions-luarocks@v6
         with:
-          luarocksVersion: "3.12.2"
+          luarocksVersion: "3.13.0"
 
       - name: Install amalg
         run: luarocks install amalg
@@ -151,7 +151,7 @@ jobs:
           fi
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: protobuf.lua
           path: build/protobuf.lua

.github/workflows/release.yml

@@ -13,19 +13,19 @@ jobs:
     runs-on: ubuntu-26.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0
 
       - name: Setup Lua
-        uses: leafo/gh-actions-lua@v11
+        uses: leafo/gh-actions-lua@v13
         with:
           luaVersion: '5.4'
 
       - name: Setup LuaRocks
-        uses: leafo/gh-actions-luarocks@v5
+        uses: leafo/gh-actions-luarocks@v6
         with:
-          luarocksVersion: "3.12.2"
+          luarocksVersion: "3.13.0"
 
       - name: Install amalg
         run: luarocks install amalg
@@ -36,7 +36,7 @@ jobs:
           make build
 
       - name: Create Release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v3
         with:
           draft: false
           prerelease: ${{ contains(github.ref_name, '-rc') || contains(github.ref_name, '-beta') || contains(github.ref_name, '-alpha') }}

CLAUDE.md

@@ -123,7 +123,7 @@ local `.luarc.json`. Re-run both enumerations when upgrading the server rather t
 assuming this list stayed complete.
 
 The server version is not pinned locally, though. `install-deps` takes whatever
-Homebrew has while CI pins 3.19.0, so compare the version the target prints if a
+Homebrew has while CI pins 3.19.2, so compare the version the target prints if a
 local result disagrees with CI.
 
 `vendor/` is both a `library` and an `ignoreDir`, which is load-bearing: with only
@@ -137,7 +137,7 @@ deprecated, which fails the gate. So the pin keeps this repo's own cross-version
 shims from tripping it.
 
 Part of `check`, so CI enforces it. CI pins the server version so the count cannot
-move under an upstream release; 3.18.2 and 3.19.0 agree here.
+move under an upstream release; 3.18.2, 3.19.0 and 3.19.2 agree here.
 
 ## Architecture
 
@@ -468,9 +468,9 @@ Version is automatically injected from git tags during release.
 
 - **build.yml**: Runs on push/PR to `main` or `master`
   - `check` job — `make check`: format-check, luacheck, check-types, check-schema,
-    and typecheck against lua-language-server 3.19.0, then `make check-wire-vectors`
+    and typecheck against lua-language-server 3.19.2, then `make check-wire-vectors`
     and `make check-float-vectors`
-  - `test` job — `make test-all` across Lua 5.1-5.4, LuaJIT 2.0/2.1
+  - `test` job — `make test-all` across Lua 5.1-5.5, LuaJIT 2.0/2.1
   - `build` job — single-file distributions
   - The `luajit-2.1` matrix entry is silently built as **`luajit-openresty`**:
     rolling LuaJIT HEAD miscompiled the signed arithmetic-shift edge cases in
@@ -481,8 +481,8 @@ Version is automatically injected from git tags during release.
   and `build/protobuf-portable.lua`.
 
 `make test-matrix` locally pins `5.1.5 5.2.4 5.3.6 5.4.8 luajit-2.1-dev` and needs
-`luaenv` plus the `luaenv-luarocks` plugin. It does **not** cover LuaJIT 2.0,
-which CI does.
+`luaenv` plus the `luaenv-luarocks` plugin. It does **not** cover Lua 5.5 or
+LuaJIT 2.0, which CI does.
 
 ## Code Style
 

README.md

@@ -2,7 +2,7 @@
 
 A pure Lua implementation of Protocol Buffers encoding and decoding with **zero
 external dependencies**. This library provides a lightweight, portable
-implementation that runs on Lua 5.1, 5.2, 5.3, 5.4, and LuaJIT.
+implementation that runs on Lua 5.1, 5.2, 5.3, 5.4, 5.5, and LuaJIT.
 
 ## Features