Add support for Heroku-26 and bump versions

- Add support for Heroku-26.
- Update nginx from 1.28.0 to 1.28.3:
  https://nginx.org/en/CHANGES-1.28
- Update headers-more-nginx-module from 0.38 to 0.39:
  openresty/headers-more-nginx-module@v0.38...v0.39
- Update Ruby from 3.2.8 to 3.4.9.

I've bundled these into one PR since otherwise the rebase dance
would be a pain, given the need to compile/vendor the binaries.

GUS-W-20776675.

Author: edmorley

CHANGELOG.md

@@ -5,6 +5,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [unreleased] - YYYY-MM-DD
+### Changes
+- Add support for Heroku-26.
+- Update nginx from 1.28.0 to 1.28.3.
+- Update headers-more-nginx-module from 0.38 to 0.39.
+- Update Ruby from 3.2.8 to 3.4.9.
 
 ## [1.16] - 2026-02-26
 ### Changes

Makefile

@@ -1,15 +1,23 @@
-build: build-heroku-22 build-heroku-24
+.PHONY: build build-heroku-22 build-heroku-24 build-heroku-26 shell
+
+build: build-heroku-22 build-heroku-24 build-heroku-26
 
 build-heroku-22:
 	@echo "Building nginx in Docker for heroku-22..."
-	@docker run -v $(shell pwd):/buildpack --rm -it -e "STACK=heroku-22" -w /buildpack heroku/heroku:22-build scripts/build_nginx /buildpack/nginx-heroku-22.tgz
+	@docker run -v $(shell pwd):/buildpack --rm -it -e "STACK=heroku-22" -w /buildpack --platform linux/amd64 heroku/heroku:22-build scripts/build_nginx /buildpack/nginx-heroku-22.tgz
 
 build-heroku-24:
 	@echo "Building nginx in Docker for heroku-24 (amd64)..."
 	@docker run -v $(shell pwd):/buildpack --rm -it -e "STACK=heroku-24" -w /buildpack --platform linux/amd64 heroku/heroku:24-build scripts/build_nginx /buildpack/nginx-heroku-24-amd64.tgz
 	@echo "Building nginx in Docker for heroku-24 (arm64)..."
 	@docker run -v $(shell pwd):/buildpack --rm -it -e "STACK=heroku-24" -w /buildpack --platform linux/arm64 heroku/heroku:24-build scripts/build_nginx /buildpack/nginx-heroku-24-arm64.tgz
 
+build-heroku-26:
+	@echo "Building nginx in Docker for heroku-26 (amd64)..."
+	@docker run -v $(shell pwd):/buildpack --rm -it -e "STACK=heroku-26" -w /buildpack --platform linux/amd64 heroku/heroku:26-build scripts/build_nginx /buildpack/nginx-heroku-26-amd64.tgz
+	@echo "Building nginx in Docker for heroku-26 (arm64)..."
+	@docker run -v $(shell pwd):/buildpack --rm -it -e "STACK=heroku-26" -w /buildpack --platform linux/arm64 heroku/heroku:26-build scripts/build_nginx /buildpack/nginx-heroku-26-arm64.tgz
+
 shell:
-	@echo "Opening heroku-22 shell..."
-	@docker run -v $(shell pwd):/buildpack --rm -it -e "STACK=heroku-22" -e "PORT=5000" -w /buildpack heroku/heroku:22-build bash
+	@echo "Opening heroku-26 shell..."
+	@docker run -v $(shell pwd):/buildpack --rm -it -e "STACK=heroku-26" -e "PORT=5000" -w /buildpack heroku/heroku:26-build bash

README.md

@@ -19,8 +19,9 @@ These are auto-selected based on the app's stack at build time.
 
 | [Heroku Stack](https://devcenter.heroku.com/articles/stack) | Nginx Version | PCRE version |
 |--------------|--------------:|-------------:|
-| [Heroku-22](https://devcenter.heroku.com/articles/heroku-22-stack) | 1.28.0 | PCRE1 (8.x) |
-| [Heroku-24](https://devcenter.heroku.com/articles/heroku-24-stack) | 1.28.0 | PCRE2 (10.x) |
+| [Heroku-22](https://devcenter.heroku.com/articles/heroku-22-stack) | 1.28.3 | PCRE1 (8.x) |
+| [Heroku-24](https://devcenter.heroku.com/articles/heroku-24-stack) | 1.28.3 | PCRE2 (10.x) |
+| [Heroku-26](https://devcenter.heroku.com/articles/heroku-26-stack) | 1.28.3 | PCRE2 (10.x) |
 
 ## Presets
 

bin/compile

@@ -10,7 +10,7 @@ BUILD_DIR=$1
 CACHE_DIR=$2
 BUILDPACK_DIR="$(dirname "$(dirname "$0")")"
 
-ruby_version="3.2.8"
+ruby_version="3.4.9"
 if [[ $STACK == "heroku-22" ]]; then
 	nginx_tarball=nginx-${STACK}.tgz
 	ruby_tarball=${STACK}/ruby-${ruby_version}.tgz

nginx-heroku-22.tgz

@@ -9,8 +9,8 @@ set -o pipefail
 # fail harder
 set -eu
 
-NGINX_VERSION=${NGINX_VERSION-1.28.0}
-HEADERS_MORE_VERSION=${HEADERS_MORE_VERSION-0.38}
+NGINX_VERSION=${NGINX_VERSION-1.28.3}
+HEADERS_MORE_VERSION=${HEADERS_MORE_VERSION-0.39}
 UUID4_VERSION=${UUID4_VERSION-f8f7ff44e6a8c6cf75232ae4b63d011f2f3b34c1}
 
 nginx_tarball_url=https://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz