Dockerfile-yum.template

FROM PLACEHOLDER

ENV CATALINA_HOME /usr/local/tomcat
ENV PATH $CATALINA_HOME/bin:$PATH
RUN mkdir -p "$CATALINA_HOME"
WORKDIR $CATALINA_HOME

# let "Tomcat Native" live somewhere isolated
ENV TOMCAT_NATIVE_LIBDIR $CATALINA_HOME/native-jni-lib
ENV LD_LIBRARY_PATH ${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}$TOMCAT_NATIVE_LIBDIR

# see https://www.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/KEYS
# see also "update.sh" (https://github.com/docker-library/tomcat/blob/master/update.sh)
ENV GPG_KEYS placeholder

ENV TOMCAT_MAJOR placeholder
ENV TOMCAT_VERSION placeholder
ENV TOMCAT_SHA512 placeholder

RUN set -eux; \
	\
# http://yum.baseurl.org/wiki/YumDB.html
	if ! command -v yumdb > /dev/null; then \
		yum install -y yum-utils; \
		yumdb set reason dep yum-utils; \
	fi; \
	if [ -f /etc/oracle-release ]; then \
# TODO there's an odd bug on Oracle Linux where installing "cpp" (which gets pulled in as a dependency of "gcc") and then marking it as automatically-installed will result in the "filesystem" package being removed during "yum autoremove" (which then fails), so we set it as manually-installed to compensate
		yumdb set reason user filesystem; \
	fi; \
# a helper function to "yum install" things, but only if they aren't installed (and to set their "reason" to "dep" so "yum autoremove" can purge them for us)
	_yum_install_temporary() { ( set -eu +x; \
		local pkg todo=''; \
		for pkg; do \
			if ! rpm --query "$pkg" > /dev/null 2>&1; then \
				todo="$todo $pkg"; \
			fi; \
		done; \
		if [ -n "$todo" ]; then \
			set -x; \
			yum install -y $todo; \
			yumdb set reason dep $todo; \
		fi; \
	) }; \
	_yum_install_temporary gzip tar; \
	\
	ddist() { \
		local f="$1"; shift; \
		local distFile="$1"; shift; \
		local success=; \
		local distUrl=; \
		for distUrl in \
# https://issues.apache.org/jira/browse/INFRA-8753?focusedCommentId=14735394#comment-14735394
			'https://www.apache.org/dyn/closer.cgi?action=download&filename=' \
# if the version is outdated (or we're grabbing the .asc file), we might have to pull from the dist/archive :/
			https://www-us.apache.org/dist/ \
			https://www.apache.org/dist/ \
			https://archive.apache.org/dist/ \
		; do \
			if curl -fL -o "$f" "$distUrl$distFile" && [ -s "$f" ]; then \
				success=1; \
				break; \
			fi; \
		done; \
		[ -n "$success" ]; \
	}; \
	\
	ddist 'tomcat.tar.gz' "tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz"; \
	echo "$TOMCAT_SHA512 *tomcat.tar.gz" | sha512sum --strict --check -; \
	ddist 'tomcat.tar.gz.asc' "tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz.asc"; \
	export GNUPGHOME="$(mktemp -d)"; \
	for key in $GPG_KEYS; do \
		gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
	done; \
	gpg --batch --verify tomcat.tar.gz.asc tomcat.tar.gz; \
	tar -xf tomcat.tar.gz --strip-components=1; \
	rm bin/*.bat; \
	rm tomcat.tar.gz*; \
	command -v gpgconf && gpgconf --kill all || :; \
	rm -rf "$GNUPGHOME"; \
	\
# https://tomcat.apache.org/tomcat-9.0-doc/security-howto.html#Default_web_applications
	mv webapps webapps.dist; \
	mkdir webapps; \
# we don't delete them completely because they're frankly a pain to get back for users who do want them, and they're generally tiny (~7MB)
	\
	nativeBuildDir="$(mktemp -d)"; \
	tar -xf bin/tomcat-native.tar.gz -C "$nativeBuildDir" --strip-components=1; \
	_yum_install_temporary \
		apr-devel \
		gcc \
		make \
		openssl-devel \
	; \
	( \
		export CATALINA_HOME="$PWD"; \
		cd "$nativeBuildDir/native"; \
		aprConfig="$(command -v apr-1-config)"; \
		./configure \
			--libdir="$TOMCAT_NATIVE_LIBDIR" \
			--prefix="$CATALINA_HOME" \
			--with-apr="$aprConfig" \
			--with-java-home="$JAVA_HOME" \
			--with-ssl=yes; \
		make -j "$(nproc)"; \
		make install; \
	); \
	rm -rf "$nativeBuildDir"; \
	rm bin/tomcat-native.tar.gz; \
	\
# mark any explicit dependencies as manually installed
	deps="$( \
		find "$TOMCAT_NATIVE_LIBDIR" -type f -executable -exec ldd '{}' ';' \
			| awk '/=>/ && $(NF-1) != "=>" { print $(NF-1) }' \
			| sort -u \
			| xargs -r rpm --query --whatprovides \
			| sort -u \
	)"; \
	[ -z "$deps" ] || yumdb set reason user $deps; \
	\
# clean up anything added temporarily and not later marked as necessary
	yum autoremove -y; \
	yum clean all; \
	rm -rf /var/cache/yum; \
	\
# sh removes env vars it doesn't support (ones with periods)
# https://github.com/docker-library/tomcat/issues/77
	find ./bin/ -name '*.sh' -exec sed -ri 's|^#!/bin/sh$|#!/usr/bin/env bash|' '{}' +; \
	\
# fix permissions (especially for running as non-root)
# https://github.com/docker-library/tomcat/issues/35
	chmod -R +rX .; \
	chmod 777 logs temp work

# verify Tomcat Native is working properly
RUN set -e \
	&& nativeLines="$(catalina.sh configtest 2>&1)" \
	&& nativeLines="$(echo "$nativeLines" | grep 'Apache Tomcat Native')" \
	&& nativeLines="$(echo "$nativeLines" | sort -u)" \
	&& if ! echo "$nativeLines" | grep 'INFO: Loaded APR based Apache Tomcat Native library' >&2; then \
		echo >&2 "$nativeLines"; \
		exit 1; \
	fi

EXPOSE 8080
CMD ["catalina.sh", "run"]