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#!/bin/sh |
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set -e |
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ME=$(basename "$0") |
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entrypoint_log() { |
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if [ -z "${NGINX_ENTRYPOINT_QUIET_LOGS:-}" ]; then |
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echo "$@" |
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fi |
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} |
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add_stream_block() { |
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local conffile="/etc/nginx/nginx.conf" |
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if grep -q -E "\s*stream\s*\{" "$conffile"; then |
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entrypoint_log "$ME: $conffile contains a stream block; include $stream_output_dir/*.conf to enable stream templates" |
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else |
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touch "$conffile" 2>/dev/null || { entrypoint_log "$ME: info: can not modify $conffile (read-only file system?)"; exit 0; } |
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entrypoint_log "$ME: Appending stream block to $conffile to include $stream_output_dir/*.conf" |
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cat << END >> "$conffile" |
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# added by "$ME" on "$(date)" |
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stream { |
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include $stream_output_dir/*.conf; |
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} |
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END |
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fi |
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} |
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auto_envsubst() { |
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local template_dir="${NGINX_ENVSUBST_TEMPLATE_DIR:-/etc/nginx/templates}" |
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local suffix="${NGINX_ENVSUBST_TEMPLATE_SUFFIX:-.template}" |
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local output_dir="${NGINX_ENVSUBST_OUTPUT_DIR:-/etc/nginx/conf.d}" |
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local stream_suffix="${NGINX_ENVSUBST_STREAM_TEMPLATE_SUFFIX:-.stream-template}" |
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local stream_output_dir="${NGINX_ENVSUBST_STREAM_OUTPUT_DIR:-/etc/nginx/stream-conf.d}" |
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local filter="${NGINX_ENVSUBST_FILTER:-}" |
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local template defined_envs relative_path output_path subdir |
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defined_envs=$(printf '${%s} ' $(awk "END { for (name in ENVIRON) { print ( name ~ /${filter}/ ) ? name : \"\" } }" < /dev/null )) |
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[ -d "$template_dir" ] || return 0 |
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if [ ! -w "$output_dir" ]; then |
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entrypoint_log "$ME: ERROR: $template_dir exists, but $output_dir is not writable" |
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return 0 |
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fi |
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find "$template_dir" -follow -type f -name "*$suffix" -print | while read -r template; do |
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relative_path="${template#"$template_dir/"}" |
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output_path="$output_dir/${relative_path%"$suffix"}" |
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subdir=$(dirname "$relative_path") |
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mkdir -p "$output_dir/$subdir" |
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entrypoint_log "$ME: Running envsubst on $template to $output_path" |
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envsubst "$defined_envs" < "$template" > "$output_path" |
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done |
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if test -n "$(find "$template_dir" -name "*$stream_suffix" -print -quit)"; then |
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mkdir -p "$stream_output_dir" |
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if [ ! -w "$stream_output_dir" ]; then |
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entrypoint_log "$ME: ERROR: $template_dir exists, but $stream_output_dir is not writable" |
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return 0 |
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fi |
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add_stream_block |
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find "$template_dir" -follow -type f -name "*$stream_suffix" -print | while read -r template; do |
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relative_path="${template#"$template_dir/"}" |
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output_path="$stream_output_dir/${relative_path%"$stream_suffix"}" |
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subdir=$(dirname "$relative_path") |
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mkdir -p "$stream_output_dir/$subdir" |
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entrypoint_log "$ME: Running envsubst on $template to $output_path" |
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envsubst "$defined_envs" < "$template" > "$output_path" |
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done |
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fi |
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} |
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auto_envsubst |
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exit 0 |
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