Remove luajit, use pre-built Luau binary instead of building from source

Author: levno-710

CONTRIBUTING.md

@@ -12,7 +12,7 @@ Thanks for contributing to Prometheus.
 
 ## Running Tests
 
-Tests run inside a Docker container with lua5.1, upstream LuaJIT (built from source), and Luau:
+Tests run inside a Docker container with lua5.1 and Luau:
 
 ```bash
 ./scripts/run-tests.sh           # Run all tests (default: 10 iterations)

Dockerfile

@@ -3,35 +3,19 @@ FROM ubuntu:24.04
 RUN apt-get update && apt-get install -y \
     lua5.1 \
     git \
-    build-essential \
-    cmake \
-    ninja-build \
     unzip \
     curl \
     && rm -rf /var/lib/apt/lists/*
 
-# Build upstream LuaJIT from source (apt version has fatal bugs incompatible with Prometheus)
-RUN git clone https://luajit.org/git/luajit.git /opt/luajit-src \
-    && cd /opt/luajit-src \
-    && make -j$(nproc) \
-    && make install \
-    && ldconfig \
-    && rm -rf /opt/luajit-src
-
-# Build Luau from source
-RUN git clone https://github.com/luau-lang/luau.git /opt/luau-src \
-    && cd /opt/luau-src \
-    && mkdir build && cd build \
-    && cmake .. -GNinja -DCMAKE_BUILD_TYPE=Release \
-    && ninja \
-    && cp luau /usr/local/bin/luau \
-    && cp luau-analyze /usr/local/bin/luau-analyze 2>/dev/null || true \
-    && cp luau-compile /usr/local/bin/luau-compile 2>/dev/null || true \
-    && cp luau-reduce /usr/local/bin/luau-reduce 2>/dev/null || true \
-    && rm -rf /opt/luau-src
+# Download pre-built Luau binary
+RUN curl -sSLo /tmp/luau-ubuntu.zip \
+    https://github.com/luau-lang/luau/releases/latest/download/luau-ubuntu.zip \
+    && unzip -j /tmp/luau-ubuntu.zip luau -d /usr/local/bin \
+    && chmod +x /usr/local/bin/luau \
+    && rm /tmp/luau-ubuntu.zip
 
 # Verify installations
-RUN lua5.1 -v && luajit -v && printf 'print("luau OK")\n' > /tmp/luau_check.lua && luau /tmp/luau_check.lua && rm /tmp/luau_check.lua
+RUN lua5.1 -v && printf 'print("luau OK")\n' > /tmp/luau_check.lua && luau /tmp/luau_check.lua && rm /tmp/luau_check.lua
 
 WORKDIR /app
 COPY . /app

README.md

@@ -138,7 +138,7 @@ For more advanced use cases, configuration, and presets, see the [documentation]
 
 ## Tests
 
-The test suite runs inside Docker with lua5.1, upstream LuaJIT (built from source), and Luau:
+The test suite runs inside Docker with lua5.1 and Luau:
 
 ```bash
 ./scripts/run-tests.sh           # Run all tests (default: 10 iterations)

docker-test-runner.lua

@@ -29,10 +29,6 @@ local RUNTIMES = {
         name = "lua5.1",
         cmd = "lua5.1",
     },
-    {
-        name = "luajit",
-        cmd = "luajit",
-    },
     {
         name = "luau",
         cmd = "luau",

scripts/run-tests.sh

@@ -14,7 +14,7 @@ usage() {
     cat <<EOF
 Usage: $0 [OPTIONS]
 
-Run Prometheus tests inside a Docker container with lua5.1, upstream luajit, and luau.
+Run Prometheus tests inside a Docker container with lua5.1 and luau.
 
 Options:
   -n N          Number of iterations per test/preset (default: 10)
@@ -27,7 +27,7 @@ Options:
   -h, --help    Show this help
 
 Runtimes available in the container:
-  lua5.1, luajit (upstream, built from source), luau (built from source)
+  lua5.1, luau (built from source)
 
 EOF
     exit 0