deps: upgrade to Varnish 8.0 and Wasmtime 44

- Switch Varnish from packagecloud/varnish75 to packagecloud/varnish80
- Upgrade Wasmtime C API from v25 to v44.0.0
- Fix hdr_t cast for Varnish 8 API compatibility (proxy_wasm.c)
- Simplify CI to single build (remove version matrix)
- Update minimum varnishapi requirement to >= 8.0

Author: RamazanKara

.github/workflows/ci.yml

@@ -9,18 +9,13 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        varnish-version: ['7.5']
-        wasmtime-version: ['25.0.0']
 
     steps:
       - uses: actions/checkout@v4
 
       - name: Build and test in Docker
         run: |
           docker build \
-            --build-arg VARNISH_VERSION=${{ matrix.varnish-version }} \
-            --build-arg WASMTIME_VERSION=${{ matrix.wasmtime-version }} \
+            --build-arg WASMTIME_VERSION=44.0.0 \
             -t vmod-wasm-test .
           docker run --rm vmod-wasm-test make check

CHANGELOG.md

@@ -10,7 +10,7 @@ All notable changes to vmod-wasm will be documented in this file.
 - `wasm.load(name, path)` — Load `.wasm` modules at VCL init
 - `wasm.execute(module, func)` — Call exported Wasm functions from VCL
 - `wasm.version()` — Return VMOD version string
-- Wasmtime C API v25 integration with engine/linker/store lifecycle
+- Wasmtime C API integration with engine/linker/store lifecycle
 - Thread-safe module registry (read-write lock, up to 64 modules)
 
 #### Host Functions
@@ -45,7 +45,7 @@ All notable changes to vmod-wasm will be documented in this file.
 - Memory allocator protocol via `proxy_on_memory_allocate` export
 
 #### Infrastructure
-- Dockerfile with Debian bookworm-slim, Varnish 7.5, Wasmtime 25, Rust
+- Dockerfile with Debian bookworm-slim, Varnish 8.0, Wasmtime 44, Rust
 - GitHub Actions CI pipeline
 - autotools build system (automake/autoconf/libtool)
 - 12 VTC tests

Dockerfile

@@ -1,7 +1,6 @@
 FROM debian:bookworm-slim
 
-ARG VARNISH_VERSION=7.5
-ARG WASMTIME_VERSION=25.0.0
+ARG WASMTIME_VERSION=44.0.0
 
 # Install build dependencies
 RUN apt-get update && apt-get install -y \
@@ -18,9 +17,10 @@ RUN apt-get update && apt-get install -y \
     xz-utils \
     && rm -rf /var/lib/apt/lists/*
 
-# Install Varnish from official repo
-RUN curl -fsSL https://packagecloud.io/varnishcache/varnish75/gpgkey | gpg --dearmor -o /usr/share/keyrings/varnish.gpg \
-    && echo "deb [signed-by=/usr/share/keyrings/varnish.gpg] https://packagecloud.io/varnishcache/varnish75/debian/ bookworm main" \
+# Install Varnish 8.0 from packagecloud
+RUN curl -fsSL https://packagecloud.io/varnishcache/varnish80/gpgkey \
+       | gpg --dearmor -o /usr/share/keyrings/varnish.gpg \
+    && echo "deb [signed-by=/usr/share/keyrings/varnish.gpg] https://packagecloud.io/varnishcache/varnish80/debian/ bookworm main" \
        > /etc/apt/sources.list.d/varnish.list \
     && apt-get update \
     && apt-get install -y varnish-dev varnish \

README.md

@@ -94,8 +94,8 @@ See [`examples/rust/src/lib.rs`](examples/rust/src/lib.rs) for a complete exampl
 
 ### Prerequisites
 
-- Varnish Cache 7.5+ (with dev headers)
-- Wasmtime C API v25+
+- Varnish Cache 8.0+ (with dev headers)
+- Wasmtime C API v44+
 - autotools, pkg-config, C compiler
 
 ### Build

configure.ac

@@ -19,7 +19,7 @@ AC_PROG_INSTALL
 PKG_PROG_PKG_CONFIG
 
 # Find Varnish
-PKG_CHECK_MODULES([VARNISHAPI], [varnishapi >= 7.0])
+PKG_CHECK_MODULES([VARNISHAPI], [varnishapi >= 8.0])
 
 # Find vmodtool.py
 AC_ARG_VAR([VMODTOOL], [path to vmodtool.py])

src/proxy_wasm.c

@@ -293,7 +293,7 @@ pw_proxy_get_header_map_value(void *env, wasmtime_caller_t *caller,
 	hdr_search[0] = (char)i;
 
 	val = NULL;
-	if (!http_GetHdr(hp, hdr_search, &val) || val == NULL) {
+	if (!http_GetHdr(hp, (hdr_t)hdr_search, &val) || val == NULL) {
 		results[0].of.i32 = PROXY_NOT_FOUND;
 		return (NULL);
 	}
@@ -442,7 +442,7 @@ pw_proxy_remove_header_map_value(void *env, wasmtime_caller_t *caller,
 	}
 	hdr_search[0] = (char)i;
 
-	http_Unset(hp, hdr_search);
+	http_Unset(hp, (hdr_t)hdr_search);
 
 	results[0].of.i32 = PROXY_OK;
 	return (NULL);