initial commit

image-entry.d/73-expand-templates.sh

@@ -0,0 +1,114 @@
+#!/bin/sh
+set -f
+
+. /run/ngx/iep/00-common.envsh
+
+## Angie: unset core variables
+unset ANGIE ANGIE_BPF_MAPS
+
+[ "${NGX_STRICT_LOAD}" = 0 ] || set -e
+
+cd "${target_root}/"
+
+expand_error_delim() {
+	IEP_DEBUG=0 log_always ' ----------------------------------- '
+}
+unset expand_error_seen
+expand_error() {
+	[ "${expand_error_seen:-}" != 1 ] || return
+	expand_error_seen=1
+	expand_error_delim
+	log_always 'template expansion has failed'
+	if [ "${NGX_STRICT_LOAD}" = 1 ] ; then
+		t=15
+		log_always "injecting delay for $t seconds"
+		expand_error_delim
+		sleep $t
+		exit 1
+	fi
+	expand_error_delim
+}
+
+set +e
+## NB: j2cfg/ and static/ are handled separately
+merge_dirs=$(find ./ -follow -mindepth 1 -maxdepth 1 -type d -printf '%P/\n' | grep -Fxv -e j2cfg/ -e static/ | sort -uV)
+[ "${NGX_STRICT_LOAD}" = 0 ] || set -e
+
+unset ENVSUBST_ARGS
+ENVSUBST_ARGS="${volume_root}/diag.envsubst.txt"
+envsubst-args.sh > "${ENVSUBST_ARGS}"
+export ENVSUBST_ARGS
+
+## envsubst is simple and fast
+## expand j2cfg/ first, then other directories
+expand_dir_envsubst j2cfg/ || expand_error
+expand_dir_envsubst ${merge_dirs} || expand_error
+
+## j2cfg is more complex
+
+unset J2CFG_CONFIG
+set -a
+J2CFG_PATH="${target_root}/j2cfg"
+J2CFG_SEARCH_PATH="${target_root}"
+set +a
+
+## expand j2cfg/ first
+expand_dir_j2cfg j2cfg/ || expand_error
+
+## dump [merged] j2cfg config
+j2cfg_dump="${volume_root}/diag.j2cfg.yml"
+j2cfg-dump > "${j2cfg_dump}" || expand_error
+export J2CFG_CONFIG="${j2cfg_dump}"
+
+## expand other directories
+expand_dir_j2cfg ${merge_dirs} || expand_error
+
+## expand static/
+## remove template sources in order to avoid leaking sensitive data
+if [ "${NGX_HTTP_STATIC_TEMPLATE}" = 1 ] ; then
+	template_list=$(mktemp)
+
+	find static/ -follow -name '*.in' -type f \
+	| {
+		set +e
+		if [ -n "${NGX_STATIC_EXCLUDE_REGEX:-}" ] ; then
+			grep -Ev -e "${NGX_STATIC_EXCLUDE_REGEX}"
+		elif [ -n "${NGX_STATIC_INCLUDE_REGEX:-}" ] ; then
+			grep -E -e "${NGX_STATIC_INCLUDE_REGEX}"
+		else
+			cat
+		fi
+	} \
+	| sort -uV > "${template_list}"
+
+	while read -r src ; do
+		[ -n "${src}" ] || continue
+		expand_file_envsubst "${src}" || expand_error
+		rm -fv "${src}"
+	done < "${template_list}"
+
+	find static/ -follow -name '*.j2' -type f -printf '%p\0' \
+	| {
+		set +e
+		if [ -n "${NGX_STATIC_EXCLUDE_REGEX:-}" ] ; then
+			grep -zEv -e "${NGX_STATIC_EXCLUDE_REGEX}"
+		elif [ -n "${NGX_STATIC_INCLUDE_REGEX:-}" ] ; then
+			grep -zE -e "${NGX_STATIC_INCLUDE_REGEX}"
+		else
+			cat
+		fi
+	} \
+	| sort -zuV > "${template_list}"
+
+	if [ -s "${template_list}" ] ; then
+		xargs -0r -n 1000 -a "${template_list}" \
+		j2cfg-multi < /dev/null || expand_error
+
+		xargs -0r -n 1000 -a "${template_list}" \
+		rm -fv < /dev/null
+	fi
+
+	rm -f "${template_list}"
+fi
+
+exit 0