60 lines
2.5 KiB
Bash
Executable File
60 lines
2.5 KiB
Bash
Executable File
#!/bin/sh
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# https://github.com/nginxinc/docker-nginx/blob/master/entrypoint/20-envsubst-on-templates.sh
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# https://github.com/nginxinc/docker-nginx/blob/master/LICENSE
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# Copyright (C) 2011-2016 Nginx, Inc.
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# All rights reserved.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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set -e
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ME=$(basename $0)
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auto_envsubst() {
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local template_dir="${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 template defined_envs relative_path output_path subdir
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defined_envs=$(printf '${%s} ' $(env | cut -d= -f1))
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[ -d "$template_dir" ] || return 0
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if [ ! -w "$output_dir" ]; then
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echo >&3 "$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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# create a subdirectory where the template file exists
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mkdir -p "$output_dir/$subdir"
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echo >&3 "$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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}
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auto_envsubst
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exit 0
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