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| 1 | +#!/bin/sh |
| 2 | + |
| 3 | +set -e |
| 4 | + |
| 5 | +ME=$(basename "$0") |
| 6 | + |
| 7 | +entrypoint_log() { |
| 8 | + if [ -z "${NGINX_ENTRYPOINT_QUIET_LOGS:-}" ]; then |
| 9 | + echo "$@" |
| 10 | + fi |
| 11 | +} |
| 12 | + |
| 13 | +add_stream_block() { |
| 14 | + local conffile="/etc/nginx/nginx.conf" |
| 15 | + |
| 16 | + if grep -q -E "\s*stream\s*\{" "$conffile"; then |
| 17 | + entrypoint_log "$ME: $conffile contains a stream block; include $stream_output_dir/*.conf to enable stream templates" |
| 18 | + else |
| 19 | + # check if the file can be modified, e.g. not on a r/o filesystem |
| 20 | + touch "$conffile" 2>/dev/null || { entrypoint_log "$ME: info: can not modify $conffile (read-only file system?)"; exit 0; } |
| 21 | + entrypoint_log "$ME: Appending stream block to $conffile to include $stream_output_dir/*.conf" |
| 22 | + cat << END >> "$conffile" |
| 23 | +# added by "$ME" on "$(date)" |
| 24 | +stream { |
| 25 | + include $stream_output_dir/*.conf; |
| 26 | +} |
| 27 | +END |
| 28 | + fi |
| 29 | +} |
| 30 | + |
| 31 | +auto_envsubst() { |
| 32 | + local template_dir="${NGINX_ENVSUBST_TEMPLATE_DIR:-/etc/nginx/templates}" |
| 33 | + local suffix="${NGINX_ENVSUBST_TEMPLATE_SUFFIX:-.template}" |
| 34 | + local output_dir="${NGINX_ENVSUBST_OUTPUT_DIR:-/etc/nginx/conf.d}" |
| 35 | + local stream_suffix="${NGINX_ENVSUBST_STREAM_TEMPLATE_SUFFIX:-.stream-template}" |
| 36 | + local stream_output_dir="${NGINX_ENVSUBST_STREAM_OUTPUT_DIR:-/etc/nginx/stream-conf.d}" |
| 37 | + local filter="${NGINX_ENVSUBST_FILTER:-}" |
| 38 | + |
| 39 | + local template defined_envs relative_path output_path subdir |
| 40 | + defined_envs=$(printf '${%s} ' $(awk "END { for (name in ENVIRON) { print ( name ~ /${filter}/ ) ? name : \"\" } }" < /dev/null )) |
| 41 | + [ -d "$template_dir" ] || return 0 |
| 42 | + if [ ! -w "$output_dir" ]; then |
| 43 | + entrypoint_log "$ME: ERROR: $template_dir exists, but $output_dir is not writable" |
| 44 | + return 0 |
| 45 | + fi |
| 46 | + find "$template_dir" -follow -type f -name "*$suffix" -print | while read -r template; do |
| 47 | + relative_path="${template#"$template_dir/"}" |
| 48 | + output_path="$output_dir/${relative_path%"$suffix"}" |
| 49 | + subdir=$(dirname "$relative_path") |
| 50 | + # create a subdirectory where the template file exists |
| 51 | + mkdir -p "$output_dir/$subdir" |
| 52 | + entrypoint_log "$ME: Running envsubst on $template to $output_path" |
| 53 | + envsubst "$defined_envs" < "$template" > "$output_path" |
| 54 | + done |
| 55 | + |
| 56 | + # Print the first file with the stream suffix, this will be false if there are none |
| 57 | + if test -n "$(find "$template_dir" -name "*$stream_suffix" -print -quit)"; then |
| 58 | + mkdir -p "$stream_output_dir" |
| 59 | + if [ ! -w "$stream_output_dir" ]; then |
| 60 | + entrypoint_log "$ME: ERROR: $template_dir exists, but $stream_output_dir is not writable" |
| 61 | + return 0 |
| 62 | + fi |
| 63 | + add_stream_block |
| 64 | + find "$template_dir" -follow -type f -name "*$stream_suffix" -print | while read -r template; do |
| 65 | + relative_path="${template#"$template_dir/"}" |
| 66 | + output_path="$stream_output_dir/${relative_path%"$stream_suffix"}" |
| 67 | + subdir=$(dirname "$relative_path") |
| 68 | + # create a subdirectory where the template file exists |
| 69 | + mkdir -p "$stream_output_dir/$subdir" |
| 70 | + entrypoint_log "$ME: Running envsubst on $template to $output_path" |
| 71 | + envsubst "$defined_envs" < "$template" > "$output_path" |
| 72 | + done |
| 73 | + fi |
| 74 | +} |
| 75 | + |
| 76 | +auto_envsubst |
| 77 | + |
| 78 | +exit 0 |
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